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- Committer: Teddy Hogeborn
- Date: 2008-08-04 16:23:20 UTC
- Revision ID: teddy@fukt.bsnet.se-20080804162320-f53t0btf99kjn57e
* plugins.d/mandosclient.c: Cosmetic changes.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
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() */
40
#include <stdint.h> /* uint16_t, uint32_t */
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
52
#include <sys/stat.h> /* open() */
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
59
#include <assert.h> /* assert() */
60
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
62
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
SIOCSIFFLAGS, if_indextoname(),
64
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
getuid(), getgid(), setuid(),
68
setgid() */
69
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and */
71
#include <argp.h> /* struct argp_option, error_t, struct
72
argp_state, struct argp,
73
argp_parse(), ARGP_KEY_ARG,
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
45
SIOCSIFFLAGS */
75
46
76
/* Avahi */
77
/* All Avahi types, constants and functions
78
Avahi*, avahi_*,
79
AVAHI_* */
80
47
#include <avahi-core/core.h>
81
48
#include <avahi-core/lookup.h>
82
49
#include <avahi-core/log.h>
84
51
#include <avahi-common/malloc.h>
85
52
#include <avahi-common/error.h>
86
53
87
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
90
gnutls_*
91
init_gnutls_session(),
92
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
94
GNUTLS_OPENPGP_FMT_BASE64 */
54
/* Mandos client part */
55
#include <sys/types.h> /* socket(), inet_pton() */
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
struct in6_addr, inet_pton() */
58
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
59
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
95
60
61
#include <unistd.h> /* close() */
62
#include <netinet/in.h>
63
#include <stdbool.h> /* true */
64
#include <string.h> /* memset */
65
#include <arpa/inet.h> /* inet_pton() */
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
96
71
/* GPGME */
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
99
gpgme_*
100
GPGME_PROTOCOL_OpenPGP,
101
GPG_ERR_NO_* */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
102
74
103
75
#define BUFFER_SIZE 256
104
76
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
108
109
77
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
110
79
static const char mandos_protocol_version[] = "1";
111
const char *argp_program_version = "mandos-client " VERSION;
80
const char *argp_program_version = "mandosclient 0.9";
112
81
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
113
82
114
83
/* Used for passing in values through the Avahi callback functions */
119
88
unsigned int dh_bits;
120
89
gnutls_dh_params_t dh_params;
121
90
const char *priority;
122
gpgme_ctx_t ctx;
123
91
} mandos_context;
124
92
125
93
/*
140
108
}
141
109
142
110
/*
143
* Initialize GPGME.
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
144
113
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
int ret;
114
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
size_t crypto_size,
116
char **plaintext,
117
const char *homedir){
118
gpgme_data_t dh_crypto, dh_plain;
119
gpgme_ctx_t ctx;
148
120
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
149
124
gpgme_engine_info_t engine_info;
150
125
151
152
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
154
*/
155
bool import_key(const char *filename){
156
int fd;
157
gpgme_data_t pgp_data;
158
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
if(fd == -1){
161
perror("open");
162
return false;
163
}
164
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
gpgme_strsource(rc), gpgme_strerror(rc));
169
return false;
170
}
171
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
ret = TEMP_FAILURE_RETRY(close(fd));
180
if(ret == -1){
181
perror("close");
182
}
183
gpgme_data_release(pgp_data);
184
return true;
185
}
186
187
126
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
189
128
}
190
129
191
130
/* Init GPGME */
194
133
if (rc != GPG_ERR_NO_ERROR){
195
134
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
135
gpgme_strsource(rc), gpgme_strerror(rc));
197
return false;
136
return -1;
198
137
}
199
138
200
/* Set GPGME home directory for the OpenPGP engine only */
139
/* Set GPGME home directory for the OpenPGP engine only */
201
140
rc = gpgme_get_engine_info (&engine_info);
202
141
if (rc != GPG_ERR_NO_ERROR){
203
142
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
143
gpgme_strsource(rc), gpgme_strerror(rc));
205
return false;
144
return -1;
206
145
}
207
146
while(engine_info != NULL){
208
147
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
209
148
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
210
engine_info->file_name, tempdir);
149
engine_info->file_name, homedir);
211
150
break;
212
151
}
213
152
engine_info = engine_info->next;
214
153
}
215
154
if(engine_info == NULL){
216
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
217
return false;
218
}
219
220
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
225
return false;
226
}
227
228
if (not import_key(pubkey) or not import_key(seckey)){
229
return false;
230
}
231
232
return true;
233
}
234
235
/*
236
* Decrypt OpenPGP data.
