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- Committer: Björn Påhlsson
- Date: 2008-07-22 06:27:12 UTC
- mfrom: (27 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 30.
- Revision ID: belorn@braxen-20080722062712-akkycfgee7pn5syr
merge
- files removed:
- server.conf
- files renamed:
- clients.conf => mandos-clients.conf
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
8
8
* includes the following functions: "resolve_callback",
9
9
* "browse_callback", and parts of "main".
10
10
*
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
11
* Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
12
* Påhlsson.
13
13
*
14
14
* This program is free software: you can redistribute it and/or
15
15
* modify it under the terms of the GNU General Public License as
25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
27
27
*
28
* Contact the authors at <mandos@fukt.bsnet.se>.
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
29
30
*/
30
31
31
/* Needed by GPGME, specifically gpgme_data_seek() */
32
#define _FORTIFY_SOURCE 2
33
32
34
#define _LARGEFILE_SOURCE
33
35
#define _FILE_OFFSET_BITS 64
34
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
37
#include <stdio.h>
38
38
#include <assert.h>
39
39
#include <stdlib.h>
40
40
#include <time.h>
41
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
46
42
47
43
#include <avahi-core/core.h>
48
44
#include <avahi-core/lookup.h>
51
47
#include <avahi-common/malloc.h>
52
48
#include <avahi-common/error.h>
53
49
54
/* Mandos client part */
50
//mandos client part
55
51
#include <sys/types.h> /* socket(), inet_pton() */
56
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
53
struct in6_addr, inet_pton() */
64
60
#include <string.h> /* memset */
65
61
#include <arpa/inet.h> /* inet_pton() */
66
62
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
63
69
/* GPGME */
64
// gpgme
70
65
#include <errno.h> /* perror() */
71
66
#include <gpgme.h>
72
67
73
/* getopt_long */
68
// getopt long
74
69
#include <getopt.h>
75
70
71
#ifndef CERT_ROOT
72
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
73
#endif
74
#define CERTFILE CERT_ROOT "openpgp-client.txt"
75
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
76
76
#define BUFFER_SIZE 256
77
78
static const char *keydir = "/conf/conf.d/mandos";
79
static const char *pubkeyfile = "pubkey.txt";
80
static const char *seckeyfile = "seckey.txt";
77
#define DH_BITS 1024
81
78
82
79
bool debug = false;
83
80
84
const char mandos_protocol_version[] = "1";
85
86
/* Used for passing in values through all the callback functions */
87
81
typedef struct {
88
AvahiSimplePoll *simple_poll;
89
AvahiServer *server;
82
gnutls_session_t session;
90
83
gnutls_certificate_credentials_t cred;
91
unsigned int dh_bits;
92
84
gnutls_dh_params_t dh_params;
93
const char *priority;
94
} mandos_context;
95
96
size_t adjustbuffer(char **buffer, size_t buffer_length,
97
size_t buffer_capacity){
98
if (buffer_length + BUFFER_SIZE > buffer_capacity){
99
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
100
if (buffer == NULL){
101
return 0;
102
}
103
buffer_capacity += BUFFER_SIZE;
104
}
105
return buffer_capacity;
106
}
107
108
/*
109
* Decrypt OpenPGP data using keyrings in HOMEDIR.
110
* Returns -1 on error
111
*/
112
static ssize_t pgp_packet_decrypt (const char *cryptotext,
113
size_t crypto_size,
114
char **plaintext,
115
const char *homedir){
85
} encrypted_session;
86
87
88
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet, const char *homedir){
116
90
gpgme_data_t dh_crypto, dh_plain;
117
91
gpgme_ctx_t ctx;
118
92
gpgme_error_t rc;
119
93
ssize_t ret;
120
size_t plaintext_capacity = 0;
121
ssize_t plaintext_length = 0;
94
ssize_t new_packet_capacity = 0;
95
ssize_t new_packet_length = 0;
122
96
gpgme_engine_info_t engine_info;
123
97
124
98
if (debug){
125
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
99
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
126
100
}
127
101
128
102
/* Init GPGME */
129
103
gpgme_check_version(NULL);
130
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
131
if (rc != GPG_ERR_NO_ERROR){
132
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
133
gpgme_strsource(rc), gpgme_strerror(rc));
134
return -1;
135
}
104
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
136
105
137
/* Set GPGME home directory for the OpenPGP engine only */
106
/* Set GPGME home directory */
138
107
rc = gpgme_get_engine_info (&engine_info);
139
108
if (rc != GPG_ERR_NO_ERROR){
140
109
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
150
119
engine_info = engine_info->next;
151
120
}
152
121
if(engine_info == NULL){
153
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
122
fprintf(stderr, "Could not set home dir to %s\n", homedir);
