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- Committer: Björn Påhlsson
- Date: 2009-02-09 05:09:39 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 307.
- Revision ID: belorn@braxen-20090209050939-ml95liuwtbn9kjtb
plugin-runner: Added support for empty string arguments
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
- files added:
- NEWS
- 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(), sigaction(), SIGTERM, sigaction */
79
#ifdef __linux__
80
#include <sys/klog.h> /* klogctl() */
81
#endif
74
82
75
83
/* Avahi */
76
84
/* All Avahi types, constants and functions
89
97
gnutls_*
90
98
init_gnutls_session(),
91
99
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
100
#include <gnutls/openpgp.h>
101
/* gnutls_certificate_set_openpgp_key_file(),
93
102
GNUTLS_OPENPGP_FMT_BASE64 */
94
103
95
104
/* GPGME */
101
110
102
111
#define BUFFER_SIZE 256
103
112
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
113
#define PATHDIR "/conf/conf.d/mandos"
109
114
#define SECKEY "seckey.txt"
110
115
#define PUBKEY "pubkey.txt"
111
116
112
117
bool debug = false;
113
118
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
119
const char *argp_program_version = "mandos-client " VERSION;
115
120
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
121
117
122
/* Used for passing in values through the Avahi callback functions */
125
130
gpgme_ctx_t ctx;
126
131
} mandos_context;
127
132
133
/* global context so signal handler can reach it*/
134
mandos_context mc;
135
128
136
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
137
* Make additional room in "buffer" for at least BUFFER_SIZE
138
* additional bytes. "buffer_capacity" is how much is currently
139
* allocated, "buffer_length" is how much is already used.
132
140
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
141
size_t incbuffer(char **buffer, size_t buffer_length,
134
142
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
143
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
144
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
145
if(buffer == NULL){
138
146
return 0;
139
147
}
140
148
buffer_capacity += BUFFER_SIZE;
145
153
/*
146
154
* Initialize GPGME.
147
155
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
156
static bool init_gpgme(const char *seckey,
149
157
const char *pubkey, const char *tempdir){
150
158
int ret;
151
159
gpgme_error_t rc;
153
161
154
162
155
163
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
164
* Helper function to insert pub and seckey to the engine keyring.
157
165
*/
158
166
bool import_key(const char *filename){
159
167
int fd;
160
168
gpgme_data_t pgp_data;
161
169
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
170
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
171
if(fd == -1){
164
172
perror("open");
165
173
return false;
166
174
}
167
175
168
176
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
177
if(rc != GPG_ERR_NO_ERROR){
170
178
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
179
gpgme_strsource(rc), gpgme_strerror(rc));
172
180
return false;
173
181
}
174
182
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
183
rc = gpgme_op_import(mc.ctx, pgp_data);
184
if(rc != GPG_ERR_NO_ERROR){
177
185
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
186
gpgme_strsource(rc), gpgme_strerror(rc));
179
187
return false;
180
188
}
181
189
182
ret = TEMP_FAILURE_RETRY(close(fd));
190
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
191
if(ret == -1){
184
192
perror("close");
185
193
}
187
195
return true;
188
196
}
189
197
190
if (debug){
198
if(debug){
191
199
fprintf(stderr, "Initialize gpgme\n");
192
200
}
193
201
194
202
/* Init GPGME */
195
203
gpgme_check_version(NULL);
196
204
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
205
if(rc != GPG_ERR_NO_ERROR){
198
206
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
207
gpgme_strsource(rc), gpgme_strerror(rc));
200
208
return false;
201
209
}
202
210
203
211
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
212
rc = gpgme_get_engine_info(&engine_info);
213
if(rc != GPG_ERR_NO_ERROR){
206
214
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
215
gpgme_strsource(rc), gpgme_strerror(rc));
208
216
return false;
221
229
}
222
230
223
231
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
232
rc = gpgme_new(&(mc.ctx));
233
if(rc != GPG_ERR_NO_ERROR){
226
234
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
235
gpgme_strsource(rc), gpgme_strerror(rc));
228
236
return false;
229
237
}
230
238
231
if (not import_key(pubkey) or not import_key(seckey)){
239
if(not import_key(pubkey) or not import_key(seckey)){
232
240
return false;
233
241
}
234
242
239
247
* Decrypt OpenPGP data.
