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24.1.26
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: plugins.d/password-request.c
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- Committer: Björn Påhlsson
- Date: 2008-08-09 04:42:39 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 53.
- Revision ID: belorn@braxen-20080809044239-a1ub3rvi88ydwvla
tally count of used symbols
return codes from functions checked.
return codes from functions checked.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn 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
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
#define PATHDIR "/conf/conf.d/mandos"
105
#define SECKEY "seckey.txt"
106
#define PUBKEY "pubkey.txt"
107
108
133
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
109
135
static const char mandos_protocol_version[] = "1";
110
const char *argp_program_version = "mandos-client " VERSION;
136
const char *argp_program_version = "mandosclient 0.9";
111
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
112
138
113
139
/* Used for passing in values through the Avahi callback functions */
118
144
unsigned int dh_bits;
119
145
gnutls_dh_params_t dh_params;
120
146
const char *priority;
121
gpgme_ctx_t ctx;
122
147
} mandos_context;
123
148
124
149
/*
139
164
}
140
165
141
166
/*
142
* Initialize GPGME.
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
143
169
*/
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
145
const char *pubkey, const char *tempdir){
146
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;
147
176
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
148
180
gpgme_engine_info_t engine_info;
149
181
150
151
/*
152
* Helper function to insert pub and seckey to the enigne keyring.
153
*/
154
bool import_key(const char *filename){
155
int fd;
156
gpgme_data_t pgp_data;
157
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
if(fd == -1){
160
perror("open");
161
return false;
162
}
163
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
165
if (rc != GPG_ERR_NO_ERROR){
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
167
gpgme_strsource(rc), gpgme_strerror(rc));
168
return false;
169
}
170
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
174
gpgme_strsource(rc), gpgme_strerror(rc));
175
return false;
176
}
177
178
ret = TEMP_FAILURE_RETRY(close(fd));
179
if(ret == -1){
180
perror("close");
181
}
182
gpgme_data_release(pgp_data);
183
return true;
184
}
185
186
182
if (debug){
187
fprintf(stderr, "Initialize gpgme\n");
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
188
184
}
189
185
190
186
/* Init GPGME */
193
189
if (rc != GPG_ERR_NO_ERROR){
194
190
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
195
191
gpgme_strsource(rc), gpgme_strerror(rc));
196
return false;
192
return -1;
197
193
}
198
194
199
/* Set GPGME home directory for the OpenPGP engine only */
195
/* Set GPGME home directory for the OpenPGP engine only */
200
196
rc = gpgme_get_engine_info (&engine_info);
201
197
if (rc != GPG_ERR_NO_ERROR){
202
198
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
203
199
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
200
return -1;
205
201
}
206
202
while(engine_info != NULL){
207
203
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
208
204
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
209
engine_info->file_name, tempdir);
205
engine_info->file_name, homedir);
210
206
break;
211
207
}
212
208
engine_info = engine_info->next;
213
209
}
214
210
if(engine_info == NULL){
215
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
216
return false;
217
}
218
219
/* Create new GPGME "context" */
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
224
return false;
225
}
226
227
if (not import_key(pubkey) or not import_key(seckey)){
228
return false;
229
}
230
231
return true;
232
}
233
234
/*
235
* Decrypt OpenPGP data.
