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- Committer: Teddy Hogeborn
- Date: 2008-08-09 04:56:00 UTC
- mfrom: (24.1.27 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080809045600-m7jx3tj4wwunaffa
Merge.
- 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, ferror() */
41
38
#include <stdint.h> /* uint16_t, uint32_t */
42
39
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
40
#include <stdlib.h> /* free() */
45
41
#include <stdbool.h> /* bool, true */
46
#include <string.h> /* memset(), strcmp(), strlen(),
47
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
42
#include <string.h> /* memset(), strcmp(), strlen, strerror() */
43
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
44
SIOCSIFFLAGS */
49
45
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
55
47
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
48
struct in6_addr, inet_pton(),
57
49
connect() */
58
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
65
53
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
54
SIOCSIFFLAGS, if_indextoname(),
67
55
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
68
57
#include <netinet/in.h>
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
72
58
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
74
#include <argp.h> /* struct argp_option, error_t, struct
75
argp_state, struct argp,
76
argp_parse(), ARGP_KEY_ARG,
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
81
63
82
64
/* Avahi */
83
/* All Avahi types, constants and functions
84
Avahi*, avahi_*,
85
AVAHI_* */
86
#include <avahi-core/core.h>
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
87
67
#include <avahi-core/lookup.h>
88
#include <avahi-core/log.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
89
69
#include <avahi-common/simple-watch.h>
90
70
#include <avahi-common/malloc.h>
91
71
#include <avahi-common/error.h>
92
72
93
73
/* GnuTLS */
94
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
95
functions:
96
gnutls_*
74
#include <gnutls/gnutls.h> /* gnutls_certificate_credentials_t,
75
gnutls_dh_params_t,
76
gnutls_strerror(),
77
gnutls_global_init(),
78
gnutls_global_set_log_level(),
79
gnutls_global_set_log_function(),
80
gnutls_certificate_allocate_credentials(),
81
gnutls_global_deinit(),
82
gnutls_dh_params_init(),
83
gnutls_dh_params_generate(),
84
gnutls_certificate_set_dh_params(),
85
gnutls_certificate_free_credentials(),
86
gnutls_session_t, gnutls_init(),
87
gnutls_priority_set_direct(),
88
gnutls_deinit(),
89
gnutls_credentials_set(),
90
gnutls_certificate_server_set_request(),
91
gnutls_dh_set_prime_bits(),
92
gnutls_transport_set_ptr(),
93
gnutls_transport_ptr_t,
94
gnutls_handshake(),
95
gnutls_record_recv()
96
gnutls_perror(), gnutls_bye(),
97
97
init_gnutls_session(),
98
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
101
GNUTLS_OPENPGP_FMT_BASE64 */
98
GNUTLS_E_SUCCESS,
99
GNUTLS_CRD_CERTIFICATE,
100
GNUTLS_CERT_IGNORE,
101
GNUTLS_E_INTERRUPTED,
102
GNUTLS_E_AGAIN,
103
GNUTLS_E_REHANDSHAKE,
104
GNUTLS_SHUT_RDWR, */
105
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
106
GNUTLS_OPENPGP_FMT_BASE64 */
102
107
103
108
/* GPGME */
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
106
gpgme_*
109
#include <gpgme.h> /* gpgme_data_t, gpgme_ctx_t,
110
gpgme_error_t, gpgme_engine_info_t,
111
gpgme_check_version(),
112
gpgme_engine_check_version(),
113
gpgme_strsource(),
114
gpgme_strerror(),
115
gpgme_get_engine_info(),
116
gpgme_set_engine_info(),
117
gpgme_data_new_from_mem(),
118
gpgme_data_new(), gpgme_new(),
119
gpgme_op_decrypt(),
120
gpgme_decrypt_result_t,
121
gpgme_op_decrypt_result(),
122
gpgme_recipient_t,
123
gpgme_pubkey_algo_name(),
124
gpgme_data_seek(),
125
gpgme_data_read(),
126
gpgme_data_release()
107
127
GPGME_PROTOCOL_OpenPGP,
108
GPG_ERR_NO_* */
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
109
130
110
131
#define BUFFER_SIZE 256
111
132
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
115
116
133
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
117
135
static const char mandos_protocol_version[] = "1";
118
const char *argp_program_version = "mandos-client " VERSION;
136
const char *argp_program_version = "mandosclient 0.9";
119
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
120
138
121
139
/* Used for passing in values through the Avahi callback functions */
126
144
unsigned int dh_bits;
127
145
gnutls_dh_params_t dh_params;
128
146
const char *priority;
129
gpgme_ctx_t ctx;
130
147
} mandos_context;
131
148
132
149
/*
136
153
*/
137
154
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
155
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
156
if (buffer_length + BUFFER_SIZE > buffer_capacity){
140
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
158
if (buffer == NULL){
142
159
return 0;
143
160
}
144
161
buffer_capacity += BUFFER_SIZE;
147
164
}
148
165
149
166
/*
150
* Initialize GPGME.
