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- Committer: Teddy Hogeborn
- Date: 2008-09-13 19:20:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20080913192050-gxuo0jv4o25jn848
* TODO: Minor changes.
- files added:
- etc-plugins.d-README
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos-client - get and decrypt data from a Mandos server
3
* Mandos client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
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
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
36
38
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
38
stdout, ferror() */
41
39
#include <stdint.h> /* uint16_t, uint32_t */
42
40
#include <stddef.h> /* NULL, size_t, ssize_t */
43
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
42
srand() */
45
#include <stdbool.h> /* bool, false, true */
43
#include <stdbool.h> /* bool, true */
46
44
#include <string.h> /* memset(), strcmp(), strlen(),
47
45
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
53
51
#include <sys/stat.h> /* open() */
54
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
inet_pton(), connect() */
53
struct in6_addr, inet_pton(),
54
connect() */
56
55
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
60
58
#include <assert.h> /* assert() */
61
59
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
60
#include <time.h> /* time() */
63
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
62
SIOCSIFFLAGS, if_indextoname(),
65
63
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
64
#include <netinet/in.h>
69
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
66
getuid(), getgid(), setuid(),
71
67
setgid() */
72
68
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
69
#include <iso646.h> /* not, and */
74
70
#include <argp.h> /* struct argp_option, error_t, struct
75
71
argp_state, struct argp,
76
72
argp_parse(), ARGP_KEY_ARG,
77
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(), sigaction(), SIGTERM, sigaction */
79
#ifdef __linux__
80
#include <sys/klog.h> /* klogctl() */
81
#endif
82
74
83
75
/* Avahi */
84
76
/* All Avahi types, constants and functions
97
89
gnutls_*
98
90
init_gnutls_session(),
99
91
GNUTLS_* */
100
#include <gnutls/openpgp.h>
101
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
102
93
GNUTLS_OPENPGP_FMT_BASE64 */
103
94
104
95
/* GPGME */
110
101
111
102
#define BUFFER_SIZE 256
112
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
113
108
#define PATHDIR "/conf/conf.d/mandos"
114
109
#define SECKEY "seckey.txt"
115
110
#define PUBKEY "pubkey.txt"
116
111
117
112
bool debug = false;
118
113
static const char mandos_protocol_version[] = "1";
119
const char *argp_program_version = "mandos-client " VERSION;
114
const char *argp_program_version = "mandos-client 1.0";
120
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
121
116
122
117
/* Used for passing in values through the Avahi callback functions */
130
125
gpgme_ctx_t ctx;
131
126
} mandos_context;
132
127
133
/* global context so signal handler can reach it*/
134
mandos_context mc = { .simple_poll = NULL, .server = NULL,
135
.dh_bits = 1024, .priority = "SECURE256"
136
":!CTYPE-X.509:+CTYPE-OPENPGP" };
137
138
128
/*
139
* Make additional room in "buffer" for at least BUFFER_SIZE
140
* additional bytes. "buffer_capacity" is how much is currently
141
* allocated, "buffer_length" is how much is already used.
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
142
132
*/
143
size_t incbuffer(char **buffer, size_t buffer_length,
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
144
134
size_t buffer_capacity){
145
if(buffer_length + BUFFER_SIZE > buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
146
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
147
if(buffer == NULL){
137
if (buffer == NULL){
148
138
return 0;
149
139
}
150
140
buffer_capacity += BUFFER_SIZE;
155
145
/*
156
146
* Initialize GPGME.
157
147
*/
158
static bool init_gpgme(const char *seckey,
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
159
149
const char *pubkey, const char *tempdir){
160
150
int ret;
161
151
gpgme_error_t rc;
163
153
164
154
165
155
/*
166
* Helper function to insert pub and seckey to the engine keyring.
156
* Helper function to insert pub and seckey to the enigne keyring.
167
157
*/
168
158
bool import_key(const char *filename){
169
159
int fd;
170
160
gpgme_data_t pgp_data;
171
161
172
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
173
163
if(fd == -1){
174
164
perror("open");
175
165
return false;
176
166
}
177
167
178
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
179
if(rc != GPG_ERR_NO_ERROR){
169
if (rc != GPG_ERR_NO_ERROR){
180
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
181
171
gpgme_strsource(rc), gpgme_strerror(rc));
182
172
return false;
183
173
}
184
174
185
rc = gpgme_op_import(mc.ctx, pgp_data);
186
if(rc != GPG_ERR_NO_ERROR){
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
187
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
188
178
gpgme_strsource(rc), gpgme_strerror(rc));
189
179
return false;
190
180
}
191
181
192
ret = (int)TEMP_FAILURE_RETRY(close(fd));
182
ret = TEMP_FAILURE_RETRY(close(fd));
193
183
if(ret == -1){
194
184
perror("close");
195
185
}
197
187
return true;
198
188
}
199
189
200
if(debug){
190
if (debug){
201
191
fprintf(stderr, "Initialize gpgme\n");
202
192
}
203
193
204
194
/* Init GPGME */
205
195
gpgme_check_version(NULL);
206
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
207
if(rc != GPG_ERR_NO_ERROR){
197
if (rc != GPG_ERR_NO_ERROR){
208
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
209
199
gpgme_strsource(rc), gpgme_strerror(rc));
210
200
return false;
211
201
}
212
202
213
203
/* Set GPGME home directory for the OpenPGP engine only */
214
rc = gpgme_get_engine_info(&engine_info);
215
if(rc != GPG_ERR_NO_ERROR){
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
216
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
217
207
gpgme_strsource(rc), gpgme_strerror(rc));
218
208
return false;
231
221
}
232
222
233
223
/* Create new GPGME "context" */
234
rc = gpgme_new(&(mc.ctx));
235
if(rc != GPG_ERR_NO_ERROR){
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
236
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
237
227
gpgme_strsource(rc), gpgme_strerror(rc));
238
228
return false;
239
229
}
240
230
241
if(not import_key(pubkey) or not import_key(seckey)){
231
if (not import_key(pubkey) or not import_key(seckey)){
242
232
return false;
243
233
}
244
234
249
239
* Decrypt OpenPGP data.
