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- Committer: Teddy Hogeborn
- Date: 2009-02-09 19:26:19 UTC
- mto: (24.1.136 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: teddy@fukt.bsnet.se-20090209192619-7rse82x9pypq4ihk
* plugin-runner.c: Comment change.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
- files added:
- NEWS
- files removed:
- debian/mandos-client.config
- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
35
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
stdout, ferror(), sscanf(),
40
remove() */
39
41
#include <stdint.h> /* uint16_t, uint32_t */
40
42
#include <stddef.h> /* NULL, size_t, ssize_t */
41
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
44
srand() */
43
#include <stdbool.h> /* bool, true */
45
#include <stdbool.h> /* bool, false, true */
44
46
#include <string.h> /* memset(), strcmp(), strlen(),
45
47
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
47
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
50
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
51
53
#include <sys/stat.h> /* open() */
52
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
inet_pton(), connect() */
55
56
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
58
60
#include <assert.h> /* assert() */
59
61
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
62
#include <time.h> /* nanosleep(), time() */
61
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
64
SIOCSIFFLAGS, if_indextoname(),
63
65
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
65
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
70
getuid(), getgid(), setuid(),
67
71
setgid() */
68
72
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
73
#include <iso646.h> /* not, or, and */
70
74
#include <argp.h> /* struct argp_option, error_t, struct
71
75
argp_state, struct argp,
72
76
argp_parse(), ARGP_KEY_ARG,
73
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
74
85
75
86
/* Avahi */
76
87
/* All Avahi types, constants and functions
89
100
gnutls_*
90
101
init_gnutls_session(),
91
102
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
93
105
GNUTLS_OPENPGP_FMT_BASE64 */
94
106
95
107
/* GPGME */
101
113
102
114
#define BUFFER_SIZE 256
103
115
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
116
#define PATHDIR "/conf/conf.d/mandos"
109
117
#define SECKEY "seckey.txt"
110
118
#define PUBKEY "pubkey.txt"
111
119
112
120
bool debug = false;
113
121
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
122
const char *argp_program_version = "mandos-client " VERSION;
115
123
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
124
117
125
/* Used for passing in values through the Avahi callback functions */
125
133
gpgme_ctx_t ctx;
126
134
} mandos_context;
127
135
136
/* global context so signal handler can reach it*/
137
mandos_context mc;
138
128
139
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
141
* bytes. "buffer_capacity" is how much is currently allocated,
131
142
* "buffer_length" is how much is already used.
132
143
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
144
size_t incbuffer(char **buffer, size_t buffer_length,
134
145
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
146
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
147
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
148
if(buffer == NULL){
138
149
return 0;
139
150
}
140
151
buffer_capacity += BUFFER_SIZE;
145
156
/*
146
157
* Initialize GPGME.
147
158
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
159
static bool init_gpgme(const char *seckey,
149
160
const char *pubkey, const char *tempdir){
150
161
int ret;
151
162
gpgme_error_t rc;
153
164
154
165
155
166
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
167
* Helper function to insert pub and seckey to the engine keyring.
157
168
*/
158
169
bool import_key(const char *filename){
159
170
int fd;
160
171
gpgme_data_t pgp_data;
161
172
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
173
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
174
if(fd == -1){
164
175
perror("open");
165
176
return false;
166
177
}
167
178
168
179
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
180
if(rc != GPG_ERR_NO_ERROR){
170
181
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
182
gpgme_strsource(rc), gpgme_strerror(rc));
172
183
return false;
173
184
}
174
185
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
186
rc = gpgme_op_import(mc.ctx, pgp_data);
187
if(rc != GPG_ERR_NO_ERROR){
177
188
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
189
gpgme_strsource(rc), gpgme_strerror(rc));
179
190
return false;
180
191
}
181
192
182
ret = TEMP_FAILURE_RETRY(close(fd));
193
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
194
if(ret == -1){
184
195
perror("close");
185
196
}
187
198
return true;
188
199
}
189
200
190
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
201
if(debug){
202
fprintf(stderr, "Initializing GPGME\n");
192
203
}
193
204
194
205
/* Init GPGME */
195
206
gpgme_check_version(NULL);
196
207
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
208
if(rc != GPG_ERR_NO_ERROR){
198
209
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
210
gpgme_strsource(rc), gpgme_strerror(rc));
200
211
return false;
201
212
}
202
213
203
214
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
215
rc = gpgme_get_engine_info(&engine_info);
216
if(rc != GPG_ERR_NO_ERROR){
206
217
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
218
gpgme_strsource(rc), gpgme_strerror(rc));
208
219
return false;
221
232
}
222
233
223
234
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
235
rc = gpgme_new(&(mc.ctx));
236
if(rc != GPG_ERR_NO_ERROR){
226
237
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
238
gpgme_strsource(rc), gpgme_strerror(rc));
228
239
return false;
229
240
}
230
241
231
if (not import_key(pubkey) or not import_key(seckey)){
242
if(not import_key(pubkey) or not import_key(seckey)){
232
243
return false;
233
244
}
234
245
239
250
* Decrypt OpenPGP data.
