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- Committer: Teddy Hogeborn
- Date: 2008-08-24 10:49:09 UTC
- mfrom: (24.1.63 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080824104909-loh761dpgglkvos1
* mandos (fingerprint): Bug fix: Check crtverify.value, not crtverify.
* mandos-keygen (password): Also print "host = ".
* plugins.d/password-request.c (pgp_packet_decrypt): Only print
detailed result
of decryption if
it failed.
* mandos-keygen (password): Also print "host = ".
* plugins.d/password-request.c (pgp_packet_decrypt): Only print
detailed result
of decryption if
it failed.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-request.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
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
36
38
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
38
stdout, ferror() */
41
39
#include <stdint.h> /* uint16_t, uint32_t */
42
40
#include <stddef.h> /* NULL, size_t, ssize_t */
43
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
42
srand() */
45
#include <stdbool.h> /* bool, false, true */
43
#include <stdbool.h> /* bool, true */
46
44
#include <string.h> /* memset(), strcmp(), strlen(),
47
45
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
53
#include <sys/stat.h> /* open() */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
54
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
inet_pton(), connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
53
struct in6_addr, inet_pton(),
54
connect() */
60
55
#include <assert.h> /* assert() */
61
56
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
57
#include <time.h> /* time() */
63
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
59
SIOCSIFFLAGS, if_indextoname(),
65
60
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
69
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
62
getuid(), getgid(), setuid(),
71
63
setgid() */
64
#include <netinet/in.h>
72
65
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
66
#include <iso646.h> /* not, and */
74
67
#include <argp.h> /* struct argp_option, error_t, struct
75
68
argp_state, struct argp,
76
69
argp_parse(), ARGP_KEY_ARG,
77
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
85
71
86
72
/* Avahi */
87
73
/* All Avahi types, constants and functions
100
86
gnutls_*
101
87
init_gnutls_session(),
102
88
GNUTLS_* */
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
105
90
GNUTLS_OPENPGP_FMT_BASE64 */
106
91
107
92
/* GPGME */
113
98
114
99
#define BUFFER_SIZE 256
115
100
116
#define PATHDIR "/conf/conf.d/mandos"
117
#define SECKEY "seckey.txt"
118
#define PUBKEY "pubkey.txt"
119
120
101
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
121
103
static const char mandos_protocol_version[] = "1";
122
const char *argp_program_version = "mandos-client " VERSION;
104
const char *argp_program_version = "password-request 1.0";
123
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
124
106
125
107
/* Used for passing in values through the Avahi callback functions */
130
112
unsigned int dh_bits;
131
113
gnutls_dh_params_t dh_params;
132
114
const char *priority;
133
gpgme_ctx_t ctx;
134
115
} mandos_context;
135
116
136
/* global context so signal handler can reach it*/
137
mandos_context mc;
138
139
117
/*
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
141
* bytes. "buffer_capacity" is how much is currently allocated,
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
142
120
* "buffer_length" is how much is already used.
143
121
*/
144
size_t incbuffer(char **buffer, size_t buffer_length,
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
145
123
size_t buffer_capacity){
146
if(buffer_length + BUFFER_SIZE > buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
147
125
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
148
if(buffer == NULL){
126
if (buffer == NULL){
149
127
return 0;
150
128
}
151
129
buffer_capacity += BUFFER_SIZE;
154
132
}
155
133
156
134
/*
157
* Initialize GPGME.
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
158
137
*/
159
static bool init_gpgme(const char *seckey,
160
const char *pubkey, const char *tempdir){
161
int ret;
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;
162
144
gpgme_error_t rc;
145
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
163
148
gpgme_engine_info_t engine_info;
164
149
165
166
/*
167
* Helper function to insert pub and seckey to the engine keyring.
168
*/
169
bool import_key(const char *filename){
170
int fd;
171
gpgme_data_t pgp_data;
172
173
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
174
if(fd == -1){
175
perror("open");
176
return false;
177
}
178
179
rc = gpgme_data_new_from_fd(&pgp_data, fd);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
rc = gpgme_op_import(mc.ctx, pgp_data);
187
if(rc != GPG_ERR_NO_ERROR){
188
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
189
gpgme_strsource(rc), gpgme_strerror(rc));
190
return false;
191
}
192
193
ret = (int)TEMP_FAILURE_RETRY(close(fd));
194
if(ret == -1){
195
perror("close");
196
}
197
gpgme_data_release(pgp_data);
198
return true;
199
}
200
201
if(debug){
202
fprintf(stderr, "Initializing GPGME\n");
150
if (debug){
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
203
152
}
204
153
205
154
/* Init GPGME */
206
155
gpgme_check_version(NULL);
207
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
208
if(rc != GPG_ERR_NO_ERROR){
157
if (rc != GPG_ERR_NO_ERROR){
209
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
210
159
gpgme_strsource(rc), gpgme_strerror(rc));
211
return false;
160
return -1;
212
161
}
213
162
214
/* Set GPGME home directory for the OpenPGP engine only */
215
rc = gpgme_get_engine_info(&engine_info);
216
if(rc != GPG_ERR_NO_ERROR){
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){
217
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
218
167
gpgme_strsource(rc), gpgme_strerror(rc));
219
return false;
168
return -1;
220
169
}
221
170
while(engine_info != NULL){
222
171
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
223
172
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
224
engine_info->file_name, tempdir);
173
engine_info->file_name, homedir);
225
174
break;
226
175
}
227
176
engine_info = engine_info->next;
228
177
}
229
178
if(engine_info == NULL){
230
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
231
return false;
232
}
233
234
/* Create new GPGME "context" */
235
rc = gpgme_new(&(mc.ctx));
236
if(rc != GPG_ERR_NO_ERROR){
237
fprintf(stderr, "bad gpgme_new: %s: %s\n",
238
gpgme_strsource(rc), gpgme_strerror(rc));
239
return false;
240
}
241
242
if(not import_key(pubkey) or not import_key(seckey)){
243
return false;
244
}
245
246
return true;
247
}
248
249
/*
250
* Decrypt OpenPGP data.
