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- Committer: Björn Påhlsson
- Date: 2008-08-09 04:49:12 UTC
- mfrom: (52 mandos)
- 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-20080809044912-b4axmz98dv4e09hh
merge
- 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 © 2008,2009 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() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
40
38
#include <stdint.h> /* uint16_t, uint32_t */
41
39
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
40
#include <stdlib.h> /* free() */
44
41
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#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 */
48
45
#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() */
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
53
47
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
48
struct in6_addr, inet_pton(),
55
49
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() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
62
53
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
54
SIOCSIFFLAGS, if_indextoname(),
64
55
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
65
57
#include <netinet/in.h>
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
getuid(), getgid(), setuid(),
68
setgid() */
69
58
#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 */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
75
63
76
64
/* Avahi */
77
/* All Avahi types, constants and functions
78
Avahi*, avahi_*,
79
AVAHI_* */
80
#include <avahi-core/core.h>
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
81
67
#include <avahi-core/lookup.h>
82
#include <avahi-core/log.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
83
69
#include <avahi-common/simple-watch.h>
84
70
#include <avahi-common/malloc.h>
85
71
#include <avahi-common/error.h>
86
72
87
73
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
90
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(),
91
97
init_gnutls_session(),
92
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
94
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 */
95
107
96
108
/* GPGME */
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
99
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()
100
127
GPGME_PROTOCOL_OpenPGP,
101
GPG_ERR_NO_* */
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
102
130
103
131
#define BUFFER_SIZE 256
104
132
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
108
109
133
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
110
135
static const char mandos_protocol_version[] = "1";
111
const char *argp_program_version = "mandos-client " VERSION;
136
const char *argp_program_version = "mandosclient 0.9";
112
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
113
138
114
139
/* Used for passing in values through the Avahi callback functions */
119
144
unsigned int dh_bits;
120
145
gnutls_dh_params_t dh_params;
121
146
const char *priority;
122
gpgme_ctx_t ctx;
123
147
} mandos_context;
124
148
125
149
/*
140
164
}
141
165
142
166
/*
143
* Initialize GPGME.
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
144
169
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
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;
148
176
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
149
180
gpgme_engine_info_t engine_info;
150
181
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 = (int)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 = (int)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
182
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
189
184
}
190
185
191
186
/* Init GPGME */
194
189
if (rc != GPG_ERR_NO_ERROR){
195
190
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
191
gpgme_strsource(rc), gpgme_strerror(rc));
197
return false;
192
return -1;
198
193
}
199
194
200
/* Set GPGME home directory for the OpenPGP engine only */
195
/* Set GPGME home directory for the OpenPGP engine only */
201
196
rc = gpgme_get_engine_info (&engine_info);
202
197
if (rc != GPG_ERR_NO_ERROR){
203
198
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
199
gpgme_strsource(rc), gpgme_strerror(rc));
205
return false;
200
return -1;
206
201
}
207
202
while(engine_info != NULL){
208
203
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
209
204
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
210
engine_info->file_name, tempdir);
205
engine_info->file_name, homedir);
211
206
break;
212
207
}
213
208
engine_info = engine_info->next;
214
209
}
215
210
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");
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
251
213
}
252
214
253
215
/* Create new GPGME data buffer from memory cryptotext */
268
230
return -1;
269
231
}
270
