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- Committer: Teddy Hogeborn
- Date: 2009-02-09 19:33:46 UTC
- mfrom: (24.1.135 mandos)
- Revision ID: teddy@fukt.bsnet.se-20090209193346-5insyr1rsisor8dj
Merge from Björn:
* plugins.d/mandos-client.c (mc): Initialize globally.
(main): Better handling of signals.
* plugins.d/mandos-client.c (mc): Initialize globally.
(main): Better handling of signals.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- etc-plugins.d-README
- 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 = { .simple_poll = NULL, .server = NULL,
138
.dh_bits = 1024, .priority = "SECURE256"
139
":!CTYPE-X.509:+CTYPE-OPENPGP" };
140
128
141
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
142
* Make additional room in "buffer" for at least BUFFER_SIZE more
143
* bytes. "buffer_capacity" is how much is currently allocated,
131
144
* "buffer_length" is how much is already used.
132
145
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
146
size_t incbuffer(char **buffer, size_t buffer_length,
134
147
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
148
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
149
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
150
if(buffer == NULL){
138
151
return 0;
139
152
}
140
153
buffer_capacity += BUFFER_SIZE;
145
158
/*
146
159
* Initialize GPGME.
147
160
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
161
static bool init_gpgme(const char *seckey,
149
162
const char *pubkey, const char *tempdir){
150
163
int ret;
151
164
gpgme_error_t rc;
153
166
154
167
155
168
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
169
* Helper function to insert pub and seckey to the engine keyring.
157
170
*/
158
171
bool import_key(const char *filename){
159
172
int fd;
160
173
gpgme_data_t pgp_data;
161
174
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
175
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
176
if(fd == -1){
164
177
perror("open");
165
178
return false;
166
179
}
167
180
168
181
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
182
if(rc != GPG_ERR_NO_ERROR){
170
183
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
184
gpgme_strsource(rc), gpgme_strerror(rc));
172
185
return false;
173
186
}
174
187
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
188
rc = gpgme_op_import(mc.ctx, pgp_data);
189
if(rc != GPG_ERR_NO_ERROR){
177
190
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
191
gpgme_strsource(rc), gpgme_strerror(rc));
179
192
return false;
180
193
}
181
194
182
ret = TEMP_FAILURE_RETRY(close(fd));
195
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
196
if(ret == -1){
184
197
perror("close");
185
198
}
187
200
return true;
188
201
}
189
202
190
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
203
if(debug){
204
fprintf(stderr, "Initializing GPGME\n");
192
205
}
193
206
194
207
/* Init GPGME */
195
208
gpgme_check_version(NULL);
196
209
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
210
if(rc != GPG_ERR_NO_ERROR){
198
211
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
212
gpgme_strsource(rc), gpgme_strerror(rc));
200
213
return false;
201
214
}
202
215
203
216
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
217
rc = gpgme_get_engine_info(&engine_info);
218
if(rc != GPG_ERR_NO_ERROR){
206
219
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
220
gpgme_strsource(rc), gpgme_strerror(rc));
208
221
return false;
221
234
}
222
235
223
236
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
237
rc = gpgme_new(&(mc.ctx));
238
if(rc != GPG_ERR_NO_ERROR){
226
239
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
240
gpgme_strsource(rc), gpgme_strerror(rc));
228
241
return false;
229
242
}
230
243
231
if (not import_key(pubkey) or not import_key(seckey)){
244
if(not import_key(pubkey) or not import_key(seckey)){
232
245
return false;
233
246
}
234
247
239
252
* Decrypt OpenPGP data.