240
251
* Returns -1 on error
241
252
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
253
static ssize_t pgp_packet_decrypt(const char *cryptotext,
254
size_t crypto_size,
255
char **plaintext){
246
256
gpgme_data_t dh_crypto, dh_plain;
247
257
gpgme_error_t rc;
248
258
ssize_t ret;
249
259
size_t plaintext_capacity = 0;
250
260
ssize_t plaintext_length = 0;
251
261
252
if (debug){
262
if(debug){
253
263
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
264
}
255
265
256
266
/* Create new GPGME data buffer from memory cryptotext */
257
267
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
268
0);
259
if (rc != GPG_ERR_NO_ERROR){
269
if(rc != GPG_ERR_NO_ERROR){
260
270
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
271
gpgme_strsource(rc), gpgme_strerror(rc));
262
272
return -1;
264
274
265
275
/* Create new empty GPGME data buffer for the plaintext */
266
276
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
277
if(rc != GPG_ERR_NO_ERROR){
268
278
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
279
gpgme_strsource(rc), gpgme_strerror(rc));
270
280
gpgme_data_release(dh_crypto);
273
283
274
284
/* Decrypt data from the cryptotext data buffer to the plaintext
275
285
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
286
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
287
if(rc != GPG_ERR_NO_ERROR){
278
288
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
289
gpgme_strsource(rc), gpgme_strerror(rc));
280
290
plaintext_length = -1;
281
if (debug){
291
if(debug){
282
292
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
293
result = gpgme_op_decrypt_result(mc.ctx);
294
if(result == NULL){
285
295
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
296
} else {
287
297
fprintf(stderr, "Unsupported algorithm: %s\n",
314
324
}
315
325
316
326
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
327
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
328
perror("gpgme_data_seek");
319
329
plaintext_length = -1;
320
330
goto decrypt_end;
322
332
323
333
*plaintext = NULL;
324
334
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
335
plaintext_capacity = incbuffer(plaintext,
326
336
(size_t)plaintext_length,
327
337
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
338
if(plaintext_capacity == 0){
339
perror("incbuffer");
330
340
plaintext_length = -1;
331
341
goto decrypt_end;
332
342
}
334
344
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
345
BUFFER_SIZE);
336
346
/* Print the data, if any */
337
if (ret == 0){
347
if(ret == 0){
338
348
/* EOF */
339
349
break;
340
350
}
364
374
return plaintext_length;
365
375
}
366
376
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
377
static const char * safer_gnutls_strerror(int value){
378
const char *ret = gnutls_strerror(value); /* Spurious warning from
379
-Wunreachable-code */
380
if(ret == NULL)
370
381
ret = "(unknown)";
371
382
return ret;
372
383
}
377
388
fprintf(stderr, "GnuTLS: %s", string);
378
389
}
379
390
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
391
static int init_gnutls_global(const char *pubkeyfilename,
382
392
const char *seckeyfilename){
383
393
int ret;
384
394
387
397
}
388
398
389
399
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
400
if(ret != GNUTLS_E_SUCCESS){
401
fprintf(stderr, "GnuTLS global_init: %s\n",
402
safer_gnutls_strerror(ret));
393
403
return -1;
394
404
}
395
405
396
if (debug){
406
if(debug){
397
407
/* "Use a log level over 10 to enable all debugging options."
