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- Committer: Teddy Hogeborn
- Date: 2009-02-09 02:01:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20090209020113-726hq380zvp8zt97
Four new interrelated features:
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
- 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
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
74
81
75
82
/* Avahi */
76
83
/* All Avahi types, constants and functions
89
96
gnutls_*
90
97
init_gnutls_session(),
91
98
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
93
101
GNUTLS_OPENPGP_FMT_BASE64 */
94
102
95
103
/* GPGME */
101
109
102
110
#define BUFFER_SIZE 256
103
111
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
112
#define PATHDIR "/conf/conf.d/mandos"
109
113
#define SECKEY "seckey.txt"
110
#define PUBKEY "pupkey.txt"
114
#define PUBKEY "pubkey.txt"
111
115
112
116
bool debug = false;
113
117
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "password-request 1.0";
118
const char *argp_program_version = "mandos-client " VERSION;
115
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
120
117
121
/* Used for passing in values through the Avahi callback functions */
132
136
*/
133
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
134
138
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
141
if(buffer == NULL){
138
142
return 0;
139
143
}
140
144
buffer_capacity += BUFFER_SIZE;
150
154
int ret;
151
155
gpgme_error_t rc;
152
156
gpgme_engine_info_t engine_info;
153
157
154
158
155
159
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
160
* Helper function to insert pub and seckey to the engine keyring.
157
161
*/
158
162
bool import_key(const char *filename){
159
163
int fd;
160
164
gpgme_data_t pgp_data;
161
165
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
167
if(fd == -1){
164
168
perror("open");
165
169
return false;
166
170
}
167
171
168
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
173
if(rc != GPG_ERR_NO_ERROR){
170
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
175
gpgme_strsource(rc), gpgme_strerror(rc));
172
176
return false;
173
177
}
174
178
175
179
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
180
if(rc != GPG_ERR_NO_ERROR){
177
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
182
gpgme_strsource(rc), gpgme_strerror(rc));
179
183
return false;
180
184
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
187
if(ret == -1){
184
188
perror("close");
185
189
}
187
191
return true;
188
192
}
189
193
190
if (debug){
194
if(debug){
191
195
fprintf(stderr, "Initialize gpgme\n");
192
196
}
193
197
194
198
/* Init GPGME */
195
199
gpgme_check_version(NULL);
196
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
201
if(rc != GPG_ERR_NO_ERROR){
198
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
203
gpgme_strsource(rc), gpgme_strerror(rc));
200
204
return false;
201
205
}
202
206
203
207
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
206
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
211
gpgme_strsource(rc), gpgme_strerror(rc));
208
212
return false;
219
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
224
return false;
221
225
}
222
226
223
227
/* Create new GPGME "context" */
224
228
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
229
if(rc != GPG_ERR_NO_ERROR){
226
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
231
gpgme_strsource(rc), gpgme_strerror(rc));
228
232
return false;
229
233
}
230
234
231
if (not import_key(pubkey) or not import_key(seckey)){
235
if(not import_key(pubkey) or not import_key(seckey)){
232
236
return false;
233
237
}
234
238
239
243
* Decrypt OpenPGP data.