240
253
* Returns -1 on error
241
254
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
255
static ssize_t pgp_packet_decrypt(const char *cryptotext,
256
size_t crypto_size,
257
char **plaintext){
246
258
gpgme_data_t dh_crypto, dh_plain;
247
259
gpgme_error_t rc;
248
260
ssize_t ret;
249
261
size_t plaintext_capacity = 0;
250
262
ssize_t plaintext_length = 0;
251
263
252
if (debug){
264
if(debug){
253
265
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
266
}
255
267
256
268
/* Create new GPGME data buffer from memory cryptotext */
257
269
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
270
0);
259
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
260
272
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
273
gpgme_strsource(rc), gpgme_strerror(rc));
262
274
return -1;
264
276
265
277
/* Create new empty GPGME data buffer for the plaintext */
266
278
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
279
if(rc != GPG_ERR_NO_ERROR){
268
280
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
281
gpgme_strsource(rc), gpgme_strerror(rc));
270
282
gpgme_data_release(dh_crypto);
273
285
274
286
/* Decrypt data from the cryptotext data buffer to the plaintext
275
287
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
288
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
289
if(rc != GPG_ERR_NO_ERROR){
278
290
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
291
gpgme_strsource(rc), gpgme_strerror(rc));
280
292
plaintext_length = -1;
281
if (debug){
293
if(debug){
282
294
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
295
result = gpgme_op_decrypt_result(mc.ctx);
296
if(result == NULL){
285
297
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
298
} else {
287
299
fprintf(stderr, "Unsupported algorithm: %s\n",
314
326
}
315
327
316
328
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
329
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
330
perror("gpgme_data_seek");
319
331
plaintext_length = -1;
320
332
goto decrypt_end;
322
334
323
335
*plaintext = NULL;
324
336
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
337
plaintext_capacity = incbuffer(plaintext,
326
338
(size_t)plaintext_length,
327
339
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
340
if(plaintext_capacity == 0){
341
perror("incbuffer");
330
342
plaintext_length = -1;
331
343
goto decrypt_end;
332
344
}
334
346
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
347
BUFFER_SIZE);
336
348
/* Print the data, if any */
337
if (ret == 0){
349
if(ret == 0){
338
350
/* EOF */
339
351
break;
340
352
}
364
376
return plaintext_length;
365
377
}
366
378
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
379
static const char * safer_gnutls_strerror(int value){
380
const char *ret = gnutls_strerror(value); /* Spurious warning from
381
-Wunreachable-code */
382
if(ret == NULL)
370
383
ret = "(unknown)";
371
384
return ret;
372
385
}
377
390
fprintf(stderr, "GnuTLS: %s", string);
378
391
}
379
392
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
393
static int init_gnutls_global(const char *pubkeyfilename,
382
394
const char *seckeyfilename){
383
395
int ret;
384
396
387
399
}
388
400
389
401
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
402
if(ret != GNUTLS_E_SUCCESS){
403
fprintf(stderr, "GnuTLS global_init: %s\n",
404
safer_gnutls_strerror(ret));
393
405
return -1;
394
406
}
395
407
396
if (debug){
408
if(debug){
397
409
/* "Use a log level over 10 to enable all debugging options."
398
410
* - GnuTLS manual
399
411
*/
402
414
}
403
415
404
416
/* 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 ();
417
gnutls_certificate_allocate_credentials(&mc.cred);
418
if(ret != GNUTLS_E_SUCCESS){
419
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
420
from
421
-Wunreachable-code
422
*/
423
safer_gnutls_strerror(ret));
424
gnutls_global_deinit();
411
425
return -1;
412
426
}
413
427
418
432
}
419
433
420
434
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
435
(mc.cred, pubkeyfilename, seckeyfilename,
422
436
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
437
if(ret != GNUTLS_E_SUCCESS){
424
438
fprintf(stderr,
425
439
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
440
