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- Committer: Björn Påhlsson
- Date: 2008-08-10 00:07:24 UTC
- mfrom: (56 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 58.
- Revision ID: belorn@braxen-20080810000724-zm9y5iasq9iujuo5
synopsis changed
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- 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
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
35
34
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
37
36
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
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
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
45
strerror(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
48
IFF_UP */
49
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
53
#include <sys/stat.h> /* open() */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t */
54
53
#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 */
54
struct in6_addr, inet_pton(),
55
connect() */
60
56
#include <assert.h> /* assert() */
61
57
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
58
#include <time.h> /* time() */
63
59
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
60
SIOCSIFFLAGS, if_indextoname(),
65
61
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
69
62
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
63
getuid(), getgid(), setuid(),
71
64
setgid() */
65
#include <netinet/in.h>
72
66
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
67
#include <iso646.h> /* not, and */
74
68
#include <argp.h> /* struct argp_option, error_t, struct
75
69
argp_state, struct argp,
76
70
argp_parse(), ARGP_KEY_ARG,
77
71
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
81
72
82
73
/* Avahi */
83
74
/* All Avahi types, constants and functions
91
82
#include <avahi-common/error.h>
92
83
93
84
/* GnuTLS */
94
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
95
functions:
85
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
96
86
gnutls_*
97
87
init_gnutls_session(),
98
88
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
101
90
GNUTLS_OPENPGP_FMT_BASE64 */
102
91
103
92
/* GPGME */
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
93
#include <gpgme.h> /* All GPGME types, constants and functions
106
94
gpgme_*
107
95
GPGME_PROTOCOL_OpenPGP,
108
96
GPG_ERR_NO_* */
109
97
110
98
#define BUFFER_SIZE 256
111
99
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
115
116
100
bool debug = false;
101
static const char *keydir = "/conf/conf.d/mandos";
117
102
static const char mandos_protocol_version[] = "1";
118
const char *argp_program_version = "mandos-client " VERSION;
103
const char *argp_program_version = "mandosclient 0.9";
119
104
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
120
105
121
106
/* Used for passing in values through the Avahi callback functions */
126
111
unsigned int dh_bits;
127
112
gnutls_dh_params_t dh_params;
128
113
const char *priority;
129
gpgme_ctx_t ctx;
130
114
} mandos_context;
131
115
132
116
/*
136
120
*/
137
121
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
122
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
123
if (buffer_length + BUFFER_SIZE > buffer_capacity){
140
124
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
125
if (buffer == NULL){
142
126
return 0;
143
127
}
144
128
buffer_capacity += BUFFER_SIZE;
147
131
}
148
132
149
133
/*
150
* Initialize GPGME.
134
* Decrypt OpenPGP data using keyrings in HOMEDIR.
135
* Returns -1 on error
151
136
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
137
static ssize_t pgp_packet_decrypt (const char *cryptotext,
138
size_t crypto_size,
139
char **plaintext,
140
const char *homedir){
141
gpgme_data_t dh_crypto, dh_plain;
142
gpgme_ctx_t ctx;
155
143
gpgme_error_t rc;
144
ssize_t ret;
145
size_t plaintext_capacity = 0;
146
ssize_t plaintext_length = 0;
156
147
gpgme_engine_info_t engine_info;
157
148
158
159
/*
160
* Helper function to insert pub and seckey to the engine keyring.
161
*/
162
bool import_key(const char *filename){
163
int fd;
164
gpgme_data_t pgp_data;
165
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
if(fd == -1){
168
perror("open");
169
return false;
170
}
171
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
187
if(ret == -1){
188
perror("close");
189
}
190
gpgme_data_release(pgp_data);
191
return true;
192
}
193
194
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
149
if (debug){
150
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
196
151
}
197
152
198
153
/* Init GPGME */
199
154
gpgme_check_version(NULL);
200
155
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
156
if (rc != GPG_ERR_NO_ERROR){
202
157
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
158
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
159
return -1;
205
160
}
206
161
207
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
162
/* Set GPGME home directory for the OpenPGP engine only */
163
rc = gpgme_get_engine_info (&engine_info);
164
if (rc != GPG_ERR_NO_ERROR){
210
165
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
166
gpgme_strsource(rc), gpgme_strerror(rc));
212
return false;
167
return -1;
213
168
}
214
169
while(engine_info != NULL){
215
170
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
216
171
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
217
engine_info->file_name, tempdir);
172
engine_info->file_name, homedir);
218
173
break;
219
174
}
220
175
engine_info = engine_info->next;
221
176
}
222
177
if(engine_info == NULL){
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
224
return false;
225
}
226
227
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
232
return false;
233
}
234
235
if(not import_key(pubkey) or not import_key(seckey)){
236
return false;
237
}
238
239
return true;
240
}
241
242
/*
243
* Decrypt OpenPGP data.