240
244
* Returns -1 on error
241
245
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
246
250
gpgme_data_t dh_crypto, dh_plain;
247
251
gpgme_error_t rc;
248
252
ssize_t ret;
249
253
size_t plaintext_capacity = 0;
250
254
ssize_t plaintext_length = 0;
251
255
252
if (debug){
256
if(debug){
253
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
258
}
255
259
256
260
/* Create new GPGME data buffer from memory cryptotext */
257
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
262
0);
259
if (rc != GPG_ERR_NO_ERROR){
263
if(rc != GPG_ERR_NO_ERROR){
260
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
265
gpgme_strsource(rc), gpgme_strerror(rc));
262
266
return -1;
264
268
265
269
/* Create new empty GPGME data buffer for the plaintext */
266
270
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
268
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
273
gpgme_strsource(rc), gpgme_strerror(rc));
270
274
gpgme_data_release(dh_crypto);
274
278
/* Decrypt data from the cryptotext data buffer to the plaintext
275
279
data buffer */
276
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
281
if(rc != GPG_ERR_NO_ERROR){
278
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
283
gpgme_strsource(rc), gpgme_strerror(rc));
280
284
plaintext_length = -1;
281
if (debug){
285
if(debug){
282
286
gpgme_decrypt_result_t result;
283
287
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
288
if(result == NULL){
285
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
290
} else {
287
291
fprintf(stderr, "Unsupported algorithm: %s\n",
314
318
}
315
319
316
320
/* 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");
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
319
323
plaintext_length = -1;
320
324
goto decrypt_end;
321
325
}
325
329
plaintext_capacity = adjustbuffer(plaintext,
326
330
(size_t)plaintext_length,
327
331
plaintext_capacity);
328
if (plaintext_capacity == 0){
332
if(plaintext_capacity == 0){
329
333
perror("adjustbuffer");
330
334
plaintext_length = -1;
331
335
goto decrypt_end;
334
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
339
BUFFER_SIZE);
336
340
/* Print the data, if any */
337
if (ret == 0){
341
if(ret == 0){
338
342
/* EOF */
339
343
break;
340
344
}
364
368
return plaintext_length;
365
369
}
366
370
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
370
375
ret = "(unknown)";
371
376
return ret;
372
377
}
387
392
}
388
393
389
394
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
393
398
return -1;
394
399
}
395
400
396
if (debug){
401
if(debug){
397
402
/* "Use a log level over 10 to enable all debugging options."
398
403
* - GnuTLS manual
399
404
*/
403
408
404
409
/* OpenPGP credentials */
405
410
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 ();
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
from
414
-Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
411
418
return -1;
412
419
}
413
420
420
427
ret = gnutls_certificate_set_openpgp_key_file
421
428
(mc->cred, pubkeyfilename, seckeyfilename,
422
429
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
430
if(ret != GNUTLS_E_SUCCESS){
424
431
fprintf(stderr,
425
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
431
438
432
439
/* GnuTLS server initialization */
433
440
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));
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
437
444
goto globalfail;
438
445
}
439
446
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));
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
443
450
goto globalfail;
444
451
}
445
452
451
458
452
459
gnutls_certificate_free_credentials(mc->cred);
453
460
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
454
462
return -1;
455
463
}
456
464
459
467
int ret;
460
468
/* GnuTLS session creation */
461
469
ret = gnutls_init(session, GNUTLS_SERVER);
462
if (ret != GNUTLS_E_SUCCESS){
470
if(ret != GNUTLS_E_SUCCESS){
463
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
464
472
safer_gnutls_strerror(ret));
465
473
}
467
475
{
468
476
const char *err;
469
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
470
if (ret != GNUTLS_E_SUCCESS) {
478
if(ret != GNUTLS_E_SUCCESS){
471
479
fprintf(stderr, "Syntax error at: %s\n", err);
472