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
444
}
431
445
432
446
/* 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));
447
ret = gnutls_dh_params_init(&mc.dh_params);
448
if(ret != GNUTLS_E_SUCCESS){
449
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
450
" %s\n", safer_gnutls_strerror(ret));
437
451
goto globalfail;
438
452
}
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));
453
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
454
if(ret != GNUTLS_E_SUCCESS){
455
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
456
safer_gnutls_strerror(ret));
443
457
goto globalfail;
444
458
}
445
459
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
460
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
447
461
448
462
return 0;
449
463
450
464
globalfail:
451
465
452
gnutls_certificate_free_credentials(mc->cred);
466
gnutls_certificate_free_credentials(mc.cred);
453
467
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
468
gnutls_dh_params_deinit(mc.dh_params);
455
469
return -1;
456
470
}
457
471
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
472
static int init_gnutls_session(gnutls_session_t *session){
460
473
int ret;
461
474
/* GnuTLS session creation */
462
475
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
476
if(ret != GNUTLS_E_SUCCESS){
464
477
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
478
safer_gnutls_strerror(ret));
466
479
}
467
480
468
481
{
469
482
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
483
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
484
if(ret != GNUTLS_E_SUCCESS){
472
485
fprintf(stderr, "Syntax error at: %s\n", err);
473
486
fprintf(stderr, "GnuTLS error: %s\n",
474
487
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
488
gnutls_deinit(*session);
476
489
return -1;
477
490
}
478
491
}
479
492
480
493
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
494
mc.cred);
495
if(ret != GNUTLS_E_SUCCESS){
483
496
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
497
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
498
gnutls_deinit(*session);
486
499
return -1;
487
500
}
488
501
489
502
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
503
gnutls_certificate_server_set_request(*session,
504
GNUTLS_CERT_IGNORE);
492
505
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
506
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
494
507
495
508
return 0;
496
509
}
502
515
/* Called when a Mandos server is found */
503
516
static int start_mandos_communication(const char *ip, uint16_t port,
504
517
AvahiIfIndex if_index,
505
mandos_context *mc){
518
int af){
506
519
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
520
ssize_t sret;
521
union {
522
struct sockaddr_in in;
523
struct sockaddr_in6 in6;
524
} to;
508
525
char *buffer = NULL;
509
526
char *decrypted_buffer;
510
527
size_t buffer_length = 0;
512
529
ssize_t decrypted_buffer_size;
513
530
size_t written;
514
531
int retval = 0;
515
char interface[IF_NAMESIZE];
516
532
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
533
int pf; /* Protocol family */
534
535
switch(af){
536
case AF_INET6:
537
pf = PF_INET6;
538
break;
539
case AF_INET:
540
pf = PF_INET;
541
break;
542
default:
543
fprintf(stderr, "Bad address family: %d\n", af);
544
return -1;
545
}
546
547
ret = init_gnutls_session(&session);
548
if(ret != 0){
520
549
return -1;
521
550
}
522
551
523
552
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
553
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
525
554
"\n", ip, port);
526
555
}
527
556
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
557
tcp_sd = socket(pf, SOCK_STREAM, 0);
558
if(tcp_sd < 0){
530
559
perror("socket");
531
560
return -1;
532
561
}
533
562
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
563
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 ){
564
if(af == AF_INET6){
565
to.in6.sin6_family = (uint16_t)af;
566
ret = inet_pton(af, ip, &to.in6.sin6_addr);
567
} else { /* IPv4 */
568
to.in.sin_family = (sa_family_t)af;
569
ret = inet_pton(af, ip, &to.in.sin_addr);
570
}
571
if(ret < 0 ){
548
572
perror("inet_pton");
549
573
return -1;
550
574
}
552
576
fprintf(stderr, "Bad address: %s\n", ip);
553