251
* Returns -1 on error
252
*/
253
static ssize_t pgp_packet_decrypt(const char *cryptotext,
254
size_t crypto_size,
255
char **plaintext){
256
gpgme_data_t dh_crypto, dh_plain;
257
gpgme_error_t rc;
258
ssize_t ret;
259
size_t plaintext_capacity = 0;
260
ssize_t plaintext_length = 0;
261
262
if(debug){
263
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
180
return -1;
264
181
}
265
182
266
183
/* Create new GPGME data buffer from memory cryptotext */
267
184
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
268
185
0);
269
if(rc != GPG_ERR_NO_ERROR){
186
if (rc != GPG_ERR_NO_ERROR){
270
187
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
271
188
gpgme_strsource(rc), gpgme_strerror(rc));
272
189
return -1;
274
191
275
192
/* Create new empty GPGME data buffer for the plaintext */
276
193
rc = gpgme_data_new(&dh_plain);
277
if(rc != GPG_ERR_NO_ERROR){
194
if (rc != GPG_ERR_NO_ERROR){
278
195
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
279
196
gpgme_strsource(rc), gpgme_strerror(rc));
280
197
gpgme_data_release(dh_crypto);
281
198
return -1;
282
199
}
283
200
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
284
210
/* Decrypt data from the cryptotext data buffer to the plaintext
285
211
data buffer */
286
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
287
if(rc != GPG_ERR_NO_ERROR){
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
if (rc != GPG_ERR_NO_ERROR){
288
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
289
215
gpgme_strsource(rc), gpgme_strerror(rc));
290
216
plaintext_length = -1;
291
if(debug){
217
if (debug){
292
218
gpgme_decrypt_result_t result;
293
result = gpgme_op_decrypt_result(mc.ctx);
294
if(result == NULL){
219
result = gpgme_op_decrypt_result(ctx);
220
if (result == NULL){
295
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
296
222
} else {
297
223
fprintf(stderr, "Unsupported algorithm: %s\n",
324
250
}
325
251
326
252
/* Seek back to the beginning of the GPGME plaintext data buffer */
327
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
328
perror("gpgme_data_seek");
253
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
perror("pgpme_data_seek");
329
255
plaintext_length = -1;
330
256
goto decrypt_end;
331
257
}
332
258
333
259
*plaintext = NULL;
334
260
while(true){
335
plaintext_capacity = incbuffer(plaintext,
261
plaintext_capacity = adjustbuffer(plaintext,
336
262
(size_t)plaintext_length,
337
263
plaintext_capacity);
338
if(plaintext_capacity == 0){
339
perror("incbuffer");
264
if (plaintext_capacity == 0){
265
perror("adjustbuffer");
340
266
plaintext_length = -1;
341
267
goto decrypt_end;
342
268
}
344
270
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
345
271
BUFFER_SIZE);
346
272
/* Print the data, if any */
347
if(ret == 0){
273
if (ret == 0){
348
274
/* EOF */
349
275
break;
350
276
}
355
281
}
356
282
plaintext_length += ret;
357
283
}
358
284
359
285
if(debug){
360
286
fprintf(stderr, "Decrypted password is: ");
361
287
for(ssize_t i = 0; i < plaintext_length; i++){
374
300
return plaintext_length;
375
301
}
376
302
377
static const char * safer_gnutls_strerror(int value){
378
const char *ret = gnutls_strerror(value); /* Spurious warning from
379
-Wunreachable-code */
380
if(ret == NULL)
303
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value); /* Spurious warning */
305
if (ret == NULL)
381
306
ret = "(unknown)";
382
307
return ret;
383
308
}
388
313
fprintf(stderr, "GnuTLS: %s", string);
389
314
}
390
315
391
static int init_gnutls_global(const char *pubkeyfilename,
316
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfilename,
392
318
const char *seckeyfilename){
393
319
int ret;
394
320
397
323
}
398
324
399
325
ret = gnutls_global_init();
400
if(ret != GNUTLS_E_SUCCESS){
401
fprintf(stderr, "GnuTLS global_init: %s\n",
402
safer_gnutls_strerror(ret));
326
if (ret != GNUTLS_E_SUCCESS) {
327
fprintf (stderr, "GnuTLS global_init: %s\n",
328
safer_gnutls_strerror(ret));
403
329
return -1;
404
330
}
405
331
406
if(debug){
332
if (debug){
407
333
/* "Use a log level over 10 to enable all debugging options."