236
* Returns -1 on error
237
*/
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
242
gpgme_data_t dh_crypto, dh_plain;
243
gpgme_error_t rc;
244
ssize_t ret;
245
size_t plaintext_capacity = 0;
246
ssize_t plaintext_length = 0;
247
248
if (debug){
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
250
213
}
251
214
252
215
/* Create new GPGME data buffer from memory cryptotext */
267
230
return -1;
268
231
}
269
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
270
242
/* Decrypt data from the cryptotext data buffer to the plaintext
271
243
data buffer */
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
273
245
if (rc != GPG_ERR_NO_ERROR){
274
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
275
247
gpgme_strsource(rc), gpgme_strerror(rc));
276
248
plaintext_length = -1;
277
if (debug){
278
gpgme_decrypt_result_t result;
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
282
} else {
283
fprintf(stderr, "Unsupported algorithm: %s\n",
284
result->unsupported_algorithm);
285
fprintf(stderr, "Wrong key usage: %u\n",
286
result->wrong_key_usage);
287
if(result->file_name != NULL){
288
fprintf(stderr, "File name: %s\n", result->file_name);
289
}
290
gpgme_recipient_t recipient;
291
recipient = result->recipients;
292
if(recipient){
293
while(recipient != NULL){
294
fprintf(stderr, "Public key algorithm: %s\n",
295
gpgme_pubkey_algo_name(recipient->pubkey_algo));
296
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
297
fprintf(stderr, "Secret key available: %s\n",
298
recipient->status == GPG_ERR_NO_SECKEY
299
? "No" : "Yes");
300
recipient = recipient->next;
301
}
302
}
303
}
304
}
305
249
goto decrypt_end;
306
250
}
307
251
309
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
310
254
}
311
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
312
285
/* Seek back to the beginning of the GPGME plaintext data buffer */
313
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
314
perror("gpgme_data_seek");
287
perror("pgpme_data_seek");
315
288
plaintext_length = -1;
316
289
goto decrypt_end;
317
290
}
341
314
}
342
315
plaintext_length += ret;
343
316
}
344
317
345
318
if(debug){
346
319
fprintf(stderr, "Decrypted password is: ");
347
320
for(ssize_t i = 0; i < plaintext_length; i++){
361
334
}
362
335
363
336
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
337
const char *ret = gnutls_strerror (value);
365
338
if (ret == NULL)
366
339
ret = "(unknown)";
367
340
return ret;
374
347
}
375
348
376
349
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
378
const char *seckeyfilename){
350
const char *pubkeyfile,
351
const char *seckeyfile){
379
352
int ret;
380
353
381
354
if(debug){
382
355
fprintf(stderr, "Initializing GnuTLS\n");
383
356
}
384
385
ret = gnutls_global_init();
386
if (ret != GNUTLS_E_SUCCESS) {
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
387
360
fprintf (stderr, "GnuTLS global_init: %s\n",
388
361
safer_gnutls_strerror(ret));
389
362
return -1;
398
371
}
399
372
400
373
/* OpenPGP credentials */
401
gnutls_certificate_allocate_credentials(&mc->cred);
402
if (ret != GNUTLS_E_SUCCESS){
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
405
377
safer_gnutls_strerror(ret));
406
378
gnutls_global_deinit ();
407
379
return -1;
408
380
}
409
381
410
382
if(debug){
411
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
412
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
413
seckeyfilename);
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
414
386
}
415
387
416
388
ret = gnutls_certificate_set_openpgp_key_file
417
(mc->cred, pubkeyfilename, seckeyfilename,
418
GNUTLS_OPENPGP_FMT_BASE64);
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
419
390
if (ret != GNUTLS_E_SUCCESS) {
420
391
fprintf(stderr,
421
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
423
fprintf(stderr, "The GnuTLS error is: %s\n",
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
424
395
safer_gnutls_strerror(ret));
425
396
goto globalfail;
426
397
}
440
411
}
441
412
442
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
443
414
444
415
return 0;
445
416
446
417
globalfail:
447
418
448
419
gnutls_certificate_free_credentials(mc->cred);
449
420
gnutls_global_deinit();
450
gnutls_dh_params_deinit(mc->dh_params);
451
421
return -1;
422
452
423
}
453
424
454
425
static int init_gnutls_session(mandos_context *mc,
517
488
}
518
489
519
490
if(debug){
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
521
"\n", ip, port);
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
522
493
}
523
494
524