250
240
* Returns -1 on error
251
241
*/
252
static ssize_t pgp_packet_decrypt(const char *cryptotext,
253
size_t crypto_size,
254
char **plaintext){
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
255
246
gpgme_data_t dh_crypto, dh_plain;
256
247
gpgme_error_t rc;
257
248
ssize_t ret;
258
249
size_t plaintext_capacity = 0;
259
250
ssize_t plaintext_length = 0;
260
251
261
if(debug){
252
if (debug){
262
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
263
254
}
264
255
265
256
/* Create new GPGME data buffer from memory cryptotext */
266
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
267
258
0);
268
if(rc != GPG_ERR_NO_ERROR){
259
if (rc != GPG_ERR_NO_ERROR){
269
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
270
261
gpgme_strsource(rc), gpgme_strerror(rc));
271
262
return -1;
273
264
274
265
/* Create new empty GPGME data buffer for the plaintext */
275
266
rc = gpgme_data_new(&dh_plain);
276
if(rc != GPG_ERR_NO_ERROR){
267
if (rc != GPG_ERR_NO_ERROR){
277
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
278
269
gpgme_strsource(rc), gpgme_strerror(rc));
279
270
gpgme_data_release(dh_crypto);
282
273
283
274
/* Decrypt data from the cryptotext data buffer to the plaintext
284
275
data buffer */
285
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
286
if(rc != GPG_ERR_NO_ERROR){
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
287
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
288
279
gpgme_strsource(rc), gpgme_strerror(rc));
289
280
plaintext_length = -1;
290
if(debug){
281
if (debug){
291
282
gpgme_decrypt_result_t result;
292
result = gpgme_op_decrypt_result(mc.ctx);
293
if(result == NULL){
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
294
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
295
286
} else {
296
287
fprintf(stderr, "Unsupported algorithm: %s\n",
323
314
}
324
315
325
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
326
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
327
318
perror("gpgme_data_seek");
328
319
plaintext_length = -1;
329
320
goto decrypt_end;
331
322
332
323
*plaintext = NULL;
333
324
while(true){
334
plaintext_capacity = incbuffer(plaintext,
325
plaintext_capacity = adjustbuffer(plaintext,
335
326
(size_t)plaintext_length,
336
327
plaintext_capacity);
337
if(plaintext_capacity == 0){
338
perror("incbuffer");
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
339
330
plaintext_length = -1;
340
331
goto decrypt_end;
341
332
}
343
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
344
335
BUFFER_SIZE);
345
336
/* Print the data, if any */
346
if(ret == 0){
337
if (ret == 0){
347
338
/* EOF */
348
339
break;
349
340
}
373
364
return plaintext_length;
374
365
}
375
366
376
static const char * safer_gnutls_strerror(int value){
377
const char *ret = gnutls_strerror(value); /* Spurious warning from
378
-Wunreachable-code */
379
if(ret == NULL)
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
380
370
ret = "(unknown)";
381
371
return ret;
382
372
}
387
377
fprintf(stderr, "GnuTLS: %s", string);
388
378
}
389
379
390
static int init_gnutls_global(const char *pubkeyfilename,
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
391
382
const char *seckeyfilename){
392
383
int ret;
393
384
396
387
}
397
388
398
389
ret = gnutls_global_init();
399
if(ret != GNUTLS_E_SUCCESS){
400
fprintf(stderr, "GnuTLS global_init: %s\n",
401
safer_gnutls_strerror(ret));
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
402
393
return -1;
403
394
}
404
395
405
if(debug){
396
if (debug){
406
397
/* "Use a log level over 10 to enable all debugging options."