408
334
* - GnuTLS manual
409
335
*/
412
338
}
413
339
414
340
/* OpenPGP credentials */
415
gnutls_certificate_allocate_credentials(&mc.cred);
416
if(ret != GNUTLS_E_SUCCESS){
417
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
418
from
419
-Wunreachable-code
420
*/
421
safer_gnutls_strerror(ret));
422
gnutls_global_deinit();
341
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
344
warning */
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
423
347
return -1;
424
348
}
425
349
426
350
if(debug){
427
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
428
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
429
353
seckeyfilename);
430
354
}
431
355
432
356
ret = gnutls_certificate_set_openpgp_key_file
433
(mc.cred, pubkeyfilename, seckeyfilename,
357
(mc->cred, pubkeyfilename, seckeyfilename,
434
358
GNUTLS_OPENPGP_FMT_BASE64);
435
if(ret != GNUTLS_E_SUCCESS){
359
if (ret != GNUTLS_E_SUCCESS) {
436
360
fprintf(stderr,
437
361
"Error[%d] while reading the OpenPGP key pair ('%s',"
438
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
439
fprintf(stderr, "The GnuTLS error is: %s\n",
363
fprintf(stdout, "The GnuTLS error is: %s\n",
440
364
safer_gnutls_strerror(ret));
441
365
goto globalfail;
442
366
}
443
367
444
368
/* GnuTLS server initialization */
445
ret = gnutls_dh_params_init(&mc.dh_params);
446
if(ret != GNUTLS_E_SUCCESS){
447
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
448
" %s\n", safer_gnutls_strerror(ret));
449
goto globalfail;
450
}
451
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
452
if(ret != GNUTLS_E_SUCCESS){
453
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
454
safer_gnutls_strerror(ret));
455
goto globalfail;
456
}
457
458
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
459
369
ret = gnutls_dh_params_init(&mc->dh_params);
370
if (ret != GNUTLS_E_SUCCESS) {
371
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
372
" %s\n", safer_gnutls_strerror(ret));
373
goto globalfail;
374
}
375
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
376
if (ret != GNUTLS_E_SUCCESS) {
377
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
378
safer_gnutls_strerror(ret));
379
goto globalfail;
380
}
381
382
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
383
460
384
return 0;
461
385
462
386
globalfail:
463
464
gnutls_certificate_free_credentials(mc.cred);
387
388
gnutls_certificate_free_credentials(mc->cred);
465
389
gnutls_global_deinit();
466
gnutls_dh_params_deinit(mc.dh_params);
467
390
return -1;
391
468
392
}
469
393
470
static int init_gnutls_session(gnutls_session_t *session){
394
static int init_gnutls_session(mandos_context *mc,
395
gnutls_session_t *session){
471
396
int ret;
472
397
/* GnuTLS session creation */
473
398
ret = gnutls_init(session, GNUTLS_SERVER);
474
if(ret != GNUTLS_E_SUCCESS){
399
if (ret != GNUTLS_E_SUCCESS){
475
400
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
476
401
safer_gnutls_strerror(ret));
477
402
}
478
403
479
404
{
480
405
const char *err;
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
482
if(ret != GNUTLS_E_SUCCESS){
406
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
407
if (ret != GNUTLS_E_SUCCESS) {
483
408
fprintf(stderr, "Syntax error at: %s\n", err);
484
409
fprintf(stderr, "GnuTLS error: %s\n",
485
410
safer_gnutls_strerror(ret));
486
gnutls_deinit(*session);
411
gnutls_deinit (*session);
487
412
return -1;
488
413
}
489
414
}
490
415
491
416
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
492
mc.cred);
493
if(ret != GNUTLS_E_SUCCESS){
417
mc->cred);
418
if (ret != GNUTLS_E_SUCCESS) {
494
419
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
495
420
safer_gnutls_strerror(ret));
496
gnutls_deinit(*session);
421
gnutls_deinit (*session);
497
422
return -1;
498
423
}
499
424
500
425
/* ignore client certificate if any. */
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
426
gnutls_certificate_server_set_request (*session,
427
GNUTLS_CERT_IGNORE);
503
428
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
429
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
505
430
506
431
return 0;
507
432
}
513
438
/* Called when a Mandos server is found */
514
439
static int start_mandos_communication(const char *ip, uint16_t port,
515
440
AvahiIfIndex if_index,
516
int af){
441
mandos_context *mc){
517
442
int ret, tcp_sd;
518
ssize_t sret;
519
union {
520
struct sockaddr_in in;
521
struct sockaddr_in6 in6;
522
} to;
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
523
444
char *buffer = NULL;
524
445
char *decrypted_buffer;
525
446
size_t buffer_length = 0;
527
448
ssize_t decrypted_buffer_size;
528
449
size_t written;
529
450
int retval = 0;
451
char interface[IF_NAMESIZE];
530
452
gnutls_session_t session;
531
int pf; /* Protocol family */
532
533
switch(af){
534
case AF_INET6:
535
pf = PF_INET6;
536
break;
537
case AF_INET:
538
pf = PF_INET;
539
break;
540
default:
541
fprintf(stderr, "Bad address family: %d\n", af);
542
return -1;
543
}
544
545
ret = init_gnutls_session(&session);
546
if(ret != 0){
453
454
ret = init_gnutls_session (mc, &session);
455
if (ret != 0){
547
456
return -1;
548
457
}
549
458
550
459
if(debug){
551
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
552
461
"\n", ip, port);
553
462
}
554
463
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
556
if(tcp_sd < 0){
464
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
465
if(tcp_sd < 0) {
557
466
perror("socket");
558
467
return -1;
559
468
}
469
470
if(debug){
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