244
* Returns -1 on error
245
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
250
gpgme_data_t dh_crypto, dh_plain;
251
gpgme_error_t rc;
252
ssize_t ret;
253
size_t plaintext_capacity = 0;
254
ssize_t plaintext_length = 0;
255
256
if(debug){
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
178
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
179
return -1;
258
180
}
259
181
260
182
/* Create new GPGME data buffer from memory cryptotext */
261
183
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
184
0);
263
if(rc != GPG_ERR_NO_ERROR){
185
if (rc != GPG_ERR_NO_ERROR){
264
186
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
187
gpgme_strsource(rc), gpgme_strerror(rc));
266
188
return -1;
268
190
269
191
/* Create new empty GPGME data buffer for the plaintext */
270
192
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
193
if (rc != GPG_ERR_NO_ERROR){
272
194
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
195
gpgme_strsource(rc), gpgme_strerror(rc));
274
196
gpgme_data_release(dh_crypto);
275
197
return -1;
276
198
}
277
199
200
/* Create new GPGME "context" */
201
rc = gpgme_new(&ctx);
202
if (rc != GPG_ERR_NO_ERROR){
203
fprintf(stderr, "bad gpgme_new: %s: %s\n",
204
gpgme_strsource(rc), gpgme_strerror(rc));
205
plaintext_length = -1;
206
goto decrypt_end;
207
}
208
278
209
/* Decrypt data from the cryptotext data buffer to the plaintext
279
210
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
211
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
212
if (rc != GPG_ERR_NO_ERROR){
282
213
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
214
gpgme_strsource(rc), gpgme_strerror(rc));
284
215
plaintext_length = -1;
285
if(debug){
286
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
} else {
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
295
if(result->file_name != NULL){
296
fprintf(stderr, "File name: %s\n", result->file_name);
297
}
298
gpgme_recipient_t recipient;
299
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
310
}
311
}
312
}
313
216
goto decrypt_end;
314
217
}
315
218
317
220
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
318
221
}
319
222
223
if (debug){
224
gpgme_decrypt_result_t result;
225
result = gpgme_op_decrypt_result(ctx);
226
if (result == NULL){
227
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
228
} else {
229
fprintf(stderr, "Unsupported algorithm: %s\n",
230
result->unsupported_algorithm);
231
fprintf(stderr, "Wrong key usage: %d\n",
232
result->wrong_key_usage);
233
if(result->file_name != NULL){
234
fprintf(stderr, "File name: %s\n", result->file_name);
235
}
236
gpgme_recipient_t recipient;
237
recipient = result->recipients;
238
if(recipient){
239
while(recipient != NULL){
240
fprintf(stderr, "Public key algorithm: %s\n",
241
gpgme_pubkey_algo_name(recipient->pubkey_algo));
242
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
243
fprintf(stderr, "Secret key available: %s\n",
244
recipient->status == GPG_ERR_NO_SECKEY
245
? "No" : "Yes");
246
recipient = recipient->next;
247
}
248
}
249
}
250
}
251
320
252
/* Seek back to the beginning of the GPGME plaintext data buffer */
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
253
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
perror("pgpme_data_seek");
323
255
plaintext_length = -1;
324
256
goto decrypt_end;
325
257
}
329
261
plaintext_capacity = adjustbuffer(plaintext,
330
262
(size_t)plaintext_length,
331
263
plaintext_capacity);
332
if(plaintext_capacity == 0){
264
if (plaintext_capacity == 0){
333
265
perror("adjustbuffer");
334
266
plaintext_length = -1;
335
267
goto decrypt_end;
338
270
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
339
271
BUFFER_SIZE);
340
272
/* Print the data, if any */
341
if(ret == 0){
273
if (ret == 0){
342
274
/* EOF */
343
275
break;
344
276
}
349
281
}
350
282
plaintext_length += ret;
351
283
}
352
284
353
285
if(debug){
354
286
fprintf(stderr, "Decrypted password is: ");
355
287
for(ssize_t i = 0; i < plaintext_length; i++){
368
300
return plaintext_length;
369
301
}
370
302
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
303
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value);
305
if (ret == NULL)
375
306
ret = "(unknown)";
376
307
return ret;
377
308
}
383
314
}
384
315
385
316
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
317
const char *pubkeyfile,
318
const char *seckeyfile){
388
319
int ret;
389
320
390
321
if(debug){
392
323
}
393
324
394
325
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
326
if (ret != GNUTLS_E_SUCCESS) {
327
fprintf (stderr, "GnuTLS global_init: %s\n",
328
safer_gnutls_strerror(ret));
398
329
return -1;
399
330
}
400
331
401
if(debug){
332
if (debug){
402
333
/* "Use a log level over 10 to enable all debugging options."
