To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/password-request.c
- browse files at revision 53
- compare with another revision
- download diff
- download tarball
- view history from revision 53
- 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:
- .bzrignore
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
39
38
#include <stdint.h> /* uint16_t, uint32_t */
40
39
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
40
#include <stdlib.h> /* free() */
43
41
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#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 */
47
45
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
52
47
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
48
struct in6_addr, inet_pton(),
54
49
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
#include <assert.h> /* assert() */
59
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
61
53
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
54
SIOCSIFFLAGS, if_indextoname(),
63
55
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
64
57
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
58
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
70
#include <argp.h> /* struct argp_option, error_t, struct
71
argp_state, struct argp,
72
argp_parse(), ARGP_KEY_ARG,
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
74
63
75
64
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
79
#include <avahi-core/core.h>
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
80
67
#include <avahi-core/lookup.h>
81
#include <avahi-core/log.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
82
69
#include <avahi-common/simple-watch.h>
83
70
#include <avahi-common/malloc.h>
84
71
#include <avahi-common/error.h>
85
72
86
73
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
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(),
90
97
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
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 */
94
107
95
108
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
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()
99
127
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
101
130
102
131
#define BUFFER_SIZE 256
103
132
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pupkey.txt"
111
112
133
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
113
135
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "password-request 1.0";
136
const char *argp_program_version = "mandosclient 0.9";
115
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
138
117
139
/* Used for passing in values through the Avahi callback functions */
122
144
unsigned int dh_bits;
123
145
gnutls_dh_params_t dh_params;
124
146
const char *priority;
125
gpgme_ctx_t ctx;
126
147
} mandos_context;
127
148
128
149
/*
143
164
}
144
165
145
166
/*
146
* Initialize GPGME.
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
147
169
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
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;
151
176
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
152
180
gpgme_engine_info_t engine_info;
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
181
190
182
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
192
184
}
193
185
194
186
/* Init GPGME */
195
187
gpgme_check_version(NULL);
196
188
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
189
if (rc != GPG_ERR_NO_ERROR){
198
190
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
191
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
192
return -1;
201
193
}
202
203
/* Set GPGME home directory for the OpenPGP engine only */
194
195
/* Set GPGME home directory for the OpenPGP engine only */
204
196
rc = gpgme_get_engine_info (&engine_info);
205
197
if (rc != GPG_ERR_NO_ERROR){
206
198
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
199
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
200
return -1;
209
201
}
210
202
while(engine_info != NULL){
211
203
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
204
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
205
engine_info->file_name, homedir);
214
206
break;
215
207
}
216
208
engine_info = engine_info->next;
217
209
}
218
210
if(engine_info == NULL){
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if (not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if (debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
254
213
}
255
214
256
215
/* Create new GPGME data buffer from memory cryptotext */
271
230
return -1;
272
231
}
273
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
274
242
/* Decrypt data from the cryptotext data buffer to the plaintext
275
243
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
245
if (rc != GPG_ERR_NO_ERROR){
278
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
247
gpgme_strsource(rc), gpgme_strerror(rc));
280
248
plaintext_length = -1;
281
if (debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
306
}
307
}
308
}
309
249
goto decrypt_end;
310
250
}
311
251
313
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
254
}
315
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
316
285
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
318
287
perror("pgpme_data_seek");
345
314
}
346
315
plaintext_length += ret;
347
316
}
348
317
349
318
if(debug){
350
319
fprintf(stderr, "Decrypted password is: ");
351
320
for(ssize_t i = 0; i < plaintext_length; i++){
365
334
}
366
335
367
336
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
337