577
return -1;
554
578
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
579
if(af == AF_INET6){
580
to.in6.sin6_port = htons(port); /* Spurious warnings from
581
-Wconversion and
582
-Wunreachable-code */
583
584
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
585
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
586
-Wunreachable-code*/
587
if(if_index == AVAHI_IF_UNSPEC){
588
fprintf(stderr, "An IPv6 link-local address is incomplete"
589
" without a network interface\n");
590
return -1;
591
}
592
/* Set the network interface number as scope */
593
to.in6.sin6_scope_id = (uint32_t)if_index;
594
}
595
} else {
596
to.in.sin_port = htons(port); /* Spurious warnings from
597
-Wconversion and
598
-Wunreachable-code */
599
}
558
600
559
601
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){
602
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
603
char interface[IF_NAMESIZE];
604
if(if_indextoname((unsigned int)if_index, interface) == NULL){
605
perror("if_indextoname");
606
} else {
607
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
608
ip, interface, port);
609
}
610
} else {
611
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
612
port);
613
}
614
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
615
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
616
const char *pcret;
617
if(af == AF_INET6){
618
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
619
sizeof(addrstr));
620
} else {
621
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
622
sizeof(addrstr));
623
}
624
if(pcret == NULL){
565
625
perror("inet_ntop");
566
626
} else {
567
627
if(strcmp(addrstr, ip) != 0){
570
630
}
571
631
}
572
632
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
633
if(af == AF_INET6){
634
ret = connect(tcp_sd, &to.in6, sizeof(to));
635
} else {
636
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
637
}
638
if(ret < 0){
575
639
perror("connect");
576
640
return -1;
577
641
}
578
642
579
643
const char *out = mandos_protocol_version;
580
644
written = 0;
581
while (true){
645
while(true){
582
646
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
647
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
648
out_size - written));
585
if (ret == -1){
649
if(ret == -1){
586
650
perror("write");
587
651
retval = -1;
588
652
goto mandos_end;
591
655
if(written < out_size){
592
656
continue;
593
657
} else {
594
if (out == mandos_protocol_version){
658
if(out == mandos_protocol_version){
595
659
written = 0;
596
660
out = "\r\n";
597
661
} else {
604
668
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
669
}
606
670
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
671
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
608
672
609
673
do{
610
ret = gnutls_handshake (session);
674
ret = gnutls_handshake(session);
611
675
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
612
676
613
if (ret != GNUTLS_E_SUCCESS){
677
if(ret != GNUTLS_E_SUCCESS){
614
678
if(debug){
615
679
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
680
gnutls_perror(ret);
617
681
}
618
682
retval = -1;
619
683
goto mandos_end;
622
686
/* Read OpenPGP packet that contains the wanted password */
623
687
624
688
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
689
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
626
690
ip);
627
691
}
628
692
629
693
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
694
buffer_capacity = incbuffer(&buffer, buffer_length,
631
695
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
696
if(buffer_capacity == 0){
697
perror("incbuffer");
634
698
retval = -1;
635
699
goto mandos_end;
636
700
}
637
701
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
702
sret = gnutls_record_recv(session, buffer+buffer_length,
703
BUFFER_SIZE);
704
if(sret == 0){
641
705
break;
642
706
}
643
if (ret < 0){
644
switch(ret){
707
if(sret < 0){
708
switch(sret){
645
709
case GNUTLS_E_INTERRUPTED:
646
710
case GNUTLS_E_AGAIN:
647
711
break;
648
712
case GNUTLS_E_REHANDSHAKE:
649
713
do{
650
ret = gnutls_handshake (session);
714
ret = gnutls_handshake(session);
651
715
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
652
if (ret < 0){
716
if(ret < 0){
653
717