237
* Returns -1 on error
238
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
243
gpgme_data_t dh_crypto, dh_plain;
244
gpgme_error_t rc;
245
ssize_t ret;
246
size_t plaintext_capacity = 0;
247
ssize_t plaintext_length = 0;
248
249
if (debug){
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
251
157
}
252
158
253
159
/* Create new GPGME data buffer from memory cryptotext */
268
174
return -1;
269
175
}
270
176
177
/* Create new GPGME "context" */
178
rc = gpgme_new(&ctx);
179
if (rc != GPG_ERR_NO_ERROR){
180
fprintf(stderr, "bad gpgme_new: %s: %s\n",
181
gpgme_strsource(rc), gpgme_strerror(rc));
182
plaintext_length = -1;
183
goto decrypt_end;
184
}
185
271
186
/* Decrypt data from the cryptotext data buffer to the plaintext
272
187
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
274
189
if (rc != GPG_ERR_NO_ERROR){
275
190
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
191
gpgme_strsource(rc), gpgme_strerror(rc));
277
192
plaintext_length = -1;
278
if (debug){
279
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
} else {
284
fprintf(stderr, "Unsupported algorithm: %s\n",
285
result->unsupported_algorithm);
286
fprintf(stderr, "Wrong key usage: %u\n",
287
result->wrong_key_usage);
288
if(result->file_name != NULL){
289
fprintf(stderr, "File name: %s\n", result->file_name);
290
}
291
gpgme_recipient_t recipient;
292
recipient = result->recipients;
293
if(recipient){
294
while(recipient != NULL){
295
fprintf(stderr, "Public key algorithm: %s\n",
296
gpgme_pubkey_algo_name(recipient->pubkey_algo));
297
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
298
fprintf(stderr, "Secret key available: %s\n",
299
recipient->status == GPG_ERR_NO_SECKEY
300
? "No" : "Yes");
301
recipient = recipient->next;
302
}
303
}
304
}
305
}
306
193
goto decrypt_end;
307
194
}
308
195
310
197
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
311
198
}
312
199
200
if (debug){
201
gpgme_decrypt_result_t result;
202
result = gpgme_op_decrypt_result(ctx);
203
if (result == NULL){
204
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
205
} else {
206
fprintf(stderr, "Unsupported algorithm: %s\n",
207
result->unsupported_algorithm);
208
fprintf(stderr, "Wrong key usage: %d\n",
209
result->wrong_key_usage);
210
if(result->file_name != NULL){
211
fprintf(stderr, "File name: %s\n", result->file_name);
212
}
213
gpgme_recipient_t recipient;
214
recipient = result->recipients;
215
if(recipient){
216
while(recipient != NULL){
217
fprintf(stderr, "Public key algorithm: %s\n",
218
gpgme_pubkey_algo_name(recipient->pubkey_algo));
219
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
220
fprintf(stderr, "Secret key available: %s\n",
221
recipient->status == GPG_ERR_NO_SECKEY
222
? "No" : "Yes");
223
recipient = recipient->next;
224
}
225
}
226
}
227
}
228
313
229
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
315
perror("gpgme_data_seek");
231
perror("pgpme_data_seek");
316
232
plaintext_length = -1;
317
233
goto decrypt_end;
318
234
}
342
258
}
343
259
plaintext_length += ret;
344
260
}
345
261
346
262
if(debug){
347
263
fprintf(stderr, "Decrypted password is: ");
348
264
for(ssize_t i = 0; i < plaintext_length; i++){
362
278
}
363
279
364
280
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
281
const char *ret = gnutls_strerror (value);
366
282
if (ret == NULL)
367
283
ret = "(unknown)";
368
284
return ret;
375
291
}
376
292
377
293
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
294
const char *pubkeyfile,
295
const char *seckeyfile){
380
296
int ret;
381
297
382
298
if(debug){
383
299
fprintf(stderr, "Initializing GnuTLS\n");
384
300
}
385
386
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
388
304
fprintf (stderr, "GnuTLS global_init: %s\n",
389
305
safer_gnutls_strerror(ret));
390
306
return -1;
399
315
}
400
316
401
317