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
151
169
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
170
static ssize_t pgp_packet_decrypt (const char *cryptotext,
171
size_t crypto_size,
172
char **plaintext,
173
const char *homedir){
174
gpgme_data_t dh_crypto, dh_plain;
175
gpgme_ctx_t ctx;
155
176
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
156
180
gpgme_engine_info_t engine_info;
157
181
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");
182
if (debug){
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
196
184
}
197
185
198
186
/* Init GPGME */
199
187
gpgme_check_version(NULL);
200
188
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
189
if (rc != GPG_ERR_NO_ERROR){
202
190
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
191
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
192
return -1;
205
193
}
206
194
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){
195
/* Set GPGME home directory for the OpenPGP engine only */
196
rc = gpgme_get_engine_info (&engine_info);
197
if (rc != GPG_ERR_NO_ERROR){
210
198
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
199
gpgme_strsource(rc), gpgme_strerror(rc));
212
return false;
200
return -1;
213
201
}
214
202
while(engine_info != NULL){
215
203
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
216
204
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
217
engine_info->file_name, tempdir);
205
engine_info->file_name, homedir);
218
206
break;
219
207
}
220
208
engine_info = engine_info->next;
221
209
}
222
210
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");
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
258
213
}
259
214
260
215
/* Create new GPGME data buffer from memory cryptotext */
261
216
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
217
0);
263
if(rc != GPG_ERR_NO_ERROR){
218
if (rc != GPG_ERR_NO_ERROR){
264
219
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
220
gpgme_strsource(rc), gpgme_strerror(rc));
266
221
return -1;
268
223
269
224
/* Create new empty GPGME data buffer for the plaintext */
270
225
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
226
if (rc != GPG_ERR_NO_ERROR){
272
227
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
228
gpgme_strsource(rc), gpgme_strerror(rc));
274
229
gpgme_data_release(dh_crypto);
275
230
return -1;
276
231
}
277
232
233
/* Create new GPGME "context" */
234
rc = gpgme_new(&ctx);
235
if (rc != GPG_ERR_NO_ERROR){
236
fprintf(stderr, "bad gpgme_new: %s: %s\n",
237
gpgme_strsource(rc), gpgme_strerror(rc));
238
plaintext_length = -1;
239
goto decrypt_end;
240
}
241
278
242
/* Decrypt data from the cryptotext data buffer to the plaintext
279
243
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
245
if (rc != GPG_ERR_NO_ERROR){
282
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
247
gpgme_strsource(rc), gpgme_strerror(rc));
284
248
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
249
goto decrypt_end;
314
250
}
315
251
317
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
318
254
}
319
255
256
if (debug){
257
gpgme_decrypt_result_t result;
258
result = gpgme_op_decrypt_result(ctx);
259
if (result == NULL){
260
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
261
} else {
262
fprintf(stderr, "Unsupported algorithm: %s\n",
263
result->unsupported_algorithm);
264
fprintf(stderr, "Wrong key usage: %d\n",
265
result->wrong_key_usage);
266
if(result->file_name != NULL){
267
fprintf(stderr, "File name: %s\n", result->file_name);
268
}
269
gpgme_recipient_t recipient;
270
recipient = result->recipients;
271
if(recipient){
272
while(recipient != NULL){
273
fprintf(stderr, "Public key algorithm: %s\n",
274
gpgme_pubkey_algo_name(recipient->pubkey_algo));
275
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
276
fprintf(stderr, "Secret key available: %s\n",
277
recipient->status == GPG_ERR_NO_SECKEY
278
? "No" : "Yes");
279
recipient = recipient->next;
280
}
281
}
282
}
283
}
284
320
285
/* 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");
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
287
perror("pgpme_data_seek");
323
288
plaintext_length = -1;
324
289
goto decrypt_end;
325
290
}
329
294
plaintext_capacity = adjustbuffer(plaintext,
330
295
(size_t)plaintext_length,