240
248
* Returns -1 on error
241
249
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
250
static ssize_t pgp_packet_decrypt(const char *cryptotext,
251
size_t crypto_size,
252
char **plaintext){
246
253
gpgme_data_t dh_crypto, dh_plain;
247
254
gpgme_error_t rc;
248
255
ssize_t ret;
249
256
size_t plaintext_capacity = 0;
250
257
ssize_t plaintext_length = 0;
251
258
252
if (debug){
259
if(debug){
253
260
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
261
}
255
262
256
263
/* Create new GPGME data buffer from memory cryptotext */
257
264
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
265
0);
259
if (rc != GPG_ERR_NO_ERROR){
266
if(rc != GPG_ERR_NO_ERROR){
260
267
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
268
gpgme_strsource(rc), gpgme_strerror(rc));
262
269
return -1;
264
271
265
272
/* Create new empty GPGME data buffer for the plaintext */
266
273
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
274
if(rc != GPG_ERR_NO_ERROR){
268
275
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
276
gpgme_strsource(rc), gpgme_strerror(rc));
270
277
gpgme_data_release(dh_crypto);
273
280
274
281
/* Decrypt data from the cryptotext data buffer to the plaintext
275
282
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
283
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
284
if(rc != GPG_ERR_NO_ERROR){
278
285
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
286
gpgme_strsource(rc), gpgme_strerror(rc));
280
287
plaintext_length = -1;
281
if (debug){
288
if(debug){
282
289
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
290
result = gpgme_op_decrypt_result(mc.ctx);
291
if(result == NULL){
285
292
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
293
} else {
287
294
fprintf(stderr, "Unsupported algorithm: %s\n",
314
321
}
315
322
316
323
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
324
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
325
perror("gpgme_data_seek");
319
326
plaintext_length = -1;
320
327
goto decrypt_end;
322
329
323
330
*plaintext = NULL;
324
331
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
332
plaintext_capacity = incbuffer(plaintext,
326
333
(size_t)plaintext_length,
327
334
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
335
if(plaintext_capacity == 0){
336
perror("incbuffer");
330
337
plaintext_length = -1;
331
338
goto decrypt_end;
332
339
}
334
341
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
342
BUFFER_SIZE);
336
343
/* Print the data, if any */
337
if (ret == 0){
344
if(ret == 0){
338
345
/* EOF */
339
346
break;
340
347
}
364
371
return plaintext_length;
365
372
}
366
373
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
374
static const char * safer_gnutls_strerror(int value){
375
const char *ret = gnutls_strerror(value); /* Spurious warning from
376
-Wunreachable-code */
377
if(ret == NULL)
370
378
ret = "(unknown)";
371
379
return ret;
372
380
}
377
385
fprintf(stderr, "GnuTLS: %s", string);
378
386
}
379
387
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
388
static int init_gnutls_global(const char *pubkeyfilename,
382
389
const char *seckeyfilename){
383
390
int ret;
384
391
387
394
}
388
395
389
396
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
397
if(ret != GNUTLS_E_SUCCESS){
398
fprintf(stderr, "GnuTLS global_init: %s\n",
399
safer_gnutls_strerror(ret));
393
400
return -1;
394
401
}
395
402
396
if (debug){
403
if(debug){
397
404
/* "Use a log level over 10 to enable all debugging options."