154
123
return -1;
155
124
}
156
125
157
/* Create new GPGME data buffer from memory cryptotext */
158
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
159
0);
126
/* Create new GPGME data buffer from packet buffer */
127
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
160
128
if (rc != GPG_ERR_NO_ERROR){
161
129
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
162
130
gpgme_strsource(rc), gpgme_strerror(rc));
168
136
if (rc != GPG_ERR_NO_ERROR){
169
137
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
170
138
gpgme_strsource(rc), gpgme_strerror(rc));
171
gpgme_data_release(dh_crypto);
172
139
return -1;
173
140
}
174
141
177
144
if (rc != GPG_ERR_NO_ERROR){
178
145
fprintf(stderr, "bad gpgme_new: %s: %s\n",
179
146
gpgme_strsource(rc), gpgme_strerror(rc));
180
plaintext_length = -1;
181
goto decrypt_end;
147
return -1;
182
148
}
183
149
184
/* Decrypt data from the cryptotext data buffer to the plaintext
185
data buffer */
150
/* Decrypt data from the FILE pointer to the plaintext data
151
buffer */
186
152
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
187
153
if (rc != GPG_ERR_NO_ERROR){
188
154
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
189
155
gpgme_strsource(rc), gpgme_strerror(rc));
190
plaintext_length = -1;
191
goto decrypt_end;
156
return -1;
192
157
}
193
158
194
159
if(debug){
195
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
160
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
196
161
}
197
162
198
163
if (debug){
199
164
gpgme_decrypt_result_t result;
200
165
result = gpgme_op_decrypt_result(ctx);
224
189
}
225
190
}
226
191
192
/* Delete the GPGME FILE pointer cryptotext data buffer */
193
gpgme_data_release(dh_crypto);
194
227
195
/* Seek back to the beginning of the GPGME plaintext data buffer */
228
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
229
perror("pgpme_data_seek");
230
plaintext_length = -1;
231
goto decrypt_end;
232
}
233
234
*plaintext = NULL;
196
gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);
197
198
*new_packet = 0;
235
199
while(true){
236
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
237
plaintext_capacity);
238
if (plaintext_capacity == 0){
239
perror("adjustbuffer");
240
plaintext_length = -1;
241
goto decrypt_end;
200
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
201
*new_packet = realloc(*new_packet,
202
(unsigned int)new_packet_capacity
203
+ BUFFER_SIZE);
204
if (*new_packet == NULL){
205
perror("realloc");
206
return -1;
207
}
208
new_packet_capacity += BUFFER_SIZE;
242
209
}
243
210
244
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
211
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
245
212
BUFFER_SIZE);
246
213
/* Print the data, if any */
247
214
if (ret == 0){
248
/* EOF */
249
215
break;
250
216
}
251
217
if(ret < 0){
252
218
perror("gpgme_data_read");
253
plaintext_length = -1;
254
goto decrypt_end;
219
return -1;
255
220
}
256
plaintext_length += ret;
221
new_packet_length += ret;
257
222
}
258
223
259
if(debug){
260
fprintf(stderr, "Decrypted password is: ");
261
for(ssize_t i = 0; i < plaintext_length; i++){
262
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
263
}
264
fprintf(stderr, "\n");
265
}
266
267
decrypt_end:
268
269
/* Delete the GPGME cryptotext data buffer */
270
gpgme_data_release(dh_crypto);
224
/* FIXME: check characters before printing to screen so to not print
225
terminal control characters */
226
/* if(debug){ */
227
/* fprintf(stderr, "decrypted password is: "); */
228
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
229
/* fprintf(stderr, "\n"); */
230
/* } */
271
231
272
232
/* Delete the GPGME plaintext data buffer */
273
233
gpgme_data_release(dh_plain);
274
return plaintext_length;
234
return new_packet_length;
275
235
}
276
236
277
237
static const char * safer_gnutls_strerror (int value) {
281
241
return ret;
282
242
}
283
243
284
/* GnuTLS log function callback */
285
static void debuggnutls(__attribute__((unused)) int level,
286
const char* string){
287
fprintf(stderr, "GnuTLS: %s", string);
244
void debuggnutls(__attribute__((unused)) int level,
245
const char* string){
246
fprintf(stderr, "%s", string);
288
247
}
289
248
290
static int init_gnutls_global(mandos_context *mc){
249
int initgnutls(encrypted_session *es){
250
const char *err;
291
251
int ret;
292
252
293
253
if(debug){
294
254
fprintf(stderr, "Initializing GnuTLS\n");
295
255
}
296
256
297
257
if ((ret = gnutls_global_init ())
298
258
!= GNUTLS_E_SUCCESS) {
299
fprintf (stderr, "GnuTLS global_init: %s\n",
300
safer_gnutls_strerror(ret));
259
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
301
260
return -1;
302
261
}
303
262
304
263
if (debug){
305
/* "Use a log level over 10 to enable all debugging options."