472
perror("if_indextoname");
473
return -1;
474
}
475
fprintf(stderr, "Binding to interface %s\n", interface);
476
}
560
477
561
478
memset(&to, 0, sizeof(to));
562
if(af == AF_INET6){
563
to.in6.sin6_family = (uint16_t)af;
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
565
} else { /* IPv4 */
566
to.in.sin_family = (sa_family_t)af;
567
ret = inet_pton(af, ip, &to.in.sin_addr);
568
}
569
if(ret < 0 ){
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
483
if (ret < 0 ){
570
484
perror("inet_pton");
571
485
return -1;
572
486
}
574
488
fprintf(stderr, "Bad address: %s\n", ip);
575
489
return -1;
576
490
}
577
if(af == AF_INET6){
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
579
-Wconversion and
580
-Wunreachable-code */
581
582
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
583
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
584
-Wunreachable-code*/
585
if(if_index == AVAHI_IF_UNSPEC){
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
587
" without a network interface\n");
588
return -1;
589
}
590
/* Set the network interface number as scope */
591
to.in6.sin6_scope_id = (uint32_t)if_index;
592
}
593
} else {
594
to.in.sin_port = htons(port); /* Spurious warnings from
595
-Wconversion and
596
-Wunreachable-code */
597
}
491
to.in6.sin6_port = htons(port); /* Spurious warning */
492
493
to.in6.sin6_scope_id = (uint32_t)if_index;
598
494
599
495
if(debug){
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
601
char interface[IF_NAMESIZE];
602
if(if_indextoname((unsigned int)if_index, interface) == NULL){
603
perror("if_indextoname");
604
} else {
605
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
606
ip, interface, port);
607
}
608
} else {
609
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
610
port);
611
}
612
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
613
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
614
const char *pcret;
615
if(af == AF_INET6){
616
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
617
sizeof(addrstr));
618
} else {
619
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
620
sizeof(addrstr));
621
}
622
if(pcret == NULL){
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
497
port);
498
char addrstr[INET6_ADDRSTRLEN] = "";
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
sizeof(addrstr)) == NULL){
623
501
perror("inet_ntop");
624
502
} else {
625
503
if(strcmp(addrstr, ip) != 0){
628
506
}
629
507
}
630
508
631
if(af == AF_INET6){
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
633
} else {
634
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
635
}
636
if(ret < 0){
509
ret = connect(tcp_sd, &to.in, sizeof(to));
510
if (ret < 0){
637
511
perror("connect");
638
512
return -1;
639
513
}
640
514
641
515
const char *out = mandos_protocol_version;
642
516
written = 0;
643
while(true){
517
while (true){
644
518
size_t out_size = strlen(out);
645
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
646
520
out_size - written));
647
if(ret == -1){
521
if (ret == -1){
648
522
perror("write");
649
523
retval = -1;
650
524
goto mandos_end;
653
527
if(written < out_size){
654
528
continue;
655
529
} else {
656
if(out == mandos_protocol_version){
530
if (out == mandos_protocol_version){
657
531
written = 0;
658
532
out = "\r\n";
659
533
} else {
661
535
}
662
536
}
663
537
}
664
538
665
539
if(debug){
666
540
fprintf(stderr, "Establishing TLS session with %s\n", ip);
667
541
}
668
542
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
670
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
544
671
545
do{
672
ret = gnutls_handshake(session);
546
ret = gnutls_handshake (session);
673
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
674
548
675
if(ret != GNUTLS_E_SUCCESS){
549
if (ret != GNUTLS_E_SUCCESS){
676
550
if(debug){
677
551
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
678
gnutls_perror(ret);
552
gnutls_perror (ret);
679
553
}
680
554
retval = -1;
681
555
goto mandos_end;
684
558
/* Read OpenPGP packet that contains the wanted password */
685
559
686
560
if(debug){
687
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
688
562
ip);
689
563
}
690
564
691
565
while(true){
692
buffer_capacity = incbuffer(&buffer, buffer_length,
566
buffer_capacity = adjustbuffer(&buffer, buffer_length,
693
567
buffer_capacity);
694
if(buffer_capacity == 0){
695
perror("incbuffer");
568
if (buffer_capacity == 0){
569
perror("adjustbuffer");
696
570
retval = -1;
697
571
goto mandos_end;
698
572
}
699
573
700
sret = gnutls_record_recv(session, buffer+buffer_length,
701
BUFFER_SIZE);
702
if(sret == 0){
574
ret = gnutls_record_recv(session, buffer+buffer_length,
575
BUFFER_SIZE);
576
if (ret == 0){
703
577
break;
704
578
}
705
if(sret < 0){
706
switch(sret){
579
if (ret < 0){
580
switch(ret){
707
581
case GNUTLS_E_INTERRUPTED:
708
582
case GNUTLS_E_AGAIN:
709
583
break;
710
584
case GNUTLS_E_REHANDSHAKE:
711
585
do{
712
ret = gnutls_handshake(session);
586
ret = gnutls_handshake (session);
713
587
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
714
if(ret < 0){
588
if (ret < 0){
715
589
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
716
gnutls_perror(ret);
590
gnutls_perror (ret);
717
591
retval = -1;
718
592
goto mandos_end;
719
593
}
722
596
fprintf(stderr, "Unknown error while reading data from"
723
597
" encrypted session with Mandos server\n");
724
598
retval = -1;
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
599
gnutls_bye (session, GNUTLS_SHUT_RDWR);
726
600
goto mandos_end;
727
601
}
728
602
} else {