398
408
* - GnuTLS manual
399
409
*/
402
412
}
403
413
404
414
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
415
gnutls_certificate_allocate_credentials(&mc.cred);
416
if(ret != GNUTLS_E_SUCCESS){
417
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
418
from
419
-Wunreachable-code
420
*/
421
safer_gnutls_strerror(ret));
422
gnutls_global_deinit();
411
423
return -1;
412
424
}
413
425
418
430
}
419
431
420
432
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
433
(mc.cred, pubkeyfilename, seckeyfilename,
422
434
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
435
if(ret != GNUTLS_E_SUCCESS){
424
436
fprintf(stderr,
425
437
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
438
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
442
}
431
443
432
444
/* GnuTLS server initialization */
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));
445
ret = gnutls_dh_params_init(&mc.dh_params);
446
if(ret != GNUTLS_E_SUCCESS){
447
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
448
" %s\n", safer_gnutls_strerror(ret));
437
449
goto globalfail;
438
450
}
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));
451
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
452
if(ret != GNUTLS_E_SUCCESS){
453
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
454
safer_gnutls_strerror(ret));
443
455
goto globalfail;
444
456
}
445
457
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
458
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
447
459
448
460
return 0;
449
461
450
462
globalfail:
451
463
452
gnutls_certificate_free_credentials(mc->cred);
464
gnutls_certificate_free_credentials(mc.cred);
453
465
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
466
gnutls_dh_params_deinit(mc.dh_params);
455
467
return -1;
456
468
}
457
469
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
470
static int init_gnutls_session(gnutls_session_t *session){
460
471
int ret;
461
472
/* GnuTLS session creation */
462
473
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
474
if(ret != GNUTLS_E_SUCCESS){
464
475
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
476
safer_gnutls_strerror(ret));
466
477
}
467
478
468
479
{
469
480
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
482
if(ret != GNUTLS_E_SUCCESS){
472
483
fprintf(stderr, "Syntax error at: %s\n", err);
473
484
fprintf(stderr, "GnuTLS error: %s\n",
474
485
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
486
gnutls_deinit(*session);
476
487
return -1;
477
488
}
478
489
}
479
490
480
491
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
492
mc.cred);
493
if(ret != GNUTLS_E_SUCCESS){
483
494
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
495
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
496
gnutls_deinit(*session);
486
497
return -1;
487
498
}
488
499
489
500
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
492
503
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
494
505
495
506
return 0;
496
507
}
502
513
/* Called when a Mandos server is found */
503
514
static int start_mandos_communication(const char *ip, uint16_t port,
504
515
AvahiIfIndex if_index,
505
mandos_context *mc){
516
int af){
506
517
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
518
ssize_t sret;
519
union {
520
struct sockaddr_in in;
521
struct sockaddr_in6 in6;
522
} to;
508
523
char *buffer = NULL;
509
524
char *decrypted_buffer;
510
525
size_t buffer_length = 0;
512
527
ssize_t decrypted_buffer_size;
513
528
size_t written;
514
529
int retval = 0;
515
char interface[IF_NAMESIZE];
516
530
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
531
int pf; /* Protocol family */
532
533
switch(af){
534
case AF_INET6:
535
pf = PF_INET6;
536
break;
537
case AF_INET:
538
pf = PF_INET;
539
break;
540
default:
541
fprintf(stderr, "Bad address family: %d\n", af);
542
return -1;
543
}
544
545
ret = init_gnutls_session(&session);
546
if(ret != 0){
520
547
return -1;
521
548
}
522
549
523
550
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
551
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
525
552
"\n", ip, port);
526
553
}
527
554
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
556
if(tcp_sd < 0){
530