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
gnutls_perror (ret);
718
gnutls_perror(ret);
655
719
retval = -1;
656
720
goto mandos_end;
657
721
}
660
724
fprintf(stderr, "Unknown error while reading data from"
661
725
" encrypted session with Mandos server\n");
662
726
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
727
gnutls_bye(session, GNUTLS_SHUT_RDWR);
664
728
goto mandos_end;
665
729
}
666
730
} else {
667
buffer_length += (size_t) ret;
731
buffer_length += (size_t) sret;
668
732
}
669
733
}
670
734
672
736
fprintf(stderr, "Closing TLS session\n");
673
737
}
674
738
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
739
gnutls_bye(session, GNUTLS_SHUT_RDWR);
676
740
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
741
if(buffer_length > 0){
742
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
743
buffer_length,
680
744
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
745
if(decrypted_buffer_size >= 0){
682
746
written = 0;
683
747
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
748
ret = (int)fwrite(decrypted_buffer + written, 1,
749
(size_t)decrypted_buffer_size - written,
750
stdout);
687
751
if(ret == 0 and ferror(stdout)){
688
752
if(debug){
689
753
fprintf(stderr, "Error writing encrypted data: %s\n",
706
770
707
771
mandos_end:
708
772
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
773
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
710
774
if(ret == -1){
711
775
perror("close");
712
776
}
713
gnutls_deinit (session);
777
gnutls_deinit(session);
714
778
return retval;
715
779
}
716
780
717
781
static void resolve_callback(AvahiSServiceResolver *r,
718
782
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
783
AvahiProtocol proto,
720
784
AvahiResolverEvent event,
721
785
const char *name,
722
786
const char *type,
727
791
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
792
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
793
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
794
AVAHI_GCC_UNUSED void* userdata){
732
795
assert(r);
733
796
734
797
/* Called whenever a service has been resolved successfully or
735
798
timed out */
736
799
737
switch (event) {
800
switch(event){
738
801
default:
739
802
case AVAHI_RESOLVER_FAILURE:
740
803
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
804
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
805
avahi_strerror(avahi_server_errno(mc.server)));
743
806
break;
744
807
745
808
case AVAHI_RESOLVER_FOUND:
748
811
avahi_address_snprint(ip, sizeof(ip), address);
749
812
if(debug){
750
813
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
814
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
815
ip, (intmax_t)interface, port);
753
816
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
817
int ret = start_mandos_communication(ip, port, interface,
818
avahi_proto_to_af(proto));
819
if(ret == 0){
820
avahi_simple_poll_quit(mc.simple_poll);
757
821
}
758
822
}
759
823
}
760
824
avahi_s_service_resolver_free(r);
761
825
}
762
826
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;
827
static void browse_callback(AvahiSServiceBrowser *b,
828
AvahiIfIndex interface,
829
AvahiProtocol protocol,
830
AvahiBrowserEvent event,
831
const char *name,
832
const char *type,
833
const char *domain,
834
AVAHI_GCC_UNUSED AvahiLookupResultFlags
835
flags,
836
AVAHI_GCC_UNUSED void* userdata){
774
837
assert(b);
775
838
776
839
/* Called whenever a new services becomes available on the LAN or
777
840
is removed from the LAN */
778
841
779
switch (event) {
842
switch(event){
780
843
default:
781
844
case AVAHI_BROWSER_FAILURE:
782
845
783
846
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
847
avahi_strerror(avahi_server_errno(mc.server)));
848
avahi_simple_poll_quit(mc.simple_poll);
786
849
return;
787
850
788
851
case AVAHI_BROWSER_NEW:
791
854
the callback function is called the Avahi server will free the
792
855
resolver for us. */
793
856
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
857
if(!(avahi_s_service_resolver_new(mc.server, interface,
795
858
protocol, name, type, domain,
796
859
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
860
resolve_callback, NULL)))
798
861