729
buffer_length += (size_t) sret;
603
buffer_length += (size_t) ret;
730
604
}
731
605
}
732
606
734
608
fprintf(stderr, "Closing TLS session\n");
735
609
}
736
610
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
738
612
739
if(buffer_length > 0){
613
if (buffer_length > 0){
740
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
741
615
buffer_length,
742
&decrypted_buffer);
743
if(decrypted_buffer_size >= 0){
616
&decrypted_buffer,
617
keydir);
618
if (decrypted_buffer_size >= 0){
744
619
written = 0;
745
620
while(written < (size_t) decrypted_buffer_size){
746
ret = (int)fwrite(decrypted_buffer + written, 1,
747
(size_t)decrypted_buffer_size - written,
748
stdout);
621
ret = (int)fwrite (decrypted_buffer + written, 1,
622
(size_t)decrypted_buffer_size - written,
623
stdout);
749
624
if(ret == 0 and ferror(stdout)){
750
625
if(debug){
751
626
fprintf(stderr, "Error writing encrypted data: %s\n",
768
643
769
644
mandos_end:
770
645
free(buffer);
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
772
if(ret == -1){
773
perror("close");
774
}
775
gnutls_deinit(session);
646
close(tcp_sd);
647
gnutls_deinit (session);
776
648
return retval;
777
649
}
778
650
779
651
static void resolve_callback(AvahiSServiceResolver *r,
780
652
AvahiIfIndex interface,
781
AvahiProtocol proto,
653
AVAHI_GCC_UNUSED AvahiProtocol protocol,
782
654
AvahiResolverEvent event,
783
655
const char *name,
784
656
const char *type,
789
661
AVAHI_GCC_UNUSED AvahiStringList *txt,
790
662
AVAHI_GCC_UNUSED AvahiLookupResultFlags
791
663
flags,
792
AVAHI_GCC_UNUSED void* userdata){
664
void* userdata) {
665
mandos_context *mc = userdata;
793
666
assert(r);
794
667
795
668
/* Called whenever a service has been resolved successfully or
796
669
timed out */
797
670
798
switch(event){
671
switch (event) {
799
672
default:
800
673
case AVAHI_RESOLVER_FAILURE:
801
674
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
802
675
" of type '%s' in domain '%s': %s\n", name, type, domain,
803
avahi_strerror(avahi_server_errno(mc.server)));
676
avahi_strerror(avahi_server_errno(mc->server)));
804
677
break;
805
678
806
679
case AVAHI_RESOLVER_FOUND:
809
682
avahi_address_snprint(ip, sizeof(ip), address);
810
683
if(debug){
811
684
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
812
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
813
ip, (intmax_t)interface, port);
685
PRIu16 ") on port %d\n", name, host_name, ip,
686
interface, port);
814
687
}
815
int ret = start_mandos_communication(ip, port, interface,
816
avahi_proto_to_af(proto));
817
if(ret == 0){
818
avahi_simple_poll_quit(mc.simple_poll);
688
int ret = start_mandos_communication(ip, port, interface, mc);
689
if (ret == 0){
690
avahi_simple_poll_quit(mc->simple_poll);
819
691
}
820
692
}
821
693
}
822
694
avahi_s_service_resolver_free(r);
823
695
}
824
696
825
static void browse_callback(AvahiSServiceBrowser *b,
826
AvahiIfIndex interface,
827
AvahiProtocol protocol,
828
AvahiBrowserEvent event,
829
const char *name,
830
const char *type,
831
const char *domain,
832
AVAHI_GCC_UNUSED AvahiLookupResultFlags
833
flags,
834
AVAHI_GCC_UNUSED void* userdata){
697
static void browse_callback( AvahiSServiceBrowser *b,
698
AvahiIfIndex interface,
699
AvahiProtocol protocol,
700
AvahiBrowserEvent event,
701
const char *name,
702
const char *type,
703
const char *domain,
704
AVAHI_GCC_UNUSED AvahiLookupResultFlags
705
flags,
706
void* userdata) {
707
mandos_context *mc = userdata;
835
708
assert(b);
836
709
837
710
/* Called whenever a new services becomes available on the LAN or
838
711
is removed from the LAN */
839
712
840
switch(event){
713
switch (event) {
841
714
default:
842
715
case AVAHI_BROWSER_FAILURE:
843
716
844
717
fprintf(stderr, "(Avahi browser) %s\n",
845
avahi_strerror(avahi_server_errno(mc.server)));
846
avahi_simple_poll_quit(mc.simple_poll);
718
avahi_strerror(avahi_server_errno(mc->server)));
719
avahi_simple_poll_quit(mc->simple_poll);
847
720
return;
848
721
849
722
case AVAHI_BROWSER_NEW:
852
725
the callback function is called the Avahi server will free the
853
726
resolver for us. */
854
727
855
if(!(avahi_s_service_resolver_new(mc.server, interface,
728
if (!(avahi_s_service_resolver_new(mc->server, interface,
856
729
protocol, name, type, domain,
857
730
AVAHI_PROTO_INET6, 0,
858
resolve_callback, NULL)))
731
resolve_callback, mc)))
859
732
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
860
name, avahi_strerror(avahi_server_errno(mc.server)));
733
name, avahi_strerror(avahi_server_errno(mc->server)));
861
734
break;
862
735
863
736
case AVAHI_BROWSER_REMOVE:
872
745
}
873
746
}
874
747
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
878
if(quit_now){
879
return;
880
}
881
quit_now = 1;
882
int old_errno = errno;
883
if(mc.simple_poll != NULL){
884
avahi_simple_poll_quit(mc.simple_poll);
885
}
886
errno = old_errno;
748
/* Combines file name and path and returns the malloced new
749
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
751
char *tmp;
752
int ret = asprintf(&tmp, "%s/%s", first, second);
753
if(ret < 0){
754
return NULL;
755
}
756
return tmp;
887
757
}
888
758
759
889
760
int main(int argc, char *argv[]){
890
AvahiSServiceBrowser *sb = NULL;
891
int error;
892
int ret;
893
intmax_t tmpmax;
894
int numchars;
895
int exitcode = EXIT_SUCCESS;
896
const char *interface = "eth0";
897
struct ifreq network;
898
int sd;
899
uid_t uid;
900
gid_t gid;
901
char *connect_to = NULL;
902
char tempdir[] = "/tmp/mandosXXXXXX";
903
bool tempdir_created = false;
904