/* OpenPGP credentials */
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
406
321
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
408
322
return -1;
409
323
}
410
324
411
325
if(debug){
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
326
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
327
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
328
seckeyfile);
415
329
}
416
330
417
331
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
332
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
420
333
if (ret != GNUTLS_E_SUCCESS) {
421
334
fprintf(stderr,
422
335
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
336
" '%s')\n", ret, pubkeyfile, seckeyfile);
337
fprintf(stdout, "The GnuTLS error is: %s\n",
425
338
safer_gnutls_strerror(ret));
426
goto globalfail;
339
return -1;
427
340
}
428
341
429
342
/* GnuTLS server initialization */
431
344
if (ret != GNUTLS_E_SUCCESS) {
432
345
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
346
" %s\n", safer_gnutls_strerror(ret));
434
goto globalfail;
347
return -1;
435
348
}
436
349
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
350
if (ret != GNUTLS_E_SUCCESS) {
438
351
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
352
safer_gnutls_strerror(ret));
440
goto globalfail;
353
return -1;
441
354
}
442
355
443
356
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
444
357
445
358
return 0;
446
447
globalfail:
448
449
gnutls_certificate_free_credentials(mc->cred);
450
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
452
return -1;
453
359
}
454
360
455
361
static int init_gnutls_session(mandos_context *mc,
469
375
fprintf(stderr, "Syntax error at: %s\n", err);
470
376
fprintf(stderr, "GnuTLS error: %s\n",
471
377
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
473
378
return -1;
474
379
}
475
380
}
479
384
if (ret != GNUTLS_E_SUCCESS) {
480
385
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
386
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
483
387
return -1;
484
388
}
485
389
518
422
}
519
423
520
424
if(debug){
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
522
"\n", ip, port);
425
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
426
ip, port);
523
427
}
524
428
525
429
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
527
431
perror("socket");
528
432
return -1;
529
433
}
530
434
531
435
if(debug){
532
436
if(if_indextoname((unsigned int)if_index, interface) == NULL){
533
437
perror("if_indextoname");
536
440
fprintf(stderr, "Binding to interface %s\n", interface);
537
441
}
538
442
539
memset(&to, 0, sizeof(to));
443
memset(&to,0,sizeof(to)); /* Spurious warning */
540
444
to.in6.sin6_family = AF_INET6;
541
445
/* It would be nice to have a way to detect if we were passed an
542
446
IPv4 address here. Now we assume an IPv6 address. */
549
453
fprintf(stderr, "Bad address: %s\n", ip);
550
454
return -1;
551
455
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
456
to.in6.sin6_port = htons(port); /* Spurious warning */
553
457
554
458
to.in6.sin6_scope_id = (uint32_t)if_index;
555
459
556
460
if(debug){
557
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
558
port);
461
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
559
462
char addrstr[INET6_ADDRSTRLEN] = "";
560
463
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
561
464
sizeof(addrstr)) == NULL){
572
475
perror("connect");
573
476
return -1;
574
477
}
575
478
576
479
const char *out = mandos_protocol_version;
577
480
written = 0;
578
481
while (true){
596
499
}
597
500
}
598
501
}
599
502
600
503
if(debug){
601
504
fprintf(stderr, "Establishing TLS session with %s\n", ip);
602
505
}
603
506
604
507
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
605
508
606
do{
607
ret = gnutls_handshake (session);
608
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
509
