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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:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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 = "password-request 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){
318
perror("pgpme_data_seek");
324
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
325
perror("gpgme_data_seek");
319
326
plaintext_length = -1;
320
327
goto decrypt_end;
321
328
}
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();
463
gnutls_dh_params_deinit(mc.dh_params);
454
464
return -1;
455
465
}
456
466
457
static int init_gnutls_session(mandos_context *mc,
458
gnutls_session_t *session){
467
static int init_gnutls_session(gnutls_session_t *session){
459
468
int ret;
460
469
/* GnuTLS session creation */
461
470
ret = gnutls_init(session, GNUTLS_SERVER);
462
if (ret != GNUTLS_E_SUCCESS){
471
if(ret != GNUTLS_E_SUCCESS){
463
472
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
464
473
safer_gnutls_strerror(ret));
465
474
}
466
475
467
476
{
468
477
const char *err;
469
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
470
if (ret != GNUTLS_E_SUCCESS) {
478
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
479
if(ret != GNUTLS_E_SUCCESS){
471
480
fprintf(stderr, "Syntax error at: %s\n", err);
472
481
fprintf(stderr, "GnuTLS error: %s\n",
473
482
safer_gnutls_strerror(ret));
474
gnutls_deinit (*session);
483
gnutls_deinit(*session);
475
484
return -1;
476
485
}
477
486
}
478
487
479
488
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
480
mc->cred);
481
if (ret != GNUTLS_E_SUCCESS) {
489
mc.cred);
490
if(ret != GNUTLS_E_SUCCESS){
482
491
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
483
492
safer_gnutls_strerror(ret));
484
gnutls_deinit (*session);
493
gnutls_deinit(*session);
485
494
return -1;
486
495
}
487
496
488
497
/* ignore client certificate if any. */
489
gnutls_certificate_server_set_request (*session,
490
GNUTLS_CERT_IGNORE);
498
gnutls_certificate_server_set_request(*session,
499
GNUTLS_CERT_IGNORE);
491
500
492
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
493
502
494
503
return 0;
495
504
}
501
510
/* Called when a Mandos server is found */
502
511
static int start_mandos_communication(const char *ip, uint16_t port,
503
512
AvahiIfIndex if_index,
504
mandos_context *mc){
513
int af){
505
514
int ret, tcp_sd;
506
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;
507
520
char *buffer = NULL;
508
521
char *decrypted_buffer;
509
522
size_t buffer_length = 0;
511
524
ssize_t decrypted_buffer_size;
512
525
size_t written;
513
526
int retval = 0;
514
char interface[IF_NAMESIZE];
515
527
gnutls_session_t session;
516
517
ret = init_gnutls_session (mc, &session);
518
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){
519
544
return -1;
520
545
}
521
546
522
547
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
548
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
524
549
"\n", ip, port);
525
550
}
526
551
527
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
528
if(tcp_sd < 0) {
552
tcp_sd = socket(pf, SOCK_STREAM, 0);
553
if(tcp_sd < 0){
529
554
perror("socket");
530
555
return -1;
531
556
}
532
557
533
if(debug){
534
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
perror("if_indextoname");
536
return -1;
537
}
538
fprintf(stderr, "Binding to interface %s\n", interface);
539
}
540
541
558
memset(&to, 0, sizeof(to));
542
to.in6.sin6_family = AF_INET6;
543
/* It would be nice to have a way to detect if we were passed an
544
IPv4 address here. Now we assume an IPv6 address. */
545
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
546
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 ){
547
567
perror("inet_pton");
548
568
return -1;
549
569
}
551
571
fprintf(stderr, "Bad address: %s\n", ip);
552
572
return -1;
553
573
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
555
556
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
}
557
595
558
596
if(debug){
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
561
char addrstr[INET6_ADDRSTRLEN] = "";
562
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
563
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){
564
620
perror("inet_ntop");
565
621
} else {
566
622
if(strcmp(addrstr, ip) != 0){
569
625
}
570
626
}
571
627
572
ret = connect(tcp_sd, &to.in, sizeof(to));
573
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){
574
634
perror("connect");
575
635
return -1;
576
636
}
577
637
578
638
const char *out = mandos_protocol_version;
579
639
written = 0;
580
while (true){
640
while(true){
581
641
size_t out_size = strlen(out);
582