403
334
* - GnuTLS manual
404
335
*/
408
339
409
340
/* OpenPGP credentials */
410
341
gnutls_certificate_allocate_credentials(&mc->cred);
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
from
414
-Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n",
344
safer_gnutls_strerror(ret));
345
gnutls_global_deinit ();
418
346
return -1;
419
347
}
420
348
421
349
if(debug){
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
350
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
351
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
352
seckeyfile);
425
353
}
426
354
427
355
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
356
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
357
if (ret != GNUTLS_E_SUCCESS) {
431
358
fprintf(stderr,
432
359
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
360
" '%s')\n", ret, pubkeyfile, seckeyfile);
361
fprintf(stdout, "The GnuTLS error is: %s\n",
435
362
safer_gnutls_strerror(ret));
436
363
goto globalfail;
437
364
}
438
365
439
366
/* GnuTLS server initialization */
440
367
ret = gnutls_dh_params_init(&mc->dh_params);
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
368
if (ret != GNUTLS_E_SUCCESS) {
369
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
370
" %s\n", safer_gnutls_strerror(ret));
444
371
goto globalfail;
445
372
}
446
373
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
374
if (ret != GNUTLS_E_SUCCESS) {
375
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
376
safer_gnutls_strerror(ret));
450
377
goto globalfail;
451
378
}
452
379
453
380
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
454
381
455
382
return 0;
456
383
457
384
globalfail:
458
385
459
386
gnutls_certificate_free_credentials(mc->cred);
460
387
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
462
388
return -1;
389
463
390
}
464
391
465
392
static int init_gnutls_session(mandos_context *mc,
467
394
int ret;
468
395
/* GnuTLS session creation */
469
396
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
397
if (ret != GNUTLS_E_SUCCESS){
471
398
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
399
safer_gnutls_strerror(ret));
473
400
}
475
402
{
476
403
const char *err;
477
404
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
405
if (ret != GNUTLS_E_SUCCESS) {
479
406
fprintf(stderr, "Syntax error at: %s\n", err);
480
407
fprintf(stderr, "GnuTLS error: %s\n",
481
408
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
409
gnutls_deinit (*session);
483
410
return -1;
484
411
}
485
412
}
486
413
487
414
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
415
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
416
if (ret != GNUTLS_E_SUCCESS) {
490
417
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
418
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
419
gnutls_deinit (*session);
493
420
return -1;
494
421
}
495
422
496
423
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
424
gnutls_certificate_server_set_request (*session,
425
GNUTLS_CERT_IGNORE);
499
426
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
427
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
428
502
429
return 0;
503
430
}
509
436
/* Called when a Mandos server is found */
510
437
static int start_mandos_communication(const char *ip, uint16_t port,
511
438
AvahiIfIndex if_index,
512
mandos_context *mc, int af){
439
mandos_context *mc){
513
440
int ret, tcp_sd;
514
ssize_t sret;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
441
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
519
442
char *buffer = NULL;
520
443
char *decrypted_buffer;
521
444
size_t buffer_length = 0;
523
446
ssize_t decrypted_buffer_size;
524
447
size_t written;
525
448
int retval = 0;
449
char interface[IF_NAMESIZE];
526
450
gnutls_session_t session;
527
int pf; /* Protocol family */
528
529
switch(af){
530
case AF_INET6:
531
pf = PF_INET6;
532
break;
533
case AF_INET:
534
pf = PF_INET;
535
break;
536
default:
537
fprintf(stderr, "Bad address family: %d\n", af);
538
return -1;
539
}
540
541
ret = init_gnutls_session(mc, &session);
542
if(ret != 0){
451
452
ret = init_gnutls_session (mc, &session);
453
if (ret != 0){
543
454
return -1;
544
455
}
545
456
546
457
if(debug){
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
548
"\n", ip, port);
458
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
459
ip, port);
549
460
}
550
461
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
462
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
463
if(tcp_sd < 0) {
553
464
perror("socket");
554
465
return -1;
555
466
}
467
468
if(debug){
469
if(if_indextoname((unsigned int)if_index, interface) == NULL){
470
perror("if_indextoname");
471
return -1;
472
}
473
fprintf(stderr, "Binding to interface %s\n", interface);
474
}
556
475
557
memset(&to, 0, sizeof(to));
558
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
560
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