407
398
* - GnuTLS manual
408
399
*/
411
402
}
412
403
413
404
/* OpenPGP credentials */
414
gnutls_certificate_allocate_credentials(&mc.cred);
415
if(ret != GNUTLS_E_SUCCESS){
416
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
417
from
418
-Wunreachable-code
419
*/
420
safer_gnutls_strerror(ret));
421
gnutls_global_deinit();
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
422
411
return -1;
423
412
}
424
413
429
418
}
430
419
431
420
ret = gnutls_certificate_set_openpgp_key_file
432
(mc.cred, pubkeyfilename, seckeyfilename,
421
(mc->cred, pubkeyfilename, seckeyfilename,
433
422
GNUTLS_OPENPGP_FMT_BASE64);
434
if(ret != GNUTLS_E_SUCCESS){
423
if (ret != GNUTLS_E_SUCCESS) {
435
424
fprintf(stderr,
436
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
437
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
441
430
}
442
431
443
432
/* GnuTLS server initialization */
444
ret = gnutls_dh_params_init(&mc.dh_params);
445
if(ret != GNUTLS_E_SUCCESS){
446
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
447
" %s\n", safer_gnutls_strerror(ret));
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if (ret != GNUTLS_E_SUCCESS) {
435
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
448
437
goto globalfail;
449
438
}
450
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
451
if(ret != GNUTLS_E_SUCCESS){
452
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
453
safer_gnutls_strerror(ret));
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if (ret != GNUTLS_E_SUCCESS) {
441
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
454
443
goto globalfail;
455
444
}
456
445
457
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
458
447
459
448
return 0;
460
449
461
450
globalfail:
462
451
463
gnutls_certificate_free_credentials(mc.cred);
452
gnutls_certificate_free_credentials(mc->cred);
464
453
gnutls_global_deinit();
465
gnutls_dh_params_deinit(mc.dh_params);
454
gnutls_dh_params_deinit(mc->dh_params);
466
455
return -1;
467
456
}
468
457
469
static int init_gnutls_session(gnutls_session_t *session){
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
470
460
int ret;
471
461
/* GnuTLS session creation */
472
462
ret = gnutls_init(session, GNUTLS_SERVER);
473
if(ret != GNUTLS_E_SUCCESS){
463
if (ret != GNUTLS_E_SUCCESS){
474
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
475
465
safer_gnutls_strerror(ret));
476
466
}
477
467
478
468
{
479
469
const char *err;
480
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
481
if(ret != GNUTLS_E_SUCCESS){
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
482
472
fprintf(stderr, "Syntax error at: %s\n", err);
483
473
fprintf(stderr, "GnuTLS error: %s\n",
484
474
safer_gnutls_strerror(ret));
485
gnutls_deinit(*session);
475
gnutls_deinit (*session);
486
476
return -1;
487
477
}
488
478
}
489
479
490
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
491
mc.cred);
492
if(ret != GNUTLS_E_SUCCESS){
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
493
483
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
494
484
safer_gnutls_strerror(ret));
495
gnutls_deinit(*session);
485
gnutls_deinit (*session);
496
486
return -1;
497
487
}
498
488
499
489
/* ignore client certificate if any. */
500
gnutls_certificate_server_set_request(*session,
501
GNUTLS_CERT_IGNORE);
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
502
492
503
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
504
494
505
495
return 0;
506
496
}
512
502
/* Called when a Mandos server is found */
513
503
static int start_mandos_communication(const char *ip, uint16_t port,
514
504
AvahiIfIndex if_index,
515
int af){
505
mandos_context *mc){
516
506
int ret, tcp_sd;
517
ssize_t sret;
518
union {
519
struct sockaddr_in in;
520
struct sockaddr_in6 in6;
521
} to;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
522
508
char *buffer = NULL;
523
509
char *decrypted_buffer;
524
510
size_t buffer_length = 0;
526
512
ssize_t decrypted_buffer_size;
527
513
size_t written;
528
514
int retval = 0;
515
char interface[IF_NAMESIZE];
529
516
gnutls_session_t session;
530
int pf; /* Protocol family */
531
532
switch(af){
533
case AF_INET6:
534
pf = PF_INET6;
535
break;
536
case AF_INET:
537
pf = PF_INET;
538
break;
539
default:
540
fprintf(stderr, "Bad address family: %d\n", af);
541
return -1;
542
}
543
544
ret = init_gnutls_session(&session);
545
if(ret != 0){
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
546
520
return -1;
547
521
}
548
522
549
523
if(debug){
550
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
551
525
"\n", ip, port);
552
526
}
553
527
554
tcp_sd = socket(pf, SOCK_STREAM, 0);
555
if(tcp_sd < 0){
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
556
530
perror("socket");
557
531
return -1;
558
532
}
559
533
534
if(debug){
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
perror("if_indextoname");
537
return -1;
538
}
539
fprintf(stderr, "Binding to interface %s\n", interface);
540
}
541
560
542
memset(&to, 0, sizeof(to));
561
if(af == AF_INET6){
562
to.in6.sin6_family = (uint16_t)af;
563
ret = inet_pton(af, ip, &to.in6.sin6_addr);
564
} else { /* IPv4 */
565
to.in.sin_family = (sa_family_t)af;
566