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
643
out_size - written));
584
if (ret == -1){
644
if(ret == -1){
585
645
perror("write");
586
646
retval = -1;
587
647
goto mandos_end;
590
650
if(written < out_size){
591
651
continue;
592
652
} else {
593
if (out == mandos_protocol_version){
653
if(out == mandos_protocol_version){
594
654
written = 0;
595
655
out = "\r\n";
596
656
} else {
603
663
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
664
}
605
665
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
666
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
607
667
608
668
do{
609
ret = gnutls_handshake (session);
669
ret = gnutls_handshake(session);
610
670
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
611
671
612
if (ret != GNUTLS_E_SUCCESS){
672
if(ret != GNUTLS_E_SUCCESS){
613
673
if(debug){
614
674
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
615
gnutls_perror (ret);
675
gnutls_perror(ret);
616
676
}
617
677
retval = -1;
618
678
goto mandos_end;
621
681
/* Read OpenPGP packet that contains the wanted password */
622
682
623
683
if(debug){
624
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
625
685
ip);
626
686
}
627
687
628
688
while(true){
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
buffer_capacity = incbuffer(&buffer, buffer_length,
630
690
buffer_capacity);
631
if (buffer_capacity == 0){
632
perror("adjustbuffer");
691
if(buffer_capacity == 0){
692
perror("incbuffer");
633
693
retval = -1;
634
694
goto mandos_end;
635
695
}
636
696
637
ret = gnutls_record_recv(session, buffer+buffer_length,
638
BUFFER_SIZE);
639
if (ret == 0){
697
sret = gnutls_record_recv(session, buffer+buffer_length,
698
BUFFER_SIZE);
699
if(sret == 0){
640
700
break;
641
701
}
642
if (ret < 0){
643
switch(ret){
702
if(sret < 0){
703
switch(sret){
644
704
case GNUTLS_E_INTERRUPTED:
645
705
case GNUTLS_E_AGAIN:
646
706
break;
647
707
case GNUTLS_E_REHANDSHAKE:
648
708
do{
649
ret = gnutls_handshake (session);
709
ret = gnutls_handshake(session);
650
710
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
651
if (ret < 0){
711
if(ret < 0){
652
712
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
653
gnutls_perror (ret);
713
gnutls_perror(ret);
654
714
retval = -1;
655
715
goto mandos_end;
656
716
}
659
719
fprintf(stderr, "Unknown error while reading data from"
660
720
" encrypted session with Mandos server\n");
661
721
retval = -1;
662
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
gnutls_bye(session, GNUTLS_SHUT_RDWR);
663
723
goto mandos_end;
664
724
}
665
725
} else {
666
buffer_length += (size_t) ret;
726
buffer_length += (size_t) sret;
667
727
}
668
728
}
669
729
671
731
fprintf(stderr, "Closing TLS session\n");
672
732
}
673
733
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
gnutls_bye(session, GNUTLS_SHUT_RDWR);
675
735
676
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
736
if(buffer_length > 0){
737
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
738
buffer_length,
679
739
&decrypted_buffer);
680
if (decrypted_buffer_size >= 0){
740
if(decrypted_buffer_size >= 0){
681
741
written = 0;
682
742
while(written < (size_t) decrypted_buffer_size){
683
ret = (int)fwrite (decrypted_buffer + written, 1,
684
(size_t)decrypted_buffer_size - written,
685
stdout);
743
ret = (int)fwrite(decrypted_buffer + written, 1,
744
(size_t)decrypted_buffer_size - written,
745
stdout);
686
746
if(ret == 0 and ferror(stdout)){
687
747
if(debug){
688
748
fprintf(stderr, "Error writing encrypted data: %s\n",
705
765
706
766
mandos_end:
707
767
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
768
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
709
769
if(ret == -1){
710
770
perror("close");
711
771
}
712
gnutls_deinit (session);
772
gnutls_deinit(session);
713
773
return retval;
714
774
}
715
775
716
776
static void resolve_callback(AvahiSServiceResolver *r,
717
777
AvahiIfIndex interface,
718
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
AvahiProtocol proto,
719
779
AvahiResolverEvent event,
720
780
const char *name,
721
781
const char *type,
726
786
AVAHI_GCC_UNUSED AvahiStringList *txt,
727
787
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
788
flags,
729
void* userdata) {
730
mandos_context *mc = userdata;
789
__attribute__((unused)) void* userdata){
731
790
assert(r);
732
791
733
792
/* Called whenever a service has been resolved successfully or
734
793
timed out */
735
794
736
switch (event) {
795
switch(event){
737
796
default:
738
797
case AVAHI_RESOLVER_FAILURE:
739
798
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
740
799
" of type '%s' in domain '%s': %s\n", name, type, domain,
741
avahi_strerror(avahi_server_errno(mc->server)));
