To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandosclient.c
- browse files at revision 43
- compare with another revision
- download diff
- download tarball
- view history from revision 43
- 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:
- .bzrignore
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/password-request.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
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() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#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() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
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() */
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 */
61
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
SIOCSIFFLAGS, if_indextoname(),
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
#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 */
45
SIOCSIFFLAGS */
74
46
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
79
47
#include <avahi-core/core.h>
80
48
#include <avahi-core/lookup.h>
81
49
#include <avahi-core/log.h>
83
51
#include <avahi-common/malloc.h>
84
52
#include <avahi-common/error.h>
85
53
86
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
90
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
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 */
94
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() */
95
71
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
101
74
102
75
#define BUFFER_SIZE 256
103
76
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
77
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
113
79
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "password-request 1.0";
80
const char *argp_program_version = "mandosclient 0.9";
115
81
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
82
117
83
/* Used for passing in values through the Avahi callback functions */
122
88
unsigned int dh_bits;
123
89
gnutls_dh_params_t dh_params;
124
90
const char *priority;
125
gpgme_ctx_t ctx;
126
91
} mandos_context;
127
92
128
93
/*
143
108
}
144
109
145
110
/*
146
* Initialize GPGME.
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
147
113
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
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;
151
120
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
152
124
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
125
190
126
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
192
128
}
193
129
194
130
/* Init GPGME */
195
131
gpgme_check_version(NULL);
196
132
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
133
if (rc != GPG_ERR_NO_ERROR){
198
134
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
135
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
136
return -1;
201
137
}
202
203
/* Set GPGME home directory for the OpenPGP engine only */
138
139
/* Set GPGME home directory for the OpenPGP engine only */
204
140
rc = gpgme_get_engine_info (&engine_info);
205
141
if (rc != GPG_ERR_NO_ERROR){
206
142
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
143
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
144
return -1;
209
145
}
210
146
while(engine_info != NULL){
211
147
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
148
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
149
engine_info->file_name, homedir);
214
150
break;
215
151
}
216
152
engine_info = engine_info->next;
217
153
}
218
154
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");
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
254
157
}
255
158
256
159
/* Create new GPGME data buffer from memory cryptotext */
271
174
return -1;
272
175
}
273
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
274
186
/* Decrypt data from the cryptotext data buffer to the plaintext
275
187
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
189
if (rc != GPG_ERR_NO_ERROR){
278
190
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
191
gpgme_strsource(rc), gpgme_strerror(rc));
280
192
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
193
goto decrypt_end;
310
194
}
311
195
313
197
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
198
}
315
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
316
229
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
318
231
perror("pgpme_data_seek");
345
258
}
346
259
plaintext_length += ret;
347
260
}
348
261
349
262
if(debug){
350
263
fprintf(stderr, "Decrypted password is: ");
351
264
for(ssize_t i = 0; i < plaintext_length; i++){
365
278
}
366
279
367
280
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
281
const char *ret = gnutls_strerror (value);
369
282
if (ret == NULL)
370
283
ret = "(unknown)";
371
284
return ret;
378
291
}
379
292
380
293
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
294
const char *pubkeyfile,
295
const char *seckeyfile){
383
296
int ret;
384
297
385
298
if(debug){
386
299
fprintf(stderr, "Initializing GnuTLS\n");
387
300
}
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
391
304
fprintf (stderr, "GnuTLS global_init: %s\n",
392
305
safer_gnutls_strerror(ret));
393
306
return -1;
402
315
}
403
316
404
317
/* 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 */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
409
321
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
411
322
return -1;
412
323
}
413
324