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
497
perror("socket");
527
498
return -1;
528
499
}
529
500
530
501
if(debug){
531
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
532
503
perror("if_indextoname");
535
506
fprintf(stderr, "Binding to interface %s\n", interface);
536
507
}
537
508
538
memset(&to, 0, sizeof(to));
509
memset(&to,0,sizeof(to)); /* Spurious warning */
539
510
to.in6.sin6_family = AF_INET6;
540
511
/* It would be nice to have a way to detect if we were passed an
541
512
IPv4 address here. Now we assume an IPv6 address. */
548
519
fprintf(stderr, "Bad address: %s\n", ip);
549
520
return -1;
550
521
}
551
to.in6.sin6_port = htons(port); /* Spurious warning */
522
to.in6.sin6_port = htons(port); /* Spurious warning */
552
523
553
524
to.in6.sin6_scope_id = (uint32_t)if_index;
554
525
555
526
if(debug){
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
558
528
char addrstr[INET6_ADDRSTRLEN] = "";
559
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
560
530
sizeof(addrstr)) == NULL){
571
541
perror("connect");
572
542
return -1;
573
543
}
574
544
575
545
const char *out = mandos_protocol_version;
576
546
written = 0;
577
547
while (true){
595
565
}
596
566
}
597
567
}
598
568
599
569
if(debug){
600
570
fprintf(stderr, "Establishing TLS session with %s\n", ip);
601
571
}
602
572
603
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
604
574
605
do{
606
ret = gnutls_handshake (session);
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
575
ret = gnutls_handshake (session);
608
576
609
577
if (ret != GNUTLS_E_SUCCESS){
610
578
if(debug){
621
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
622
590
ip);
623
591
}
624
592
625
593
while(true){
626
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
627
595
buffer_capacity);
642
610
case GNUTLS_E_AGAIN:
643
611
break;
644
612
case GNUTLS_E_REHANDSHAKE:
645
do{
646
ret = gnutls_handshake (session);
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
ret = gnutls_handshake (session);
648
614
if (ret < 0){
649
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
650
616
gnutls_perror (ret);
671
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
672
638
673
639
if (buffer_length > 0){
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
675
641
buffer_length,
676
&decrypted_buffer);
642
&decrypted_buffer,
643
keydir);
677
644
if (decrypted_buffer_size >= 0){
678
645
written = 0;
679
646
while(written < (size_t) decrypted_buffer_size){
694
661
} else {
695
662
retval = -1;
696
663
}
697
} else {
698
retval = -1;
699
664
}
700
665
701
666
/* Shutdown procedure */
702
667
703
668
mandos_end:
704
669
free(buffer);
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
706
if(ret == -1){
707
perror("close");
708
}
670
close(tcp_sd);
709
671
gnutls_deinit (session);
710
672
return retval;
711
673
}
725
687
flags,
726
688
void* userdata) {
727
689
mandos_context *mc = userdata;
728
assert(r);
690
assert(r); /* Spurious warning */
729
691
730
692
/* Called whenever a service has been resolved successfully or
731
693
timed out */
743
705
char ip[AVAHI_ADDRESS_STR_MAX];
744
706
avahi_address_snprint(ip, sizeof(ip), address);
745
707
if(debug){
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
749
710
}
750
711
int ret = start_mandos_communication(ip, port, interface, mc);
751
712
if (ret == 0){
752
avahi_simple_poll_quit(mc->simple_poll);
713
exit(EXIT_SUCCESS);
753
714
}
754
715
}
755
716
}
767
728
flags,
768
729
void* userdata) {
769
730
mandos_context *mc = userdata;
770
assert(b);
731
assert(b); /* Spurious warning */
771
732
772
733
/* Called whenever a new services becomes available on the LAN or
773
734
is removed from the LAN */
807
768
}
808
769
}
809
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
810
792
int main(int argc, char *argv[]){
811
793
AvahiSServiceBrowser *sb = NULL;
812
794
int error;
818
800
uid_t uid;
819
801
gid_t gid;
820
802
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
826
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
807
.dh_bits = 1024, .priority = "SECURE256"};
829
808
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
831
809
832
810
{
833
811
struct argp_option options[] = {
834
812
{ .name = "debug", .key = 128,
835
813
.doc = "Debug mode", .group = 3 },
836
814
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
839
817
.group = 1 },
840
818
{ .name = "interface", .key = 'i',
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" 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",
844
825
.group = 1 },
845
826
{ .name = "seckey", .key = 's',