306
* - GnuTLS manual
307
*/
308
264
gnutls_global_set_log_level(11);
309
265
gnutls_global_set_log_function(debuggnutls);
310
266
}
311
267
312
/* OpenPGP credentials */
313
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
268
/* openpgp credentials */
269
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
314
270
!= GNUTLS_E_SUCCESS) {
315
fprintf (stderr, "GnuTLS memory error: %s\n",
271
fprintf (stderr, "memory error: %s\n",
316
272
safer_gnutls_strerror(ret));
317
273
return -1;
318
274
}
319
275
320
276
if(debug){
321
277
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
322
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
323
seckeyfile);
278
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
279
KEYFILE);
324
280
}
325
281
326
282
ret = gnutls_certificate_set_openpgp_key_file
327
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
283
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
328
284
if (ret != GNUTLS_E_SUCCESS) {
329
fprintf(stderr,
330
"Error[%d] while reading the OpenPGP key pair ('%s',"
331
" '%s')\n", ret, pubkeyfile, seckeyfile);
332
fprintf(stdout, "The GnuTLS error is: %s\n",
285
fprintf
286
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
287
" '%s')\n",
288
ret, CERTFILE, KEYFILE);
289
fprintf(stdout, "The Error is: %s\n",
333
290
safer_gnutls_strerror(ret));
334
291
return -1;
335
292
}
336
293
337
/* GnuTLS server initialization */
338
ret = gnutls_dh_params_init(&mc->dh_params);
339
if (ret != GNUTLS_E_SUCCESS) {
340
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
341
" %s\n", safer_gnutls_strerror(ret));
342
return -1;
343
}
344
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
345
if (ret != GNUTLS_E_SUCCESS) {
346
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
347
safer_gnutls_strerror(ret));
348
return -1;
349
}
350
351
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
352
353
return 0;
354
}
355
356
static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){
357
int ret;
358
/* GnuTLS session creation */
359
ret = gnutls_init(session, GNUTLS_SERVER);
360
if (ret != GNUTLS_E_SUCCESS){
294
//GnuTLS server initialization
295
if ((ret = gnutls_dh_params_init (&es->dh_params))
296
!= GNUTLS_E_SUCCESS) {
297
fprintf (stderr, "Error in dh parameter initialization: %s\n",
298
safer_gnutls_strerror(ret));
299
return -1;
300
}
301
302
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "Error in prime generation: %s\n",
305
safer_gnutls_strerror(ret));
306
return -1;
307
}
308
309
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
310
311
// GnuTLS session creation
312
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
313
!= GNUTLS_E_SUCCESS){
361
314
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
362
315
safer_gnutls_strerror(ret));
363
316
}
364
317
365
{
366
const char *err;
367
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
368
if (ret != GNUTLS_E_SUCCESS) {
369
fprintf(stderr, "Syntax error at: %s\n", err);
370
fprintf(stderr, "GnuTLS error: %s\n",
371
safer_gnutls_strerror(ret));
372
return -1;
373
}
318
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf(stderr, "Syntax error at: %s\n", err);
321
fprintf(stderr, "GnuTLS error: %s\n",
322
safer_gnutls_strerror(ret));
323
return -1;
374
324
}
375
325
376
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
377
mc->cred);
378
if (ret != GNUTLS_E_SUCCESS) {
379
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
326
if ((ret = gnutls_credentials_set
327
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
328
!= GNUTLS_E_SUCCESS) {
329
fprintf(stderr, "Error setting a credentials set: %s\n",
380
330
safer_gnutls_strerror(ret));
381
331
return -1;
382
332
}
383
333
384
334
/* ignore client certificate if any. */
385
gnutls_certificate_server_set_request (*session,
335
gnutls_certificate_server_set_request (es->session,
386
336
GNUTLS_CERT_IGNORE);
387
337
388
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
338
gnutls_dh_set_prime_bits (es->session, DH_BITS);
389
339
390
340
return 0;
391
341
}
392
342
393
/* Avahi log function callback */
394