ret = inet_pton(af, ip, &to.in.sin_addr);
567
}
568
if(ret < 0 ){
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
547
if (ret < 0 ){
569
548
perror("inet_pton");
570
549
return -1;
571
550
}
573
552
fprintf(stderr, "Bad address: %s\n", ip);
574
553
return -1;
575
554
}
576
if(af == AF_INET6){
577
to.in6.sin6_port = htons(port); /* Spurious warnings from
578
-Wconversion and
579
-Wunreachable-code */
580
581
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
582
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
583
-Wunreachable-code*/
584
if(if_index == AVAHI_IF_UNSPEC){
585
fprintf(stderr, "An IPv6 link-local address is incomplete"
586
" without a network interface\n");
587
return -1;
588
}
589
/* Set the network interface number as scope */
590
to.in6.sin6_scope_id = (uint32_t)if_index;
591
}
592
} else {
593
to.in.sin_port = htons(port); /* Spurious warnings from
594
-Wconversion and
595
-Wunreachable-code */
596
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
597
558
598
559
if(debug){
599
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
600
char interface[IF_NAMESIZE];
601
if(if_indextoname((unsigned int)if_index, interface) == NULL){
602
perror("if_indextoname");
603
} else {
604
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
605
ip, interface, port);
606
}
607
} else {
608
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
609
port);
610
}
611
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
612
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
613
const char *pcret;
614
if(af == AF_INET6){
615
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
616
sizeof(addrstr));
617
} else {
618
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
619
sizeof(addrstr));
620
}
621
if(pcret == NULL){
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
622
565
perror("inet_ntop");
623
566
} else {
624
567
if(strcmp(addrstr, ip) != 0){
627
570
}
628
571
}
629
572
630
if(af == AF_INET6){
631
ret = connect(tcp_sd, &to.in6, sizeof(to));
632
} else {
633
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
634
}
635
if(ret < 0){
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
636
575
perror("connect");
637
576
return -1;
638
577
}
639
578
640
579
const char *out = mandos_protocol_version;
641
580
written = 0;
642
while(true){
581
while (true){
643
582
size_t out_size = strlen(out);
644
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
645
584
out_size - written));
646
if(ret == -1){
585
if (ret == -1){
647
586
perror("write");
648
587
retval = -1;
649
588
goto mandos_end;
652
591
if(written < out_size){
653
592
continue;
654
593
} else {
655
if(out == mandos_protocol_version){
594
if (out == mandos_protocol_version){
656
595
written = 0;
657
596
out = "\r\n";
658
597
} else {
665
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
666
605
}
667
606
668
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
669
608
670
609
do{
671
ret = gnutls_handshake(session);
610
ret = gnutls_handshake (session);
672
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
673
612
674
if(ret != GNUTLS_E_SUCCESS){
613
if (ret != GNUTLS_E_SUCCESS){
675
614
if(debug){
676
615
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
677
gnutls_perror(ret);
616
gnutls_perror (ret);
678
617
}
679
618
retval = -1;
680
619
goto mandos_end;
683
622
/* Read OpenPGP packet that contains the wanted password */
684
623
685
624
if(debug){
686
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
687
626
ip);
688
627
}
689
628
690
629
while(true){
691
buffer_capacity = incbuffer(&buffer, buffer_length,
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
692
631
buffer_capacity);
693
if(buffer_capacity == 0){
694
perror("incbuffer");
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
695
634
retval = -1;
696
635
goto mandos_end;
697
636
}
698
637
699
sret = gnutls_record_recv(session, buffer+buffer_length,
700
BUFFER_SIZE);
701
if(sret == 0){
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
702
641
break;
703
642
}
704
if(sret < 0){
705
switch(sret){
643
if (ret < 0){
644
switch(ret){
706
645
case GNUTLS_E_INTERRUPTED:
707
646
case GNUTLS_E_AGAIN:
708
647
break;
709
648
case GNUTLS_E_REHANDSHAKE:
710
649
do{
711
ret = gnutls_handshake(session);
650
ret = gnutls_handshake (session);
712
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
713
if(ret < 0){
652
if (ret < 0){
714
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
715
gnutls_perror(ret);
654
gnutls_perror (ret);
716
655
retval = -1;
717
656
goto mandos_end;
718
657
}
721
660
fprintf(stderr, "Unknown error while reading data from"
722
661
" encrypted session with Mandos server\n");
723
662
retval = -1;
724
gnutls_bye(session, GNUTLS_SHUT_RDWR);
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
725
664
goto mandos_end;
726
665
}
727
666
} else {
728
buffer_length += (size_t) sret;
667
buffer_length += (size_t) ret;
729
668
}
730
669
}
731
670
733
672
fprintf(stderr, "Closing TLS session\n");
734
673
}
735
674
736
gnutls_bye(session, GNUTLS_SHUT_RDWR);
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
737
676
738
if(buffer_length > 0){
739
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