ret = gnutls_handshake (session);
609
510
610
511
if (ret != GNUTLS_E_SUCCESS){
611
512
if(debug){
622
523
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
623
524
ip);
624
525
}
625
526
626
527
while(true){
627
528
buffer_capacity = adjustbuffer(&buffer, buffer_length,
628
529
buffer_capacity);
643
544
case GNUTLS_E_AGAIN:
644
545
break;
645
546
case GNUTLS_E_REHANDSHAKE:
646
do{
647
ret = gnutls_handshake (session);
648
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
547
ret = gnutls_handshake (session);
649
548
if (ret < 0){
650
549
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
651
550
gnutls_perror (ret);
672
571
gnutls_bye (session, GNUTLS_SHUT_RDWR);
673
572
674
573
if (buffer_length > 0){
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
574
decrypted_buffer_size = pgp_packet_decrypt(buffer,
676
575
buffer_length,
677
&decrypted_buffer);
576
&decrypted_buffer,
577
keydir);
678
578
if (decrypted_buffer_size >= 0){
679
579
written = 0;
680
580
while(written < (size_t) decrypted_buffer_size){
695
595
} else {
696
596
retval = -1;
697
597
}
698
} else {
699
retval = -1;
700
598
}
701
599
702
600
/* Shutdown procedure */
703
601
704
602
mandos_end:
705
603
free(buffer);
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
707
if(ret == -1){
708
perror("close");
709
}
604
close(tcp_sd);
710
605
gnutls_deinit (session);
606
gnutls_certificate_free_credentials (mc->cred);
607
gnutls_global_deinit ();
711
608
return retval;
712
609
}
713
610
726
623
flags,
727
624
void* userdata) {
728
625
mandos_context *mc = userdata;
729
assert(r);
626
assert(r); /* Spurious warning */
730
627
731
628
/* Called whenever a service has been resolved successfully or
732
629
timed out */
744
641
char ip[AVAHI_ADDRESS_STR_MAX];
745
642
avahi_address_snprint(ip, sizeof(ip), address);
746
643
if(debug){
747
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
644
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
645
" port %d\n", name, host_name, ip, interface, port);
750
646
}
751
647
int ret = start_mandos_communication(ip, port, interface, mc);
752
648
if (ret == 0){
753
avahi_simple_poll_quit(mc->simple_poll);
649
exit(EXIT_SUCCESS);
754
650
}
755
651
}
756
652
}
768
664
flags,
769
665
void* userdata) {
770
666
mandos_context *mc = userdata;
771
assert(b);
667
assert(b); /* Spurious warning */
772
668
773
669
/* Called whenever a new services becomes available on the LAN or
774
670
is removed from the LAN */
808
704
}
809
705
}
810
706
707
/* Combines file name and path and returns the malloced new
708
string. some sane checks could/should be added */
709
static const char *combinepath(const char *first, const char *second){
710
size_t f_len = strlen(first);
711
size_t s_len = strlen(second);
712
char *tmp = malloc(f_len + s_len + 2);
713
if (tmp == NULL){
714
return NULL;
715
}
716
if(f_len > 0){
717
memcpy(tmp, first, f_len); /* Spurious warning */
718
}
719
tmp[f_len] = '/';
720
if(s_len > 0){
721
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
722
}
723
tmp[f_len + 1 + s_len] = '\0';
724
return tmp;
725
}
726
727
811
728
int main(int argc, char *argv[]){
812
729
AvahiSServiceBrowser *sb = NULL;
813
730
int error;
819
736
uid_t uid;
820
737
gid_t gid;
821
738
char *connect_to = NULL;
822
char tempdir[] = "/tmp/mandosXXXXXX";
823
739
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
824
const char *seckey = PATHDIR "/" SECKEY;
825
const char *pubkey = PATHDIR "/" PUBKEY;
826
740
const char *pubkeyfile = "pubkey.txt";
741
const char *seckeyfile = "seckey.txt";
827
742
mandos_context mc = { .simple_poll = NULL, .server = NULL,
828
.dh_bits = 1024, .priority = "SECURE256"
829
":!CTYPE-X.509:+CTYPE-OPENPGP" };
830
bool gnutls_initalized = false;
831
bool gpgme_initalized = false;
743
.dh_bits = 1024, .priority = "SECURE256"};
832
744
833
745
{