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
395
__attribute__((unused)) const char *txt){}
343
void empty_log(__attribute__((unused)) AvahiLogLevel level,
344
__attribute__((unused)) const char *txt){}
396
345
397
/* Called when a Mandos server is found */
398
static int start_mandos_communication(const char *ip, uint16_t port,
399
AvahiIfIndex if_index,
400
mandos_context *mc){
346
int start_mandos_communication(const char *ip, uint16_t port,
347
unsigned int if_index){
401
348
int ret, tcp_sd;
402
349
struct sockaddr_in6 to;
350
encrypted_session es;
403
351
char *buffer = NULL;
404
352
char *decrypted_buffer;
405
353
size_t buffer_length = 0;
406
354
size_t buffer_capacity = 0;
407
355
ssize_t decrypted_buffer_size;
408
size_t written;
356
size_t written = 0;
409
357
int retval = 0;
410
358
char interface[IF_NAMESIZE];
411
gnutls_session_t session;
412
gnutls_dh_params_t dh_params;
413
414
ret = init_gnutls_session (mc, &session);
415
if (ret != 0){
416
return -1;
417
}
418
359
419
360
if(debug){
420
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
421
ip, port);
361
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
422
362
}
423
363
424
364
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
426
366
perror("socket");
427
367
return -1;
428
368
}
429
430
if(debug){
431
if(if_indextoname((unsigned int)if_index, interface) == NULL){
369
370
if(if_indextoname(if_index, interface) == NULL){
371
if(debug){
432
372
perror("if_indextoname");
433
return -1;
434
373
}
374
return -1;
375
}
376
377
if(debug){
435
378
fprintf(stderr, "Binding to interface %s\n", interface);
436
379
}
437
380
438
381
memset(&to,0,sizeof(to)); /* Spurious warning */
439
382
to.sin6_family = AF_INET6;
440
/* It would be nice to have a way to detect if we were passed an
441
IPv4 address here. Now we assume an IPv6 address. */
442
383
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
443
384
if (ret < 0 ){
444
385
perror("inet_pton");
445
386
return -1;
446
}
387
}
447
388
if(ret == 0){
448
389
fprintf(stderr, "Bad address: %s\n", ip);
449
390
return -1;
453
394
to.sin6_scope_id = (uint32_t)if_index;
454
395
455
396
if(debug){
456
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
457
char addrstr[INET6_ADDRSTRLEN] = "";
458
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
459
sizeof(addrstr)) == NULL){
460
perror("inet_ntop");
461
} else {
462
if(strcmp(addrstr, ip) != 0){
463
fprintf(stderr, "Canonical address form: %s\n", addrstr);
464
}
465
}
397
fprintf(stderr, "Connection to: %s\n", ip);
466
398
}
467
399
468
400
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
470
402
perror("connect");
471
403
return -1;
472
404
}
473
474
const char *out = mandos_protocol_version;
475
written = 0;
476
while (true){
477
size_t out_size = strlen(out);
478
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
479
out_size - written));
480
if (ret == -1){
481
perror("write");
482
retval = -1;
483
goto mandos_end;
484
}
485
written += (size_t)ret;
486
if(written < out_size){
487
continue;
488
} else {
489
if (out == mandos_protocol_version){
490
written = 0;
491
out = "\r\n";
492
} else {
493
break;
494
}
495
}
405
406
ret = initgnutls (&es);
407
if (ret != 0){
408
retval = -1;
409
return -1;
496
410
}
497
411
412
gnutls_transport_set_ptr (es.session,
413
(gnutls_transport_ptr_t) tcp_sd);
414
498
415
if(debug){
499
416
fprintf(stderr, "Establishing TLS session with %s\n", ip);
500
417
}
501
418
502
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
503
504
ret = gnutls_handshake (session);
419
ret = gnutls_handshake (es.session);
505
420
506
421
if (ret != GNUTLS_E_SUCCESS){
507
422
if(debug){
508
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
423
fprintf(stderr, "\n*** Handshake failed ***\n");
509
424
gnutls_perror (ret);
510
425
}
511
426
retval = -1;
512
goto mandos_end;
427
goto exit;
513
428
}
514
429
515
/* Read OpenPGP packet that contains the wanted password */
430
//Retrieve OpenPGP packet that contains the wanted password
516
431
517
432
if(debug){
518
433
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
520
435
}
521
436
522
437