414
325
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
326
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
327
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
328
seckeyfile);
418
329
}
419
330
420
331
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
332
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
423
333
if (ret != GNUTLS_E_SUCCESS) {
424
334
fprintf(stderr,
425
335
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
336
" '%s')\n", ret, pubkeyfile, seckeyfile);
337
fprintf(stdout, "The GnuTLS error is: %s\n",
428
338
safer_gnutls_strerror(ret));
429
goto globalfail;
339
return -1;
430
340
}
431
341
432
342
/* GnuTLS server initialization */
434
344
if (ret != GNUTLS_E_SUCCESS) {
435
345
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
346
" %s\n", safer_gnutls_strerror(ret));
437
goto globalfail;
347
return -1;
438
348
}
439
349
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
350
if (ret != GNUTLS_E_SUCCESS) {
441
351
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
352
safer_gnutls_strerror(ret));
443
goto globalfail;
353
return -1;
444
354
}
445
355
446
356
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
357
448
358
return 0;
449
450
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
return -1;
455
359
}
456
360
457
361
static int init_gnutls_session(mandos_context *mc,
471
375
fprintf(stderr, "Syntax error at: %s\n", err);
472
376
fprintf(stderr, "GnuTLS error: %s\n",
473
377
safer_gnutls_strerror(ret));
474
gnutls_deinit (*session);
475
378
return -1;
476
379
}
477
380
}
481
384
if (ret != GNUTLS_E_SUCCESS) {
482
385
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
483
386
safer_gnutls_strerror(ret));
484
gnutls_deinit (*session);
485
387
return -1;
486
388
}
487
389
520
422
}
521
423
522
424
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
425
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
426
ip, port);
525
427
}
526
428
527
429
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
431
perror("socket");
530
432
return -1;
531
433
}
532
434
533
435
if(debug){
534
436
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
437
perror("if_indextoname");
538
440
fprintf(stderr, "Binding to interface %s\n", interface);
539
441
}
540
442
541
memset(&to, 0, sizeof(to));
443
memset(&to,0,sizeof(to)); /* Spurious warning */
542
444
to.in6.sin6_family = AF_INET6;
543
445
/* It would be nice to have a way to detect if we were passed an
544
446
IPv4 address here. Now we assume an IPv6 address. */
551
453
fprintf(stderr, "Bad address: %s\n", ip);
552
454
return -1;
553
455
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
456
to.in6.sin6_port = htons(port); /* Spurious warning */
555
457
556
458
to.in6.sin6_scope_id = (uint32_t)if_index;
557
459
558
460
if(debug){
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
461
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
561
462
char addrstr[INET6_ADDRSTRLEN] = "";
562
463
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
563
464
sizeof(addrstr)) == NULL){
574
475
perror("connect");
575
476
return -1;
576
477
}
577
478
578
479
const char *out = mandos_protocol_version;
579
480
written = 0;
580
481
while (true){
598
499
}
599
500
}
600
501
}
601
502
602
503
if(debug){
603
504
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
505
}
605
506
606
507
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
508
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
509
ret = gnutls_handshake (session);
611
510
612
511
if (ret != GNUTLS_E_SUCCESS){
613
512
if(debug){
624
523
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
625
524
ip);
626
525
}
627
526
628
527
while(true){
629
528
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
529
buffer_capacity);
645
544
case GNUTLS_E_AGAIN:
646
545
break;
647
546
case GNUTLS_E_REHANDSHAKE:
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
547
ret = gnutls_handshake (session);
651
548
if (ret < 0){
652
549
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
653
550
gnutls_perror (ret);
674
571
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
572
676
573
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
574
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
575
buffer_length,
679
&decrypted_buffer);
576
&decrypted_buffer,
577
keydir);
680
578
if (decrypted_buffer_size >= 0){
681
579
written = 0;
682
580
while(written < (size_t) decrypted_buffer_size){
697
595
} else {
698
596
retval = -1;
699
597
}
700
} else {
701
retval = -1;
702
598
}
703
599
704
600
/* Shutdown procedure */
705
601
706
602
mandos_end:
707
603
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
604
close(tcp_sd);
712
605
gnutls_deinit (session);
606
gnutls_certificate_free_credentials (mc->cred);
607
gnutls_global_deinit ();
713
608
return retval;
714
609
}
715
610
728
623
flags,
729
624
void* userdata) {
730
625
mandos_context *mc = userdata;
731
assert(r);
626
assert(r); /* Spurious warning */
732
627
733
628
/* Called whenever a service has been resolved successfully or
734
629
timed out */
746
641
char ip[AVAHI_ADDRESS_STR_MAX];
747
642
avahi_address_snprint(ip, sizeof(ip), address);
748
643
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);
644
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
645
" port %d\n", name, host_name, ip, interface, port);
752
646
}
753
647
int ret = start_mandos_communication(ip, port, interface, mc);