331
296
plaintext_capacity);
332
if(plaintext_capacity == 0){
297
if (plaintext_capacity == 0){
333
298
perror("adjustbuffer");
334
299
plaintext_length = -1;
335
300
goto decrypt_end;
338
303
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
339
304
BUFFER_SIZE);
340
305
/* Print the data, if any */
341
if(ret == 0){
306
if (ret == 0){
342
307
/* EOF */
343
308
break;
344
309
}
349
314
}
350
315
plaintext_length += ret;
351
316
}
352
317
353
318
if(debug){
354
319
fprintf(stderr, "Decrypted password is: ");
355
320
for(ssize_t i = 0; i < plaintext_length; i++){
368
333
return plaintext_length;
369
334
}
370
335
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)
336
static const char * safer_gnutls_strerror (int value) {
337
const char *ret = gnutls_strerror (value);
338
if (ret == NULL)
375
339
ret = "(unknown)";
376
340
return ret;
377
341
}
383
347
}
384
348
385
349
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
350
const char *pubkeyfile,
351
const char *seckeyfile){
388
352
int ret;
389
353
390
354
if(debug){
391
355
fprintf(stderr, "Initializing GnuTLS\n");
392
356
}
393
394
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
360
fprintf (stderr, "GnuTLS global_init: %s\n",
361
safer_gnutls_strerror(ret));
398
362
return -1;
399
363
}
400
364
401
if(debug){
365
if (debug){
402
366
/* "Use a log level over 10 to enable all debugging options."
403
367
* - GnuTLS manual
404
368
*/
407
371
}
408
372
409
373
/* OpenPGP credentials */
410
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();
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
377
safer_gnutls_strerror(ret));
378
gnutls_global_deinit ();
418
379
return -1;
419
380
}
420
381
421
382
if(debug){
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
425
386
}
426
387
427
388
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
390
if (ret != GNUTLS_E_SUCCESS) {
431
391
fprintf(stderr,
432
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
435
395
safer_gnutls_strerror(ret));
436
396
goto globalfail;
437
397
}
438
398
439
399
/* GnuTLS server initialization */
440
400
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));
401
if (ret != GNUTLS_E_SUCCESS) {
402
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
403
" %s\n", safer_gnutls_strerror(ret));
444
404
goto globalfail;
445
405
}
446
406
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));
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
409
safer_gnutls_strerror(ret));
450
410
goto globalfail;
451
411
}
452
412
453
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
454
414
455
415
return 0;
456
416
457
417
globalfail:
458
418
459
419
gnutls_certificate_free_credentials(mc->cred);
460
420
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
462
421
return -1;
422
463
423
}
464
424
465
425
static int init_gnutls_session(mandos_context *mc,
467
427
int ret;
468
428
/* GnuTLS session creation */
469
429
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
430
if (ret != GNUTLS_E_SUCCESS){
471
431
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
432
safer_gnutls_strerror(ret));
473
433
}
475
435
{
476
436
const char *err;
477
437
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
438
if (ret != GNUTLS_E_SUCCESS) {
479
439
fprintf(stderr, "Syntax error at: %s\n", err);
480
440
fprintf(stderr, "GnuTLS error: %s\n",
481
441
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
442
gnutls_deinit (*session);
483
443
return -1;
484
444
}
485
445
}
486
446
487
447
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
448
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
449
if (ret != GNUTLS_E_SUCCESS) {
490
450
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
451
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
452
gnutls_deinit (*session);
493
453
return -1;
494
454
}
495
455
496
456
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
457
gnutls_certificate_server_set_request (*session,
458
GNUTLS_CERT_IGNORE);
499
459
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
460
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
461
502
462
return 0;
503
463
}
511
471
AvahiIfIndex if_index,
512
472
mandos_context *mc){
513
473
int ret, tcp_sd;
514
ssize_t sret;
515
474