while(true){
523
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
524
if (buffer_capacity == 0){
525
perror("adjustbuffer");
526
retval = -1;
527
goto mandos_end;
438
if (buffer_length + BUFFER_SIZE > buffer_capacity){
439
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
440
if (buffer == NULL){
441
perror("realloc");
442
goto exit;
443
}
444
buffer_capacity += BUFFER_SIZE;
528
445
}
529
446
530
ret = gnutls_record_recv(session, buffer+buffer_length,
531
BUFFER_SIZE);
447
ret = gnutls_record_recv
448
(es.session, buffer+buffer_length, BUFFER_SIZE);
532
449
if (ret == 0){
533
450
break;
534
451
}
538
455
case GNUTLS_E_AGAIN:
539
456
break;
540
457
case GNUTLS_E_REHANDSHAKE:
541
ret = gnutls_handshake (session);
458
ret = gnutls_handshake (es.session);
542
459
if (ret < 0){
543
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
460
fprintf(stderr, "\n*** Handshake failed ***\n");
544
461
gnutls_perror (ret);
545
462
retval = -1;
546
goto mandos_end;
463
goto exit;
547
464
}
548
465
break;
549
466
default:
550
467
fprintf(stderr, "Unknown error while reading data from"
551
" encrypted session with Mandos server\n");
468
" encrypted session with mandos server\n");
552
469
retval = -1;
553
gnutls_bye (session, GNUTLS_SHUT_RDWR);
554
goto mandos_end;
470
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
471
goto exit;
555
472
}
556
473
} else {
557
474
buffer_length += (size_t) ret;
558
475
}
559
476
}
560
477
561
if(debug){
562
fprintf(stderr, "Closing TLS session\n");
563
}
564
565
gnutls_bye (session, GNUTLS_SHUT_RDWR);
566
567
478
if (buffer_length > 0){
568
479
decrypted_buffer_size = pgp_packet_decrypt(buffer,
569
480
buffer_length,
570
481
&decrypted_buffer,
571
keydir);
482
CERT_ROOT);
572
483
if (decrypted_buffer_size >= 0){
573
written = 0;
574
while(written < (size_t) decrypted_buffer_size){
484
while(written < decrypted_buffer_size){
575
485
ret = (int)fwrite (decrypted_buffer + written, 1,
576
486
(size_t)decrypted_buffer_size - written,
577
487
stdout);
590
500
retval = -1;
591
501
}
592
502
}
593
594
/* Shutdown procedure */
595
596
mandos_end:
503
504
//shutdown procedure
505
506
if(debug){
507
fprintf(stderr, "Closing TLS session\n");
508
}
509
597
510
free(buffer);
511
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
512
exit:
598
513
close(tcp_sd);
599
gnutls_deinit (session);
600
gnutls_certificate_free_credentials (mc->cred);
514
gnutls_deinit (es.session);
515
gnutls_certificate_free_credentials (es.cred);
601
516
gnutls_global_deinit ();
602
517
return retval;
603
518
}
604
519
605
static void resolve_callback(AvahiSServiceResolver *r,
606
AvahiIfIndex interface,
607
AVAHI_GCC_UNUSED AvahiProtocol protocol,
608
AvahiResolverEvent event,
609
const char *name,
610
const char *type,
611
const char *domain,
612
const char *host_name,
613
const AvahiAddress *address,
614
uint16_t port,
615
AVAHI_GCC_UNUSED AvahiStringList *txt,
616
AVAHI_GCC_UNUSED AvahiLookupResultFlags
617
flags,
618
void* userdata) {
619
mandos_context *mc = userdata;
520
static AvahiSimplePoll *simple_poll = NULL;
521
static AvahiServer *server = NULL;
522
523
static void resolve_callback(
524
AvahiSServiceResolver *r,
525
AvahiIfIndex interface,
526
AVAHI_GCC_UNUSED AvahiProtocol protocol,
527
AvahiResolverEvent event,
528
const char *name,
529
const char *type,
530
const char *domain,
531
const char *host_name,
532
const AvahiAddress *address,
533
uint16_t port,
534
AVAHI_GCC_UNUSED AvahiStringList *txt,
535
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
536
AVAHI_GCC_UNUSED void* userdata) {
537
620
538
assert(r); /* Spurious warning */
621
539
622
540
/* Called whenever a service has been resolved successfully or
625
543
switch (event) {
626
544
default:
627
545
case AVAHI_RESOLVER_FAILURE:
628
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
629
" of type '%s' in domain '%s': %s\n", name, type, domain,
630
avahi_strerror(avahi_server_errno(mc->server)));
546
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
547
" type '%s' in domain '%s': %s\n", name, type, domain,
548
avahi_strerror(avahi_server_errno(server)));