740
679
buffer_length,
741
680
&decrypted_buffer);
742
if(decrypted_buffer_size >= 0){
681
if (decrypted_buffer_size >= 0){
743
682
written = 0;
744
683
while(written < (size_t) decrypted_buffer_size){
745
ret = (int)fwrite(decrypted_buffer + written, 1,
746
(size_t)decrypted_buffer_size - written,
747
stdout);
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
748
687
if(ret == 0 and ferror(stdout)){
749
688
if(debug){
750
689
fprintf(stderr, "Error writing encrypted data: %s\n",
767
706
768
707
mandos_end:
769
708
free(buffer);
770
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
771
710
if(ret == -1){
772
711
perror("close");
773
712
}
774
gnutls_deinit(session);
713
gnutls_deinit (session);
775
714
return retval;
776
715
}
777
716
778
717
static void resolve_callback(AvahiSServiceResolver *r,
779
718
AvahiIfIndex interface,
780
AvahiProtocol proto,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
781
720
AvahiResolverEvent event,
782
721
const char *name,
783
722
const char *type,
788
727
AVAHI_GCC_UNUSED AvahiStringList *txt,
789
728
AVAHI_GCC_UNUSED AvahiLookupResultFlags
790
729
flags,
791
__attribute__((unused)) void* userdata){
730
void* userdata) {
731
mandos_context *mc = userdata;
792
732
assert(r);
793
733
794
734
/* Called whenever a service has been resolved successfully or
795
735
timed out */
796
736
797
switch(event){
737
switch (event) {
798
738
default:
799
739
case AVAHI_RESOLVER_FAILURE:
800
740
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
801
741
" of type '%s' in domain '%s': %s\n", name, type, domain,
802
avahi_strerror(avahi_server_errno(mc.server)));
742
avahi_strerror(avahi_server_errno(mc->server)));
803
743
break;
804
744
805
745
case AVAHI_RESOLVER_FOUND:
808
748
avahi_address_snprint(ip, sizeof(ip), address);
809
749
if(debug){
810
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
811
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
812
ip, (intmax_t)interface, port);
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
813
753
}
814
int ret = start_mandos_communication(ip, port, interface,
815
avahi_proto_to_af(proto));
816
if(ret == 0){
817
avahi_simple_poll_quit(mc.simple_poll);
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
818
757
}
819
758
}
820
759
}
821
760
avahi_s_service_resolver_free(r);
822
761
}
823
762
824
static void browse_callback(AvahiSServiceBrowser *b,
825
AvahiIfIndex interface,
826
AvahiProtocol protocol,
827
AvahiBrowserEvent event,
828
const char *name,
829
const char *type,
830
const char *domain,
831
AVAHI_GCC_UNUSED AvahiLookupResultFlags
832
flags,
833
__attribute__((unused)) void* userdata){
763
static void browse_callback( AvahiSServiceBrowser *b,
764
AvahiIfIndex interface,
765
AvahiProtocol protocol,
766
AvahiBrowserEvent event,
767
const char *name,
768
const char *type,
769
const char *domain,
770
AVAHI_GCC_UNUSED AvahiLookupResultFlags
771
flags,
772
void* userdata) {
773
mandos_context *mc = userdata;
834
774
assert(b);
835
775
836
776
/* Called whenever a new services becomes available on the LAN or
837
777
is removed from the LAN */
838
778
839
switch(event){
779
switch (event) {
840
780
default:
841
781
case AVAHI_BROWSER_FAILURE:
842
782
843
783
fprintf(stderr, "(Avahi browser) %s\n",
844
avahi_strerror(avahi_server_errno(mc.server)));
845
avahi_simple_poll_quit(mc.simple_poll);
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
846
786
return;
847
787
848
788
case AVAHI_BROWSER_NEW:
851
791
the callback function is called the Avahi server will free the
852
792
resolver for us. */
853
793
854
if(!(avahi_s_service_resolver_new(mc.server, interface,
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
855
795
protocol, name, type, domain,
856
796
AVAHI_PROTO_INET6, 0,
857
resolve_callback, NULL)))
797
resolve_callback, mc)))
858
798
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
859
name, avahi_strerror(avahi_server_errno(mc.server)));
799
name, avahi_strerror(avahi_server_errno(mc->server)));
860
800
break;
861
801
862
802
case AVAHI_BROWSER_REMOVE:
871
811
}
872
812
}
873
813
874
/* stop main loop after sigterm has been called */
875
static void handle_sigterm(__attribute__((unused)) int sig){
876
int old_errno = errno;
877
avahi_simple_poll_quit(mc.simple_poll);
878
errno = old_errno;
879
}
880
881
814
int main(int argc, char *argv[]){
882
AvahiSServiceBrowser *sb = NULL;
883
int error;
884
int ret;
885
intmax_t tmpmax;
886
int numchars;
887
int exitcode = EXIT_SUCCESS;
888
const char *interface = "eth0";
889
struct ifreq network;
890
int sd;
891
uid_t uid;
892
gid_t gid;
893
char *connect_to = NULL;
894
char tempdir[] = "/tmp/mandosXXXXXX";
895
bool tempdir_created = false;
896
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
897
const char *seckey = PATHDIR "/" SECKEY;
898
const char *pubkey = PATHDIR "/" PUBKEY;
899
900
bool gnutls_initialized = false;
901
bool gpgme_initialized = false;
902
double delay = 2.5;
903
904
struct sigaction old_sigterm_action;
905
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
906
907
{
908
struct argp_option options[] = {
909
{ .name = "debug", .key = 128,
910
.doc = "Debug mode", .group = 3 },
911