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
862
name, avahi_strerror(avahi_server_errno(mc.server)));
800
863
break;
801
864
802
865
case AVAHI_BROWSER_REMOVE:
811
874
}
812
875
}
813
876
877
sig_atomic_t quit_now = 0;
878
879
/* stop main loop after sigterm has been called */
880
static void handle_sigterm(__attribute__((unused)) int sig){
881
if(quit_now){
882
return;
883
}
884
quit_now = 1;
885
int old_errno = errno;
886
if(mc.simple_poll != NULL){
887
avahi_simple_poll_quit(mc.simple_poll);
888
}
889
errno = old_errno;
890
}
891
814
892
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);
893
AvahiSServiceBrowser *sb = NULL;
894
int error;
895
int ret;
896
intmax_t tmpmax;
897
int numchars;
898
int exitcode = EXIT_SUCCESS;
899
const char *interface = "eth0";
900
struct ifreq network;
901
int sd;
902
uid_t uid;
903
gid_t gid;
904
char *connect_to = NULL;
905
char tempdir[] = "/tmp/mandosXXXXXX";
906
bool tempdir_created = false;
907
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
908
const char *seckey = PATHDIR "/" SECKEY;
909
const char *pubkey = PATHDIR "/" PUBKEY;
910
911
/* Initialize Mandos context */
912
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
913
.dh_bits = 1024, .priority = "SECURE256"
914
":!CTYPE-X.509:+CTYPE-OPENPGP" };
915
bool gnutls_initialized = false;
916
bool gpgme_initialized = false;
917
double delay = 2.5;
918
919
struct sigaction old_sigterm_action;
920
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
921
922
{
923
struct argp_option options[] = {
924
{ .name = "debug", .key = 128,
925
.doc = "Debug mode", .group = 3 },
926
{ .name = "connect", .key = 'c',
927
.arg = "ADDRESS:PORT",
928
.doc = "Connect directly to a specific Mandos server",
929
.group = 1 },
930
{ .name = "interface", .key = 'i',
931
.arg = "NAME",
932
.doc = "Network interface that will be used to search for"
933
" Mandos servers",
934
.group = 1 },
935
{ .name = "seckey", .key = 's',
936
.arg = "FILE",
937
.doc = "OpenPGP secret key file base name",
938
.group = 1 },
939
{ .name = "pubkey", .key = 'p',
940
.arg = "FILE",
941
.doc = "OpenPGP public key file base name",
942
.group = 2 },
943
{ .name = "dh-bits", .key = 129,
944
.arg = "BITS",
945
.doc = "Bit length of the prime number used in the"
946
" Diffie-Hellman key exchange",
947
.group = 2 },
948
{ .name = "priority", .key = 130,
949
.arg = "STRING",
950
.doc = "GnuTLS priority string for the TLS handshake",
951
.group = 1 },
952
{ .name = "delay", .key = 131,
953
.arg = "SECONDS",
954
.doc = "Maximum delay to wait for interface startup",
955
.group = 2 },
956
{ .name = NULL }
957
};
958
959
error_t parse_opt(int key, char *arg,
960
struct argp_state *state){
961
switch(key){
962
case 128: /* --debug */
963
debug = true;
964
break;
965
case 'c': /* --connect */
966
connect_to = arg;
967
break;
968
case 'i': /* --interface */
969
interface = arg;
970
break;
971
case 's': /* --seckey */
972
seckey = arg;
973
break;
974
case 'p': /* --pubkey */
975
pubkey = arg;
976
break;
977
case 129: /* --dh-bits */
978
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
979
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
980
or arg[numchars] != '\0'){
981
fprintf(stderr, "Bad number of DH bits\n");
982
exit(EXIT_FAILURE);
983
}
984
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
985
break;
986
case 130: /* --priority */
987
mc.priority = arg;
988
break;
989
case 131: /* --delay */
990
ret = sscanf(arg, "%lf%n", &delay, &numchars);
991
if(ret < 1 or arg[numchars] != '\0'){
992
fprintf(stderr, "Bad delay\n");
993
exit(EXIT_FAILURE);
994
}
995
break;
996
case ARGP_KEY_ARG:
997
argp_usage(state);
998
case ARGP_KEY_END:
999
break;
1000
default:
1001
return ARGP_ERR_UNKNOWN;
1002
}
1003
return 0;
1004
}
1005
1006
struct argp argp = { .options = options, .parser = parse_opt,
1007
.args_doc = "",
1008
.doc = "Mandos client -- Get and decrypt"
1009
" passwords from a Mandos server" };
1010
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1011
if(ret == ARGP_ERR_UNKNOWN){
1012
fprintf(stderr, "Unknown error while parsing arguments\n");
1013
exitcode = EXIT_FAILURE;
1014
goto end;
1015
}
1016
}
1017
1018
if(not debug){
1019
avahi_set_log_function(empty_log);
1020
}
1021