631
549
break;
632
550
633
551
case AVAHI_RESOLVER_FOUND:
635
553
char ip[AVAHI_ADDRESS_STR_MAX];
636
554
avahi_address_snprint(ip, sizeof(ip), address);
637
555
if(debug){
638
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
639
" port %d\n", name, host_name, ip, interface, port);
556
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
557
" port %d\n", name, host_name, ip, port);
640
558
}
641
int ret = start_mandos_communication(ip, port, interface, mc);
559
int ret = start_mandos_communication(ip, port,
560
(unsigned int) interface);
642
561
if (ret == 0){
643
562
exit(EXIT_SUCCESS);
644
563
}
647
566
avahi_s_service_resolver_free(r);
648
567
}
649
568
650
static void browse_callback( AvahiSServiceBrowser *b,
651
AvahiIfIndex interface,
652
AvahiProtocol protocol,
653
AvahiBrowserEvent event,
654
const char *name,
655
const char *type,
656
const char *domain,
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
658
flags,
659
void* userdata) {
660
mandos_context *mc = userdata;
661
assert(b); /* Spurious warning */
662
663
/* Called whenever a new services becomes available on the LAN or
664
is removed from the LAN */
665
666
switch (event) {
667
default:
668
case AVAHI_BROWSER_FAILURE:
669
670
fprintf(stderr, "(Avahi browser) %s\n",
671
avahi_strerror(avahi_server_errno(mc->server)));
672
avahi_simple_poll_quit(mc->simple_poll);
673
return;
674
675
case AVAHI_BROWSER_NEW:
676
/* We ignore the returned Avahi resolver object. In the callback
677
function we free it. If the Avahi server is terminated before
678
the callback function is called the Avahi server will free the
679
resolver for us. */
680
681
if (!(avahi_s_service_resolver_new(mc->server, interface,
682
protocol, name, type, domain,
683
AVAHI_PROTO_INET6, 0,
684
resolve_callback, mc)))
685
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
686
name, avahi_strerror(avahi_server_errno(mc->server)));
687
break;
688
689
case AVAHI_BROWSER_REMOVE:
690
break;
691
692
case AVAHI_BROWSER_ALL_FOR_NOW:
693
case AVAHI_BROWSER_CACHE_EXHAUSTED:
694
if(debug){
695
fprintf(stderr, "No Mandos server found, still searching...\n");
569
static void browse_callback(
570
AvahiSServiceBrowser *b,
571
AvahiIfIndex interface,
572
AvahiProtocol protocol,
573
AvahiBrowserEvent event,
574
const char *name,
575
const char *type,
576
const char *domain,
577
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
578
void* userdata) {
579
580
AvahiServer *s = userdata;
581
assert(b); /* Spurious warning */
582
583
/* Called whenever a new services becomes available on the LAN or
584
is removed from the LAN */
585
586
switch (event) {
587
default:
588
case AVAHI_BROWSER_FAILURE:
589
590
fprintf(stderr, "(Browser) %s\n",
591
avahi_strerror(avahi_server_errno(server)));
592
avahi_simple_poll_quit(simple_poll);
593
return;
594
595
case AVAHI_BROWSER_NEW:
596
/* We ignore the returned resolver object. In the callback
597
function we free it. If the server is terminated before
598
the callback function is called the server will free
599
the resolver for us. */
600
601
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
602
type, domain,
603
AVAHI_PROTO_INET6, 0,
604
resolve_callback, s)))
605
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
606
avahi_strerror(avahi_server_errno(s)));
607
break;
608
609
case AVAHI_BROWSER_REMOVE:
610
break;
611
612
case AVAHI_BROWSER_ALL_FOR_NOW:
613
case AVAHI_BROWSER_CACHE_EXHAUSTED:
614
break;
696
615
}
697
break;
698
}
699
}
700
701
/* Combines file name and path and returns the malloced new
702
string. some sane checks could/should be added */
703
static const char *combinepath(const char *first, const char *second){
704
size_t f_len = strlen(first);
705
size_t s_len = strlen(second);
706
char *tmp = malloc(f_len + s_len + 2);
707
if (tmp == NULL){
708
return NULL;
709
}
710
if(f_len > 0){
711
memcpy(tmp, first, f_len); /* Spurious warning */
712
}
713
tmp[f_len] = '/';
714
if(s_len > 0){
715
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
716
}
717
tmp[f_len + 1 + s_len] = '\0';
718
return tmp;
719
}
720
721
722