398
405
* - GnuTLS manual
399
406
*/
402
409
}
403
410
404
411
/* 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 ();
412
gnutls_certificate_allocate_credentials(&mc.cred);
413
if(ret != GNUTLS_E_SUCCESS){
414
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
415
from
416
-Wunreachable-code
417
*/
418
safer_gnutls_strerror(ret));
419
gnutls_global_deinit();
411
420
return -1;
412
421
}
413
422
418
427
}
419
428
420
429
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
430
(mc.cred, pubkeyfilename, seckeyfilename,
422
431
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
432
if(ret != GNUTLS_E_SUCCESS){
424
433
fprintf(stderr,
425
434
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
435
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
439
}
431
440
432
441
/* 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));
442
ret = gnutls_dh_params_init(&mc.dh_params);
443
if(ret != GNUTLS_E_SUCCESS){
444
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
445
" %s\n", safer_gnutls_strerror(ret));
437
446
goto globalfail;
438
447
}
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));
448
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
449
if(ret != GNUTLS_E_SUCCESS){
450
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
451
safer_gnutls_strerror(ret));
443
452
goto globalfail;
444
453
}
445
454
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
455
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
447
456
448
457
return 0;
449
458
450
459
globalfail:
451
460
452
gnutls_certificate_free_credentials(mc->cred);
461
gnutls_certificate_free_credentials(mc.cred);
453
462
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
463
gnutls_dh_params_deinit(mc.dh_params);
455
464
return -1;
456
465
}
457
466
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
467
static int init_gnutls_session(gnutls_session_t *session){
460
468
int ret;
461
469
/* GnuTLS session creation */
462
470
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
471
if(ret != GNUTLS_E_SUCCESS){
464
472
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
473
safer_gnutls_strerror(ret));
466
474
}
467
475
468
476
{
469
477
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
478
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
479
if(ret != GNUTLS_E_SUCCESS){
472
480
fprintf(stderr, "Syntax error at: %s\n", err);
473
481
fprintf(stderr, "GnuTLS error: %s\n",
474
482
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
483
gnutls_deinit(*session);
476
484
return -1;
477
485
}
478
486
}
479
487
480
488
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
489
mc.cred);
490
if(ret != GNUTLS_E_SUCCESS){
483
491
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
492
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
493
gnutls_deinit(*session);
486
494
return -1;
487
495
}
488
496
489
497
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
498
gnutls_certificate_server_set_request(*session,
499
GNUTLS_CERT_IGNORE);
492
500
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
494
502
495
503
return 0;
496
504
}
502
510
/* Called when a Mandos server is found */
503
511
static int start_mandos_communication(const char *ip, uint16_t port,
504
512
AvahiIfIndex if_index,
505
mandos_context *mc){
513
int af){
506
514
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
515
ssize_t sret;
516
union {
517
struct sockaddr_in in;
518
struct sockaddr_in6 in6;
519
} to;
508
520
char *buffer = NULL;
509
521
char *decrypted_buffer;
510
522
size_t buffer_length = 0;
512
524
ssize_t decrypted_buffer_size;
513
525
size_t written;
514
526
int retval = 0;
515
char interface[IF_NAMESIZE];
516
527
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
528
int pf; /* Protocol family */
529
530
switch(af){
531
case AF_INET6:
532
pf = PF_INET6;
533
break;
534
case AF_INET:
535
pf = PF_INET;
536
break;
537
default:
538
fprintf(stderr, "Bad address family: %d\n", af);
539
return -1;
540
}
541
542
ret = init_gnutls_session(&session);
543
if(ret != 0){
520
544
return -1;
521
545
}
522
546
523
547
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
548
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
525