1022
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1023
from the signal handler */
1024
/* Initialize the pseudo-RNG for Avahi */
1025
srand((unsigned int) time(NULL));
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if(mc.simple_poll == NULL){
1028
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
sigemptyset(&sigterm_action.sa_mask);
1034
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1035
if(ret == -1){
1036
perror("sigaddset");
1037
exitcode = EXIT_FAILURE;
1038
goto end;
1039
}
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1041
if(ret == -1){
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1047
if(ret == -1){
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1053
if(ret == -1){
1054
perror("sigaction");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
1059
/* If the interface is down, bring it up */
1060
if(interface[0] != '\0'){
1061
#ifdef __linux__
1062
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1063
messages to mess up the prompt */
1064
ret = klogctl(8, NULL, 5);
1065
bool restore_loglevel = true;
1066
if(ret == -1){
1067
restore_loglevel = false;
1068
perror("klogctl");
1069
}
1070
#endif /* __linux__ */
1071
1072
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1073
if(sd < 0){
1074
perror("socket");
1075
exitcode = EXIT_FAILURE;
1076
#ifdef __linux__
1077
if(restore_loglevel){
1078
ret = klogctl(7, NULL, 0);
1079
if(ret == -1){
1080
perror("klogctl");
1081
}
1082
}
1083
#endif /* __linux__ */
1084
goto end;
1085
}
1086
strcpy(network.ifr_name, interface);
1087
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1088
if(ret == -1){
1089
perror("ioctl SIOCGIFFLAGS");
1090
#ifdef __linux__
1091
if(restore_loglevel){
1092
ret = klogctl(7, NULL, 0);
1093
if(ret == -1){
1094
perror("klogctl");
1095
}
1096
}
1097
#endif /* __linux__ */
1098
exitcode = EXIT_FAILURE;
1099
goto end;
1100
}
1101
if((network.ifr_flags & IFF_UP) == 0){
1102
network.ifr_flags |= IFF_UP;
1103
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1104
if(ret == -1){
1105
perror("ioctl SIOCSIFFLAGS");
1106
exitcode = EXIT_FAILURE;
1107
#ifdef __linux__
1108
if(restore_loglevel){
1109
ret = klogctl(7, NULL, 0);
1110
if(ret == -1){
1111
perror("klogctl");
895
1112
}
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
1113
}
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;
1114
#endif /* __linux__ */
918
1115
goto end;
919
1116
}
920
1117
}
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);
1118
/* sleep checking until interface is running */
1119
for(int i=0; i < delay * 4; i++){
931
1120
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
1121
if(ret == -1){
933
1122
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));
1123
} else if(network.ifr_flags & IFF_RUNNING){
1124
break;
1125
}
1126
struct timespec sleeptime = { .tv_nsec = 250000000 };
1127
ret = nanosleep(&sleeptime, NULL);
1128
if(ret == -1 and errno != EINTR){
1129
perror("nanosleep");
1130
}
1131
}
1132
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1133
if(ret == -1){
1134
perror("close");
1135
}
1136
#ifdef __linux__
1137
if(restore_loglevel){
1138
/* Restores kernel loglevel to default */
1139
ret = klogctl(7, NULL, 0);
947
1140
if(ret == -1){
948
perror("close");
1141
perror("klogctl");
949
1142
}
950
1143
}
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
1144
#endif /* __linux__ */
1145
}
1146
1147
uid = getuid();
1148
gid = getgid();
1149
1150
errno = 0;
1151
setgid(gid);
1152
if(ret == -1){
1153
perror("setgid");
1154
}
1155
1156
ret = setuid(uid);
1157
if(ret == -1){
1158
perror("setuid");
1159
}
1160
1161
ret = init_gnutls_global(pubkey, seckey);
1162
if(ret == -1){
1163
fprintf(stderr, "init_gnutls_global failed\n");
1164
exitcode = EXIT_FAILURE;
1165
goto end;
1166
} else {
1167
gnutls_initialized = true;
1168
}
1169
1170
if(mkdtemp(tempdir) == NULL){
1171
perror("mkdtemp");
1172
goto end;
1173
}
1174
tempdir_created = true;
1175
1176
if(not init_gpgme(pubkey, seckey, tempdir)){
1177
fprintf(stderr, "init_gpgme failed\n");
1178
exitcode = EXIT_FAILURE;
1179
goto end;
1180
} else {
1181
gpgme_initialized = true;
1182
}
1183
1184
if(interface[0] != '\0'){
988
1185
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