480
fprintf(stderr, "GnuTLS error: %s\n",
473
481
safer_gnutls_strerror(ret));
474
gnutls_deinit (*session);
482
gnutls_deinit(*session);
475
483
return -1;
476
484
}
477
485
}
478
486
479
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
480
488
mc->cred);
481
if (ret != GNUTLS_E_SUCCESS) {
489
if(ret != GNUTLS_E_SUCCESS){
482
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
483
491
safer_gnutls_strerror(ret));
484
gnutls_deinit (*session);
492
gnutls_deinit(*session);
485
493
return -1;
486
494
}
487
495
488
496
/* ignore client certificate if any. */
489
gnutls_certificate_server_set_request (*session,
490
GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
491
499
492
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
493
501
494
502
return 0;
495
503
}
501
509
/* Called when a Mandos server is found */
502
510
static int start_mandos_communication(const char *ip, uint16_t port,
503
511
AvahiIfIndex if_index,
504
mandos_context *mc){
512
mandos_context *mc, int af){
505
513
int ret, tcp_sd;
506
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
514
ssize_t sret;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
507
519
char *buffer = NULL;
508
520
char *decrypted_buffer;
509
521
size_t buffer_length = 0;
511
523
ssize_t decrypted_buffer_size;
512
524
size_t written;
513
525
int retval = 0;
514
char interface[IF_NAMESIZE];
515
526
gnutls_session_t session;
516
517
ret = init_gnutls_session (mc, &session);
518
if (ret != 0){
527
int pf; /* Protocol family */
528
529
switch(af){
530
case AF_INET6:
531
pf = PF_INET6;
532
break;
533
case AF_INET:
534
pf = PF_INET;
535
break;
536
default:
537
fprintf(stderr, "Bad address family: %d\n", af);
538
return -1;
539
}
540
541
ret = init_gnutls_session(mc, &session);
542
if(ret != 0){
519
543
return -1;
520
544
}
521
545
522
546
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
524
548
"\n", ip, port);
525
549
}
526
550
527
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
528
if(tcp_sd < 0) {
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
529
553
perror("socket");
530
554
return -1;
531
555
}
532
556
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
557
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 ){
558
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
560
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
} else { /* IPv4 */
562
to.in.sin_family = (sa_family_t)af;
563
ret = inet_pton(af, ip, &to.in.sin_addr);
564
}
565
if(ret < 0 ){
547
566
perror("inet_pton");
548
567
return -1;
549
568
}
551
570
fprintf(stderr, "Bad address: %s\n", ip);
552
571
return -1;
553
572
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
555
556
to.in6.sin6_scope_id = (uint32_t)if_index;
573
if(af == AF_INET6){
574
to.in6.sin6_port = htons(port); /* Spurious warnings from
575
-Wconversion and
576
-Wunreachable-code */
577
578
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
579
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
580
-Wunreachable-code*/
581
if(if_index == AVAHI_IF_UNSPEC){
582
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
" without a network interface\n");
584
return -1;
585
}
586
/* Set the network interface number as scope */
587
to.in6.sin6_scope_id = (uint32_t)if_index;
588
}
589
} else {
590
to.in.sin_port = htons(port); /* Spurious warnings from
591
-Wconversion and
592
-Wunreachable-code */
593
}
557
594
558
595
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){
596
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
char interface[IF_NAMESIZE];
598
if(if_indextoname((unsigned int)if_index, interface) == NULL){
599
perror("if_indextoname");
600
} else {
601
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
602
ip, interface, port);
603
}
604
} else {
605
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
606
port);
607
}
608
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
609
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
610
const char *pcret;
611
if(af == AF_INET6){
612
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
613
sizeof(addrstr));
614
} else {
615
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
616
sizeof(addrstr));
617
}
618
if(pcret == NULL){
564
619
perror("inet_ntop");
565
620
} else {