754
648
if (ret == 0){
755
avahi_simple_poll_quit(mc->simple_poll);
649
exit(EXIT_SUCCESS);
756
650
}
757
651
}
758
652
}
770
664
flags,
771
665
void* userdata) {
772
666
mandos_context *mc = userdata;
773
assert(b);
667
assert(b); /* Spurious warning */
774
668
775
669
/* Called whenever a new services becomes available on the LAN or
776
670
is removed from the LAN */
810
704
}
811
705
}
812
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
813
728
int main(int argc, char *argv[]){
814
729
AvahiSServiceBrowser *sb = NULL;
815
730
int error;
821
736
uid_t uid;
822
737
gid_t gid;
823
738
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
739
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
740
const char *pubkeyfile = "pubkey.txt";
741
const char *seckeyfile = "seckey.txt";
829
742
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
743
.dh_bits = 1024, .priority = "SECURE256"};
834
744
835
745
{
836
746
struct argp_option options[] = {
837
747
{ .name = "debug", .key = 128,
838
748
.doc = "Debug mode", .group = 3 },
839
749
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
750
.arg = "IP",
751
.doc = "Connect directly to a sepcified mandos server",
842
752
.group = 1 },
843
753
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" 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",
847
760
.group = 1 },
848
761
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
762
.arg = "SECKEY",
763
.doc = "Secret openpgp key for gnutls authentication",
851
764
.group = 1 },
852
765
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
766
.arg = "PUBKEY",
767
.doc = "Public openpgp key for gnutls authentication",
855
768
.group = 2 },
856
769
{ .name = "dh-bits", .key = 129,
857
770
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
771
.doc = "dh-bits to use in gnutls communication",
860
772
.group = 2 },
861
773
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
774
.arg = "PRIORITY",
775
.doc = "GNUTLS priority", .group = 1 },
865
776
{ .name = NULL }
866
777
};
778
867
779
868
780
error_t parse_opt (int key, char *arg,
869
781
struct argp_state *state) {
870
782
/* Get the INPUT argument from `argp_parse', which we know is
871
783
a pointer to our plugin list pointer. */
872
784
switch (key) {
873
case 128: /* --debug */
785
case 128:
874
786
debug = true;
875
787
break;
876
case 'c': /* --connect */
788
case 'c':
877
789
connect_to = arg;
878
790
break;
879
case 'i': /* --interface */
791
case 'i':
880
792
interface = arg;
881
793
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
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:
889
804
errno = 0;
890
805
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
806
if (errno){
893
808
exit(EXIT_FAILURE);
894
809
}
895
810
break;
896
case 130: /* --priority */
811
case 130:
897
812
mc.priority = arg;
898
813
break;
899
814
case ARGP_KEY_ARG:
900
815
argp_usage (state);
901
case ARGP_KEY_END:
902
816
break;
817
case ARGP_KEY_END:
818
break;
903
819
default:
904
820
return ARGP_ERR_UNKNOWN;
905
821
}
906
822
return 0;
907
823
}
908
824
909
825
struct argp argp = { .options = options, .parser = parse_opt,
910
826
.args_doc = "",
911
827
.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
}
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;
919
837
}
920
838
921
ret = init_gnutls_global(&mc, pubkey, seckey);
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);
922
846
if (ret == -1){
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
847
fprintf(stderr, "init_gnutls_global\n");
925
848
goto end;
926
} else {
927
gnutls_initalized = true;
928
849
}
929
850
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
851
uid = getuid();
975
852
gid = getgid();
976
853
977
854
ret = setuid(uid);
978
855
if (ret == -1){
979
856
perror("setuid");
1017
894
goto end;
1018
895
}
1019
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
1020
924
if (not debug){
1021
925
avahi_set_log_function(empty_log);
1022
926
}
1032
936
exitcode = EXIT_FAILURE;
1033
937
goto end;
1034
938
}
1035
939
1036
940
{
1037
941
AvahiServerConfig config;
1038
942
/* Do not publish any local Zeroconf records */
1041
945
config.publish_addresses = 0;
1042
946
config.publish_workstation = 0;
1043
947
config.publish_domain = 0;
1044
948
1045
949
/* Allocate a new server */
1046
950
mc.server = avahi_server_new(avahi_simple_poll_get
1047
951
(mc.simple_poll), &config, NULL,
1048
952
NULL, &error);
1049
953
1050
954
/* Free the Avahi configuration data */
1051
955
avahi_server_config_free(&config);
1052
956
}
1072
976
}
1073
977
1074
978
/* Run the main loop */
1075
979
1076
980
if (debug){
1077
981
fprintf(stderr, "Starting Avahi loop search\n");
1078
982
}
1080
984
avahi_simple_poll_loop(mc.simple_poll);
1081
985
1082
986
end:
1083
987
1084
988
if (debug){
1085
989
fprintf(stderr, "%s exiting\n", argv[0]);
1086
990
}
1091
995
1092
996
if (mc.server != NULL)
1093
997
avahi_server_free(mc.server);
1094
998
1095
999
if (mc.simple_poll != NULL)
1096
1000
avahi_simple_poll_free(mc.simple_poll);
1001
free(pubkeyfile);
1002
free(seckeyfile);
1097
1003
1098
if (gnutls_initalized){
1099
gnutls_certificate_free_credentials(mc.cred);
1100
gnutls_global_deinit ();
1101
}
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
1143
1004
return exitcode;
1144
1005
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0