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
516
475
char *buffer = NULL;
517
476
char *decrypted_buffer;
523
482
char interface[IF_NAMESIZE];
524
483
gnutls_session_t session;
525
484
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
485
ret = init_gnutls_session (mc, &session);
486
if (ret != 0){
528
487
return -1;
529
488
}
530
489
531
490
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
534
493
}
535
494
536
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
537
if(tcp_sd < 0){
496
if(tcp_sd < 0) {
538
497
perror("socket");
539
498
return -1;
540
499
}
541
500
542
501
if(debug){
543
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
503
perror("if_indextoname");
547
506
fprintf(stderr, "Binding to interface %s\n", interface);
548
507
}
549
508
550
memset(&to, 0, sizeof(to));
509
memset(&to,0,sizeof(to)); /* Spurious warning */
551
510
to.in6.sin6_family = AF_INET6;
552
511
/* It would be nice to have a way to detect if we were passed an
553
512
IPv4 address here. Now we assume an IPv6 address. */
554
513
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
555
if(ret < 0 ){
514
if (ret < 0 ){
556
515
perror("inet_pton");
557
516
return -1;
558
517
}
560
519
fprintf(stderr, "Bad address: %s\n", ip);
561
520
return -1;
562
521
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
522
to.in6.sin6_port = htons(port); /* Spurious warning */
566
523
567
524
to.in6.sin6_scope_id = (uint32_t)if_index;
568
525
569
526
if(debug){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
572
528
char addrstr[INET6_ADDRSTRLEN] = "";
573
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
530
sizeof(addrstr)) == NULL){
581
537
}
582
538
583
539
ret = connect(tcp_sd, &to.in, sizeof(to));
584
if(ret < 0){
540
if (ret < 0){
585
541
perror("connect");
586
542
return -1;
587
543
}
588
544
589
545
const char *out = mandos_protocol_version;
590
546
written = 0;
591
while(true){
547
while (true){
592
548
size_t out_size = strlen(out);
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
549
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
594
550
out_size - written));
595
if(ret == -1){
551
if (ret == -1){
596
552
perror("write");
597
553
retval = -1;
598
554
goto mandos_end;
601
557
if(written < out_size){
602
558
continue;
603
559
} else {
604
if(out == mandos_protocol_version){
560
if (out == mandos_protocol_version){
605
561
written = 0;
606
562
out = "\r\n";
607
563
} else {
609
565
}
610
566
}
611
567
}
612
568
613
569
if(debug){
614
570
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
571
}
616
572
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
619
do{
620
ret = gnutls_handshake(session);
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
623
if(ret != GNUTLS_E_SUCCESS){
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
574
575
ret = gnutls_handshake (session);
576
577
if (ret != GNUTLS_E_SUCCESS){
624
578
if(debug){
625
579
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
626
gnutls_perror(ret);
580
gnutls_perror (ret);
627
581
}
628
582
retval = -1;
629
583
goto mandos_end;
635
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
636
590
ip);
637
591
}
638
592
639
593
while(true){
640
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
641
595
buffer_capacity);
642
if(buffer_capacity == 0){
596
if (buffer_capacity == 0){
643
597
perror("adjustbuffer");
644
598
retval = -1;
645
599
goto mandos_end;
646
600
}
647
601
648
sret = gnutls_record_recv(session, buffer+buffer_length,
649
BUFFER_SIZE);
650
if(sret == 0){
602
ret = gnutls_record_recv(session, buffer+buffer_length,
603
BUFFER_SIZE);
604
if (ret == 0){
651
605
break;
652
606
}
653
if(sret < 0){
654
switch(sret){
607
if (ret < 0){
608
switch(ret){
655
609
case GNUTLS_E_INTERRUPTED:
656
610
case GNUTLS_E_AGAIN:
657
611
break;
658
612
case GNUTLS_E_REHANDSHAKE:
659
do{
660
ret = gnutls_handshake(session);
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
613
ret = gnutls_handshake (session);
614
if (ret < 0){
663
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
664
gnutls_perror(ret);
616
gnutls_perror (ret);
665
617
retval = -1;
666
618
goto mandos_end;
667
619
}
670
622
fprintf(stderr, "Unknown error while reading data from"
671
623
" encrypted session with Mandos server\n");
672
624