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
905
const char *seckey = PATHDIR "/" SECKEY;
906
const char *pubkey = PATHDIR "/" PUBKEY;
907
908
/* Initialize Mandos context */
909
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
910
.dh_bits = 1024, .priority = "SECURE256"
911
":!CTYPE-X.509:+CTYPE-OPENPGP" };
912
bool gnutls_initialized = false;
913
bool gpgme_initialized = false;
914
double delay = 2.5;
761
AvahiSServiceBrowser *sb = NULL;
762
int error;
763
int ret;
764
int exitcode = EXIT_SUCCESS;
765
const char *interface = "eth0";
766
struct ifreq network;
767
int sd;
768
uid_t uid;
769
gid_t gid;
770
char *connect_to = NULL;
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
777
.dh_bits = 1024, .priority = "SECURE256"};
778
bool gnutls_initalized = false;
779
780
{
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
785
.arg = "IP",
786
.doc = "Connect directly to a sepcified mandos server",
787
.group = 1 },
788
{ .name = "interface", .key = 'i',
789
.arg = "INTERFACE",
790
.doc = "Interface that Avahi will conntect through",
791
.group = 1 },
792
{ .name = "keydir", .key = 'd',
793
.arg = "KEYDIR",
794
.doc = "Directory where the openpgp keyring is",
795
.group = 1 },
796
{ .name = "seckey", .key = 's',
797
.arg = "SECKEY",
798
.doc = "Secret openpgp key for gnutls authentication",
799
.group = 1 },
800
{ .name = "pubkey", .key = 'p',
801
.arg = "PUBKEY",
802
.doc = "Public openpgp key for gnutls authentication",
803
.group = 2 },
804
{ .name = "dh-bits", .key = 129,
805
.arg = "BITS",
806
.doc = "dh-bits to use in gnutls communication",
807
.group = 2 },
808
{ .name = "priority", .key = 130,
809
.arg = "PRIORITY",
810
.doc = "GNUTLS priority", .group = 1 },
811
{ .name = NULL }
812
};
915
813
916
struct sigaction old_sigterm_action;
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
918
919
{
920
struct argp_option options[] = {
921
{ .name = "debug", .key = 128,
922
.doc = "Debug mode", .group = 3 },
923
{ .name = "connect", .key = 'c',
924
.arg = "ADDRESS:PORT",
925
.doc = "Connect directly to a specific Mandos server",
926
.group = 1 },
927
{ .name = "interface", .key = 'i',
928
.arg = "NAME",
929
.doc = "Network interface that will be used to search for"
930
" Mandos servers",
931
.group = 1 },
932
{ .name = "seckey", .key = 's',
933
.arg = "FILE",
934
.doc = "OpenPGP secret key file base name",
935
.group = 1 },
936
{ .name = "pubkey", .key = 'p',
937
.arg = "FILE",
938
.doc = "OpenPGP public key file base name",
939
.group = 2 },
940
{ .name = "dh-bits", .key = 129,
941
.arg = "BITS",
942
.doc = "Bit length of the prime number used in the"
943
" Diffie-Hellman key exchange",
944
.group = 2 },
945
{ .name = "priority", .key = 130,
946
.arg = "STRING",
947
.doc = "GnuTLS priority string for the TLS handshake",
948
.group = 1 },
949
{ .name = "delay", .key = 131,
950
.arg = "SECONDS",
951
.doc = "Maximum delay to wait for interface startup",
952
.group = 2 },
953
{ .name = NULL }
954
};
955
956
error_t parse_opt(int key, char *arg,
957
struct argp_state *state){
958
switch(key){
959
case 128: /* --debug */
960
debug = true;
961
break;
962
case 'c': /* --connect */
963
connect_to = arg;
964
break;
965
case 'i': /* --interface */
966
interface = arg;
967
break;
968
case 's': /* --seckey */
969
seckey = arg;
970
break;
971
case 'p': /* --pubkey */
972
pubkey = arg;
973
break;
974
case 129: /* --dh-bits */
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
978
fprintf(stderr, "Bad number of DH bits\n");
979
exit(EXIT_FAILURE);
980
}
981
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
982
break;
983
case 130: /* --priority */
984
mc.priority = arg;
985
break;
986
case 131: /* --delay */
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
991
}
992
break;
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
996
break;
997
default:
998
return ARGP_ERR_UNKNOWN;
999
}
1000
return 0;
1001
}
1002
1003
struct argp argp = { .options = options, .parser = parse_opt,
1004
.args_doc = "",
1005
.doc = "Mandos client -- Get and decrypt"
1006
" passwords from a Mandos server" };
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
}
1014
1015
/* If the interface is down, bring it up */
1016
if(interface[0] != '\0'){
1017
#ifdef __linux__
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1019
messages to mess up the prompt */
1020
ret = klogctl(8, NULL, 5);
1021
bool restore_loglevel = true;
1022
if(ret == -1){
1023
restore_loglevel = false;
1024
perror("klogctl");
1025
}
1026
#endif /* __linux__ */
1027
1028
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1029
if(sd < 0){
1030
perror("socket");
1031
exitcode = EXIT_FAILURE;
1032
#ifdef __linux__
1033
if(restore_loglevel){
1034
ret = klogctl(7, NULL, 0);
1035
if(ret == -1){
1036
perror("klogctl");
1037
}
1038
}
1039
#endif /* __linux__ */
1040
goto end;
1041
}
1042
strcpy(network.ifr_name, interface);
1043
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1044
if(ret == -1){
1045
perror("ioctl SIOCGIFFLAGS");
1046
#ifdef __linux__
1047
if(restore_loglevel){
1048
ret = klogctl(7, NULL, 0);
1049
if(ret == -1){
1050
perror("klogctl");
1051
}
1052
}
1053
#endif /* __linux__ */
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
if((network.ifr_flags & IFF_UP) == 0){
1058
network.ifr_flags |= IFF_UP;
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1060
if(ret == -1){
1061
perror("ioctl SIOCSIFFLAGS");
1062
exitcode = EXIT_FAILURE;
1063
#ifdef __linux__
1064
if(restore_loglevel){
1065
ret = klogctl(7, NULL, 0);
1066
if(ret == -1){
1067
perror("klogctl");