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
271
242
/* Decrypt data from the cryptotext data buffer to the plaintext
272
243
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
274
245
if (rc != GPG_ERR_NO_ERROR){
275
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
247
gpgme_strsource(rc), gpgme_strerror(rc));
277
248
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
249
goto decrypt_end;
307
250
}
308
251
310
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
311
254
}
312
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
313
285
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
315
perror("gpgme_data_seek");
287
perror("pgpme_data_seek");
316
288
plaintext_length = -1;
317
289
goto decrypt_end;
318
290
}
342
314
}
343
315
plaintext_length += ret;
344
316
}
345
317
346
318
if(debug){
347
319
fprintf(stderr, "Decrypted password is: ");
348
320
for(ssize_t i = 0; i < plaintext_length; i++){
362
334
}
363
335
364
336
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
337
const char *ret = gnutls_strerror (value);
366
338
if (ret == NULL)
367
339
ret = "(unknown)";
368
340
return ret;
375
347
}
376
348
377
349
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
350
const char *pubkeyfile,
351
const char *seckeyfile){
380
352
int ret;
381
353
382
354
if(debug){
383
355
fprintf(stderr, "Initializing GnuTLS\n");
384
356
}
385
386
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
388
360
fprintf (stderr, "GnuTLS global_init: %s\n",
389
361
safer_gnutls_strerror(ret));
390
362
return -1;
399
371
}
400
372
401
373
/* 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 */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
406
377
safer_gnutls_strerror(ret));
407
378
gnutls_global_deinit ();
408
379
return -1;
409
380
}
410
381
411
382
if(debug){
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
415
386
}
416
387
417
388
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
420
390
if (ret != GNUTLS_E_SUCCESS) {
421
391
fprintf(stderr,
422
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
425
395
safer_gnutls_strerror(ret));
426
396
goto globalfail;
427
397
}
441
411
}
442
412
443
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
444
414
445
415
return 0;
446
416
447
417
globalfail:
448
418
449
419
gnutls_certificate_free_credentials(mc->cred);
450
420
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
452
421
return -1;
422
453
423
}
454
424
455
425
static int init_gnutls_session(mandos_context *mc,
501
471
AvahiIfIndex if_index,
502
472
mandos_context *mc){
503
473
int ret, tcp_sd;
504
ssize_t sret;
505
474
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
506
475
char *buffer = NULL;
507
476
char *decrypted_buffer;
519
488
}
520
489
521
490
if(debug){
522
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
523
"\n", ip, port);
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
524
493
}
525
494
526
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
528
497
perror("socket");
529
498
return -1;
530
499
}
531
500
532
501
if(debug){
533
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
534
503
perror("if_indextoname");
537
506
fprintf(stderr, "Binding to interface %s\n", interface);
538
507
}
539
508
540
memset(&to, 0, sizeof(to));
509
memset(&to,0,sizeof(to)); /* Spurious warning */
541
510
to.in6.sin6_family = AF_INET6;
542
511
/* It would be nice to have a way to detect if we were passed an
543
512
IPv4 address here. Now we assume an IPv6 address. */
550
519
fprintf(stderr, "Bad address: %s\n", ip);
551
520
return -1;
552
521
}
553
to.in6.sin6_port = htons(port); /* Spurious warning */
522
to.in6.sin6_port = htons(port); /* Spurious warning */
554
523
555
524
to.in6.sin6_scope_id = (uint32_t)if_index;
556
525
557
526
if(debug){
558
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
559
port);
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
560
528
char addrstr[INET6_ADDRSTRLEN] = "";
561
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
562
530
sizeof(addrstr)) == NULL){
573
541
perror("connect");
574
542
return -1;
575
543
}
576
544
577
545
const char *out = mandos_protocol_version;
578
546
written = 0;
579
547
while (true){
580
548
size_t out_size = strlen(out);
581
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
549
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
550
out_size - written));
583
551
if (ret == -1){
584
552
perror("write");
597
565
}
598
566
}
599
567
}
600
568
601
569
if(debug){
602
570
fprintf(stderr, "Establishing TLS session with %s\n", ip);
603
571
}
604
572
605
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
606
574
607
do{
608
ret = gnutls_handshake (session);
609
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
575