retval = -1;
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
625
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
626
goto mandos_end;
675
627
}
676
628
} else {
677
buffer_length += (size_t) sret;
629
buffer_length += (size_t) ret;
678
630
}
679
631
}
680
632
682
634
fprintf(stderr, "Closing TLS session\n");
683
635
}
684
636
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
686
638
687
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
639
if (buffer_length > 0){
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
641
buffer_length,
690
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
642
&decrypted_buffer,
643
keydir);
644
if (decrypted_buffer_size >= 0){
692
645
written = 0;
693
646
while(written < (size_t) decrypted_buffer_size){
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
647
ret = (int)fwrite (decrypted_buffer + written, 1,
648
(size_t)decrypted_buffer_size - written,
649
stdout);
697
650
if(ret == 0 and ferror(stdout)){
698
651
if(debug){
699
652
fprintf(stderr, "Error writing encrypted data: %s\n",
708
661
} else {
709
662
retval = -1;
710
663
}
711
} else {
712
retval = -1;
713
664
}
714
665
715
666
/* Shutdown procedure */
716
667
717
668
mandos_end:
718
669
free(buffer);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
722
}
723
gnutls_deinit(session);
670
close(tcp_sd);
671
gnutls_deinit (session);
724
672
return retval;
725
673
}
726
674
737
685
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
686
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
687
flags,
740
void* userdata){
688
void* userdata) {
741
689
mandos_context *mc = userdata;
742
assert(r);
690
assert(r); /* Spurious warning */
743
691
744
692
/* Called whenever a service has been resolved successfully or
745
693
timed out */
746
694
747
switch(event){
695
switch (event) {
748
696
default:
749
697
case AVAHI_RESOLVER_FAILURE:
750
698
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
757
705
char ip[AVAHI_ADDRESS_STR_MAX];
758
706
avahi_address_snprint(ip, sizeof(ip), address);
759
707
if(debug){
760
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
763
710
}
764
711
int ret = start_mandos_communication(ip, port, interface, mc);
765
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
712
if (ret == 0){
713
exit(EXIT_SUCCESS);
767
714
}
768
715
}
769
716
}
770
717
avahi_s_service_resolver_free(r);
771
718
}
772
719
773
static void browse_callback(AvahiSServiceBrowser *b,
774
AvahiIfIndex interface,
775
AvahiProtocol protocol,
776
AvahiBrowserEvent event,
777
const char *name,
778
const char *type,
779
const char *domain,
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
flags,
782
void* userdata){
720
static void browse_callback( AvahiSServiceBrowser *b,
721
AvahiIfIndex interface,
722
AvahiProtocol protocol,
723
AvahiBrowserEvent event,
724
const char *name,
725
const char *type,
726
const char *domain,
727
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
flags,
729
void* userdata) {
783
730
mandos_context *mc = userdata;
784
assert(b);
731
assert(b); /* Spurious warning */
785
732
786
733
/* Called whenever a new services becomes available on the LAN or
787
734
is removed from the LAN */
788
735
789
switch(event){
736
switch (event) {
790
737
default:
791
738
case AVAHI_BROWSER_FAILURE:
792
739
801
748
the callback function is called the Avahi server will free the
802
749
resolver for us. */
803
750
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
751
if (!(avahi_s_service_resolver_new(mc->server, interface,
805
752
protocol, name, type, domain,
806
753
AVAHI_PROTO_INET6, 0,
807
754
resolve_callback, mc)))
821
768
}
822
769
}
823
770
771
/* Combines file name and path and returns the malloced new
772
string. some sane checks could/should be added */
773
static const char *combinepath(const char *first, const char *second){
774
size_t f_len = strlen(first);
775
size_t s_len = strlen(second);
776
char *tmp = malloc(f_len + s_len + 2);
777
if (tmp == NULL){
778
return NULL;
779
}
780
if(f_len > 0){
781
memcpy(tmp, first, f_len); /* Spurious warning */
782
}
783
tmp[f_len] = '/';
784
if(s_len > 0){
785
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
786
}
787
tmp[f_len + 1 + s_len] = '\0';
788
return tmp;
789
}
790
791
824
792