814
815
error_t parse_opt (int key, char *arg,
816
struct argp_state *state) {
817
/* Get the INPUT argument from `argp_parse', which we know is
818
a pointer to our plugin list pointer. */
819
switch (key) {
820
case 128:
821
debug = true;
822
break;
823
case 'c':
824
connect_to = arg;
825
break;
826
case 'i':
827
interface = arg;
828
break;
829
case 'd':
830
keydir = arg;
831
break;
832
case 's':
833
seckeyname = arg;
834
break;
835
case 'p':
836
pubkeyname = arg;
837
break;
838
case 129:
839
errno = 0;
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
841
if (errno){
842
perror("strtol");
843
exit(EXIT_FAILURE);
1068
844
}
845
break;
846
case 130:
847
mc.priority = arg;
848
break;
849
case ARGP_KEY_ARG:
850
argp_usage (state);
851
case ARGP_KEY_END:
852
break;
853
default:
854
return ARGP_ERR_UNKNOWN;
1069
855
}
1070
#endif /* __linux__ */
1071
goto end;
1072
}
1073
}
1074
/* sleep checking until interface is running */
1075
for(int i=0; i < delay * 4; i++){
856
return 0;
857
}
858
859
struct argp argp = { .options = options, .parser = parse_opt,
860
.args_doc = "",
861
.doc = "Mandos client -- Get and decrypt"
862
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
866
exitcode = EXIT_FAILURE;
867
goto end;
868
}
869
}
870
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
875
goto end;
876
}
877
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
882
goto end;
883
}
884
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
886
if (ret == -1){
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
889
goto end;
890
} else {
891
gnutls_initalized = true;
892
}
893
894
/* If the interface is down, bring it up */
895
{
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
897
if(sd < 0) {
898
perror("socket");
899
exitcode = EXIT_FAILURE;
900
goto end;
901
}
902
strcpy(network.ifr_name, interface);
1076
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1077
904
if(ret == -1){
1078
905
perror("ioctl SIOCGIFFLAGS");
1079
} else if(network.ifr_flags & IFF_RUNNING){
1080
break;
1081
}
1082
struct timespec sleeptime = { .tv_nsec = 250000000 };
1083
ret = nanosleep(&sleeptime, NULL);
1084
if(ret == -1 and errno != EINTR){
1085
perror("nanosleep");
1086
}
1087
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1091
}
1092
#ifdef __linux__
1093
if(restore_loglevel){
1094
/* Restores kernel loglevel to default */
1095
ret = klogctl(7, NULL, 0);
1096
if(ret == -1){
1097
perror("klogctl");
1098
}
1099
}
1100
#endif /* __linux__ */
1101
}
1102
1103
uid = getuid();
1104
gid = getgid();
1105
1106
errno = 0;
1107
setgid(gid);
1108
if(ret == -1){
1109
perror("setgid");
1110
}
1111
1112
ret = setuid(uid);
1113
if(ret == -1){
1114
perror("setuid");
1115
}
1116
1117
ret = init_gnutls_global(pubkey, seckey);
1118
if(ret == -1){
1119
fprintf(stderr, "init_gnutls_global failed\n");
1120
exitcode = EXIT_FAILURE;
1121
goto end;
1122
} else {
1123
gnutls_initialized = true;
1124
}
1125
1126
if(mkdtemp(tempdir) == NULL){
1127
perror("mkdtemp");
1128
goto end;
1129
}
1130
tempdir_created = true;
1131
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1133
fprintf(stderr, "init_gpgme failed\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
} else {
1137
gpgme_initialized = true;
1138
}
1139
1140
if(interface[0] != '\0'){
906
exitcode = EXIT_FAILURE;
907
goto end;
908
}
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
912
if(ret == -1){
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
close(sd);
919
}
920
921
uid = getuid();
922
gid = getgid();
923
924
ret = setuid(uid);
925
if (ret == -1){
926
perror("setuid");
927
}
928
929
setgid(gid);
930
if (ret == -1){
931
perror("setgid");
932
}
933
1141
934
if_index = (AvahiIfIndex) if_nametoindex(interface);
1142
935
if(if_index == 0){
1143
936
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
}
1148
1149
if(connect_to != NULL){
1150
/* Connect directly, do not use Zeroconf */
1151
/* (Mainly meant for debugging) */
1152
char *address = strrchr(connect_to, ':');
1153
if(address == NULL){
1154
fprintf(stderr, "No colon in address\n");
1155
exitcode = EXIT_FAILURE;
1156
goto end;
1157
}
1158
uint16_t port;
1159
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1160
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1161
or address[numchars+1] != '\0'){
1162
fprintf(stderr, "Bad port number\n");
1163
exitcode = EXIT_FAILURE;
1164
goto end;
1165
}
1166
port = (uint16_t)tmpmax;
1167
*address = '\0';
1168
address = connect_to;
1169
/* Colon in address indicates IPv6 */
1170
int af;
1171
if(strchr(address, ':') != NULL){
1172
af = AF_INET6;
1173
} else {
1174
af = AF_INET;
1175
}
1176
ret = start_mandos_communication(address, port, if_index, af);
1177
if(ret < 0){
1178
exitcode = EXIT_FAILURE;
1179
} else {
1180
exitcode = EXIT_SUCCESS;
1181
}
1182
goto end;
1183
}
1184
1185
if(not debug){
1186
avahi_set_log_function(empty_log);
1187
}
1188
1189
/* Initialize the pseudo-RNG for Avahi */
1190
srand((unsigned int) time(NULL));
1191
1192
/* Allocate main Avahi loop object */
1193
mc.simple_poll = avahi_simple_poll_new();
1194
if(mc.simple_poll == NULL){
1195
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
1200
{
1201
AvahiServerConfig config;
1202
/* Do not publish any local Zeroconf records */
1203
avahi_server_config_init(&config);
1204
config.publish_hinfo = 0;
1205
config.publish_addresses = 0;
1206
config.publish_workstation = 0;
1207
config.publish_domain = 0;
1208
1209
/* Allocate a new server */
1210
mc.server = avahi_server_new(avahi_simple_poll_get
1211
(mc.simple_poll), &config, NULL,