566
621
if(strcmp(addrstr, ip) != 0){
569
624
}
570
625
}
571
626
572
ret = connect(tcp_sd, &to.in, sizeof(to));
573
if (ret < 0){
627
if(af == AF_INET6){
628
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
} else {
630
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
631
}
632
if(ret < 0){
574
633
perror("connect");
575
634
return -1;
576
635
}
577
636
578
637
const char *out = mandos_protocol_version;
579
638
written = 0;
580
while (true){
639
while(true){
581
640
size_t out_size = strlen(out);
582
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
642
out_size - written));
584
if (ret == -1){
643
if(ret == -1){
585
644
perror("write");
586
645
retval = -1;
587
646
goto mandos_end;
590
649
if(written < out_size){
591
650
continue;
592
651
} else {
593
if (out == mandos_protocol_version){
652
if(out == mandos_protocol_version){
594
653
written = 0;
595
654
out = "\r\n";
596
655
} else {
603
662
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
663
}
605
664
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
607
666
608
667
do{
609
ret = gnutls_handshake (session);
668
ret = gnutls_handshake(session);
610
669
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
611
670
612
if (ret != GNUTLS_E_SUCCESS){
671
if(ret != GNUTLS_E_SUCCESS){
613
672
if(debug){
614
673
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
615
gnutls_perror (ret);
674
gnutls_perror(ret);
616
675
}
617
676
retval = -1;
618
677
goto mandos_end;
621
680
/* Read OpenPGP packet that contains the wanted password */
622
681
623
682
if(debug){
624
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
625
684
ip);
626
685
}
627
686
628
687
while(true){
629
688
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
689
buffer_capacity);
631
if (buffer_capacity == 0){
690
if(buffer_capacity == 0){
632
691
perror("adjustbuffer");
633
692
retval = -1;
634
693
goto mandos_end;
635
694
}
636
695
637
ret = gnutls_record_recv(session, buffer+buffer_length,
638
BUFFER_SIZE);
639
if (ret == 0){
696
sret = gnutls_record_recv(session, buffer+buffer_length,
697
BUFFER_SIZE);
698
if(sret == 0){
640
699
break;
641
700
}
642
if (ret < 0){
643
switch(ret){
701
if(sret < 0){
702
switch(sret){
644
703
case GNUTLS_E_INTERRUPTED:
645
704
case GNUTLS_E_AGAIN:
646
705
break;
647
706
case GNUTLS_E_REHANDSHAKE:
648
707
do{
649
ret = gnutls_handshake (session);
708
ret = gnutls_handshake(session);
650
709
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
651
if (ret < 0){
710
if(ret < 0){
652
711
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
653
gnutls_perror (ret);
712
gnutls_perror(ret);
654
713
retval = -1;
655
714
goto mandos_end;
656
715
}
659
718
fprintf(stderr, "Unknown error while reading data from"
660
719
" encrypted session with Mandos server\n");
661
720
retval = -1;
662
gnutls_bye (session, GNUTLS_SHUT_RDWR);
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
663
722
goto mandos_end;
664
723
}
665
724
} else {
666
buffer_length += (size_t) ret;
725
buffer_length += (size_t) sret;
667
726
}
668
727
}
669
728
671
730
fprintf(stderr, "Closing TLS session\n");
672
731
}
673
732
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
675
734
676
if (buffer_length > 0){
735
if(buffer_length > 0){
677
736
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
678
737
buffer_length,
679
738
&decrypted_buffer);
680
if (decrypted_buffer_size >= 0){
739
if(decrypted_buffer_size >= 0){
681
740
written = 0;
682
741
while(written < (size_t) decrypted_buffer_size){
683
ret = (int)fwrite (decrypted_buffer + written, 1,
684
(size_t)decrypted_buffer_size - written,
685
stdout);
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
686
745
if(ret == 0 and ferror(stdout)){
687
746
if(debug){
688
747
fprintf(stderr, "Error writing encrypted data: %s\n",
705
764
706
765
mandos_end:
707
766
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
709
768
if(ret == -1){
710
769
perror("close");
711
770
}
712
gnutls_deinit (session);
771
gnutls_deinit(session);
713
772
return retval;
714
773
}
715
774
716
775
static void resolve_callback(AvahiSServiceResolver *r,
717
776
AvahiIfIndex interface,
718
AVAHI_GCC_UNUSED AvahiProtocol protocol,
777
AvahiProtocol proto,
719
778
AvahiResolverEvent event,