800
avahi_strerror(avahi_server_errno(mc.server)));
742
801
break;
743
802
744
803
case AVAHI_RESOLVER_FOUND:
747
806
avahi_address_snprint(ip, sizeof(ip), address);
748
807
if(debug){
749
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
752
811
}
753
int ret = start_mandos_communication(ip, port, interface, mc);
754
if (ret == 0){
755
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);
756
816
}
757
817
}
758
818
}
759
819
avahi_s_service_resolver_free(r);
760
820
}
761
821
762
static void browse_callback( AvahiSServiceBrowser *b,
763
AvahiIfIndex interface,
764
AvahiProtocol protocol,
765
AvahiBrowserEvent event,
766
const char *name,
767
const char *type,
768
const char *domain,
769
AVAHI_GCC_UNUSED AvahiLookupResultFlags
770
flags,
771
void* userdata) {
772
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){
773
832
assert(b);
774
833
775
834
/* Called whenever a new services becomes available on the LAN or
776
835
is removed from the LAN */
777
836
778
switch (event) {
837
switch(event){
779
838
default:
780
839
case AVAHI_BROWSER_FAILURE:
781
840
782
841
fprintf(stderr, "(Avahi browser) %s\n",
783
avahi_strerror(avahi_server_errno(mc->server)));
784
avahi_simple_poll_quit(mc->simple_poll);
842
avahi_strerror(avahi_server_errno(mc.server)));
843
avahi_simple_poll_quit(mc.simple_poll);
785
844
return;
786
845
787
846
case AVAHI_BROWSER_NEW:
790
849
the callback function is called the Avahi server will free the
791
850
resolver for us. */
792
851
793
if (!(avahi_s_service_resolver_new(mc->server, interface,
852
if(!(avahi_s_service_resolver_new(mc.server, interface,
794
853
protocol, name, type, domain,
795
854
AVAHI_PROTO_INET6, 0,
796
resolve_callback, mc)))
855
resolve_callback, NULL)))
797
856
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
798
name, avahi_strerror(avahi_server_errno(mc->server)));
857
name, avahi_strerror(avahi_server_errno(mc.server)));
799
858
break;
800
859
801
860
case AVAHI_BROWSER_REMOVE:
810
869
}
811
870
}
812
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
813
878
int main(int argc, char *argv[]){
814
AvahiSServiceBrowser *sb = NULL;
815
int error;
816
int ret;
817
int exitcode = EXIT_SUCCESS;
818
const char *interface = "eth0";
819
struct ifreq network;
820
int sd;
821
uid_t uid;
822
gid_t gid;
823
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
829
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
834
835
{
836
struct argp_option options[] = {
837
{ .name = "debug", .key = 128,
838
.doc = "Debug mode", .group = 3 },
839
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
842
.group = 1 },
843
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
847
.group = 1 },
848
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
851
.group = 1 },
852
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
855
.group = 2 },
856
{ .name = "dh-bits", .key = 129,
857
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
860
.group = 2 },
861
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
865
{ .name = NULL }
866
};
867
868
error_t parse_opt (int key, char *arg,
869
struct argp_state *state) {
870
/* Get the INPUT argument from `argp_parse', which we know is
871
a pointer to our plugin list pointer. */
872
switch (key) {
873
case 128: /* --debug */
874
debug = true;
875
break;
876
case 'c': /* --connect */
877
connect_to = arg;
878
break;
879
case 'i': /* --interface */
880
interface = arg;
881
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
889
errno = 0;
890
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
if (errno){
892
perror("strtol");
893
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");
894
1058
}
895
break;
896
case 130: /* --priority */
897
mc.priority = arg;
898
break;
899
case ARGP_KEY_ARG:
900
argp_usage (state);
901
case ARGP_KEY_END:
902
break;
903
default:
904
return ARGP_ERR_UNKNOWN;
905
1059
}
906
return 0;
907
}
908
909
struct argp argp = { .options = options, .parser = parse_opt,
910
.args_doc = "",
911
.doc = "Mandos client -- Get and decrypt"
912
" passwords from a Mandos server" };
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
915
fprintf(stderr, "Unknown error while parsing arguments\n");
916
exitcode = EXIT_FAILURE;
1060
#endif
917
1061
goto end;
918
1062
}
919
1063
}
920
921
/* If the interface is down, bring it up */
922
{
923
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
924
if(sd < 0) {
925
perror("socket");
926
exitcode = EXIT_FAILURE;
927
goto end;
928
}
929
strcpy(network.ifr_name, interface);
1064
/* sleep checking until interface is running */
1065
for(int i=0; i < delay * 4; i++){
930
1066
ret = ioctl(sd, SIOCGIFFLAGS, &network);
931
1067