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
848
829
.group = 1 },
849
830
{ .name = "pubkey", .key = 'p',
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
852
833
.group = 2 },
853
834
{ .name = "dh-bits", .key = 129,
854
835
.arg = "BITS",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
836
.doc = "dh-bits to use in gnutls communication",
857
837
.group = 2 },
858
838
{ .name = "priority", .key = 130,
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
862
841
{ .name = NULL }
863
842
};
843
864
844
865
845
error_t parse_opt (int key, char *arg,
866
846
struct argp_state *state) {
867
847
/* Get the INPUT argument from `argp_parse', which we know is
868
848
a pointer to our plugin list pointer. */
869
849
switch (key) {
870
case 128: /* --debug */
850
case 128:
871
851
debug = true;
872
852
break;
873
case 'c': /* --connect */
853
case 'c':
874
854
connect_to = arg;
875
855
break;
876
case 'i': /* --interface */
856
case 'i':
877
857
interface = arg;
878
858
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
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:
886
869
errno = 0;
887
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
871
if (errno){
890
873
exit(EXIT_FAILURE);
891
874
}
892
875
break;
893
case 130: /* --priority */
876
case 130:
894
877
mc.priority = arg;
895
878
break;
896
879
case ARGP_KEY_ARG:
897
880
argp_usage (state);
898
case ARGP_KEY_END:
899
881
break;
882
case ARGP_KEY_END:
883
break;
900
884
default:
901
885
return ARGP_ERR_UNKNOWN;
902
886
}
903
887
return 0;
904
888
}
905
889
906
890
struct argp argp = { .options = options, .parser = parse_opt,
907
891
.args_doc = "",
908
892
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
}
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
928
if(ret == -1){
929
perror("ioctl SIOCGIFFLAGS");
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
943
if(ret == -1){
944
perror("close");
945
}
946
}
947
893
" passwords from mandos server" };
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
895
}
896
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
899
perror("combinepath");
900
exitcode = EXIT_FAILURE;
901
goto end;
902
}
903
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
906
perror("combinepath");
907
goto end;
908
}
909
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
911
if (ret == -1){
912
fprintf(stderr, "init_gnutls_global\n");
913
goto end;
914
} else {
915
gnutls_initalized = true;
916
}
917
948
918
uid = getuid();
949
919
gid = getgid();
950
920
951
921
ret = setuid(uid);
952
922
if (ret == -1){
953
923
perror("setuid");
958
928
perror("setgid");
959
929
}
960
930
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
982
}
983
984
931
if_index = (AvahiIfIndex) if_nametoindex(interface);
985
932
if(if_index == 0){
986
933
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1014
961
goto end;
1015
962
}
1016
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
1017
991
if (not debug){
1018
992
avahi_set_log_function(empty_log);
1019
993
}
1029
1003
exitcode = EXIT_FAILURE;
1030
1004
goto end;
1031
1005
}
1032
1006
1033
1007
{
1034
1008
AvahiServerConfig config;
1035
1009
/* Do not publish any local Zeroconf records */
1038
1012
config.publish_addresses = 0;
1039
1013
config.publish_workstation = 0;
1040
1014
config.publish_domain = 0;
1041
1015
1042
1016
/* Allocate a new server */
1043
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1044
1018
(mc.simple_poll), &config, NULL,
1045
1019
NULL, &error);
1046
1020
1047
1021
/* Free the Avahi configuration data */
1048
1022
avahi_server_config_free(&config);
1049
1023
}
1069
1043
}
1070
1044
1071
1045
/* Run the main loop */
1072
1046
1073
1047
if (debug){
1074
1048
fprintf(stderr, "Starting Avahi loop search\n");
1075
1049
}
1077
1051
avahi_simple_poll_loop(mc.simple_poll);
1078
1052
1079
1053
end:
1080
1054
1081
1055
if (debug){
1082
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1083
1057
}
1088
1062
1089
1063
if (mc.server != NULL)
1090
1064
avahi_server_free(mc.server);
1091
1065
1092
1066
if (mc.simple_poll != NULL)
1093
1067
avahi_simple_poll_free(mc.simple_poll);
1094
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1095
1071
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1072
gnutls_certificate_free_credentials (mc.cred);
1097
1073
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1111
perror("opendir");
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1074
}
1075
1142
1076
return exitcode;
1143
1077
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0