const char *ret = gnutls_strerror (value);
369
338
if (ret == NULL)
370
339
ret = "(unknown)";
371
340
return ret;
378
347
}
379
348
380
349
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
350
const char *pubkeyfile,
351
const char *seckeyfile){
383
352
int ret;
384
353
385
354
if(debug){
386
355
fprintf(stderr, "Initializing GnuTLS\n");
387
356
}
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
391
360
fprintf (stderr, "GnuTLS global_init: %s\n",
392
361
safer_gnutls_strerror(ret));
393
362
return -1;
402
371
}
403
372
404
373
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
409
377
safer_gnutls_strerror(ret));
410
378
gnutls_global_deinit ();
411
379
return -1;
412
380
}
413
381
414
382
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
418
386
}
419
387
420
388
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
423
390
if (ret != GNUTLS_E_SUCCESS) {
424
391
fprintf(stderr,
425
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
428
395
safer_gnutls_strerror(ret));
429
396
goto globalfail;
430
397
}
444
411
}
445
412
446
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
414
448
415
return 0;
449
416
450
417
globalfail:
451
418
452
419
gnutls_certificate_free_credentials(mc->cred);
453
420
gnutls_global_deinit();
454
421
return -1;
422
455
423
}
456
424
457
425
static int init_gnutls_session(mandos_context *mc,
520
488
}
521
489
522
490
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
525
493
}
526
494
527
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
497
perror("socket");
530
498
return -1;
531
499
}
532
500
533
501
if(debug){
534
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
503
perror("if_indextoname");
538
506
fprintf(stderr, "Binding to interface %s\n", interface);
539
507
}
540
508
541
memset(&to, 0, sizeof(to));
509
memset(&to,0,sizeof(to)); /* Spurious warning */
542
510
to.in6.sin6_family = AF_INET6;
543
511
/* It would be nice to have a way to detect if we were passed an
544
512
IPv4 address here. Now we assume an IPv6 address. */
551
519
fprintf(stderr, "Bad address: %s\n", ip);
552
520
return -1;
553
521
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
522
to.in6.sin6_port = htons(port); /* Spurious warning */
555
523
556
524
to.in6.sin6_scope_id = (uint32_t)if_index;
557
525
558
526
if(debug){
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
561
528
char addrstr[INET6_ADDRSTRLEN] = "";
562
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
563
530
sizeof(addrstr)) == NULL){
574
541
perror("connect");
575
542
return -1;
576
543
}
577
544
578
545
const char *out = mandos_protocol_version;
579
546
written = 0;
580
547
while (true){
598
565
}
599
566
}
600
567
}
601
568
602
569
if(debug){
603
570
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
571
}
605
572
606
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
574
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
575
ret = gnutls_handshake (session);
611
576
612
577
if (ret != GNUTLS_E_SUCCESS){
613
578
if(debug){
624
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
625
590
ip);
626
591
}
627
592
628
593
while(true){
629
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
595
buffer_capacity);
645
610
case GNUTLS_E_AGAIN:
646
611
break;
647
612
case GNUTLS_E_REHANDSHAKE:
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
ret = gnutls_handshake (session);
651
614
if (ret < 0){
652
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
653
616
gnutls_perror (ret);
674
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
638
676
639
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
641
buffer_length,
679
&decrypted_buffer);
642
&decrypted_buffer,
643
keydir);
680
644
if (decrypted_buffer_size >= 0){
681
645
written = 0;
682
646
while(written < (size_t) decrypted_buffer_size){
697
661
} else {
698
662
retval = -1;
699
663
}
700
} else {
701
retval = -1;
702
664
}
703
665
704
666
/* Shutdown procedure */
705
667
706
668
mandos_end:
707
669
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
670
close(tcp_sd);
712
671
gnutls_deinit (session);
713
672
return retval;
714
673
}
728
687
flags,
729
688
void* userdata) {
730
689
mandos_context *mc = userdata;
731
assert(r);
690
assert(r); /* Spurious warning */
732
691
733
692
/* Called whenever a service has been resolved successfully or
734
693
timed out */
746
705
char ip[AVAHI_ADDRESS_STR_MAX];
747
706
avahi_address_snprint(ip, sizeof(ip), address);
748
707
if(debug){
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
752
710
}
753
711
int ret = start_mandos_communication(ip, port, interface, mc);
754
712
if (ret == 0){
755
avahi_simple_poll_quit(mc->simple_poll);
713
exit(EXIT_SUCCESS);
756
714
}
757
715
}
758
716
}
770
728
flags,
771
729
void* userdata) {
772
730
mandos_context *mc = userdata;
773
assert(b);
731
assert(b); /* Spurious warning */
774
732
775
733
/* Called whenever a new services becomes available on the LAN or
776
734
is removed from the LAN */
810
768
}
811
769
}
812
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
813
792
int main(int argc, char *argv[]){
814
793
AvahiSServiceBrowser *sb = NULL;
815
794
int error;
821
800
uid_t uid;
822
801
gid_t gid;
823
802
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
829
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
807
.dh_bits = 1024, .priority = "SECURE256"};
832
808
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
834
809
835
810
{
836
811
struct argp_option options[] = {
837
812
{ .name = "debug", .key = 128,
838
813