720
779
const char *name,
721
780
const char *type,
726
785
AVAHI_GCC_UNUSED AvahiStringList *txt,
727
786
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
787
flags,
729
void* userdata) {
788
void* userdata){
730
789
mandos_context *mc = 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'"
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){
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
755
815
avahi_simple_poll_quit(mc->simple_poll);
756
816
}
757
817
}
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) {
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
void* userdata){
772
832
mandos_context *mc = userdata;
773
833
assert(b);
774
834
775
835
/* Called whenever a new services becomes available on the LAN or
776
836
is removed from the LAN */
777
837
778
switch (event) {
838
switch(event){
779
839
default:
780
840
case AVAHI_BROWSER_FAILURE:
781
841
790
850
the callback function is called the Avahi server will free the
791
851
resolver for us. */
792
852
793
if (!(avahi_s_service_resolver_new(mc->server, interface,
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
794
854
protocol, name, type, domain,
795
855
AVAHI_PROTO_INET6, 0,
796
856
resolve_callback, mc)))
811
871
}
812
872
813
873
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);
874
AvahiSServiceBrowser *sb = NULL;
875
int error;
876
int ret;
877
intmax_t tmpmax;
878
int numchars;
879
int exitcode = EXIT_SUCCESS;
880
const char *interface = "eth0";
881
struct ifreq network;
882
int sd;
883
uid_t uid;
884
gid_t gid;
885
char *connect_to = NULL;
886
char tempdir[] = "/tmp/mandosXXXXXX";
887
bool tempdir_created = false;
888
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
889
const char *seckey = PATHDIR "/" SECKEY;
890
const char *pubkey = PATHDIR "/" PUBKEY;
891
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
bool gnutls_initialized = false;
896
bool gpgme_initialized = false;
897
double delay = 2.5;
898
899
{
900
struct argp_option options[] = {
901
{ .name = "debug", .key = 128,
902
.doc = "Debug mode", .group = 3 },
903
{ .name = "connect", .key = 'c',
904
.arg = "ADDRESS:PORT",
905
.doc = "Connect directly to a specific Mandos server",
906
.group = 1 },
907
{ .name = "interface", .key = 'i',
908
.arg = "NAME",
909
.doc = "Network interface that will be used to search for"
910
" Mandos servers",
911
.group = 1 },
912
{ .name = "seckey", .key = 's',
913
.arg = "FILE",
914
.doc = "OpenPGP secret key file base name",
915
.group = 1 },
916
{ .name = "pubkey", .key = 'p',
917
.arg = "FILE",
918
.doc = "OpenPGP public key file base name",
919
.group = 2 },
920
{ .name = "dh-bits", .key = 129,
921
.arg = "BITS",
922
.doc = "Bit length of the prime number used in the"
923
" Diffie-Hellman key exchange",
924
.group = 2 },
925
{ .name = "priority", .key = 130,
926
.arg = "STRING",
927
.doc = "GnuTLS priority string for the TLS handshake",
928
.group = 1 },
929
{ .name = "delay", .key = 131,
930
.arg = "SECONDS",
931
.doc = "Maximum delay to wait for interface startup",
932
.group = 2 },
933
{ .name = NULL }
934
};
935
936
error_t parse_opt(int key, char *arg,
937
struct argp_state *state){
938
switch(key){
939
case 128: /* --debug */
940
debug = true;
941
break;
942
case 'c': /* --connect */
943
connect_to = arg;
944
break;
945
case 'i': /* --interface */
946
interface = arg;
947
break;
948
case 's': /* --seckey */
949
seckey = arg;
950
break;
951
case 'p': /* --pubkey */
952
pubkey = arg;
953
break;
954
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
958
fprintf(stderr, "Bad number of DH bits\n");
959
exit(EXIT_FAILURE);
960
}
961
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
962
break;
963
case 130: /* --priority */
964
mc.priority = arg;
965
break;
966
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad delay\n");
970
exit(EXIT_FAILURE);
971
}
972
break;
973
case ARGP_KEY_ARG:
974
argp_usage(state);
975
case ARGP_KEY_END:
976
break;
977
default:
978
return ARGP_ERR_UNKNOWN;
979
}
980
return 0;
981
}
982
983
struct argp argp = { .options = options, .parser = parse_opt,
984
.args_doc = "",
985
.doc = "Mandos client -- Get and decrypt"
986
" passwords from a Mandos server" };
987
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