834
746
struct argp_option options[] = {
835
747
{ .name = "debug", .key = 128,
836
748
.doc = "Debug mode", .group = 3 },
837
749
{ .name = "connect", .key = 'c',
838
.arg = "ADDRESS:PORT",
839
.doc = "Connect directly to a specific Mandos server",
750
.arg = "IP",
751
.doc = "Connect directly to a sepcified mandos server",
840
752
.group = 1 },
841
753
{ .name = "interface", .key = 'i',
842
.arg = "NAME",
843
.doc = "Interface that will be used to search for Mandos"
844
" servers",
754
.arg = "INTERFACE",
755
.doc = "Interface that Avahi will conntect through",
756
.group = 1 },
757
{ .name = "keydir", .key = 'd',
758
.arg = "KEYDIR",
759
.doc = "Directory where the openpgp keyring is",
845
760
.group = 1 },
846
761
{ .name = "seckey", .key = 's',
847
.arg = "FILE",
848
.doc = "OpenPGP secret key file base name",
762
.arg = "SECKEY",
763
.doc = "Secret openpgp key for gnutls authentication",
849
764
.group = 1 },
850
765
{ .name = "pubkey", .key = 'p',
851
.arg = "FILE",
852
.doc = "OpenPGP public key file base name",
766
.arg = "PUBKEY",
767
.doc = "Public openpgp key for gnutls authentication",
853
768
.group = 2 },
854
769
{ .name = "dh-bits", .key = 129,
855
770
.arg = "BITS",
856
.doc = "Bit length of the prime number used in the"
857
" Diffie-Hellman key exchange",
771
.doc = "dh-bits to use in gnutls communication",
858
772
.group = 2 },
859
773
{ .name = "priority", .key = 130,
860
.arg = "STRING",
861
.doc = "GnuTLS priority string for the TLS handshake",
862
.group = 1 },
774
.arg = "PRIORITY",
775
.doc = "GNUTLS priority", .group = 1 },
863
776
{ .name = NULL }
864
777
};
778
865
779
866
780
error_t parse_opt (int key, char *arg,
867
781
struct argp_state *state) {
868
782
/* Get the INPUT argument from `argp_parse', which we know is
869
783
a pointer to our plugin list pointer. */
870
784
switch (key) {
871
case 128: /* --debug */
785
case 128:
872
786
debug = true;
873
787
break;
874
case 'c': /* --connect */
788
case 'c':
875
789
connect_to = arg;
876
790
break;
877
case 'i': /* --interface */
791
case 'i':
878
792
interface = arg;
879
793
break;
880
case 's': /* --seckey */
881
seckey = arg;
882
break;
883
case 'p': /* --pubkey */
884
pubkey = arg;
885
break;
886
case 129: /* --dh-bits */
794
case 'd':
795
keydir = arg;
796
break;
797
case 's':
798
seckeyfile = arg;
799
break;
800
case 'p':
801
pubkeyfile = arg;
802
break;
803
case 129:
887
804
errno = 0;
888
805
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
889
806
if (errno){
891
808
exit(EXIT_FAILURE);
892
809
}
893
810
break;
894
case 130: /* --priority */
811
case 130:
895
812
mc.priority = arg;
896
813
break;
897
814
case ARGP_KEY_ARG:
898
815
argp_usage (state);
899
case ARGP_KEY_END:
900
816
break;
817
case ARGP_KEY_END:
818
break;
901
819
default:
902
820
return ARGP_ERR_UNKNOWN;
903
821
}
904
822
return 0;
905
823
}
906
824
907
825
struct argp argp = { .options = options, .parser = parse_opt,
908
826
.args_doc = "",
909
827
.doc = "Mandos client -- Get and decrypt"
910
" passwords from a Mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
919
/* If the interface is down, bring it up */
920
{
921
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
if(sd < 0) {
923
perror("socket");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
strcpy(network.ifr_name, interface);
928
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
if(ret == -1){
930
perror("ioctl SIOCGIFFLAGS");
931
exitcode = EXIT_FAILURE;
932
goto end;
933
}
934
if((network.ifr_flags & IFF_UP) == 0){
935
network.ifr_flags |= IFF_UP;
936
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
if(ret == -1){
938
perror("ioctl SIOCSIFFLAGS");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
ret = TEMP_FAILURE_RETRY(close(sd));
944
if(ret == -1){
945
perror("close");
946
}
947
}
948
828
" passwords from mandos server" };