1186
if(if_index == 0){
990
1187
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
1188
exitcode = EXIT_FAILURE;
1189
goto end;
1190
}
1191
}
1192
1193
if(connect_to != NULL){
1194
/* Connect directly, do not use Zeroconf */
1195
/* (Mainly meant for debugging) */
1196
char *address = strrchr(connect_to, ':');
1197
if(address == NULL){
1198
fprintf(stderr, "No colon in address\n");
1199
exitcode = EXIT_FAILURE;
1200
goto end;
1201
}
1202
uint16_t port;
1203
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1204
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1205
or address[numchars+1] != '\0'){
1206
fprintf(stderr, "Bad port number\n");
1207
exitcode = EXIT_FAILURE;
1208
goto end;
1209
}
1210
port = (uint16_t)tmpmax;
1211
*address = '\0';
1212
address = connect_to;
1213
/* Colon in address indicates IPv6 */
1214
int af;
1215
if(strchr(address, ':') != NULL){
1216
af = AF_INET6;
1217
} else {
1218
af = AF_INET;
1219
}
1220
ret = start_mandos_communication(address, port, if_index, af);
1221
if(ret < 0){
1222
exitcode = EXIT_FAILURE;
1223
} else {
1224
exitcode = EXIT_SUCCESS;
1225
}
1226
goto end;
1227
}
1228
1229
{
1230
AvahiServerConfig config;
1231
/* Do not publish any local Zeroconf records */
1232
avahi_server_config_init(&config);
1233
config.publish_hinfo = 0;
1234
config.publish_addresses = 0;
1235
config.publish_workstation = 0;
1236
config.publish_domain = 0;
1237
1238
/* Allocate a new server */
1239
mc.server = avahi_server_new(avahi_simple_poll_get
1240
(mc.simple_poll), &config, NULL,
1241
NULL, &error);
1242
1243
/* Free the Avahi configuration data */
1244
avahi_server_config_free(&config);
1245
}
1246
1247
/* Check if creating the Avahi server object succeeded */
1248
if(mc.server == NULL){
1249
fprintf(stderr, "Failed to create Avahi server: %s\n",
1250
avahi_strerror(error));
1251
exitcode = EXIT_FAILURE;
1252
goto end;
1253
}
1254
1255
/* Create the Avahi service browser */
1256
sb = avahi_s_service_browser_new(mc.server, if_index,
1257
AVAHI_PROTO_INET6, "_mandos._tcp",
1258
NULL, 0, browse_callback, NULL);
1259
if(sb == NULL){
1260
fprintf(stderr, "Failed to create service browser: %s\n",
1261
avahi_strerror(avahi_server_errno(mc.server)));
1262
exitcode = EXIT_FAILURE;
1263
goto end;
1264
}
1265
1266
/* Run the main loop */
1267
1268
if(debug){
1269
fprintf(stderr, "Starting Avahi loop search\n");
1270
}
1271
1272
avahi_simple_poll_loop(mc.simple_poll);
1273
1083
1274
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){
1275
1276
if(debug){
1277
fprintf(stderr, "%s exiting\n", argv[0]);
1278
}
1279
1280
/* Cleanup things */
1281
if(sb != NULL)
1282
avahi_s_service_browser_free(sb);
1283
1284
if(mc.server != NULL)
1285
avahi_server_free(mc.server);
1286
1287
if(mc.simple_poll != NULL)
1288
avahi_simple_poll_free(mc.simple_poll);
1289
1290
if(gnutls_initialized){
1291
gnutls_certificate_free_credentials(mc.cred);
1292
gnutls_global_deinit();
1293
gnutls_dh_params_deinit(mc.dh_params);
1294
}
1295
1296
if(gpgme_initialized){
1297
gpgme_release(mc.ctx);
1298
}
1299
1300
/* Removes the temp directory used by GPGME */
1301
if(tempdir_created){
1302
DIR *d;
1303
struct dirent *direntry;
1304
d = opendir(tempdir);
1305
if(d == NULL){
1306
if(errno != ENOENT){
1115
1307
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;
1308
}
1309
} else {
1310
while(true){
1311
direntry = readdir(d);
1312
if(direntry == NULL){
1313
break;
1314
}
1315
/* Skip "." and ".." */
1316
if(direntry->d_name[0] == '.'
1317
and (direntry->d_name[1] == '\0'
1318
or (direntry->d_name[1] == '.'
1319
and direntry->d_name[2] == '\0'))){
1320
continue;
1321
}
1322
char *fullname = NULL;
1323
ret = asprintf(&fullname, "%s/%s", tempdir,
1324
direntry->d_name);
1325
if(ret < 0){
1326
perror("asprintf");
1327
continue;
1328
}
1329
ret = remove(fullname);
1330
if(ret == -1){
1331
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1332
strerror(errno));
1333
}
1334
free(fullname);
1335
}
1336
closedir(d);
1337
}
1338
ret = rmdir(tempdir);
1339
if(ret == -1 and errno != ENOENT){
1340
perror("rmdir");
1341
}
1342
}
1343
1344
return exitcode;
1147
1345
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0