557
perror("socket");
531
558
return -1;
532
559
}
533
560
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
542
561
memset(&to, 0, sizeof(to));
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 ){
562
if(af == AF_INET6){
563
to.in6.sin6_family = (uint16_t)af;
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
565
} else { /* IPv4 */
566
to.in.sin_family = (sa_family_t)af;
567
ret = inet_pton(af, ip, &to.in.sin_addr);
568
}
569
if(ret < 0 ){
548
570
perror("inet_pton");
549
571
return -1;
550
572
}
552
574
fprintf(stderr, "Bad address: %s\n", ip);
553
575
return -1;
554
576
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
577
if(af == AF_INET6){
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
579
-Wconversion and
580
-Wunreachable-code */
581
582
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
583
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
584
-Wunreachable-code*/
585
if(if_index == AVAHI_IF_UNSPEC){
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
587
" without a network interface\n");
588
return -1;
589
}
590
/* Set the network interface number as scope */
591
to.in6.sin6_scope_id = (uint32_t)if_index;
592
}
593
} else {
594
to.in.sin_port = htons(port); /* Spurious warnings from
595
-Wconversion and
596
-Wunreachable-code */
597
}
558
598
559
599
if(debug){
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){
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
601
char interface[IF_NAMESIZE];
602
if(if_indextoname((unsigned int)if_index, interface) == NULL){
603
perror("if_indextoname");
604
} else {
605
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
606
ip, interface, port);
607
}
608
} else {
609
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
610
port);
611
}
612
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
613
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
614
const char *pcret;
615
if(af == AF_INET6){
616
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
617
sizeof(addrstr));
618
} else {
619
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
620
sizeof(addrstr));
621
}
622
if(pcret == NULL){
565
623
perror("inet_ntop");
566
624
} else {
567
625
if(strcmp(addrstr, ip) != 0){
570
628
}
571
629
}
572
630
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
631
if(af == AF_INET6){
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
633
} else {
634
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
635
}
636
if(ret < 0){
575
637
perror("connect");
576
638
return -1;
577
639
}
578
640
579
641
const char *out = mandos_protocol_version;
580
642
written = 0;
581
while (true){
643
while(true){
582
644
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
645
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
646
out_size - written));
585
if (ret == -1){
647
if(ret == -1){
586
648
perror("write");
587
649
retval = -1;
588
650
goto mandos_end;
591
653
if(written < out_size){
592
654
continue;
593
655
} else {
594
if (out == mandos_protocol_version){
656
if(out == mandos_protocol_version){
595
657
written = 0;
596
658
out = "\r\n";
597
659
} else {
604
666
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
667
}
606
668
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
608
670
609
671
do{
610
ret = gnutls_handshake (session);
672
ret = gnutls_handshake(session);
611
673
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
612
674
613
if (ret != GNUTLS_E_SUCCESS){
675
if(ret != GNUTLS_E_SUCCESS){
614
676
if(debug){
615
677
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
678
gnutls_perror(ret);
617
679
}
618
680
retval = -1;
619
681
goto mandos_end;
622
684
/* Read OpenPGP packet that contains the wanted password */
623
685
624
686
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
687
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
626
688
ip);
627
689
}
628
690
629
691
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
692
buffer_capacity = incbuffer(&buffer, buffer_length,
631
693
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
694
if(buffer_capacity == 0){
695
perror("incbuffer");
634
696
retval = -1;
635
697
goto mandos_end;
636
698
}
637
699
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