if(ret == -1){
932
1068
perror("ioctl SIOCGIFFLAGS");
933
exitcode = EXIT_FAILURE;
934
goto end;
935
}
936
if((network.ifr_flags & IFF_UP) == 0){
937
network.ifr_flags |= IFF_UP;
938
ret = ioctl(sd, SIOCSIFFLAGS, &network);
939
if(ret == -1){
940
perror("ioctl SIOCSIFFLAGS");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
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);
946
1086
if(ret == -1){
947
perror("close");
1087
perror("klogctl");
948
1088
}
949
1089
}
950
951
uid = getuid();
952
gid = getgid();
953
954
ret = setuid(uid);
955
if (ret == -1){
956
perror("setuid");
957
}
958
959
setgid(gid);
960
if (ret == -1){
961
perror("setgid");
962
}
963
964
ret = init_gnutls_global(&mc, pubkey, seckey);
965
if (ret == -1){
966
fprintf(stderr, "init_gnutls_global failed\n");
967
exitcode = EXIT_FAILURE;
968
goto end;
969
} else {
970
gnutls_initalized = true;
971
}
972
973
if(mkdtemp(tempdir) == NULL){
974
perror("mkdtemp");
975
tempdir[0] = '\0';
976
goto end;
977
}
978
979
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
980
fprintf(stderr, "pgpme_initalized failed\n");
981
exitcode = EXIT_FAILURE;
982
goto end;
983
} else {
984
pgpme_initalized = true;
985
}
986
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'){
987
1131
if_index = (AvahiIfIndex) if_nametoindex(interface);
988
1132
if(if_index == 0){
989
1133
fprintf(stderr, "No such interface: \"%s\"\n", interface);
990
exit(EXIT_FAILURE);
991
}
992
993
if(connect_to != NULL){
994
/* Connect directly, do not use Zeroconf */
995
/* (Mainly meant for debugging) */
996
char *address = strrchr(connect_to, ':');
997
if(address == NULL){
998
fprintf(stderr, "No colon in address\n");
999
exitcode = EXIT_FAILURE;
1000
goto end;
1001
}
1002
errno = 0;
1003
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1004
if(errno){
1005
perror("Bad port number");
1006
exitcode = EXIT_FAILURE;
1007
goto end;
1008
}
1009
*address = '\0';
1010
address = connect_to;
1011
ret = start_mandos_communication(address, port, if_index, &mc);
1012
if(ret < 0){
1013
exitcode = EXIT_FAILURE;
1014
} else {
1015
exitcode = EXIT_SUCCESS;
1016
}
1017
goto end;
1018
}
1019
1020
if (not debug){
1021
avahi_set_log_function(empty_log);
1022
}
1023
1024
/* Initialize the pseudo-RNG for Avahi */
1025
srand((unsigned int) time(NULL));
1026
1027
/* Allocate main Avahi loop object */
1028
mc.simple_poll = avahi_simple_poll_new();
1029
if (mc.simple_poll == NULL) {
1030
fprintf(stderr, "Avahi: Failed to create simple poll"
1031
" object.\n");
1032
exitcode = EXIT_FAILURE;
1033
goto end;
1034
}
1035
1036
{
1037
AvahiServerConfig config;
1038
/* Do not publish any local Zeroconf records */
1039
avahi_server_config_init(&config);
1040
config.publish_hinfo = 0;
1041
config.publish_addresses = 0;
1042
config.publish_workstation = 0;
1043
config.publish_domain = 0;
1044
1045
/* Allocate a new server */
1046
mc.server = avahi_server_new(avahi_simple_poll_get
1047
(mc.simple_poll), &config, NULL,
1048
NULL, &error);
1049
1050
/* Free the Avahi configuration data */
1051
avahi_server_config_free(&config);
1052
}
1053
1054
/* Check if creating the Avahi server object succeeded */
1055
if (mc.server == NULL) {
1056
fprintf(stderr, "Failed to create Avahi server: %s\n",
1057
avahi_strerror(error));
1058
exitcode = EXIT_FAILURE;
1059
goto end;
1060
}
1061
1062
/* Create the Avahi service browser */
1063
sb = avahi_s_service_browser_new(mc.server, if_index,
1064
AVAHI_PROTO_INET6,
1065
"_mandos._tcp", NULL, 0,
1066
browse_callback, &mc);
1067
if (sb == NULL) {
1068
fprintf(stderr, "Failed to create service browser: %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
1070
exitcode = EXIT_FAILURE;
1071
goto end;
1072
}
1073
1074
/* Run the main loop */
1075
1076
if (debug){
1077
fprintf(stderr, "Starting Avahi loop search\n");
1078
}
1079
1080
avahi_simple_poll_loop(mc.simple_poll);
1081
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
1082
1250
end:
1083
1084
if (debug){
1085
fprintf(stderr, "%s exiting\n", argv[0]);
1086
}
1087
1088
/* Cleanup things */
1089
if (sb != NULL)
1090
avahi_s_service_browser_free(sb);
1091
1092
if (mc.server != NULL)
1093
avahi_server_free(mc.server);
1094
1095
if (mc.simple_poll != NULL)
1096
avahi_simple_poll_free(mc.simple_poll);
1097
1098
if (gnutls_initalized){
1099
gnutls_certificate_free_credentials(mc.cred);
1100
gnutls_global_deinit ();
1101
}
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
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){
1113
1283
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
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;
1144
1321
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0