int main(int argc, char *argv[]){
825
AvahiSServiceBrowser *sb = NULL;
826
int error;
827
int ret;
828
intmax_t tmpmax;
829
int numchars;
830
int exitcode = EXIT_SUCCESS;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
837
char tempdir[] = "/tmp/mandosXXXXXX";
838
bool tempdir_created = false;
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
840
const char *seckey = PATHDIR "/" SECKEY;
841
const char *pubkey = PATHDIR "/" PUBKEY;
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
bool gnutls_initialized = false;
847
bool gpgme_initialized = false;
848
double delay = 2.5;
849
850
{
851
struct argp_option options[] = {
852
{ .name = "debug", .key = 128,
853
.doc = "Debug mode", .group = 3 },
854
{ .name = "connect", .key = 'c',
855
.arg = "ADDRESS:PORT",
856
.doc = "Connect directly to a specific Mandos server",
857
.group = 1 },
858
{ .name = "interface", .key = 'i',
859
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
862
.group = 1 },
863
{ .name = "seckey", .key = 's',
864
.arg = "FILE",
865
.doc = "OpenPGP secret key file base name",
866
.group = 1 },
867
{ .name = "pubkey", .key = 'p',
868
.arg = "FILE",
869
.doc = "OpenPGP public key file base name",
870
.group = 2 },
871
{ .name = "dh-bits", .key = 129,
872
.arg = "BITS",
873
.doc = "Bit length of the prime number used in the"
874
" Diffie-Hellman key exchange",
875
.group = 2 },
876
{ .name = "priority", .key = 130,
877
.arg = "STRING",
878
.doc = "GnuTLS priority string for the TLS handshake",
879
.group = 1 },
880
{ .name = "delay", .key = 131,
881
.arg = "SECONDS",
882
.doc = "Maximum delay to wait for interface startup",
883
.group = 2 },
884
{ .name = NULL }
885
};
886
887
error_t parse_opt(int key, char *arg,
888
struct argp_state *state){
889
switch(key){
890
case 128: /* --debug */
891
debug = true;
892
break;
893
case 'c': /* --connect */
894
connect_to = arg;
895
break;
896
case 'i': /* --interface */
897
interface = arg;
898
break;
899
case 's': /* --seckey */
900
seckey = arg;
901
break;
902
case 'p': /* --pubkey */
903
pubkey = arg;
904
break;
905
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
911
}
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
break;
914
case 130: /* --priority */
915
mc.priority = arg;
916
break;
917
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
927
break;
928
default:
929
return ARGP_ERR_UNKNOWN;
930
}
931
return 0;
932
}
933
934
struct argp argp = { .options = options, .parser = parse_opt,
935
.args_doc = "",
936
.doc = "Mandos client -- Get and decrypt"
937
" passwords from a Mandos server" };
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
956
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
959
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
968
}
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
if(ret == -1){
972
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
if(ret == -1){
986
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
goto end;
995
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
793
AvahiSServiceBrowser *sb = NULL;
794
int error;
795
int ret;
796
int exitcode = EXIT_SUCCESS;
797
const char *interface = "eth0";
798
struct ifreq network;
799
int sd;
800
uid_t uid;
801
gid_t gid;
802
char *connect_to = NULL;
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
807
.dh_bits = 1024, .priority = "SECURE256"};
808
bool gnutls_initalized = false;
809
810
{
811
struct argp_option options[] = {
812
{ .name = "debug", .key = 128,
813
.doc = "Debug mode", .group = 3 },
814
{ .name = "connect", .key = 'c',
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
817
.group = 1 },
818
{ .name = "interface", .key = 'i',
819
.arg = "INTERFACE",
820
.doc = "Interface that Avahi will conntect through",
821
.group = 1 },
822
{ .name = "keydir", .key = 'd',
823
.arg = "KEYDIR",
824
.doc = "Directory where the openpgp keyring is",
825
.group = 1 },
826
{ .name = "seckey", .key = 's',
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
829
.group = 1 },
830
{ .name = "pubkey", .key = 'p',
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
833
.group = 2 },
834
{ .name = "dh-bits", .key = 129,
835
.arg = "BITS",
836
.doc = "dh-bits to use in gnutls communication",
837
.group = 2 },
838
{ .name = "priority", .key = 130,