700
sret = gnutls_record_recv(session, buffer+buffer_length,
701
BUFFER_SIZE);
702
if(sret == 0){
641
703
break;
642
704
}
643
if (ret < 0){
644
switch(ret){
705
if(sret < 0){
706
switch(sret){
645
707
case GNUTLS_E_INTERRUPTED:
646
708
case GNUTLS_E_AGAIN:
647
709
break;
648
710
case GNUTLS_E_REHANDSHAKE:
649
711
do{
650
ret = gnutls_handshake (session);
712
ret = gnutls_handshake(session);
651
713
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
652
if (ret < 0){
714
if(ret < 0){
653
715
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
gnutls_perror (ret);
716
gnutls_perror(ret);
655
717
retval = -1;
656
718
goto mandos_end;
657
719
}
660
722
fprintf(stderr, "Unknown error while reading data from"
661
723
" encrypted session with Mandos server\n");
662
724
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
664
726
goto mandos_end;
665
727
}
666
728
} else {
667
buffer_length += (size_t) ret;
729
buffer_length += (size_t) sret;
668
730
}
669
731
}
670
732
672
734
fprintf(stderr, "Closing TLS session\n");
673
735
}
674
736
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
676
738
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
739
if(buffer_length > 0){
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
741
buffer_length,
680
742
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
743
if(decrypted_buffer_size >= 0){
682
744
written = 0;
683
745
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
746
ret = (int)fwrite(decrypted_buffer + written, 1,
747
(size_t)decrypted_buffer_size - written,
748
stdout);
687
749
if(ret == 0 and ferror(stdout)){
688
750
if(debug){
689
751
fprintf(stderr, "Error writing encrypted data: %s\n",
706
768
707
769
mandos_end:
708
770
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
710
772
if(ret == -1){
711
773
perror("close");
712
774
}
713
gnutls_deinit (session);
775
gnutls_deinit(session);
714
776
return retval;
715
777
}
716
778
717
779
static void resolve_callback(AvahiSServiceResolver *r,
718
780
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
781
AvahiProtocol proto,
720
782
AvahiResolverEvent event,
721
783
const char *name,
722
784
const char *type,
727
789
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
790
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
791
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
792
AVAHI_GCC_UNUSED void* userdata){
732
793
assert(r);
733
794
734
795
/* Called whenever a service has been resolved successfully or
735
796
timed out */
736
797
737
switch (event) {
798
switch(event){
738
799
default:
739
800
case AVAHI_RESOLVER_FAILURE:
740
801
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
802
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
803
avahi_strerror(avahi_server_errno(mc.server)));
743
804
break;
744
805
745
806
case AVAHI_RESOLVER_FOUND:
748
809
avahi_address_snprint(ip, sizeof(ip), address);
749
810
if(debug){
750
811
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
812
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
813
ip, (intmax_t)interface, port);
753
814
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
815
int ret = start_mandos_communication(ip, port, interface,
816
avahi_proto_to_af(proto));
817
if(ret == 0){
818
avahi_simple_poll_quit(mc.simple_poll);
757
819
}
758
820
}
759
821
}
760
822
avahi_s_service_resolver_free(r);
761
823
}
762
824
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;
825
static void browse_callback(AvahiSServiceBrowser *b,
826
AvahiIfIndex interface,
827
AvahiProtocol protocol,
828
AvahiBrowserEvent event,
829
const char *name,
830
const char *type,
831
const char *domain,
832
AVAHI_GCC_UNUSED AvahiLookupResultFlags
833
flags,
834
AVAHI_GCC_UNUSED void* userdata){
774
835
assert(b);
775
836
776
837
/* Called whenever a new services becomes available on the LAN or
777
838
is removed from the LAN */
778
839
779
switch (event) {
840
switch(event){
780
841
default:
781
842
case AVAHI_BROWSER_FAILURE:
782
843
783
844
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
845
avahi_strerror(avahi_server_errno(mc.server)));
846
avahi_simple_poll_quit(mc.simple_poll);
786
847
return;
787
848
788
849