549
"\n", ip, port);
526
550
}
527
551
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
552
tcp_sd = socket(pf, SOCK_STREAM, 0);
553
if(tcp_sd < 0){
530
554
perror("socket");
531
555
return -1;
532
556
}
533
557
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
558
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 ){
559
if(af == AF_INET6){
560
to.in6.sin6_family = (uint16_t)af;
561
ret = inet_pton(af, ip, &to.in6.sin6_addr);
562
} else { /* IPv4 */
563
to.in.sin_family = (sa_family_t)af;
564
ret = inet_pton(af, ip, &to.in.sin_addr);
565
}
566
if(ret < 0 ){
548
567
perror("inet_pton");
549
568
return -1;
550
569
}
552
571
fprintf(stderr, "Bad address: %s\n", ip);
553
572
return -1;
554
573
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
574
if(af == AF_INET6){
575
to.in6.sin6_port = htons(port); /* Spurious warnings from
576
-Wconversion and
577
-Wunreachable-code */
578
579
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
580
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
581
-Wunreachable-code*/
582
if(if_index == AVAHI_IF_UNSPEC){
583
fprintf(stderr, "An IPv6 link-local address is incomplete"
584
" without a network interface\n");
585
return -1;
586
}
587
/* Set the network interface number as scope */
588
to.in6.sin6_scope_id = (uint32_t)if_index;
589
}
590
} else {
591
to.in.sin_port = htons(port); /* Spurious warnings from
592
-Wconversion and
593
-Wunreachable-code */
594
}
558
595
559
596
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){
597
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
598
char interface[IF_NAMESIZE];
599
if(if_indextoname((unsigned int)if_index, interface) == NULL){
600
perror("if_indextoname");
601
} else {
602
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
603
ip, interface, port);
604
}
605
} else {
606
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
607
port);
608
}
609
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
610
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
611
const char *pcret;
612
if(af == AF_INET6){
613
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
614
sizeof(addrstr));
615
} else {
616
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
617
sizeof(addrstr));
618
}
619
if(pcret == NULL){
565
620
perror("inet_ntop");
566
621
} else {
567
622
if(strcmp(addrstr, ip) != 0){
570
625
}
571
626
}
572
627
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
628
if(af == AF_INET6){
629
ret = connect(tcp_sd, &to.in6, sizeof(to));
630
} else {
631
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
632
}
633
if(ret < 0){
575
634
perror("connect");
576
635
return -1;
577
636
}
578
637
579
638
const char *out = mandos_protocol_version;
580
639
written = 0;
581
while (true){
640
while(true){
582
641
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
643
out_size - written));
585
if (ret == -1){
644
if(ret == -1){
586
645
perror("write");
587
646
retval = -1;
588
647
goto mandos_end;
591
650
if(written < out_size){
592
651
continue;
593
652
} else {
594
if (out == mandos_protocol_version){
653
if(out == mandos_protocol_version){
595
654
written = 0;
596
655
out = "\r\n";
597
656
} else {
604
663
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
664
}
606
665
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
666
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
608
667
609
668
do{
610
ret = gnutls_handshake (session);
669
ret = gnutls_handshake(session);
611
670
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
612
671
613
if (ret != GNUTLS_E_SUCCESS){
672
if(ret != GNUTLS_E_SUCCESS){
614
673
if(debug){
615
674
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
675
gnutls_perror(ret);
617
676
}
618
677
retval = -1;
619
678
goto mandos_end;
622
681
/* Read OpenPGP packet that contains the wanted password */
623
682
624
683
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
626
685
ip);
627
686
}
628
687
629
688
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
buffer_capacity = incbuffer(&buffer, buffer_length,
631
690
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
691
if(buffer_capacity == 0){
692
perror("incbuffer");
634
693
retval = -1;
635
694
goto mandos_end;