988
if(ret == ARGP_ERR_UNKNOWN){
989
fprintf(stderr, "Unknown error while parsing arguments\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
}
993
}
994
995
/* If the interface is down, bring it up */
996
if(interface[0] != '\0'){
997
#ifdef __linux__
998
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
messages to mess up the prompt */
1000
ret = klogctl(8, NULL, 5);
1001
bool restore_loglevel = true;
1002
if(ret == -1){
1003
restore_loglevel = false;
1004
perror("klogctl");
1005
}
1006
#endif
1007
1008
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
if(sd < 0){
1010
perror("socket");
1011
exitcode = EXIT_FAILURE;
1012
#ifdef __linux__
1013
if(restore_loglevel){
1014
ret = klogctl(7, NULL, 0);
1015
if(ret == -1){
1016
perror("klogctl");
1017
}
1018
}
1019
#endif
1020
goto end;
1021
}
1022
strcpy(network.ifr_name, interface);
1023
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1024
if(ret == -1){
1025
perror("ioctl SIOCGIFFLAGS");
1026
#ifdef __linux__
1027
if(restore_loglevel){
1028
ret = klogctl(7, NULL, 0);
1029
if(ret == -1){
1030
perror("klogctl");
1031
}
1032
}
1033
#endif
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
if((network.ifr_flags & IFF_UP) == 0){
1038
network.ifr_flags |= IFF_UP;
1039
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
if(ret == -1){
1041
perror("ioctl SIOCSIFFLAGS");
1042
exitcode = EXIT_FAILURE;
1043
#ifdef __linux__
1044
if(restore_loglevel){
1045
ret = klogctl(7, NULL, 0);
1046
if(ret == -1){
1047
perror("klogctl");
894
1048
}
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
1049
}
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;
917
goto end;
918
}
919
}
920
921
ret = init_gnutls_global(&mc, pubkey, seckey);
922
if (ret == -1){
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
} else {
927
gnutls_initalized = true;
928
}
929
930
if(mkdtemp(tempdir) == NULL){
931
perror("mkdtemp");
932
tempdir[0] = '\0';
933
goto end;
934
}
935
936
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
937
fprintf(stderr, "pgpme_initalized failed\n");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
} else {
941
pgpme_initalized = true;
942
}
943
944
/* If the interface is down, bring it up */
945
{
946
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
947
if(sd < 0) {
948
perror("socket");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
strcpy(network.ifr_name, interface);
1050
#endif
1051
goto end;
1052
}
1053
}
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
953
1056
ret = ioctl(sd, SIOCGIFFLAGS, &network);
954
1057
if(ret == -1){
955
1058
perror("ioctl SIOCGIFFLAGS");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
if((network.ifr_flags & IFF_UP) == 0){
960
network.ifr_flags |= IFF_UP;
961
ret = ioctl(sd, SIOCSIFFLAGS, &network);
962
if(ret == -1){
963
perror("ioctl SIOCSIFFLAGS");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
}
967
}
968
ret = TEMP_FAILURE_RETRY(close(sd));
1059
} else if(network.ifr_flags & IFF_RUNNING){
1060
break;
1061
}
1062
struct timespec sleeptime = { .tv_nsec = 250000000 };
1063
ret = nanosleep(&sleeptime, NULL);
1064
if(ret == -1 and errno != EINTR){
1065
perror("nanosleep");
1066
}
1067
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1071
}
1072
#ifdef __linux__
1073
if(restore_loglevel){
1074
/* Restores kernel loglevel to default */
1075
ret = klogctl(7, NULL, 0);
969
1076
if(ret == -1){
970
perror("close");
1077
perror("klogctl");
971
1078
}
972
1079
}
973
974
uid = getuid();
975
gid = getgid();
976
977
ret = setuid(uid);
978
if (ret == -1){
979
perror("setuid");
980
}
981
982
setgid(gid);
983
if (ret == -1){
984
perror("setgid");
985
}
986
1080
#endif
1081
}
1082
1083
uid = getuid();
1084
gid = getgid();
1085
1086
errno = 0;
1087
setgid(gid);
1088
if(ret == -1){
1089
perror("setgid");
1090
}
1091
1092
ret = setuid(uid);
1093
if(ret == -1){
1094
perror("setuid");
1095
}
1096
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1098
if(ret == -1){
1099
fprintf(stderr, "init_gnutls_global failed\n");
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
} else {
1103
gnutls_initialized = true;
1104
}
1105
1106
if(mkdtemp(tempdir) == NULL){
1107
perror("mkdtemp");
1108
goto end;
1109
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1113