case AVAHI_BROWSER_NEW:
791
852
the callback function is called the Avahi server will free the
792
853
resolver for us. */
793
854
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
855
if(!(avahi_s_service_resolver_new(mc.server, interface,
795
856
protocol, name, type, domain,
796
857
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
858
resolve_callback, NULL)))
798
859
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
860
name, avahi_strerror(avahi_server_errno(mc.server)));
800
861
break;
801
862
802
863
case AVAHI_BROWSER_REMOVE:
811
872
}
812
873
}
813
874
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
878
if(quit_now){
879
return;
880
}
881
quit_now = 1;
882
int old_errno = errno;
883
if(mc.simple_poll != NULL){
884
avahi_simple_poll_quit(mc.simple_poll);
885
}
886
errno = old_errno;
887
}
888
814
889
int main(int argc, char *argv[]){
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);
890
AvahiSServiceBrowser *sb = NULL;
891
int error;
892
int ret;
893
intmax_t tmpmax;
894
int numchars;
895
int exitcode = EXIT_SUCCESS;
896
const char *interface = "eth0";
897
struct ifreq network;
898
int sd;
899
uid_t uid;
900
gid_t gid;
901
char *connect_to = NULL;
902
char tempdir[] = "/tmp/mandosXXXXXX";
903
bool tempdir_created = false;
904
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
905
const char *seckey = PATHDIR "/" SECKEY;
906
const char *pubkey = PATHDIR "/" PUBKEY;
907
908
/* Initialize Mandos context */
909
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
910
.dh_bits = 1024, .priority = "SECURE256"
911
":!CTYPE-X.509:+CTYPE-OPENPGP" };
912
bool gnutls_initialized = false;
913
bool gpgme_initialized = false;
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
918
919
{
920
struct argp_option options[] = {
921
{ .name = "debug", .key = 128,
922
.doc = "Debug mode", .group = 3 },
923
{ .name = "connect", .key = 'c',
924
.arg = "ADDRESS:PORT",
925
.doc = "Connect directly to a specific Mandos server",
926
.group = 1 },
927
{ .name = "interface", .key = 'i',
928
.arg = "NAME",
929
.doc = "Network interface that will be used to search for"
930
" Mandos servers",
931
.group = 1 },
932
{ .name = "seckey", .key = 's',
933
.arg = "FILE",
934
.doc = "OpenPGP secret key file base name",
935
.group = 1 },
936
{ .name = "pubkey", .key = 'p',
937
.arg = "FILE",
938
.doc = "OpenPGP public key file base name",
939
.group = 2 },
940
{ .name = "dh-bits", .key = 129,
941
.arg = "BITS",
942
.doc = "Bit length of the prime number used in the"
943
" Diffie-Hellman key exchange",
944
.group = 2 },
945
{ .name = "priority", .key = 130,
946
.arg = "STRING",
947
.doc = "GnuTLS priority string for the TLS handshake",
948
.group = 1 },
949
{ .name = "delay", .key = 131,
950
.arg = "SECONDS",
951
.doc = "Maximum delay to wait for interface startup",
952
.group = 2 },
953
{ .name = NULL }
954
};
955
956
error_t parse_opt(int key, char *arg,
957
struct argp_state *state){
958
switch(key){
959
case 128: /* --debug */
960
debug = true;
961
break;
962
case 'c': /* --connect */
963
connect_to = arg;
964
break;
965
case 'i': /* --interface */
966
interface = arg;
967
break;
968
case 's': /* --seckey */
969
seckey = arg;
970
break;
971
case 'p': /* --pubkey */
972
pubkey = arg;
973
break;
974
case 129: /* --dh-bits */
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
978
fprintf(stderr, "Bad number of DH bits\n");
979
exit(EXIT_FAILURE);
980
}
981
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
982
break;
983
case 130: /* --priority */
984
mc.priority = arg;
985
break;
986
case 131: /* --delay */
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
991
}
992
break;
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
996
break;
997
default:
998
return ARGP_ERR_UNKNOWN;
999
}
1000
return 0;
1001
}
1002
1003
struct argp argp = { .options = options, .parser = parse_opt,
1004
.args_doc = "",
1005
.doc = "Mandos client -- Get and decrypt"
1006
" passwords from a Mandos server" };
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
}
1014
1015
/* If the interface is down, bring it up */
1016
if(interface[0] != '\0'){
1017
#ifdef __linux__
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1019