{ .name = "connect", .key = 'c',
912
.arg = "ADDRESS:PORT",
913
.doc = "Connect directly to a specific Mandos server",
914
.group = 1 },
915
{ .name = "interface", .key = 'i',
916
.arg = "NAME",
917
.doc = "Network interface that will be used to search for"
918
" Mandos servers",
919
.group = 1 },
920
{ .name = "seckey", .key = 's',
921
.arg = "FILE",
922
.doc = "OpenPGP secret key file base name",
923
.group = 1 },
924
{ .name = "pubkey", .key = 'p',
925
.arg = "FILE",
926
.doc = "OpenPGP public key file base name",
927
.group = 2 },
928
{ .name = "dh-bits", .key = 129,
929
.arg = "BITS",
930
.doc = "Bit length of the prime number used in the"
931
" Diffie-Hellman key exchange",
932
.group = 2 },
933
{ .name = "priority", .key = 130,
934
.arg = "STRING",
935
.doc = "GnuTLS priority string for the TLS handshake",
936
.group = 1 },
937
{ .name = "delay", .key = 131,
938
.arg = "SECONDS",
939
.doc = "Maximum delay to wait for interface startup",
940
.group = 2 },
941
{ .name = NULL }
942
};
943
944
error_t parse_opt(int key, char *arg,
945
struct argp_state *state){
946
switch(key){
947
case 128: /* --debug */
948
debug = true;
949
break;
950
case 'c': /* --connect */
951
connect_to = arg;
952
break;
953
case 'i': /* --interface */
954
interface = arg;
955
break;
956
case 's': /* --seckey */
957
seckey = arg;
958
break;
959
case 'p': /* --pubkey */
960
pubkey = arg;
961
break;
962
case 129: /* --dh-bits */
963
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
964
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
965
or arg[numchars] != '\0'){
966
fprintf(stderr, "Bad number of DH bits\n");
967
exit(EXIT_FAILURE);
968
}
969
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
970
break;
971
case 130: /* --priority */
972
mc.priority = arg;
973
break;
974
case 131: /* --delay */
975
ret = sscanf(arg, "%lf%n", &delay, &numchars);
976
if(ret < 1 or arg[numchars] != '\0'){
977
fprintf(stderr, "Bad delay\n");
978
exit(EXIT_FAILURE);
979
}
980
break;
981
case ARGP_KEY_ARG:
982
argp_usage(state);
983
case ARGP_KEY_END:
984
break;
985
default:
986
return ARGP_ERR_UNKNOWN;
987
}
988
return 0;
989
}
990
991
struct argp argp = { .options = options, .parser = parse_opt,
992
.args_doc = "",
993
.doc = "Mandos client -- Get and decrypt"
994
" passwords from a Mandos server" };
995
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
996
if(ret == ARGP_ERR_UNKNOWN){
997
fprintf(stderr, "Unknown error while parsing arguments\n");
998
exitcode = EXIT_FAILURE;
999
goto end;
1000
}
1001
}
1002
1003
if(not debug){
1004
avahi_set_log_function(empty_log);
1005
}
1006
1007
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1008
from the signal handler */
1009
/* Initialize the pseudo-RNG for Avahi */
1010
srand((unsigned int) time(NULL));
1011
mc.simple_poll = avahi_simple_poll_new();
1012
if(mc.simple_poll == NULL){
1013
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1014
exitcode = EXIT_FAILURE;
1015
goto end;
1016
}
1017
1018
sigemptyset(&sigterm_action.sa_mask);
1019
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1020
if(ret == -1){
1021
perror("sigaddset");
1022
exitcode = EXIT_FAILURE;
1023
goto end;
1024
}
1025
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1026
if(ret == -1){
1027
perror("sigaction");
1028
exitcode = EXIT_FAILURE;
1029
goto end;
1030
}
1031
1032
1033
/* If the interface is down, bring it up */
1034
if(interface[0] != '\0'){
1035
#ifdef __linux__
1036
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1037
messages to mess up the prompt */
1038
ret = klogctl(8, NULL, 5);
1039
bool restore_loglevel = true;
1040
if(ret == -1){
1041
restore_loglevel = false;
1042
perror("klogctl");
1043
}
1044
#endif
1045
1046
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1047
if(sd < 0){
1048
perror("socket");
1049
exitcode = EXIT_FAILURE;
1050
#ifdef __linux__
1051
if(restore_loglevel){
1052
ret = klogctl(7, NULL, 0);
1053
if(ret == -1){
1054
perror("klogctl");
1055
}
1056
}
1057
#endif
1058
goto end;
1059
}
1060
strcpy(network.ifr_name, interface);
1061
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1062
if(ret == -1){
1063
perror("ioctl SIOCGIFFLAGS");
1064
#ifdef __linux__
1065
if(restore_loglevel){
1066
ret = klogctl(7, NULL, 0);
1067
if(ret == -1){
1068
perror("klogctl");
1069
}
1070
}
1071
#endif
1072
exitcode = EXIT_FAILURE;
1073
goto end;
1074
}
1075
if((network.ifr_flags & IFF_UP) == 0){
1076
network.ifr_flags |= IFF_UP;
1077
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1078
if(ret == -1){
1079
perror("ioctl SIOCSIFFLAGS");
1080
exitcode = EXIT_FAILURE;
1081
#ifdef __linux__
1082
if(restore_loglevel){
1083
ret = klogctl(7, NULL, 0);
1084
if(ret == -1){
1085
perror("klogctl");
815
AvahiSServiceBrowser *sb = NULL;
816
int error;
817
int ret;
818
int exitcode = EXIT_SUCCESS;
819
const char *interface = "eth0";
820
struct ifreq network;
821
int sd;
822
uid_t uid;
823
gid_t gid;
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
835
836
{
837
struct argp_option options[] = {
838
{ .name = "debug", .key = 128,
839
.doc = "Debug mode", .group = 3 },
840
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
843
.group = 1 },
844