ret = gnutls_handshake (session);
610
576
611
577
if (ret != GNUTLS_E_SUCCESS){
612
578
if(debug){
623
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
624
590
ip);
625
591
}
626
592
627
593
while(true){
628
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
629
595
buffer_capacity);
633
599
goto mandos_end;
634
600
}
635
601
636
sret = gnutls_record_recv(session, buffer+buffer_length,
637
BUFFER_SIZE);
638
if (sret == 0){
602
ret = gnutls_record_recv(session, buffer+buffer_length,
603
BUFFER_SIZE);
604
if (ret == 0){
639
605
break;
640
606
}
641
if (sret < 0){
642
switch(sret){
607
if (ret < 0){
608
switch(ret){
643
609
case GNUTLS_E_INTERRUPTED:
644
610
case GNUTLS_E_AGAIN:
645
611
break;
646
612
case GNUTLS_E_REHANDSHAKE:
647
do{
648
ret = gnutls_handshake (session);
649
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
ret = gnutls_handshake (session);
650
614
if (ret < 0){
651
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
652
616
gnutls_perror (ret);
662
626
goto mandos_end;
663
627
}
664
628
} else {
665
buffer_length += (size_t) sret;
629
buffer_length += (size_t) ret;
666
630
}
667
631
}
668
632
673
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
638
675
639
if (buffer_length > 0){
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
641
buffer_length,
678
&decrypted_buffer);
642
&decrypted_buffer,
643
keydir);
679
644
if (decrypted_buffer_size >= 0){
680
645
written = 0;
681
646
while(written < (size_t) decrypted_buffer_size){
696
661
} else {
697
662
retval = -1;
698
663
}
699
} else {
700
retval = -1;
701
664
}
702
665
703
666
/* Shutdown procedure */
704
667
705
668
mandos_end:
706
669
free(buffer);
707
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
708
if(ret == -1){
709
perror("close");
710
}
670
close(tcp_sd);
711
671
gnutls_deinit (session);
712
672
return retval;
713
673
}
727
687
flags,
728
688
void* userdata) {
729
689
mandos_context *mc = userdata;
730
assert(r);
690
assert(r); /* Spurious warning */
731
691
732
692
/* Called whenever a service has been resolved successfully or
733
693
timed out */
745
705
char ip[AVAHI_ADDRESS_STR_MAX];
746
706
avahi_address_snprint(ip, sizeof(ip), address);
747
707
if(debug){
748
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
751
710
}
752
711
int ret = start_mandos_communication(ip, port, interface, mc);
753
712
if (ret == 0){
754
avahi_simple_poll_quit(mc->simple_poll);
713
exit(EXIT_SUCCESS);
755
714
}
756
715
}
757
716
}
769
728
flags,
770
729
void* userdata) {
771
730
mandos_context *mc = userdata;
772
assert(b);
731
assert(b); /* Spurious warning */
773
732
774
733
/* Called whenever a new services becomes available on the LAN or
775
734
is removed from the LAN */
809
768
}
810
769
}
811
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
812
792
int main(int argc, char *argv[]){
813
793
AvahiSServiceBrowser *sb = NULL;
814
794
int error;
820
800
uid_t uid;
821
801
gid_t gid;
822
802
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
824
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
827
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
828
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
807
.dh_bits = 1024, .priority = "SECURE256"};
831
808
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
833
809
834
810
{
835
811
struct argp_option options[] = {
836
812
{ .name = "debug", .key = 128,
837
813
.doc = "Debug mode", .group = 3 },
838
814
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
841
817
.group = 1 },
842
818
{ .name = "interface", .key = 'i',
843
.arg = "NAME",
844
.doc = "Interface that will be used to search for Mandos"
845
" 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",
846
825
.group = 1 },
847
826
{ .name = "seckey", .key = 's',
848
.arg = "FILE",
849
.doc = "OpenPGP secret key file base name",
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
850
829
.group = 1 },
851
830
{ .name = "pubkey", .key = 'p',
852
.arg = "FILE",
853
.doc = "OpenPGP public key file base name",
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
854
833
.group = 2 },
855
834
{ .name = "dh-bits", .key = 129,
856
835
.arg = "BITS",
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
836
.doc = "dh-bits to use in gnutls communication",
859
837
.group = 2 },
860
838
{ .name = "priority", .key = 130,
861
.arg = "STRING",
862
.doc = "GnuTLS priority string for the TLS handshake",
863
.group = 1 },
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
864
841
{ .name = NULL }
865
842
};
843
866
844
867
845
error_t parse_opt (int key, char *arg,
868
846
struct argp_state *state) {
869
847
/* Get the INPUT argument from `argp_parse', which we know is
870
848
a pointer to our plugin list pointer. */
871
849
switch (key) {
872
case 128: /* --debug */