829
argp_parse (&argp, argc, argv, 0, 0, NULL);
830
}
831
832
pubkeyfile = combinepath(keydir, pubkeyfile);
833
if (pubkeyfile == NULL){
834
perror("combinepath");
835
exitcode = EXIT_FAILURE;
836
goto end;
837
}
838
839
seckeyfile = combinepath(keydir, seckeyfile);
840
if (seckeyfile == NULL){
841
perror("combinepath");
842
goto end;
843
}
844
845
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
846
if (ret == -1){
847
fprintf(stderr, "init_gnutls_global\n");
848
goto end;
849
}
850
949
851
uid = getuid();
950
852
gid = getgid();
951
853
952
854
ret = setuid(uid);
953
855
if (ret == -1){
954
856
perror("setuid");
959
861
perror("setgid");
960
862
}
961
863
962
ret = init_gnutls_global(&mc, pubkey, seckey);
963
if (ret == -1){
964
fprintf(stderr, "init_gnutls_global failed\n");
965
exitcode = EXIT_FAILURE;
966
goto end;
967
} else {
968
gnutls_initalized = true;
969
}
970
971
if(mkdtemp(tempdir) == NULL){
972
perror("mkdtemp");
973
tempdir[0] = '\0';
974
goto end;
975
}
976
977
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
978
fprintf(stderr, "gpgme_initalized failed\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
} else {
982
gpgme_initalized = true;
983
}
984
985
864
if_index = (AvahiIfIndex) if_nametoindex(interface);
986
865
if(if_index == 0){
987
866
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1015
894
goto end;
1016
895
}
1017
896
897
/* If the interface is down, bring it up */
898
{
899
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
900
if(sd < 0) {
901
perror("socket");
902
exitcode = EXIT_FAILURE;
903
goto end;
904
}
905
strcpy(network.ifr_name, interface); /* Spurious warning */
906
ret = ioctl(sd, SIOCGIFFLAGS, &network);
907
if(ret == -1){
908
perror("ioctl SIOCGIFFLAGS");
909
exitcode = EXIT_FAILURE;
910
goto end;
911
}
912
if((network.ifr_flags & IFF_UP) == 0){
913
network.ifr_flags |= IFF_UP;
914
ret = ioctl(sd, SIOCSIFFLAGS, &network);
915
if(ret == -1){
916
perror("ioctl SIOCSIFFLAGS");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
close(sd);
922
}
923
1018
924
if (not debug){
1019
925
avahi_set_log_function(empty_log);
1020
926
}
1030
936
exitcode = EXIT_FAILURE;
1031
937
goto end;
1032
938
}
1033
939
1034
940
{
1035
941
AvahiServerConfig config;
1036
942
/* Do not publish any local Zeroconf records */
1039
945
config.publish_addresses = 0;
1040
946
config.publish_workstation = 0;
1041
947
config.publish_domain = 0;
1042
948
1043
949
/* Allocate a new server */
1044
950
mc.server = avahi_server_new(avahi_simple_poll_get
1045
951
(mc.simple_poll), &config, NULL,
1046
952
NULL, &error);
1047
953
1048
954
/* Free the Avahi configuration data */
1049
955
avahi_server_config_free(&config);
1050
956
}
1070
976
}
1071
977
1072
978
/* Run the main loop */
1073
979
1074
980
if (debug){
1075
981
fprintf(stderr, "Starting Avahi loop search\n");
1076
982
}
1078
984
avahi_simple_poll_loop(mc.simple_poll);
1079
985
1080
986
end:
1081
987
1082
988
if (debug){
1083
989
fprintf(stderr, "%s exiting\n", argv[0]);
1084
990
}
1089
995
1090
996
if (mc.server != NULL)
1091
997
avahi_server_free(mc.server);
1092
998
1093
999
if (mc.simple_poll != NULL)
1094
1000
avahi_simple_poll_free(mc.simple_poll);
1095
1096
if (gnutls_initalized){
1097
gnutls_certificate_free_credentials(mc.cred);
1098
gnutls_global_deinit ();
1099
gnutls_dh_params_deinit(mc.dh_params);
1100
}
1101
1102
if(gpgme_initalized){
1103
gpgme_release(mc.ctx);
1104
}
1105
1106
/* Removes the temp directory used by GPGME */
1107
if(tempdir[0] != '\0'){
1108
DIR *d;
1109
struct dirent *direntry;
1110
d = opendir(tempdir);
1111
if(d == NULL){
1112
perror("opendir");
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1001
free(pubkeyfile);
1002
free(seckeyfile);
1003
1143
1004
return exitcode;
1144
1005
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0