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
841
{ .name = NULL }
842
};
843
844
845
error_t parse_opt (int key, char *arg,
846
struct argp_state *state) {
847
/* Get the INPUT argument from `argp_parse', which we know is
848
a pointer to our plugin list pointer. */
849
switch (key) {
850
case 128:
851
debug = true;
852
break;
853
case 'c':
854
connect_to = arg;
855
break;
856
case 'i':
857
interface = arg;
858
break;
859
case 'd':
860
keydir = arg;
861
break;
862
case 's':
863
seckeyfile = arg;
864
break;
865
case 'p':
866
pubkeyfile = arg;
867
break;
868
case 129:
869
errno = 0;
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
871
if (errno){
872
perror("strtol");
873
exit(EXIT_FAILURE);
874
}
875
break;
876
case 130:
877
mc.priority = arg;
878
break;
879
case ARGP_KEY_ARG:
880
argp_usage (state);
881
break;
882
case ARGP_KEY_END:
883
break;
884
default:
885
return ARGP_ERR_UNKNOWN;
886
}
887
return 0;
888
}
889
890
struct argp argp = { .options = options, .parser = parse_opt,
891
.args_doc = "",
892
.doc = "Mandos client -- Get and decrypt"
893
" passwords from mandos server" };
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
895
}
896
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
899
perror("combinepath");
900
exitcode = EXIT_FAILURE;
901
goto end;
902
}
903
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
906
perror("combinepath");
907
goto end;
908
}
909
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
911
if (ret == -1){
912
fprintf(stderr, "init_gnutls_global\n");
913
goto end;
914
} else {
915
gnutls_initalized = true;
916
}
917
918
uid = getuid();
919
gid = getgid();
920
921
ret = setuid(uid);
922
if (ret == -1){
923
perror("setuid");
924
}
925
926
setgid(gid);
927
if (ret == -1){
928
perror("setgid");
929
}
930
931
if_index = (AvahiIfIndex) if_nametoindex(interface);
932
if(if_index == 0){
933
fprintf(stderr, "No such interface: \"%s\"\n", interface);
934
exit(EXIT_FAILURE);
935
}
936
937
if(connect_to != NULL){
938
/* Connect directly, do not use Zeroconf */
939
/* (Mainly meant for debugging) */
940
char *address = strrchr(connect_to, ':');
941
if(address == NULL){
942
fprintf(stderr, "No colon in address\n");
943
exitcode = EXIT_FAILURE;
944
goto end;
945
}
946
errno = 0;
947
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
948
if(errno){
949
perror("Bad port number");
950
exitcode = EXIT_FAILURE;
951
goto end;
952
}
953
*address = '\0';
954
address = connect_to;
955
ret = start_mandos_communication(address, port, if_index, &mc);
956
if(ret < 0){
957
exitcode = EXIT_FAILURE;
958
} else {
959
exitcode = EXIT_SUCCESS;
960
}
961
goto end;
962
}
963
964
/* If the interface is down, bring it up */
965
{
966
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
967
if(sd < 0) {
968
perror("socket");
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
strcpy(network.ifr_name, interface); /* Spurious warning */
999
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1000
974
if(ret == -1){
1001
975
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
} else {
1043
gnutls_initialized = true;
1044
}
1045
1046
if(mkdtemp(tempdir) == NULL){
1047
perror("mkdtemp");
1048
goto end;
1049
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
} else {
1057
gpgme_initialized = true;
1058
}
1059
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1065
}
1066
1067
if(connect_to != NULL){
1068
/* Connect directly, do not use Zeroconf */
1069
/* (Mainly meant for debugging) */
1070
char *address = strrchr(connect_to, ':');
1071
if(address == NULL){
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
1085
*address = '\0';
1086
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
1091
exitcode = EXIT_SUCCESS;
1092
}
1093
goto end;
1094
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1111
{
1112
AvahiServerConfig config;
1113
/* Do not publish any local Zeroconf records */
1114
avahi_server_config_init(&config);
1115
config.publish_hinfo = 0;
1116
config.publish_addresses = 0;
1117
config.publish_workstation = 0;
1118
config.publish_domain = 0;
1119
1120
/* Allocate a new server */
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
1124
1125
/* Free the Avahi configuration data */
1126
avahi_server_config_free(&config);
1127