} else { /* IPv4 */
562
to.in.sin_family = (sa_family_t)af;
563
ret = inet_pton(af, ip, &to.in.sin_addr);
564
}
565
if(ret < 0 ){
476
memset(&to,0,sizeof(to)); /* Spurious warning */
477
to.in6.sin6_family = AF_INET6;
478
/* It would be nice to have a way to detect if we were passed an
479
IPv4 address here. Now we assume an IPv6 address. */
480
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
481
if (ret < 0 ){
566
482
perror("inet_pton");
567
483
return -1;
568
484
}
570
486
fprintf(stderr, "Bad address: %s\n", ip);
571
487
return -1;
572
488
}
573
if(af == AF_INET6){
574
to.in6.sin6_port = htons(port); /* Spurious warnings from
575
-Wconversion and
576
-Wunreachable-code */
577
578
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
579
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
580
-Wunreachable-code*/
581
if(if_index == AVAHI_IF_UNSPEC){
582
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
" without a network interface\n");
584
return -1;
585
}
586
/* Set the network interface number as scope */
587
to.in6.sin6_scope_id = (uint32_t)if_index;
588
}
589
} else {
590
to.in.sin_port = htons(port); /* Spurious warnings from
591
-Wconversion and
592
-Wunreachable-code */
593
}
489
to.in6.sin6_port = htons(port); /* Spurious warning */
490
491
to.in6.sin6_scope_id = (uint32_t)if_index;
594
492
595
493
if(debug){
596
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
char interface[IF_NAMESIZE];
598
if(if_indextoname((unsigned int)if_index, interface) == NULL){
599
perror("if_indextoname");
600
} else {
601
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
602
ip, interface, port);
603
}
604
} else {
605
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
606
port);
607
}
608
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
609
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
610
const char *pcret;
611
if(af == AF_INET6){
612
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
613
sizeof(addrstr));
614
} else {
615
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
616
sizeof(addrstr));
617
}
618
if(pcret == NULL){
494
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
495
char addrstr[INET6_ADDRSTRLEN] = "";
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
497
sizeof(addrstr)) == NULL){
619
498
perror("inet_ntop");
620
499
} else {
621
500
if(strcmp(addrstr, ip) != 0){
624
503
}
625
504
}
626
505
627
if(af == AF_INET6){
628
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
} else {
630
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
631
}
632
if(ret < 0){
506
ret = connect(tcp_sd, &to.in, sizeof(to));
507
if (ret < 0){
633
508
perror("connect");
634
509
return -1;
635
510
}
636
511
637
512
const char *out = mandos_protocol_version;
638
513
written = 0;
639
while(true){
514
while (true){
640
515
size_t out_size = strlen(out);
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
517
out_size - written));
643
if(ret == -1){
518
if (ret == -1){
644
519
perror("write");
645
520
retval = -1;
646
521
goto mandos_end;
649
524
if(written < out_size){
650
525
continue;
651
526
} else {
652
if(out == mandos_protocol_version){
527
if (out == mandos_protocol_version){
653
528
written = 0;
654
529
out = "\r\n";
655
530
} else {
657
532
}
658
533
}
659
534
}
660
535
661
536
if(debug){
662
537
fprintf(stderr, "Establishing TLS session with %s\n", ip);
663
538
}
664
539
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
666
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
541
667
542
do{
668
ret = gnutls_handshake(session);
543
ret = gnutls_handshake (session);
669
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
670
545
671
if(ret != GNUTLS_E_SUCCESS){
546
if (ret != GNUTLS_E_SUCCESS){
672
547
if(debug){
673
548
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
674
gnutls_perror(ret);
549
gnutls_perror (ret);
675
550
}
676
551
retval = -1;
677
552
goto mandos_end;
680
555
/* Read OpenPGP packet that contains the wanted password */
681
556
682
557
if(debug){
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
558
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
559
ip);
685
560
}
686
561
687
562
while(true){
688
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
564
buffer_capacity);
690
if(buffer_capacity == 0){
565
if (buffer_capacity == 0){
691
566
perror("adjustbuffer");
692
567
retval = -1;
693
568
goto mandos_end;
694
569
}
695
570
696
sret = gnutls_record_recv(session, buffer+buffer_length,
697
BUFFER_SIZE);
698
if(sret == 0){
571
ret = gnutls_record_recv(session, buffer+buffer_length,
572
BUFFER_SIZE);
573
if (ret == 0){
699
574
break;
700
575
}
701
if(sret < 0){
702
switch(sret){
576
if (ret < 0){
577
switch(ret){
703
578
case GNUTLS_E_INTERRUPTED:
704
579
case GNUTLS_E_AGAIN:
705
580
break;
706
581
case GNUTLS_E_REHANDSHAKE:
707
582
do{
708
ret = gnutls_handshake(session);
583
ret = gnutls_handshake (session);
709
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