messages to mess up the prompt */
1020
ret = klogctl(8, NULL, 5);
1021
bool restore_loglevel = true;
1022
if(ret == -1){
1023
restore_loglevel = false;
1024
perror("klogctl");
1025
}
1026
#endif /* __linux__ */
1027
1028
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1029
if(sd < 0){
1030
perror("socket");
1031
exitcode = EXIT_FAILURE;
1032
#ifdef __linux__
1033
if(restore_loglevel){
1034
ret = klogctl(7, NULL, 0);
1035
if(ret == -1){
1036
perror("klogctl");
1037
}
1038
}
1039
#endif /* __linux__ */
1040
goto end;
1041
}
1042
strcpy(network.ifr_name, interface);
1043
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1044
if(ret == -1){
1045
perror("ioctl SIOCGIFFLAGS");
1046
#ifdef __linux__
1047
if(restore_loglevel){
1048
ret = klogctl(7, NULL, 0);
1049
if(ret == -1){
1050
perror("klogctl");
1051
}
1052
}
1053
#endif /* __linux__ */
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
if((network.ifr_flags & IFF_UP) == 0){
1058
network.ifr_flags |= IFF_UP;
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1060
if(ret == -1){
1061
perror("ioctl SIOCSIFFLAGS");
1062
exitcode = EXIT_FAILURE;
1063
#ifdef __linux__
1064
if(restore_loglevel){
1065
ret = klogctl(7, NULL, 0);
1066
if(ret == -1){
1067
perror("klogctl");
895
1068
}
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;
906
1069
}
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;
1070
#endif /* __linux__ */
918
1071
goto end;
919
1072
}
920
1073
}
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);
1074
/* sleep checking until interface is running */
1075
for(int i=0; i < delay * 4; i++){
931
1076
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
1077
if(ret == -1){
933
1078
perror("ioctl SIOCGIFFLAGS");
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));
1079
} else if(network.ifr_flags & IFF_RUNNING){
1080
break;
1081
}
1082
struct timespec sleeptime = { .tv_nsec = 250000000 };
1083
ret = nanosleep(&sleeptime, NULL);
1084
if(ret == -1 and errno != EINTR){
1085
perror("nanosleep");
1086
}
1087
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1091
}
1092
#ifdef __linux__
1093
if(restore_loglevel){
1094
/* Restores kernel loglevel to default */
1095
ret = klogctl(7, NULL, 0);
947
1096
if(ret == -1){
948
perror("close");
1097
perror("klogctl");
949
1098
}
950
1099
}
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
1100
#endif /* __linux__ */
1101
}
1102
1103
uid = getuid();
1104
gid = getgid();
1105
1106
errno = 0;
1107
setgid(gid);
1108
if(ret == -1){
1109
perror("setgid");
1110
}
1111
1112
ret = setuid(uid);
1113
if(ret == -1){
1114
perror("setuid");
1115
}
1116
1117
ret = init_gnutls_global(pubkey, seckey);
1118
if(ret == -1){
1119
fprintf(stderr, "init_gnutls_global failed\n");
1120
exitcode = EXIT_FAILURE;
1121
goto end;
1122
} else {
1123
gnutls_initialized = true;
1124
}
1125
1126
if(mkdtemp(tempdir) == NULL){
1127
perror("mkdtemp");
1128
goto end;
1129
}
1130
tempdir_created = true;
1131
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1133
fprintf(stderr, "init_gpgme failed\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
} else {
1137
gpgme_initialized = true;
1138
}
1139
1140
if(interface[0] != '\0'){
988
1141
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
1142
if(if_index == 0){
990
1143
fprintf(stderr, "No such interface: \"%s\"\n", interface);
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
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
}
1148
1149
if(connect_to != NULL){
1150
/* Connect directly, do not use Zeroconf */
1151
/* (Mainly meant for debugging) */
1152
char *address = strrchr(connect_to, ':');
1153
if(address == NULL){
1154
fprintf(stderr, "No colon in address\n");
1155
exitcode = EXIT_FAILURE;
1156
goto end;
1157
}
1158
uint16_t port;
1159
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1160
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1161
or address[numchars+1] != '\0'){
1162
fprintf(stderr, "Bad port number\n");
1163
exitcode = EXIT_FAILURE;
1164
goto end;
1165
}
1166
port = (uint16_t)tmpmax;
1167
*address = '\0';
1168
address = connect_to;
1169
/* Colon in address indicates IPv6 */
1170
int af;
1171
if(strchr(address, ':') != NULL){
1172
af = AF_INET6;