.doc = "Debug mode", .group = 3 },
839
814
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
842
817
.group = 1 },
843
818
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
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",
847
825
.group = 1 },
848
826
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
851
829
.group = 1 },
852
830
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
855
833
.group = 2 },
856
834
{ .name = "dh-bits", .key = 129,
857
835
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
836
.doc = "dh-bits to use in gnutls communication",
860
837
.group = 2 },
861
838
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
865
841
{ .name = NULL }
866
842
};
843
867
844
868
845
error_t parse_opt (int key, char *arg,
869
846
struct argp_state *state) {
870
847
/* Get the INPUT argument from `argp_parse', which we know is
871
848
a pointer to our plugin list pointer. */
872
849
switch (key) {
873
case 128: /* --debug */
850
case 128:
874
851
debug = true;
875
852
break;
876
case 'c': /* --connect */
853
case 'c':
877
854
connect_to = arg;
878
855
break;
879
case 'i': /* --interface */
856
case 'i':
880
857
interface = arg;
881
858
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
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:
889
869
errno = 0;
890
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
871
if (errno){
893
873
exit(EXIT_FAILURE);
894
874
}
895
875
break;
896
case 130: /* --priority */
876
case 130:
897
877
mc.priority = arg;
898
878
break;
899
879
case ARGP_KEY_ARG:
900
880
argp_usage (state);
901
case ARGP_KEY_END:
902
881
break;
882
case ARGP_KEY_END:
883
break;
903
884
default:
904
885
return ARGP_ERR_UNKNOWN;
905
886
}
906
887
return 0;
907
888
}
908
889
909
890
struct argp argp = { .options = options, .parser = parse_opt,
910
891
.args_doc = "",
911
892
.doc = "Mandos client -- Get and decrypt"
912
" passwords from a Mandos server" };
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
915
fprintf(stderr, "Unknown error while parsing arguments\n");
916
exitcode = EXIT_FAILURE;
917
goto end;
918
}
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;
919
902
}
920
903
921
ret = init_gnutls_global(&mc, pubkey, seckey);
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);
922
911
if (ret == -1){
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
912
fprintf(stderr, "init_gnutls_global\n");
925
913
goto end;
926
914
} else {
927
915
gnutls_initalized = true;
928
916
}
929
917
930
if(mkdtemp(tempdir) == NULL){
931
perror("mkdtemp");
932
tempdir[0] = '\0';
933
goto end;
934
}
935
936
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
937
fprintf(stderr, "pgpme_initalized failed\n");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
} else {
941
pgpme_initalized = true;
942
}
943
944
/* If the interface is down, bring it up */
945
{
946
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
947
if(sd < 0) {
948
perror("socket");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
strcpy(network.ifr_name, interface);
953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
954
if(ret == -1){
955
perror("ioctl SIOCGIFFLAGS");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
if((network.ifr_flags & IFF_UP) == 0){
960
network.ifr_flags |= IFF_UP;
961
ret = ioctl(sd, SIOCSIFFLAGS, &network);
962
if(ret == -1){
963
perror("ioctl SIOCSIFFLAGS");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
}
967
}
968
ret = TEMP_FAILURE_RETRY(close(sd));
969
if(ret == -1){
970
perror("close");
971
}
972
}
973
974
918
uid = getuid();
975
919
gid = getgid();
976
920
977
921
ret = setuid(uid);
978
922
if (ret == -1){
979
923
perror("setuid");
1017
961
goto end;
1018
962
}
1019
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 */
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
974
if(ret == -1){
975
perror("ioctl SIOCGIFFLAGS");
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
1020
991
if (not debug){
1021
992
avahi_set_log_function(empty_log);
1022
993
}
1032
1003
exitcode = EXIT_FAILURE;
1033
1004
goto end;
1034
1005
}
1035
1006
1036
1007
{
1037
1008
AvahiServerConfig config;
1038
1009
/* Do not publish any local Zeroconf records */
1041
1012
config.publish_addresses = 0;
1042
1013
config.publish_workstation = 0;
1043
1014
config.publish_domain = 0;
1044
1015
1045
1016
/* Allocate a new server */
1046
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1047
1018
(mc.simple_poll), &config, NULL,
1048
1019
NULL, &error);
1049
1020
1050
1021
/* Free the Avahi configuration data */
1051
1022
avahi_server_config_free(&config);
1052
1023
}
1072
1043
}
1073
1044
1074
1045
/* Run the main loop */
1075
1046
1076
1047
if (debug){
1077
1048
fprintf(stderr, "Starting Avahi loop search\n");
1078
1049
}
1080
1051
avahi_simple_poll_loop(mc.simple_poll);
1081
1052
1082
1053
end:
1083
1054
1084
1055
if (debug){
1085
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1086
1057
}
1091
1062
1092
1063
if (mc.server != NULL)
1093
1064
avahi_server_free(mc.server);
1094
1065
1095
1066
if (mc.simple_poll != NULL)
1096
1067
avahi_simple_poll_free(mc.simple_poll);
1097
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1098
1071
if (gnutls_initalized){
1099
gnutls_certificate_free_credentials(mc.cred);
1072
gnutls_certificate_free_credentials (mc.cred);
1100
1073
gnutls_global_deinit ();
1101
1074
}
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1075
1143
1076
return exitcode;
1144
1077
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0