int main(int argc, char *argv[]){
616
}
617
618
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
619
AvahiServerConfig config;
723
620
AvahiSServiceBrowser *sb = NULL;
724
621
int error;
725
622
int ret;
726
int exitcode = EXIT_SUCCESS;
623
int returncode = EXIT_SUCCESS;
727
624
const char *interface = "eth0";
728
struct ifreq network;
729
int sd;
730
uid_t uid;
731
gid_t gid;
732
char *connect_to = NULL;
733
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
734
mandos_context mc = { .simple_poll = NULL, .server = NULL,
735
.dh_bits = 1024, .priority = "SECURE256"};
736
737
{
738
/* Temporary int to get the address of for getopt_long */
739
int debug_int = debug ? 1 : 0;
740
while (true){
741
struct option long_options[] = {
742
{"debug", no_argument, &debug_int, 1},
743
{"connect", required_argument, NULL, 'c'},
744
{"interface", required_argument, NULL, 'i'},
745
{"keydir", required_argument, NULL, 'd'},
746
{"seckey", required_argument, NULL, 's'},
747
{"pubkey", required_argument, NULL, 'p'},
748
{"dh-bits", required_argument, NULL, 'D'},
749
{"priority", required_argument, NULL, 'P'},
750
{0, 0, 0, 0} };
751
752
int option_index = 0;
753
ret = getopt_long (argc, argv, "i:", long_options,
754
&option_index);
755
756
if (ret == -1){
757
break;
758
}
759
760
switch(ret){
761
case 0:
762
break;
763
case 'i':
764
interface = optarg;
765
break;
766
case 'c':
767
connect_to = optarg;
768
break;
769
case 'd':
770
keydir = optarg;
771
break;
772
case 'p':
773
pubkeyfile = optarg;
774
break;
775
case 's':
776
seckeyfile = optarg;
777
break;
778
case 'D':
779
errno = 0;
780
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
781
if (errno){
782
perror("strtol");
783
exit(EXIT_FAILURE);
784
}
785
break;
786
case 'P':
787
mc.priority = optarg;
788
break;
789
case '?':
790
default:
791
/* getopt_long() has already printed a message about the
792
unrcognized option, so just exit. */
793
exit(EXIT_FAILURE);
794
}
795
}
796
/* Set the global debug flag from the temporary int */
797
debug = debug_int ? true : false;
798
}
799
800
pubkeyfile = combinepath(keydir, pubkeyfile);
801
if (pubkeyfile == NULL){
802
perror("combinepath");
803
exitcode = EXIT_FAILURE;
804
goto end;
805
}
806
807
seckeyfile = combinepath(keydir, seckeyfile);
808
if (seckeyfile == NULL){
809
perror("combinepath");
810
goto end;
811
}
812
813
ret = init_gnutls_global(&mc);
814
if (ret == -1){
815
fprintf(stderr, "init_gnutls_global\n");
816
goto end;
817
}
818
819
uid = getuid();
820
gid = getgid();
821
822
ret = setuid(uid);
823
if (ret == -1){
824
perror("setuid");
825
}
826
827
setgid(gid);
828
if (ret == -1){
829
perror("setgid");
830
}
831
832
if_index = (AvahiIfIndex) if_nametoindex(interface);
833
if(if_index == 0){
834
fprintf(stderr, "No such interface: \"%s\"\n", interface);
835
exit(EXIT_FAILURE);
836
}
837
838
if(connect_to != NULL){
839
/* Connect directly, do not use Zeroconf */
840
/* (Mainly meant for debugging) */
841
char *address = strrchr(connect_to, ':');
842
if(address == NULL){
843
fprintf(stderr, "No colon in address\n");
844
exitcode = EXIT_FAILURE;
845
goto end;
846
}
847
errno = 0;
848
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
849
if(errno){
850
perror("Bad port number");
851
exitcode = EXIT_FAILURE;
852
goto end;
853
}
854
*address = '\0';
855
address = connect_to;
856
ret = start_mandos_communication(address, port, if_index, &mc);
857
if(ret < 0){
858
exitcode = EXIT_FAILURE;
859
} else {
860
exitcode = EXIT_SUCCESS;
861
}
862
goto end;
863
}
864
865
/* If the interface is down, bring it up */
866
{
867
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
868
if(sd < 0) {
869
perror("socket");
870
exitcode = EXIT_FAILURE;
871
goto end;
872
}
873
strcpy(network.ifr_name, interface); /* Spurious warning */
874
ret = ioctl(sd, SIOCGIFFLAGS, &network);
875
if(ret == -1){
876
perror("ioctl SIOCGIFFLAGS");
877
exitcode = EXIT_FAILURE;
878
goto end;
879
}
880
if((network.ifr_flags & IFF_UP) == 0){
881
network.ifr_flags |= IFF_UP;
882
ret = ioctl(sd, SIOCSIFFLAGS, &network);
883
if(ret == -1){
884
perror("ioctl SIOCSIFFLAGS");
885