710
if(ret < 0){
585
if (ret < 0){
711
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
712
gnutls_perror(ret);
587
gnutls_perror (ret);
713
588
retval = -1;
714
589
goto mandos_end;
715
590
}
718
593
fprintf(stderr, "Unknown error while reading data from"
719
594
" encrypted session with Mandos server\n");
720
595
retval = -1;
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
596
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
597
goto mandos_end;
723
598
}
724
599
} else {
725
buffer_length += (size_t) sret;
600
buffer_length += (size_t) ret;
726
601
}
727
602
}
728
603
730
605
fprintf(stderr, "Closing TLS session\n");
731
606
}
732
607
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
609
735
if(buffer_length > 0){
736
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
610
if (buffer_length > 0){
611
decrypted_buffer_size = pgp_packet_decrypt(buffer,
737
612
buffer_length,
738
&decrypted_buffer);
739
if(decrypted_buffer_size >= 0){
613
&decrypted_buffer,
614
keydir);
615
if (decrypted_buffer_size >= 0){
740
616
written = 0;
741
617
while(written < (size_t) decrypted_buffer_size){
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
618
ret = (int)fwrite (decrypted_buffer + written, 1,
619
(size_t)decrypted_buffer_size - written,
620
stdout);
745
621
if(ret == 0 and ferror(stdout)){
746
622
if(debug){
747
623
fprintf(stderr, "Error writing encrypted data: %s\n",
756
632
} else {
757
633
retval = -1;
758
634
}
759
} else {
760
retval = -1;
761
635
}
762
636
763
637
/* Shutdown procedure */
764
638
765
639
mandos_end:
766
640
free(buffer);
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
768
if(ret == -1){
769
perror("close");
770
}
771
gnutls_deinit(session);
641
close(tcp_sd);
642
gnutls_deinit (session);
772
643
return retval;
773
644
}
774
645
775
646
static void resolve_callback(AvahiSServiceResolver *r,
776
647
AvahiIfIndex interface,
777
AvahiProtocol proto,
648
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
649
AvahiResolverEvent event,
779
650
const char *name,
780
651
const char *type,
785
656
AVAHI_GCC_UNUSED AvahiStringList *txt,
786
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
787
658
flags,
788
void* userdata){
659
void* userdata) {
789
660
mandos_context *mc = userdata;
790
assert(r);
661
assert(r); /* Spurious warning */
791
662
792
663
/* Called whenever a service has been resolved successfully or
793
664
timed out */
794
665
795
switch(event){
666
switch (event) {
796
667
default:
797
668
case AVAHI_RESOLVER_FAILURE:
798
669
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
805
676
char ip[AVAHI_ADDRESS_STR_MAX];
806
677
avahi_address_snprint(ip, sizeof(ip), address);
807
678
if(debug){
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
679
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
680
" port %d\n", name, host_name, ip, interface, port);
811
681
}
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
815
avahi_simple_poll_quit(mc->simple_poll);
682
int ret = start_mandos_communication(ip, port, interface, mc);
683
if (ret == 0){
684
exit(EXIT_SUCCESS);
816
685
}
817
686
}
818
687
}
819
688
avahi_s_service_resolver_free(r);
820
689
}
821
690
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
void* userdata){
691
static void browse_callback( AvahiSServiceBrowser *b,
692
AvahiIfIndex interface,
693
AvahiProtocol protocol,
694
AvahiBrowserEvent event,
695
const char *name,
696
const char *type,
697
const char *domain,
698
AVAHI_GCC_UNUSED AvahiLookupResultFlags
699
flags,
700
void* userdata) {
832
701
mandos_context *mc = userdata;
833
assert(b);
702
assert(b); /* Spurious warning */
834
703
835
704
/* Called whenever a new services becomes available on the LAN or
836
705
is removed from the LAN */
837
706
838
switch(event){
707
switch (event) {
839
708
default:
840
709
case AVAHI_BROWSER_FAILURE:
841
710
850
719
the callback function is called the Avahi server will free the
851
720
resolver for us. */
852
721
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
722
if (!(avahi_s_service_resolver_new(mc->server, interface,
854
723
protocol, name, type, domain,
855
724
AVAHI_PROTO_INET6, 0,
856
725
resolve_callback, mc)))
870
739
}
871
740
}
872
741
742
/* Combines file name and path and returns the malloced new
743
string. some sane checks could/should be added */
744
static const char *combinepath(const char *first, const char *second){
745
size_t f_len = strlen(first);
746
size_t s_len = strlen(second);
747
char *tmp = malloc(f_len + s_len + 2);
748
if (tmp == NULL){
749
return NULL;
750
}
751
if(f_len > 0){
752
memcpy(tmp, first, f_len); /* Spurious warning */
753
}
754
tmp[f_len] = '/';
755
if(s_len > 0){
756
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
757
}
758
tmp[f_len + 1 + s_len] = '\0';
759
return tmp;
760
}
761
762
873
763
int main(int argc, char *argv[]){
874
AvahiSServiceBrowser *sb = NULL;
875
int error;