636
695
}
637
696
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
697
sret = gnutls_record_recv(session, buffer+buffer_length,
698
BUFFER_SIZE);
699
if(sret == 0){
641
700
break;
642
701
}
643
if (ret < 0){
644
switch(ret){
702
if(sret < 0){
703
switch(sret){
645
704
case GNUTLS_E_INTERRUPTED:
646
705
case GNUTLS_E_AGAIN:
647
706
break;
648
707
case GNUTLS_E_REHANDSHAKE:
649
708
do{
650
ret = gnutls_handshake (session);
709
ret = gnutls_handshake(session);
651
710
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
652
if (ret < 0){
711
if(ret < 0){
653
712
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
gnutls_perror (ret);
713
gnutls_perror(ret);
655
714
retval = -1;
656
715
goto mandos_end;
657
716
}
660
719
fprintf(stderr, "Unknown error while reading data from"
661
720
" encrypted session with Mandos server\n");
662
721
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
gnutls_bye(session, GNUTLS_SHUT_RDWR);
664
723
goto mandos_end;
665
724
}
666
725
} else {
667
buffer_length += (size_t) ret;
726
buffer_length += (size_t) sret;
668
727
}
669
728
}
670
729
672
731
fprintf(stderr, "Closing TLS session\n");
673
732
}
674
733
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
gnutls_bye(session, GNUTLS_SHUT_RDWR);
676
735
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
736
if(buffer_length > 0){
737
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
738
buffer_length,
680
739
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
740
if(decrypted_buffer_size >= 0){
682
741
written = 0;
683
742
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
743
ret = (int)fwrite(decrypted_buffer + written, 1,
744
(size_t)decrypted_buffer_size - written,
745
stdout);
687
746
if(ret == 0 and ferror(stdout)){
688
747
if(debug){
689
748
fprintf(stderr, "Error writing encrypted data: %s\n",
706
765
707
766
mandos_end:
708
767
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
768
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
710
769
if(ret == -1){
711
770
perror("close");
712
771
}
713
gnutls_deinit (session);
772
gnutls_deinit(session);
714
773
return retval;
715
774
}
716
775
717
776
static void resolve_callback(AvahiSServiceResolver *r,
718
777
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
AvahiProtocol proto,
720
779
AvahiResolverEvent event,
721
780
const char *name,
722
781
const char *type,
727
786
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
787
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
788
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
789
__attribute__((unused)) void* userdata){
732
790
assert(r);
733
791
734
792
/* Called whenever a service has been resolved successfully or
735
793
timed out */
736
794
737
switch (event) {
795
switch(event){
738
796
default:
739
797
case AVAHI_RESOLVER_FAILURE:
740
798
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
799
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
800
avahi_strerror(avahi_server_errno(mc.server)));
743
801
break;
744
802
745
803
case AVAHI_RESOLVER_FOUND:
748
806
avahi_address_snprint(ip, sizeof(ip), address);
749
807
if(debug){
750
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
753
811
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
812
int ret = start_mandos_communication(ip, port, interface,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
815
avahi_simple_poll_quit(mc.simple_poll);
757
816
}
758
817
}
759
818
}
760
819
avahi_s_service_resolver_free(r);
761
820
}
762
821
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;
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
__attribute__((unused)) void* userdata){
774
832
assert(b);
775
833
776
834
/* Called whenever a new services becomes available on the LAN or
777
835
is removed from the LAN */
778
836
779
switch (event) {
837
switch(event){
780
838
default:
781
839
case AVAHI_BROWSER_FAILURE:
782
840
783
841
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
842
avahi_strerror(avahi_server_errno(mc.server)));
843
avahi_simple_poll_quit(mc.simple_poll);
786
844
return;
787
845
788
846
case AVAHI_BROWSER_NEW:
791
849
the callback function is called the Avahi server will free the