fprintf(stderr, "init_gpgme failed\n");
1114
exitcode = EXIT_FAILURE;
1115
goto end;
1116
} else {
1117
gpgme_initialized = true;
1118
}
1119
1120
if(interface[0] != '\0'){
987
1121
if_index = (AvahiIfIndex) if_nametoindex(interface);
988
1122
if(if_index == 0){
989
1123
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
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
}
1128
1129
if(connect_to != NULL){
1130
/* Connect directly, do not use Zeroconf */
1131
/* (Mainly meant for debugging) */
1132
char *address = strrchr(connect_to, ':');
1133
if(address == NULL){
1134
fprintf(stderr, "No colon in address\n");
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1142
fprintf(stderr, "Bad port number\n");
1143
exitcode = EXIT_FAILURE;
1144
goto end;
1145
}
1146
port = (uint16_t)tmpmax;
1147
*address = '\0';
1148
address = connect_to;
1149
/* Colon in address indicates IPv6 */
1150
int af;
1151
if(strchr(address, ':') != NULL){
1152
af = AF_INET6;
1153
} else {
1154
af = AF_INET;
1155
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1158
if(ret < 0){
1159
exitcode = EXIT_FAILURE;
1160
} else {
1161
exitcode = EXIT_SUCCESS;
1162
}
1163
goto end;
1164
}
1165
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1178
goto end;
1179
}
1180
1181
{
1182
AvahiServerConfig config;
1183
/* Do not publish any local Zeroconf records */
1184
avahi_server_config_init(&config);
1185
config.publish_hinfo = 0;
1186
config.publish_addresses = 0;
1187
config.publish_workstation = 0;
1188
config.publish_domain = 0;
1189
1190
/* Allocate a new server */
1191
mc.server = avahi_server_new(avahi_simple_poll_get
1192
(mc.simple_poll), &config, NULL,
1193
NULL, &error);
1194
1195
/* Free the Avahi configuration data */
1196
avahi_server_config_free(&config);
1197
}
1198
1199
/* Check if creating the Avahi server object succeeded */
1200
if(mc.server == NULL){
1201
fprintf(stderr, "Failed to create Avahi server: %s\n",
1202
avahi_strerror(error));
1203
exitcode = EXIT_FAILURE;
1204
goto end;
1205
}
1206
1207
/* Create the Avahi service browser */
1208
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1211
if(sb == NULL){
1212
fprintf(stderr, "Failed to create service browser: %s\n",
1213
avahi_strerror(avahi_server_errno(mc.server)));
1214
exitcode = EXIT_FAILURE;
1215
goto end;
1216
}
1217
1218
/* Run the main loop */
1219
1220
if(debug){
1221
fprintf(stderr, "Starting Avahi loop search\n");
1222
}
1223
1224
avahi_simple_poll_loop(mc.simple_poll);
1225
1082
1226
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){
1227
1228
if(debug){
1229
fprintf(stderr, "%s exiting\n", argv[0]);
1230
}
1231
1232
/* Cleanup things */
1233
if(sb != NULL)
1234
avahi_s_service_browser_free(sb);
1235
1236
if(mc.server != NULL)
1237
avahi_server_free(mc.server);
1238
1239
if(mc.simple_poll != NULL)
1240
avahi_simple_poll_free(mc.simple_poll);
1241
1242
if(gnutls_initialized){
1243
gnutls_certificate_free_credentials(mc.cred);
1244
gnutls_global_deinit();
1245
gnutls_dh_params_deinit(mc.dh_params);
1246
}
1247
1248
if(gpgme_initialized){
1249
gpgme_release(mc.ctx);
1250
}
1251
1252
/* Removes the temp directory used by GPGME */
1253
if(tempdir_created){
1254
DIR *d;
1255
struct dirent *direntry;
1256
d = opendir(tempdir);
1257
if(d == NULL){
1258
if(errno != ENOENT){
1113
1259
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;
1260
}
1261
} else {
1262
while(true){
1263
direntry = readdir(d);
1264
if(direntry == NULL){
1265
break;
1266
}
1267
/* Skip "." and ".." */
1268
if(direntry->d_name[0] == '.'
1269
and (direntry->d_name[1] == '\0'
1270
or (direntry->d_name[1] == '.'
1271
and direntry->d_name[2] == '\0'))){
1272
continue;
1273
}
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", tempdir,
1276
direntry->d_name);
1277
if(ret < 0){
1278
perror("asprintf");
1279
continue;
1280
}
1281
ret = remove(fullname);
1282
if(ret == -1){
1283
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1284
strerror(errno));
1285
}
1286
free(fullname);
1287
}
1288
closedir(d);
1289
}
1290
ret = rmdir(tempdir);
1291
if(ret == -1 and errno != ENOENT){
1292
perror("rmdir");
1293
}
1294
}
1295
1296
return exitcode;
1144
1297
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0