876
int ret;
877
intmax_t tmpmax;
878
int numchars;
879
int exitcode = EXIT_SUCCESS;
880
const char *interface = "eth0";
881
struct ifreq network;
882
int sd;
883
uid_t uid;
884
gid_t gid;
885
char *connect_to = NULL;
886
char tempdir[] = "/tmp/mandosXXXXXX";
887
bool tempdir_created = false;
888
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
889
const char *seckey = PATHDIR "/" SECKEY;
890
const char *pubkey = PATHDIR "/" PUBKEY;
891
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
bool gnutls_initialized = false;
896
bool gpgme_initialized = false;
897
double delay = 2.5;
898
899
{
900
struct argp_option options[] = {
901
{ .name = "debug", .key = 128,
902
.doc = "Debug mode", .group = 3 },
903
{ .name = "connect", .key = 'c',
904
.arg = "ADDRESS:PORT",
905
.doc = "Connect directly to a specific Mandos server",
906
.group = 1 },
907
{ .name = "interface", .key = 'i',
908
.arg = "NAME",
909
.doc = "Network interface that will be used to search for"
910
" Mandos servers",
911
.group = 1 },
912
{ .name = "seckey", .key = 's',
913
.arg = "FILE",
914
.doc = "OpenPGP secret key file base name",
915
.group = 1 },
916
{ .name = "pubkey", .key = 'p',
917
.arg = "FILE",
918
.doc = "OpenPGP public key file base name",
919
.group = 2 },
920
{ .name = "dh-bits", .key = 129,
921
.arg = "BITS",
922
.doc = "Bit length of the prime number used in the"
923
" Diffie-Hellman key exchange",
924
.group = 2 },
925
{ .name = "priority", .key = 130,
926
.arg = "STRING",
927
.doc = "GnuTLS priority string for the TLS handshake",
928
.group = 1 },
929
{ .name = "delay", .key = 131,
930
.arg = "SECONDS",
931
.doc = "Maximum delay to wait for interface startup",
932
.group = 2 },
933
{ .name = NULL }
934
};
935
936
error_t parse_opt(int key, char *arg,
937
struct argp_state *state){
938
switch(key){
939
case 128: /* --debug */
940
debug = true;
941
break;
942
case 'c': /* --connect */
943
connect_to = arg;
944
break;
945
case 'i': /* --interface */
946
interface = arg;
947
break;
948
case 's': /* --seckey */
949
seckey = arg;
950
break;
951
case 'p': /* --pubkey */
952
pubkey = arg;
953
break;
954
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
958
fprintf(stderr, "Bad number of DH bits\n");
959
exit(EXIT_FAILURE);
960
}
961
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
962
break;
963
case 130: /* --priority */
964
mc.priority = arg;
965
break;
966
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad delay\n");
970
exit(EXIT_FAILURE);
971
}
972
break;
973
case ARGP_KEY_ARG:
974
argp_usage(state);
975
case ARGP_KEY_END:
976
break;
977
default:
978
return ARGP_ERR_UNKNOWN;
979
}
980
return 0;
981
}
982
983
struct argp argp = { .options = options, .parser = parse_opt,
984
.args_doc = "",
985
.doc = "Mandos client -- Get and decrypt"
986
" passwords from a Mandos server" };
987
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
988
if(ret == ARGP_ERR_UNKNOWN){
989
fprintf(stderr, "Unknown error while parsing arguments\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
}
993
}
994
995
/* If the interface is down, bring it up */
996
if(interface[0] != '\0'){
997
#ifdef __linux__
998
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
messages to mess up the prompt */
1000
ret = klogctl(8, NULL, 5);
1001
bool restore_loglevel = true;
1002
if(ret == -1){
1003
restore_loglevel = false;
1004
perror("klogctl");
1005
}
1006
#endif
1007
1008
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
if(sd < 0){
1010
perror("socket");
1011
exitcode = EXIT_FAILURE;
1012
#ifdef __linux__
1013
if(restore_loglevel){
1014
ret = klogctl(7, NULL, 0);
1015
if(ret == -1){
1016
perror("klogctl");
1017
}
1018
}
1019
#endif
1020
goto end;
1021
}
1022
strcpy(network.ifr_name, interface);
1023
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1024
if(ret == -1){
1025
perror("ioctl SIOCGIFFLAGS");
1026
#ifdef __linux__
1027
if(restore_loglevel){
1028
ret = klogctl(7, NULL, 0);
1029
if(ret == -1){
1030
perror("klogctl");
1031
}
1032
}
1033
#endif
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
if((network.ifr_flags & IFF_UP) == 0){
1038
network.ifr_flags |= IFF_UP;
1039
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
if(ret == -1){
1041
perror("ioctl SIOCSIFFLAGS");
764
AvahiSServiceBrowser *sb = NULL;
765
int error;
766
int ret;
767
int exitcode = EXIT_SUCCESS;
768
const char *interface = "eth0";
769
struct ifreq network;
770
int sd;
771
uid_t uid;
772
gid_t gid;
773
char *connect_to = NULL;
774
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
775
const char *pubkeyfile = "pubkey.txt";
776
const char *seckeyfile = "seckey.txt";
777
mandos_context mc = { .simple_poll = NULL, .server = NULL,
778
.dh_bits = 1024, .priority = "SECURE256"};
779
bool gnutls_initalized = false;
780
781
{
782
struct argp_option options[] = {
783
{ .name = "debug", .key = 128,
784
.doc = "Debug mode", .group = 3 },
785
{ .name = "connect", .key = 'c',
786