792
850
resolver for us. */
793
851
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
852
if(!(avahi_s_service_resolver_new(mc.server, interface,
795
853
protocol, name, type, domain,
796
854
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
855
resolve_callback, NULL)))
798
856
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
857
name, avahi_strerror(avahi_server_errno(mc.server)));
800
858
break;
801
859
802
860
case AVAHI_BROWSER_REMOVE:
811
869
}
812
870
}
813
871
872
static void handle_sigterm(__attribute__((unused)) int sig){
873
int old_errno = errno;
874
avahi_simple_poll_quit(mc.simple_poll);
875
errno = old_errno;
876
}
877
814
878
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);
879
AvahiSServiceBrowser *sb = NULL;
880
int error;
881
int ret;
882
intmax_t tmpmax;
883
int numchars;
884
int exitcode = EXIT_SUCCESS;
885
const char *interface = "eth0";
886
struct ifreq network;
887
int sd;
888
uid_t uid;
889
gid_t gid;
890
char *connect_to = NULL;
891
char tempdir[] = "/tmp/mandosXXXXXX";
892
bool tempdir_created = false;
893
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
894
const char *seckey = PATHDIR "/" SECKEY;
895
const char *pubkey = PATHDIR "/" PUBKEY;
896
897
bool gnutls_initialized = false;
898
bool gpgme_initialized = false;
899
double delay = 2.5;
900
901
struct sigaction old_sigterm_action;
902
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
903
904
/* Initialize mandos context */
905
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
906
.dh_bits = 1024, .priority = "SECURE256"
907
":!CTYPE-X.509:+CTYPE-OPENPGP" };
908
909
{
910
struct argp_option options[] = {
911
{ .name = "debug", .key = 128,
912
.doc = "Debug mode", .group = 3 },
913
{ .name = "connect", .key = 'c',
914
.arg = "ADDRESS:PORT",
915
.doc = "Connect directly to a specific Mandos server",
916
.group = 1 },
917
{ .name = "interface", .key = 'i',
918
.arg = "NAME",
919
.doc = "Network interface that will be used to search for"
920
" Mandos servers",
921
.group = 1 },
922
{ .name = "seckey", .key = 's',
923
.arg = "FILE",
924
.doc = "OpenPGP secret key file base name",
925
.group = 1 },
926
{ .name = "pubkey", .key = 'p',
927
.arg = "FILE",
928
.doc = "OpenPGP public key file base name",
929
.group = 2 },
930
{ .name = "dh-bits", .key = 129,
931
.arg = "BITS",
932
.doc = "Bit length of the prime number used in the"
933
" Diffie-Hellman key exchange",
934
.group = 2 },
935
{ .name = "priority", .key = 130,
936
.arg = "STRING",
937
.doc = "GnuTLS priority string for the TLS handshake",
938
.group = 1 },
939
{ .name = "delay", .key = 131,
940
.arg = "SECONDS",
941
.doc = "Maximum delay to wait for interface startup",
942
.group = 2 },
943
{ .name = NULL }
944
};
945
946
error_t parse_opt(int key, char *arg,
947
struct argp_state *state){
948
switch(key){
949
case 128: /* --debug */
950
debug = true;
951
break;
952
case 'c': /* --connect */
953
connect_to = arg;
954
break;
955
case 'i': /* --interface */
956
interface = arg;
957
break;
958
case 's': /* --seckey */
959
seckey = arg;
960
break;
961
case 'p': /* --pubkey */
962
pubkey = arg;
963
break;
964
case 129: /* --dh-bits */
965
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
966
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
967
or arg[numchars] != '\0'){
968
fprintf(stderr, "Bad number of DH bits\n");
969
exit(EXIT_FAILURE);
970
}
971
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
972
break;
973
case 130: /* --priority */
974
mc.priority = arg;
975
break;
976
case 131: /* --delay */
977
ret = sscanf(arg, "%lf%n", &delay, &numchars);
978
if(ret < 1 or arg[numchars] != '\0'){
979
fprintf(stderr, "Bad delay\n");
980
exit(EXIT_FAILURE);
981
}
982
break;
983
case ARGP_KEY_ARG:
984
argp_usage(state);
985
case ARGP_KEY_END:
986
break;
987
default:
988
return ARGP_ERR_UNKNOWN;
989
}
990
return 0;
991
}
992
993
struct argp argp = { .options = options, .parser = parse_opt,
994
.args_doc = "",
995
.doc = "Mandos client -- Get and decrypt"
996
" passwords from a Mandos server" };
997
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
998
if(ret == ARGP_ERR_UNKNOWN){
999