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
848
.group = 1 },
849
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
852
.group = 1 },
853
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
856
.group = 2 },
857
{ .name = "dh-bits", .key = 129,
858
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
861
.group = 2 },
862
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
866
{ .name = NULL }
867
};
868
869
error_t parse_opt (int key, char *arg,
870
struct argp_state *state) {
871
/* Get the INPUT argument from `argp_parse', which we know is
872
a pointer to our plugin list pointer. */
873
switch (key) {
874
case 128: /* --debug */
875
debug = true;
876
break;
877
case 'c': /* --connect */
878
connect_to = arg;
879
break;
880
case 'i': /* --interface */
881
interface = arg;
882
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
890
errno = 0;
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
if (errno){
893
perror("strtol");
894
exit(EXIT_FAILURE);
1086
895
}
896
break;
897
case 130: /* --priority */
898
mc.priority = arg;
899
break;
900
case ARGP_KEY_ARG:
901
argp_usage (state);
902
case ARGP_KEY_END:
903
break;
904
default:
905
return ARGP_ERR_UNKNOWN;
1087
906
}
1088
#endif
907
return 0;
908
}
909
910
struct argp argp = { .options = options, .parser = parse_opt,
911
.args_doc = "",
912
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
1089
918
goto end;
1090
919
}
1091
920
}
1092
/* sleep checking until interface is running */
1093
for(int i=0; i < delay * 4; i++){
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
1094
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1095
932
if(ret == -1){
1096
933
perror("ioctl SIOCGIFFLAGS");
1097
} else if(network.ifr_flags & IFF_RUNNING){
1098
break;
1099
}
1100
struct timespec sleeptime = { .tv_nsec = 250000000 };
1101
ret = nanosleep(&sleeptime, NULL);
1102
if(ret == -1 and errno != EINTR){
1103
perror("nanosleep");
1104
}
1105
}
1106
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1107
if(ret == -1){
1108
perror("close");
1109
}
1110
#ifdef __linux__
1111
if(restore_loglevel){
1112
/* Restores kernel loglevel to default */
1113
ret = klogctl(7, NULL, 0);
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
1114
947
if(ret == -1){
1115
perror("klogctl");
948
perror("close");
1116
949
}
1117
950
}
1118
#endif
1119
}
1120
1121
uid = getuid();
1122
gid = getgid();
1123
1124
errno = 0;
1125
setgid(gid);
1126
if(ret == -1){
1127
perror("setgid");
1128
}
1129
1130
ret = setuid(uid);
1131
if(ret == -1){
1132
perror("setuid");
1133
}
1134
1135
ret = init_gnutls_global(pubkey, seckey);
1136
if(ret == -1){
1137
fprintf(stderr, "init_gnutls_global failed\n");
1138
exitcode = EXIT_FAILURE;
1139
goto end;
1140
} else {
1141
gnutls_initialized = true;
1142
}
1143
1144
if(mkdtemp(tempdir) == NULL){
1145
perror("mkdtemp");
1146
goto end;
1147
}
1148
tempdir_created = true;
1149
1150
if(not init_gpgme(pubkey, seckey, tempdir)){
1151
fprintf(stderr, "init_gpgme failed\n");
1152
exitcode = EXIT_FAILURE;
1153
goto end;
1154
} else {
1155
gpgme_initialized = true;
1156
}
1157
1158
if(interface[0] != '\0'){
951
952
uid = getuid();
953
gid = getgid();
954
955
ret = setuid(uid);
956
if (ret == -1){
957
perror("setuid");
958
}
959
960
setgid(gid);
961
if (ret == -1){
962
perror("setgid");
963
}
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
1159
988
if_index = (AvahiIfIndex) if_nametoindex(interface);
1160
989
if(if_index == 0){
1161
990
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
}
1166
1167
if(connect_to != NULL){
1168
/* Connect directly, do not use Zeroconf */
1169
/* (Mainly meant for debugging) */
1170
char *address = strrchr(connect_to, ':');
1171
if(address == NULL){
1172
fprintf(stderr, "No colon in address\n");
1173
exitcode = EXIT_FAILURE;
1174
goto end;
1175
}
1176
uint16_t port;
1177
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1178
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1179
or address[numchars+1] != '\0'){
1180
fprintf(stderr, "Bad port number\n");
1181
exitcode = EXIT_FAILURE;
1182
goto end;
1183
}
1184
port = (uint16_t)tmpmax;
1185
*address = '\0';
1186
address = connect_to;
1187
/* Colon in address indicates IPv6 */
1188
int af;
1189
if(strchr(address, ':') != NULL){
1190
af = AF_INET6;
1191
} else {
1192
af = AF_INET;
1193
}
1194
ret = start_mandos_communication(address, port, if_index,
1195
af);
1196
if(ret < 0){
1197
exitcode = EXIT_FAILURE;
1198
} else {
1199
exitcode = EXIT_SUCCESS;
1200
}
1201
goto end;
1202
}
1203
1204
{
1205
AvahiServerConfig config;
1206
/* Do not publish any local Zeroconf records */
1207
avahi_server_config_init(&config);
1208
config.publish_hinfo = 0;
1209
config.publish_addresses = 0;
1210
config.publish_workstation = 0;
1211
config.publish_domain = 0;
1212
1213
/* Allocate a new server */
1214
mc.server = avahi_server_new(avahi_simple_poll_get
1215
(mc.simple_poll), &config, NULL,
1216
NULL, &error);
1217
1218
/* Free the Avahi configuration data */
1219
avahi_server_config_free(&config);
1220
}
1221
1222
/* Check if creating the Avahi server object succeeded */
1223
if(mc.server == NULL){
1224
fprintf(stderr, "Failed to create Avahi server: %s\n",