.arg = "IP",
787
.doc = "Connect directly to a sepcified mandos server",
788
.group = 1 },
789
{ .name = "interface", .key = 'i',
790
.arg = "INTERFACE",
791
.doc = "Interface that Avahi will conntect through",
792
.group = 1 },
793
{ .name = "keydir", .key = 'd',
794
.arg = "KEYDIR",
795
.doc = "Directory where the openpgp keyring is",
796
.group = 1 },
797
{ .name = "seckey", .key = 's',
798
.arg = "SECKEY",
799
.doc = "Secret openpgp key for gnutls authentication",
800
.group = 1 },
801
{ .name = "pubkey", .key = 'p',
802
.arg = "PUBKEY",
803
.doc = "Public openpgp key for gnutls authentication",
804
.group = 2 },
805
{ .name = "dh-bits", .key = 129,
806
.arg = "BITS",
807
.doc = "dh-bits to use in gnutls communication",
808
.group = 2 },
809
{ .name = "priority", .key = 130,
810
.arg = "PRIORITY",
811
.doc = "GNUTLS priority", .group = 1 },
812
{ .name = NULL }
813
};
814
815
816
error_t parse_opt (int key, char *arg,
817
struct argp_state *state) {
818
/* Get the INPUT argument from `argp_parse', which we know is
819
a pointer to our plugin list pointer. */
820
switch (key) {
821
case 128:
822
debug = true;
823
break;
824
case 'c':
825
connect_to = arg;
826
break;
827
case 'i':
828
interface = arg;
829
break;
830
case 'd':
831
keydir = arg;
832
break;
833
case 's':
834
seckeyfile = arg;
835
break;
836
case 'p':
837
pubkeyfile = arg;
838
break;
839
case 129:
840
errno = 0;
841
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
842
if (errno){
843
perror("strtol");
844
exit(EXIT_FAILURE);
845
}
846
break;
847
case 130:
848
mc.priority = arg;
849
break;
850
case ARGP_KEY_ARG:
851
argp_usage (state);
852
break;
853
case ARGP_KEY_END:
854
break;
855
default:
856
return ARGP_ERR_UNKNOWN;
857
}
858
return 0;
859
}
860
861
struct argp argp = { .options = options, .parser = parse_opt,
862
.args_doc = "",
863
.doc = "Mandos client -- Get and decrypt"
864
" passwords from mandos server" };
865
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unkown error while parsing arguments\n");
1042
868
exitcode = EXIT_FAILURE;
1043
#ifdef __linux__
1044
if(restore_loglevel){
1045
ret = klogctl(7, NULL, 0);
1046
if(ret == -1){
1047
perror("klogctl");
1048
}
1049
}
1050
#endif
1051
869
goto end;
1052
870
}
1053
871
}
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
1056
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1057
if(ret == -1){
1058
perror("ioctl SIOCGIFFLAGS");
1059
} else if(network.ifr_flags & IFF_RUNNING){
1060
break;
1061
}
1062
struct timespec sleeptime = { .tv_nsec = 250000000 };
1063
ret = nanosleep(&sleeptime, NULL);
1064
if(ret == -1 and errno != EINTR){
1065
perror("nanosleep");
1066
}
1067
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1071
}
1072
#ifdef __linux__
1073
if(restore_loglevel){
1074
/* Restores kernel loglevel to default */
1075
ret = klogctl(7, NULL, 0);
1076
if(ret == -1){
1077
perror("klogctl");
1078
}
1079
}
1080
#endif
1081
}
1082
1083
uid = getuid();
1084
gid = getgid();
1085
1086
errno = 0;
1087
setgid(gid);
1088
if(ret == -1){
1089
perror("setgid");
1090
}
1091
1092
ret = setuid(uid);
1093
if(ret == -1){
1094
perror("setuid");
1095
}
1096
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1098
if(ret == -1){
1099
fprintf(stderr, "init_gnutls_global failed\n");
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
} else {
1103
gnutls_initialized = true;
1104
}
1105
1106
if(mkdtemp(tempdir) == NULL){
1107
perror("mkdtemp");
1108
goto end;
1109
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1113
fprintf(stderr, "init_gpgme failed\n");
1114
exitcode = EXIT_FAILURE;
1115
goto end;
1116
} else {
1117
gpgme_initialized = true;
1118
}
1119
1120
if(interface[0] != '\0'){
872
873
pubkeyfile = combinepath(keydir, pubkeyfile);
874
if (pubkeyfile == NULL){
875
perror("combinepath");
876
exitcode = EXIT_FAILURE;
877
goto end;
878
}
879
880
seckeyfile = combinepath(keydir, seckeyfile);
881
if (seckeyfile == NULL){
882
perror("combinepath");
883
goto end;
884
}
885
886
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
887
if (ret == -1){
888
fprintf(stderr, "init_gnutls_global\n");
889
goto end;
890
} else {
891
gnutls_initalized = true;
892
}
893
894
uid = getuid();
895
gid = getgid();
896
897
ret = setuid(uid);
898
if (ret == -1){
899
perror("setuid");
900
}
901
902
setgid(gid);
903
if (ret == -1){
904
perror("setgid");
905
}
906
1121
907
if_index = (AvahiIfIndex) if_nametoindex(interface);
1122
908
if(if_index == 0){
1123
909
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
}
1128
1129
if(connect_to != NULL){
1130
/* Connect directly, do not use Zeroconf */
1131
/* (Mainly meant for debugging) */
1132
char *address = strrchr(connect_to, ':');
1133
if(address == NULL){
1134
fprintf(stderr, "No colon in address\n");
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1142
fprintf(stderr, "Bad port number\n");
1143
exitcode = EXIT_FAILURE;
1144
goto end;
1145
}
1146
port = (uint16_t)tmpmax;