fprintf(stderr, "Unknown error while parsing arguments\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
}
1004
1005
/* If the interface is down, bring it up */
1006
if(interface[0] != '\0'){
1007
#ifdef __linux__
1008
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1009
messages to mess up the prompt */
1010
ret = klogctl(8, NULL, 5);
1011
bool restore_loglevel = true;
1012
if(ret == -1){
1013
restore_loglevel = false;
1014
perror("klogctl");
1015
}
1016
#endif
1017
1018
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1019
if(sd < 0){
1020
perror("socket");
1021
exitcode = EXIT_FAILURE;
1022
#ifdef __linux__
1023
if(restore_loglevel){
1024
ret = klogctl(7, NULL, 0);
1025
if(ret == -1){
1026
perror("klogctl");
1027
}
1028
}
1029
#endif
1030
goto end;
1031
}
1032
strcpy(network.ifr_name, interface);
1033
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1034
if(ret == -1){
1035
perror("ioctl SIOCGIFFLAGS");
1036
#ifdef __linux__
1037
if(restore_loglevel){
1038
ret = klogctl(7, NULL, 0);
1039
if(ret == -1){
1040
perror("klogctl");
1041
}
1042
}
1043
#endif
1044
exitcode = EXIT_FAILURE;
1045
goto end;
1046
}
1047
if((network.ifr_flags & IFF_UP) == 0){
1048
network.ifr_flags |= IFF_UP;
1049
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1050
if(ret == -1){
1051
perror("ioctl SIOCSIFFLAGS");
1052
exitcode = EXIT_FAILURE;
1053
#ifdef __linux__
1054
if(restore_loglevel){
1055
ret = klogctl(7, NULL, 0);
1056
if(ret == -1){
1057
perror("klogctl");
895
1058
}
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
1059
}
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;
1060
#endif
918
1061
goto end;
919
1062
}
920
1063
}
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);
1064
/* sleep checking until interface is running */
1065
for(int i=0; i < delay * 4; i++){
931
1066
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
1067
if(ret == -1){
933
1068
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));
1069
} else if(network.ifr_flags & IFF_RUNNING){
1070
break;
1071
}
1072
struct timespec sleeptime = { .tv_nsec = 250000000 };
1073
ret = nanosleep(&sleeptime, NULL);
1074
if(ret == -1 and errno != EINTR){
1075
perror("nanosleep");
1076
}
1077
}
1078
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1079
if(ret == -1){
1080
perror("close");
1081
}
1082
#ifdef __linux__
1083
if(restore_loglevel){
1084
/* Restores kernel loglevel to default */
1085
ret = klogctl(7, NULL, 0);
947
1086
if(ret == -1){
948
perror("close");
1087
perror("klogctl");
949
1088
}
950
1089
}
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
1090
#endif
1091
}
1092
1093
uid = getuid();
1094
gid = getgid();
1095
1096
errno = 0;
1097
setgid(gid);
1098
if(ret == -1){
1099
perror("setgid");
1100
}
1101
1102
ret = setuid(uid);
1103
if(ret == -1){
1104
perror("setuid");
1105
}
1106
1107
ret = init_gnutls_global(pubkey, seckey);
1108
if(ret == -1){
1109
fprintf(stderr, "init_gnutls_global failed\n");
1110
exitcode = EXIT_FAILURE;
1111
goto end;
1112
} else {
1113
gnutls_initialized = true;
1114
}
1115
1116
if(mkdtemp(tempdir) == NULL){
1117
perror("mkdtemp");
1118
goto end;
1119
}
1120
tempdir_created = true;
1121
1122
if(not init_gpgme(pubkey, seckey, tempdir)){
1123
fprintf(stderr, "init_gpgme failed\n");
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
} else {
1127
gpgme_initialized = true;
1128
}
1129
1130
if(interface[0] != '\0'){
988
1131
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
1132
if(if_index == 0){
990
1133
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
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
}
1137
}
1138
1139
if(connect_to != NULL){
1140
/* Connect directly, do not use Zeroconf */
1141
/* (Mainly meant for debugging) */
1142
char *address = strrchr(connect_to, ':');
1143
if(address == NULL){
1144
fprintf(stderr, "No colon in address\n");
1145
exitcode = EXIT_FAILURE;
1146
goto end;
1147
}
1148
uint16_t port;
1149
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1150
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1151
or address[numchars+1] != '\0'){
1152
fprintf(stderr, "Bad port number\n");
1153
exitcode = EXIT_FAILURE;
1154
goto end;
1155
}
1156
port = (uint16_t)tmpmax;
1157
*address = '\0';