850
case 128:
873
851
debug = true;
874
852
break;
875
case 'c': /* --connect */
853
case 'c':
876
854
connect_to = arg;
877
855
break;
878
case 'i': /* --interface */
856
case 'i':
879
857
interface = arg;
880
858
break;
881
case 's': /* --seckey */
882
seckey = arg;
883
break;
884
case 'p': /* --pubkey */
885
pubkey = arg;
886
break;
887
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:
888
869
errno = 0;
889
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
890
871
if (errno){
892
873
exit(EXIT_FAILURE);
893
874
}
894
875
break;
895
case 130: /* --priority */
876
case 130:
896
877
mc.priority = arg;
897
878
break;
898
879
case ARGP_KEY_ARG:
899
880
argp_usage (state);
900
case ARGP_KEY_END:
901
881
break;
882
case ARGP_KEY_END:
883
break;
902
884
default:
903
885
return ARGP_ERR_UNKNOWN;
904
886
}
905
887
return 0;
906
888
}
907
889
908
890
struct argp argp = { .options = options, .parser = parse_opt,
909
891
.args_doc = "",
910
892
.doc = "Mandos client -- Get and decrypt"
911
" passwords from a Mandos server" };
912
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
913
if (ret == ARGP_ERR_UNKNOWN){
914
fprintf(stderr, "Unknown error while parsing arguments\n");
915
exitcode = EXIT_FAILURE;
916
goto end;
917
}
918
}
919
920
/* If the interface is down, bring it up */
921
{
922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
923
if(sd < 0) {
924
perror("socket");
925
exitcode = EXIT_FAILURE;
926
goto end;
927
}
928
strcpy(network.ifr_name, interface);
929
ret = ioctl(sd, SIOCGIFFLAGS, &network);
930
if(ret == -1){
931
perror("ioctl SIOCGIFFLAGS");
932
exitcode = EXIT_FAILURE;
933
goto end;
934
}
935
if((network.ifr_flags & IFF_UP) == 0){
936
network.ifr_flags |= IFF_UP;
937
ret = ioctl(sd, SIOCSIFFLAGS, &network);
938
if(ret == -1){
939
perror("ioctl SIOCSIFFLAGS");
940
exitcode = EXIT_FAILURE;
941
goto end;
942
}
943
}
944
ret = (int)TEMP_FAILURE_RETRY(close(sd));
945
if(ret == -1){
946
perror("close");
947
}
948
}
949
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
950
918
uid = getuid();
951
919
gid = getgid();
952
920
953
921
ret = setuid(uid);
954
922
if (ret == -1){
955
923
perror("setuid");
960
928
perror("setgid");
961
929
}
962
930
963
ret = init_gnutls_global(&mc, pubkey, seckey);
964
if (ret == -1){
965
fprintf(stderr, "init_gnutls_global failed\n");
966
exitcode = EXIT_FAILURE;
967
goto end;
968
} else {
969
gnutls_initalized = true;
970
}
971
972
if(mkdtemp(tempdir) == NULL){
973
perror("mkdtemp");
974
tempdir[0] = '\0';
975
goto end;
976
}
977
978
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
979
fprintf(stderr, "gpgme_initalized failed\n");
980
exitcode = EXIT_FAILURE;
981
goto end;
982
} else {
983
gpgme_initalized = true;
984
}
985
986
931
if_index = (AvahiIfIndex) if_nametoindex(interface);
987
932
if(if_index == 0){
988
933
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1016
961
goto end;
1017
962
}
1018
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
1019
991
if (not debug){
1020
992
avahi_set_log_function(empty_log);
1021
993
}
1031
1003
exitcode = EXIT_FAILURE;
1032
1004
goto end;
1033
1005
}
1034
1006
1035
1007
{
1036
1008
AvahiServerConfig config;
1037
1009
/* Do not publish any local Zeroconf records */
1040
1012
config.publish_addresses = 0;
1041
1013
config.publish_workstation = 0;
1042
1014
config.publish_domain = 0;
1043
1015
1044
1016
/* Allocate a new server */
1045
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1046
1018
(mc.simple_poll), &config, NULL,
1047
1019
NULL, &error);
1048
1020
1049
1021
/* Free the Avahi configuration data */
1050
1022
avahi_server_config_free(&config);
1051
1023
}
1071
1043
}
1072
1044
1073
1045
/* Run the main loop */
1074
1046
1075
1047
if (debug){
1076
1048
fprintf(stderr, "Starting Avahi loop search\n");
1077
1049
}
1079
1051
avahi_simple_poll_loop(mc.simple_poll);
1080
1052
1081
1053
end:
1082
1054
1083
1055
if (debug){
1084
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1085
1057
}
1090
1062
1091
1063
if (mc.server != NULL)
1092
1064
avahi_server_free(mc.server);
1093
1065
1094
1066
if (mc.simple_poll != NULL)
1095
1067
avahi_simple_poll_free(mc.simple_poll);
1096
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1097
1071
if (gnutls_initalized){
1098
gnutls_certificate_free_credentials(mc.cred);
1072
gnutls_certificate_free_credentials (mc.cred);
1099
1073
gnutls_global_deinit ();
1100
gnutls_dh_params_deinit(mc.dh_params);
1101
}
1102
1103
if(gpgme_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
closedir(d);
1137
}
1138
ret = rmdir(tempdir);
1139
if(ret == -1){
1140
perror("rmdir");
1141
}
1142
}
1143
1074
}
1075
1144
1076
return exitcode;
1145
1077
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0