1225
avahi_strerror(error));
1226
exitcode = EXIT_FAILURE;
1227
goto end;
1228
}
1229
1230
/* Create the Avahi service browser */
1231
sb = avahi_s_service_browser_new(mc.server, if_index,
1232
AVAHI_PROTO_INET6, "_mandos._tcp",
1233
NULL, 0, browse_callback, NULL);
1234
if(sb == NULL){
1235
fprintf(stderr, "Failed to create service browser: %s\n",
1236
avahi_strerror(avahi_server_errno(mc.server)));
1237
exitcode = EXIT_FAILURE;
1238
goto end;
1239
}
1240
1241
/* Run the main loop */
1242
1243
if(debug){
1244
fprintf(stderr, "Starting Avahi loop search\n");
1245
}
1246
1247
avahi_simple_poll_loop(mc.simple_poll);
1248
991
exit(EXIT_FAILURE);
992
}
993
994
if(connect_to != NULL){
995
/* Connect directly, do not use Zeroconf */
996
/* (Mainly meant for debugging) */
997
char *address = strrchr(connect_to, ':');
998
if(address == NULL){
999
fprintf(stderr, "No colon in address\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
errno = 0;
1004
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1005
if(errno){
1006
perror("Bad port number");
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
*address = '\0';
1011
address = connect_to;
1012
ret = start_mandos_communication(address, port, if_index, &mc);
1013
if(ret < 0){
1014
exitcode = EXIT_FAILURE;
1015
} else {
1016
exitcode = EXIT_SUCCESS;
1017
}
1018
goto end;
1019
}
1020
1021
if (not debug){
1022
avahi_set_log_function(empty_log);
1023
}
1024
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
1028
/* Allocate main Avahi loop object */
1029
mc.simple_poll = avahi_simple_poll_new();
1030
if (mc.simple_poll == NULL) {
1031
fprintf(stderr, "Avahi: Failed to create simple poll"
1032
" object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
{
1038
AvahiServerConfig config;
1039
/* Do not publish any local Zeroconf records */
1040
avahi_server_config_init(&config);
1041
config.publish_hinfo = 0;
1042
config.publish_addresses = 0;
1043
config.publish_workstation = 0;
1044
config.publish_domain = 0;
1045
1046
/* Allocate a new server */
1047
mc.server = avahi_server_new(avahi_simple_poll_get
1048
(mc.simple_poll), &config, NULL,
1049
NULL, &error);
1050
1051
/* Free the Avahi configuration data */
1052
avahi_server_config_free(&config);
1053
}
1054
1055
/* Check if creating the Avahi server object succeeded */
1056
if (mc.server == NULL) {
1057
fprintf(stderr, "Failed to create Avahi server: %s\n",
1058
avahi_strerror(error));
1059
exitcode = EXIT_FAILURE;
1060
goto end;
1061
}
1062
1063
/* Create the Avahi service browser */
1064
sb = avahi_s_service_browser_new(mc.server, if_index,
1065
AVAHI_PROTO_INET6,
1066
"_mandos._tcp", NULL, 0,
1067
browse_callback, &mc);
1068
if (sb == NULL) {
1069
fprintf(stderr, "Failed to create service browser: %s\n",
1070
avahi_strerror(avahi_server_errno(mc.server)));
1071
exitcode = EXIT_FAILURE;
1072
goto end;
1073
}
1074
1075
/* Run the main loop */
1076
1077
if (debug){
1078
fprintf(stderr, "Starting Avahi loop search\n");
1079
}
1080
1081
avahi_simple_poll_loop(mc.simple_poll);
1082
1249
1083
end:
1250
1251
if(debug){
1252
fprintf(stderr, "%s exiting\n", argv[0]);
1253
}
1254
1255
/* Cleanup things */
1256
if(sb != NULL)
1257
avahi_s_service_browser_free(sb);
1258
1259
if(mc.server != NULL)
1260
avahi_server_free(mc.server);
1261
1262
if(mc.simple_poll != NULL)
1263
avahi_simple_poll_free(mc.simple_poll);
1264
1265
if(gnutls_initialized){
1266
gnutls_certificate_free_credentials(mc.cred);
1267
gnutls_global_deinit();
1268
gnutls_dh_params_deinit(mc.dh_params);
1269
}
1270
1271
if(gpgme_initialized){
1272
gpgme_release(mc.ctx);
1273
}
1274
1275
/* Removes the temp directory used by GPGME */
1276
if(tempdir_created){
1277
DIR *d;
1278
struct dirent *direntry;
1279
d = opendir(tempdir);
1280
if(d == NULL){
1281
if(errno != ENOENT){
1084
1085
if (debug){
1086
fprintf(stderr, "%s exiting\n", argv[0]);
1087
}
1088
1089
/* Cleanup things */
1090
if (sb != NULL)
1091
avahi_s_service_browser_free(sb);
1092
1093
if (mc.server != NULL)
1094
avahi_server_free(mc.server);
1095
1096
if (mc.simple_poll != NULL)
1097
avahi_simple_poll_free(mc.simple_poll);
1098
1099
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1101
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1282
1115
perror("opendir");
1283
}
1284
} else {
1285
while(true){
1286
direntry = readdir(d);
1287
if(direntry == NULL){
1288
break;
1289
}
1290
/* Skip "." and ".." */
1291
if(direntry->d_name[0] == '.'
1292
and (direntry->d_name[1] == '\0'
1293
or (direntry->d_name[1] == '.'
1294
and direntry->d_name[2] == '\0'))){
1295
continue;
1296
}
1297
char *fullname = NULL;
1298
ret = asprintf(&fullname, "%s/%s", tempdir,
1299
direntry->d_name);
1300
if(ret < 0){
1301
perror("asprintf");
1302
continue;
1303
}
1304
ret = remove(fullname);
1305
if(ret == -1){
1306
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1307
strerror(errno));
1308
}
1309
free(fullname);
1310
}
1311
closedir(d);
1312
}
1313
ret = rmdir(tempdir);
1314
if(ret == -1 and errno != ENOENT){
1315
perror("rmdir");
1316
}
1317
}
1318
1319
return exitcode;
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
1320
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0