1158
address = connect_to;
1159
/* Colon in address indicates IPv6 */
1160
int af;
1161
if(strchr(address, ':') != NULL){
1162
af = AF_INET6;
1163
} else {
1164
af = AF_INET;
1165
}
1166
ret = start_mandos_communication(address, port, if_index,
1167
af);
1168
if(ret < 0){
1169
exitcode = EXIT_FAILURE;
1170
} else {
1171
exitcode = EXIT_SUCCESS;
1172
}
1173
goto end;
1174
}
1175
1176
if(not debug){
1177
avahi_set_log_function(empty_log);
1178
}
1179
1180
/* Initialize the pseudo-RNG for Avahi */
1181
srand((unsigned int) time(NULL));
1182
1183
/* Allocate main Avahi loop object */
1184
mc.simple_poll = avahi_simple_poll_new();
1185
if(mc.simple_poll == NULL){
1186
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1187
exitcode = EXIT_FAILURE;
1188
goto end;
1189
}
1190
1191
{
1192
AvahiServerConfig config;
1193
/* Do not publish any local Zeroconf records */
1194
avahi_server_config_init(&config);
1195
config.publish_hinfo = 0;
1196
config.publish_addresses = 0;
1197
config.publish_workstation = 0;
1198
config.publish_domain = 0;
1199
1200
/* Allocate a new server */
1201
mc.server = avahi_server_new(avahi_simple_poll_get
1202
(mc.simple_poll), &config, NULL,
1203
NULL, &error);
1204
1205
/* Free the Avahi configuration data */
1206
avahi_server_config_free(&config);
1207
}
1208
1209
/* Check if creating the Avahi server object succeeded */
1210
if(mc.server == NULL){
1211
fprintf(stderr, "Failed to create Avahi server: %s\n",
1212
avahi_strerror(error));
1213
exitcode = EXIT_FAILURE;
1214
goto end;
1215
}
1216
1217
/* Create the Avahi service browser */
1218
sb = avahi_s_service_browser_new(mc.server, if_index,
1219
AVAHI_PROTO_INET6, "_mandos._tcp",
1220
NULL, 0, browse_callback, NULL);
1221
if(sb == NULL){
1222
fprintf(stderr, "Failed to create service browser: %s\n",
1223
avahi_strerror(avahi_server_errno(mc.server)));
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
1228
sigemptyset(&sigterm_action.sa_mask);
1229
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1230
if(ret == -1){
1231
perror("sigaddset");
1232
exitcode = EXIT_FAILURE;
1233
goto end;
1234
}
1235
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1236
if(ret == -1){
1237
perror("sigaction");
1238
exitcode = EXIT_FAILURE;
1239
goto end;
1240
}
1241
1242
/* Run the main loop */
1243
1244
if(debug){
1245
fprintf(stderr, "Starting Avahi loop search\n");
1246
}
1247
1248
avahi_simple_poll_loop(mc.simple_poll);
1249
1083
1250
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){
1251
1252
if(debug){
1253
fprintf(stderr, "%s exiting\n", argv[0]);
1254
}
1255
1256
/* Cleanup things */
1257
if(sb != NULL)
1258
avahi_s_service_browser_free(sb);
1259
1260
if(mc.server != NULL)
1261
avahi_server_free(mc.server);
1262
1263
if(mc.simple_poll != NULL)
1264
avahi_simple_poll_free(mc.simple_poll);
1265
1266
if(gnutls_initialized){
1267
gnutls_certificate_free_credentials(mc.cred);
1268
gnutls_global_deinit();
1269
gnutls_dh_params_deinit(mc.dh_params);
1270
}
1271
1272
if(gpgme_initialized){
1273
gpgme_release(mc.ctx);
1274
}
1275
1276
/* Removes the temp directory used by GPGME */
1277
if(tempdir_created){
1278
DIR *d;
1279
struct dirent *direntry;
1280
d = opendir(tempdir);
1281
if(d == NULL){
1282
if(errno != ENOENT){
1115
1283
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;
1284
}
1285
} else {
1286
while(true){
1287
direntry = readdir(d);
1288
if(direntry == NULL){
1289
break;
1290
}
1291
/* Skip "." and ".." */
1292
if(direntry->d_name[0] == '.'
1293
and (direntry->d_name[1] == '\0'
1294
or (direntry->d_name[1] == '.'
1295
and direntry->d_name[2] == '\0'))){
1296
continue;
1297
}
1298
char *fullname = NULL;
1299
ret = asprintf(&fullname, "%s/%s", tempdir,
1300
direntry->d_name);
1301
if(ret < 0){
1302
perror("asprintf");
1303
continue;
1304
}
1305
ret = remove(fullname);
1306
if(ret == -1){
1307
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1308
strerror(errno));
1309
}
1310
free(fullname);
1311
}
1312
closedir(d);
1313
}
1314
ret = rmdir(tempdir);
1315
if(ret == -1 and errno != ENOENT){
1316
perror("rmdir");
1317
}
1318
}
1319
1320
return exitcode;
1147
1321
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0