exitcode = EXIT_FAILURE;
886
goto end;
887
}
888
}
889
close(sd);
625
626
while (true){
627
static struct option long_options[] = {
628
{"debug", no_argument, (int *)&debug, 1},
629
{"interface", required_argument, 0, 'i'},
630
{0, 0, 0, 0} };
631
632
int option_index = 0;
633
ret = getopt_long (argc, argv, "i:", long_options,
634
&option_index);
635
636
if (ret == -1){
637
break;
638
}
639
640
switch(ret){
641
case 0:
642
break;
643
case 'i':
644
interface = optarg;
645
break;
646
default:
647
exit(EXIT_FAILURE);
648
}
890
649
}
891
650
892
651
if (not debug){
893
652
avahi_set_log_function(empty_log);
894
653
}
895
654
896
/* Initialize the pseudo-RNG for Avahi */
655
/* Initialize the psuedo-RNG */
897
656
srand((unsigned int) time(NULL));
898
899
/* Allocate main Avahi loop object */
900
mc.simple_poll = avahi_simple_poll_new();
901
if (mc.simple_poll == NULL) {
902
fprintf(stderr, "Avahi: Failed to create simple poll"
903
" object.\n");
904
exitcode = EXIT_FAILURE;
905
goto end;
906
}
907
908
{
909
AvahiServerConfig config;
910
/* Do not publish any local Zeroconf records */
911
avahi_server_config_init(&config);
912
config.publish_hinfo = 0;
913
config.publish_addresses = 0;
914
config.publish_workstation = 0;
915
config.publish_domain = 0;
916
917
/* Allocate a new server */
918
mc.server = avahi_server_new(avahi_simple_poll_get
919
(mc.simple_poll), &config, NULL,
920
NULL, &error);
921
922
/* Free the Avahi configuration data */
923
avahi_server_config_free(&config);
924
}
925
926
/* Check if creating the Avahi server object succeeded */
927
if (mc.server == NULL) {
928
fprintf(stderr, "Failed to create Avahi server: %s\n",
657
658
/* Allocate main loop object */
659
if (!(simple_poll = avahi_simple_poll_new())) {
660
fprintf(stderr, "Failed to create simple poll object.\n");
661
662
goto exit;
663
}
664
665
/* Do not publish any local records */
666
avahi_server_config_init(&config);
667
config.publish_hinfo = 0;
668
config.publish_addresses = 0;
669
config.publish_workstation = 0;
670
config.publish_domain = 0;
671
672
/* Allocate a new server */
673
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
674
&config, NULL, NULL, &error);
675
676
/* Free the configuration data */
677
avahi_server_config_free(&config);
678
679
/* Check if creating the server object succeeded */
680
if (!server) {
681
fprintf(stderr, "Failed to create server: %s\n",
929
682
avahi_strerror(error));
930
exitcode = EXIT_FAILURE;
931
goto end;
683
returncode = EXIT_FAILURE;
684
goto exit;
932
685
}
933
686
934
/* Create the Avahi service browser */
935
sb = avahi_s_service_browser_new(mc.server, if_index,
687
/* Create the service browser */
688
sb = avahi_s_service_browser_new(server,
689
(AvahiIfIndex)
690
if_nametoindex(interface),
936
691
AVAHI_PROTO_INET6,
937
692
"_mandos._tcp", NULL, 0,
938
browse_callback, &mc);
939
if (sb == NULL) {
693
browse_callback, server);
694
if (!sb) {
940
695
fprintf(stderr, "Failed to create service browser: %s\n",
941
avahi_strerror(avahi_server_errno(mc.server)));
942
exitcode = EXIT_FAILURE;
943
goto end;
696
avahi_strerror(avahi_server_errno(server)));
697
returncode = EXIT_FAILURE;
698
goto exit;
944
699
}
945
700
946
701
/* Run the main loop */
947
702
948
703
if (debug){
949
fprintf(stderr, "Starting Avahi loop search\n");
704
fprintf(stderr, "Starting avahi loop search\n");
950
705
}
951
706
952
avahi_simple_poll_loop(mc.simple_poll);
707
avahi_simple_poll_loop(simple_poll);
953
708
954
end:
709
exit:
955
710
956
711
if (debug){
957
712
fprintf(stderr, "%s exiting\n", argv[0]);
958
713
}
959
714
960
715
/* Cleanup things */
961
if (sb != NULL)
716
if (sb)
962
717
avahi_s_service_browser_free(sb);
963
718
964
if (mc.server != NULL)
965
avahi_server_free(mc.server);
966
967
if (mc.simple_poll != NULL)
968
avahi_simple_poll_free(mc.simple_poll);
969
free(pubkeyfile);
970
free(seckeyfile);
971
972
return exitcode;
719
if (server)
720
avahi_server_free(server);
721
722
if (simple_poll)
723
avahi_simple_poll_free(simple_poll);
724
725
return returncode;
973
726
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0