1212
NULL, &error);
1213
1214
/* Free the Avahi configuration data */
1215
avahi_server_config_free(&config);
1216
}
1217
1218
/* Check if creating the Avahi server object succeeded */
1219
if(mc.server == NULL){
1220
fprintf(stderr, "Failed to create Avahi server: %s\n",
1221
avahi_strerror(error));
1222
exitcode = EXIT_FAILURE;
1223
goto end;
1224
}
1225
1226
/* Create the Avahi service browser */
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1229
NULL, 0, browse_callback, NULL);
1230
if(sb == NULL){
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1232
avahi_strerror(avahi_server_errno(mc.server)));
1233
exitcode = EXIT_FAILURE;
1234
goto end;
1235
}
1236
1237
sigemptyset(&sigterm_action.sa_mask);
1238
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1239
if(ret == -1){
1240
perror("sigaddset");
1241
exitcode = EXIT_FAILURE;
1242
goto end;
1243
}
1244
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1245
if(ret == -1){
1246
perror("sigaddset");
1247
exitcode = EXIT_FAILURE;
1248
goto end;
1249
}
1250
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1251
if(ret == -1){
1252
perror("sigaddset");
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1257
if(ret == -1){
1258
perror("sigaction");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
/* Run the main loop */
1264
1265
if(debug){
1266
fprintf(stderr, "Starting Avahi loop search\n");
1267
}
1268
1269
avahi_simple_poll_loop(mc.simple_poll);
1270
937
exit(EXIT_FAILURE);
938
}
939
940
if(connect_to != NULL){
941
/* Connect directly, do not use Zeroconf */
942
/* (Mainly meant for debugging) */
943
char *address = strrchr(connect_to, ':');
944
if(address == NULL){
945
fprintf(stderr, "No colon in address\n");
946
exitcode = EXIT_FAILURE;
947
goto end;
948
}
949
errno = 0;
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
951
if(errno){
952
perror("Bad port number");
953
exitcode = EXIT_FAILURE;
954
goto end;
955
}
956
*address = '\0';
957
address = connect_to;
958
ret = start_mandos_communication(address, port, if_index, &mc);
959
if(ret < 0){
960
exitcode = EXIT_FAILURE;
961
} else {
962
exitcode = EXIT_SUCCESS;
963
}
964
goto end;
965
}
966
967
if (not debug){
968
avahi_set_log_function(empty_log);
969
}
970
971
/* Initialize the pseudo-RNG for Avahi */
972
srand((unsigned int) time(NULL));
973
974
/* Allocate main Avahi loop object */
975
mc.simple_poll = avahi_simple_poll_new();
976
if (mc.simple_poll == NULL) {
977
fprintf(stderr, "Avahi: Failed to create simple poll"
978
" object.\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
983
{
984
AvahiServerConfig config;
985
/* Do not publish any local Zeroconf records */
986
avahi_server_config_init(&config);
987
config.publish_hinfo = 0;
988
config.publish_addresses = 0;
989
config.publish_workstation = 0;
990
config.publish_domain = 0;
991
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
995
NULL, &error);
996
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
999
}
1000
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
1004
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
1006
goto end;
1007
}
1008
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
1011
AVAHI_PROTO_INET6,
1012
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
1014
if (sb == NULL) {
1015
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
1018
goto end;
1019
}
1020
1021
/* Run the main loop */
1022
1023
if (debug){
1024
fprintf(stderr, "Starting Avahi loop search\n");
1025
}
1026
1027
avahi_simple_poll_loop(mc.simple_poll);
1028
1271
1029
end:
1272
1273
if(debug){
1274
fprintf(stderr, "%s exiting\n", argv[0]);
1275
}
1276
1277
/* Cleanup things */
1278
if(sb != NULL)
1279
avahi_s_service_browser_free(sb);
1280
1281
if(mc.server != NULL)
1282
avahi_server_free(mc.server);
1283
1284
if(mc.simple_poll != NULL)
1285
avahi_simple_poll_free(mc.simple_poll);
1286
1287
if(gnutls_initialized){
1288
gnutls_certificate_free_credentials(mc.cred);
1289
gnutls_global_deinit();
1290
gnutls_dh_params_deinit(mc.dh_params);
1291
}
1292
1293
if(gpgme_initialized){
1294
gpgme_release(mc.ctx);
1295
}
1296
1297
/* Removes the temp directory used by GPGME */
1298
if(tempdir_created){
1299
DIR *d;
1300
struct dirent *direntry;
1301
d = opendir(tempdir);
1302
if(d == NULL){
1303
if(errno != ENOENT){
1304
perror("opendir");
1305
}
1306
} else {
1307
while(true){
1308
direntry = readdir(d);
1309
if(direntry == NULL){
1310
break;
1311
}
1312
/* Skip "." and ".." */
1313
if(direntry->d_name[0] == '.'
1314
and (direntry->d_name[1] == '\0'
1315
or (direntry->d_name[1] == '.'
1316
and direntry->d_name[2] == '\0'))){
1317
continue;
1318
}
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", tempdir,
1321
direntry->d_name);
1322
if(ret < 0){
1323
perror("asprintf");
1324
continue;
1325
}
1326
ret = remove(fullname);
1327
if(ret == -1){
1328
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1329
strerror(errno));
1330
}
1331
free(fullname);
1332
}
1333
closedir(d);
1334
}
1335
ret = rmdir(tempdir);
1336
if(ret == -1 and errno != ENOENT){
1337
perror("rmdir");
1338
}
1339
}
1340
1341
return exitcode;
1030
1031
if (debug){
1032
fprintf(stderr, "%s exiting\n", argv[0]);
1033
}
1034
1035
/* Cleanup things */
1036
if (sb != NULL)
1037
avahi_s_service_browser_free(sb);
1038
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
1041
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1046
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1050
}
1051
1052
return exitcode;
1342
1053
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0