1147
*address = '\0';
1148
address = connect_to;
1149
/* Colon in address indicates IPv6 */
1150
int af;
1151
if(strchr(address, ':') != NULL){
1152
af = AF_INET6;
1153
} else {
1154
af = AF_INET;
1155
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1158
if(ret < 0){
1159
exitcode = EXIT_FAILURE;
1160
} else {
1161
exitcode = EXIT_SUCCESS;
1162
}
1163
goto end;
1164
}
1165
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1178
goto end;
1179
}
1180
1181
{
1182
AvahiServerConfig config;
1183
/* Do not publish any local Zeroconf records */
1184
avahi_server_config_init(&config);
1185
config.publish_hinfo = 0;
1186
config.publish_addresses = 0;
1187
config.publish_workstation = 0;
1188
config.publish_domain = 0;
1189
1190
/* Allocate a new server */
1191
mc.server = avahi_server_new(avahi_simple_poll_get
1192
(mc.simple_poll), &config, NULL,
1193
NULL, &error);
1194
1195
/* Free the Avahi configuration data */
1196
avahi_server_config_free(&config);
1197
}
1198
1199
/* Check if creating the Avahi server object succeeded */
1200
if(mc.server == NULL){
1201
fprintf(stderr, "Failed to create Avahi server: %s\n",
1202
avahi_strerror(error));
1203
exitcode = EXIT_FAILURE;
1204
goto end;
1205
}
1206
1207
/* Create the Avahi service browser */
1208
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1211
if(sb == NULL){
1212
fprintf(stderr, "Failed to create service browser: %s\n",
1213
avahi_strerror(avahi_server_errno(mc.server)));
1214
exitcode = EXIT_FAILURE;
1215
goto end;
1216
}
1217
1218
/* Run the main loop */
1219
1220
if(debug){
1221
fprintf(stderr, "Starting Avahi loop search\n");
1222
}
1223
1224
avahi_simple_poll_loop(mc.simple_poll);
1225
910
exit(EXIT_FAILURE);
911
}
912
913
if(connect_to != NULL){
914
/* Connect directly, do not use Zeroconf */
915
/* (Mainly meant for debugging) */
916
char *address = strrchr(connect_to, ':');
917
if(address == NULL){
918
fprintf(stderr, "No colon in address\n");
919
exitcode = EXIT_FAILURE;
920
goto end;
921
}
922
errno = 0;
923
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
924
if(errno){
925
perror("Bad port number");
926
exitcode = EXIT_FAILURE;
927
goto end;
928
}
929
*address = '\0';
930
address = connect_to;
931
ret = start_mandos_communication(address, port, if_index, &mc);
932
if(ret < 0){
933
exitcode = EXIT_FAILURE;
934
} else {
935
exitcode = EXIT_SUCCESS;
936
}
937
goto end;
938
}
939
940
/* If the interface is down, bring it up */
941
{
942
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
943
if(sd < 0) {
944
perror("socket");
945
exitcode = EXIT_FAILURE;
946
goto end;
947
}
948
strcpy(network.ifr_name, interface); /* Spurious warning */
949
ret = ioctl(sd, SIOCGIFFLAGS, &network);
950
if(ret == -1){
951
perror("ioctl SIOCGIFFLAGS");
952
exitcode = EXIT_FAILURE;
953
goto end;
954
}
955
if((network.ifr_flags & IFF_UP) == 0){
956
network.ifr_flags |= IFF_UP;
957
ret = ioctl(sd, SIOCSIFFLAGS, &network);
958
if(ret == -1){
959
perror("ioctl SIOCSIFFLAGS");
960
exitcode = EXIT_FAILURE;
961
goto end;
962
}
963
}
964
close(sd);
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
1226
1029
end:
1227
1228
if(debug){
1229
fprintf(stderr, "%s exiting\n", argv[0]);
1230
}
1231
1232
/* Cleanup things */
1233
if(sb != NULL)
1234
avahi_s_service_browser_free(sb);
1235
1236
if(mc.server != NULL)
1237
avahi_server_free(mc.server);
1238
1239
if(mc.simple_poll != NULL)
1240
avahi_simple_poll_free(mc.simple_poll);
1241
1242
if(gnutls_initialized){
1243
gnutls_certificate_free_credentials(mc.cred);
1244
gnutls_global_deinit();
1245
gnutls_dh_params_deinit(mc.dh_params);
1246
}
1247
1248
if(gpgme_initialized){
1249
gpgme_release(mc.ctx);
1250
}
1251
1252
/* Removes the temp directory used by GPGME */
1253
if(tempdir_created){
1254
DIR *d;
1255
struct dirent *direntry;
1256
d = opendir(tempdir);
1257
if(d == NULL){
1258
if(errno != ENOENT){
1259
perror("opendir");
1260
}
1261
} else {
1262
while(true){
1263
direntry = readdir(d);
1264
if(direntry == NULL){
1265
break;
1266
}
1267
/* Skip "." and ".." */
1268
if(direntry->d_name[0] == '.'
1269
and (direntry->d_name[1] == '\0'
1270
or (direntry->d_name[1] == '.'
1271
and direntry->d_name[2] == '\0'))){
1272
continue;
1273
}
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", tempdir,
1276
direntry->d_name);
1277
if(ret < 0){
1278
perror("asprintf");
1279
continue;
1280
}
1281
ret = remove(fullname);
1282
if(ret == -1){
1283
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1284
strerror(errno));
1285
}
1286
free(fullname);
1287
}
1288
closedir(d);
1289
}
1290
ret = rmdir(tempdir);
1291
if(ret == -1 and errno != ENOENT){
1292
perror("rmdir");
1293
}
1294
}
1295
1296
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(pubkeyfile);
1045
free(seckeyfile);
1046
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1050
}
1051
1052
return exitcode;
1297
1053
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0