1173
} else {
1174
af = AF_INET;
1175
}
1176
ret = start_mandos_communication(address, port, if_index, af);
1177
if(ret < 0){
1178
exitcode = EXIT_FAILURE;
1179
} else {
1180
exitcode = EXIT_SUCCESS;
1181
}
1182
goto end;
1183
}
1184
1185
if(not debug){
1186
avahi_set_log_function(empty_log);
1187
}
1188
1189
/* Initialize the pseudo-RNG for Avahi */
1190
srand((unsigned int) time(NULL));
1191
1192
/* Allocate main Avahi loop object */
1193
mc.simple_poll = avahi_simple_poll_new();
1194
if(mc.simple_poll == NULL){
1195
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
1200
{
1201
AvahiServerConfig config;
1202
/* Do not publish any local Zeroconf records */
1203
avahi_server_config_init(&config);
1204
config.publish_hinfo = 0;
1205
config.publish_addresses = 0;
1206
config.publish_workstation = 0;
1207
config.publish_domain = 0;
1208
1209
/* Allocate a new server */
1210
mc.server = avahi_server_new(avahi_simple_poll_get
1211
(mc.simple_poll), &config, NULL,
1212
NULL, &error);
1213
1214
/* Free the Avahi configuration data */
1215
avahi_server_config_free(&config);
1216
}
1217
1218
/* Check if creating the Avahi server object succeeded */
1219
if(mc.server == NULL){
1220
fprintf(stderr, "Failed to create Avahi server: %s\n",
1221
avahi_strerror(error));
1222
exitcode = EXIT_FAILURE;
1223
goto end;
1224
}
1225
1226
/* Create the Avahi service browser */
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1229
NULL, 0, browse_callback, NULL);
1230
if(sb == NULL){
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1232
avahi_strerror(avahi_server_errno(mc.server)));
1233
exitcode = EXIT_FAILURE;
1234
goto end;
1235
}
1236
1237
sigemptyset(&sigterm_action.sa_mask);
1238
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1239
if(ret == -1){
1240
perror("sigaddset");
1241
exitcode = EXIT_FAILURE;
1242
goto end;
1243
}
1244
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1245
if(ret == -1){
1246
perror("sigaddset");
1247
exitcode = EXIT_FAILURE;
1248
goto end;
1249
}
1250
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1251
if(ret == -1){
1252
perror("sigaddset");
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1257
if(ret == -1){
1258
perror("sigaction");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
/* Run the main loop */
1264
1265
if(debug){
1266
fprintf(stderr, "Starting Avahi loop search\n");
1267
}
1268
1269
avahi_simple_poll_loop(mc.simple_poll);
1270
1083
1271
end:
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){
1272
1273
if(debug){
1274
fprintf(stderr, "%s exiting\n", argv[0]);
1275
}
1276
1277
/* Cleanup things */
1278
if(sb != NULL)
1279
avahi_s_service_browser_free(sb);
1280
1281
if(mc.server != NULL)
1282
avahi_server_free(mc.server);
1283
1284
if(mc.simple_poll != NULL)
1285
avahi_simple_poll_free(mc.simple_poll);
1286
1287
if(gnutls_initialized){
1288
gnutls_certificate_free_credentials(mc.cred);
1289
gnutls_global_deinit();
1290
gnutls_dh_params_deinit(mc.dh_params);
1291
}
1292
1293
if(gpgme_initialized){
1294
gpgme_release(mc.ctx);
1295
}
1296
1297
/* Removes the temp directory used by GPGME */
1298
if(tempdir_created){
1299
DIR *d;
1300
struct dirent *direntry;
1301
d = opendir(tempdir);
1302
if(d == NULL){
1303
if(errno != ENOENT){
1115
1304
perror("opendir");
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;
1305
}
1306
} else {
1307
while(true){
1308
direntry = readdir(d);
1309
if(direntry == NULL){
1310
break;
1311
}
1312
/* Skip "." and ".." */
1313
if(direntry->d_name[0] == '.'
1314
and (direntry->d_name[1] == '\0'
1315
or (direntry->d_name[1] == '.'
1316
and direntry->d_name[2] == '\0'))){
1317
continue;
1318
}
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", tempdir,
1321
direntry->d_name);
1322
if(ret < 0){
1323
perror("asprintf");
1324
continue;
1325
}
1326
ret = remove(fullname);
1327
if(ret == -1){
1328
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1329
strerror(errno));
1330
}
1331
free(fullname);
1332
}
1333
closedir(d);
1334
}
1335
ret = rmdir(tempdir);
1336
if(ret == -1 and errno != ENOENT){
1337
perror("rmdir");
1338
}
1339
}
1340
1341
return exitcode;
1147
1342
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0