}
1128
1129
/* Check if creating the Avahi server object succeeded */
1130
if(mc.server == NULL){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
1134
goto end;
1135
}
1136
1137
/* Create the Avahi service browser */
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1141
if(sb == NULL){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
1148
/* Run the main loop */
1149
1150
if(debug){
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
1155
976
exitcode = EXIT_FAILURE;
977
goto end;
978
}
979
if((network.ifr_flags & IFF_UP) == 0){
980
network.ifr_flags |= IFF_UP;
981
ret = ioctl(sd, SIOCSIFFLAGS, &network);
982
if(ret == -1){
983
perror("ioctl SIOCSIFFLAGS");
984
exitcode = EXIT_FAILURE;
985
goto end;
986
}
987
}
988
close(sd);
989
}
990
991
if (not debug){
992
avahi_set_log_function(empty_log);
993
}
994
995
/* Initialize the pseudo-RNG for Avahi */
996
srand((unsigned int) time(NULL));
997
998
/* Allocate main Avahi loop object */
999
mc.simple_poll = avahi_simple_poll_new();
1000
if (mc.simple_poll == NULL) {
1001
fprintf(stderr, "Avahi: Failed to create simple poll"
1002
" object.\n");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
1007
{
1008
AvahiServerConfig config;
1009
/* Do not publish any local Zeroconf records */
1010
avahi_server_config_init(&config);
1011
config.publish_hinfo = 0;
1012
config.publish_addresses = 0;
1013
config.publish_workstation = 0;
1014
config.publish_domain = 0;
1015
1016
/* Allocate a new server */
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1018
(mc.simple_poll), &config, NULL,
1019
NULL, &error);
1020
1021
/* Free the Avahi configuration data */
1022
avahi_server_config_free(&config);
1023
}
1024
1025
/* Check if creating the Avahi server object succeeded */
1026
if (mc.server == NULL) {
1027
fprintf(stderr, "Failed to create Avahi server: %s\n",
1028
avahi_strerror(error));
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
/* Create the Avahi service browser */
1034
sb = avahi_s_service_browser_new(mc.server, if_index,
1035
AVAHI_PROTO_INET6,
1036
"_mandos._tcp", NULL, 0,
1037
browse_callback, &mc);
1038
if (sb == NULL) {
1039
fprintf(stderr, "Failed to create service browser: %s\n",
1040
avahi_strerror(avahi_server_errno(mc.server)));
1041
exitcode = EXIT_FAILURE;
1042
goto end;
1043
}
1044
1045
/* Run the main loop */
1046
1047
if (debug){
1048
fprintf(stderr, "Starting Avahi loop search\n");
1049
}
1050
1051
avahi_simple_poll_loop(mc.simple_poll);
1052
1156
1053
end:
1157
1158
if(debug){
1159
fprintf(stderr, "%s exiting\n", argv[0]);
1160
}
1161
1162
/* Cleanup things */
1163
if(sb != NULL)
1164
avahi_s_service_browser_free(sb);
1165
1166
if(mc.server != NULL)
1167
avahi_server_free(mc.server);
1168
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
1171
1172
if(gnutls_initialized){
1173
gnutls_certificate_free_credentials(mc.cred);
1174
gnutls_global_deinit();
1175
gnutls_dh_params_deinit(mc.dh_params);
1176
}
1177
1178
if(gpgme_initialized){
1179
gpgme_release(mc.ctx);
1180
}
1181
1182
/* Removes the temp directory used by GPGME */
1183
if(tempdir_created){
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1189
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
1204
char *fullname = NULL;
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
1206
direntry->d_name);
1207
if(ret < 0){
1208
perror("asprintf");
1209
continue;
1210
}
1211
ret = remove(fullname);
1212
if(ret == -1){
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
1215
}
1216
free(fullname);
1217
}
1218
closedir(d);
1219
}
1220
ret = rmdir(tempdir);
1221
if(ret == -1 and errno != ENOENT){
1222
perror("rmdir");
1223
}
1224
}
1225
1226
return exitcode;
1054
1055
if (debug){
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1057
}
1058
1059
/* Cleanup things */
1060
if (sb != NULL)
1061
avahi_s_service_browser_free(sb);
1062
1063
if (mc.server != NULL)
1064
avahi_server_free(mc.server);
1065
1066
if (mc.simple_poll != NULL)
1067
avahi_simple_poll_free(mc.simple_poll);
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1071
if (gnutls_initalized){
1072
gnutls_certificate_free_credentials (mc.cred);
1073
gnutls_global_deinit ();
1074
}
1075
1076
return exitcode;
1227
1077
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0