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- Committer: Teddy Hogeborn
- Date: 2008-07-21 15:34:44 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721153444-lugbjkj1oq65ugq3
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
$(LANGUAGE).
(WARN, DEBUG, COVERAGE, LANGUAGE): New.
(LDFLAGS): New; use $(COVERAGE)
* plugbasedclient.c: Added copyright header.
(process.buffer_size, process.buffer_length): Changed to "size_t".
(main): Cast arguments to malloc and realloc. Detect read errors
from processes.
* mandosclient.c: Added copyright header.
(interface): Moved to inside "main".
(gpg_packet_decrypt): Renamed to "pgp_packet_decrypt"; all callers
changed. Changed "new_packet_capacity" and
"new_packet_length" to be ssize_t. Cast
arguments to realloc.
(debuggnutls): Attribute "level" argument as unused.
(empty_log): Attribute "level" and "txt" arguments as unused.
(start_mandos_communication): New argument "if_index". Bug fix:
check ret, no tcp_sd, for errors from
setsockopt. Use "if_index" directly
instead of looking up the index. Loop
around fwrite until all data is written.
(resolve_callback): Attribute "txt", and "flags" as usused. Added
default case to switch. Also show server host
name. Call start_mandos_communication with
"interface".
(browse_callback): Added default case to switch.
(main): Variable "interface" moved here. Cast "srand" argument.
Bug fix: Call avahi_s_service_browser_new with index of
"interface", not "eth0".
* passprompt.c: Added copyright header.
(termination_handler): Attribute "signum" argument as unused.
$(LANGUAGE).
(WARN, DEBUG, COVERAGE, LANGUAGE): New.
(LDFLAGS): New; use $(COVERAGE)
* plugbasedclient.c: Added copyright header.
(process.buffer_size, process.buffer_length): Changed to "size_t".
(main): Cast arguments to malloc and realloc. Detect read errors
from processes.
* mandosclient.c: Added copyright header.
(interface): Moved to inside "main".
(gpg_packet_decrypt): Renamed to "pgp_packet_decrypt"; all callers
changed. Changed "new_packet_capacity" and
"new_packet_length" to be ssize_t. Cast
arguments to realloc.
(debuggnutls): Attribute "level" argument as unused.
(empty_log): Attribute "level" and "txt" arguments as unused.
(start_mandos_communication): New argument "if_index". Bug fix:
check ret, no tcp_sd, for errors from
setsockopt. Use "if_index" directly
instead of looking up the index. Loop
around fwrite until all data is written.
(resolve_callback): Attribute "txt", and "flags" as usused. Added
default case to switch. Also show server host
name. Call start_mandos_communication with
"interface".
(browse_callback): Added default case to switch.
(main): Variable "interface" moved here. Cast "srand" argument.
Bug fix: Call avahi_s_service_browser_new with index of
"interface", not "eth0".
* passprompt.c: Added copyright header.
(termination_handler): Attribute "signum" argument as unused.
- files added:
- ca.pem
- files removed:
- .bzrignore
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
8
8
* includes the following functions: "resolve_callback",
9
9
* "browse_callback", and parts of "main".
10
10
*
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
11
* Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
12
* Påhlsson.
13
13
*
14
14
* This program is free software: you can redistribute it and/or
15
15
* modify it under the terms of the GNU General Public License as
25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
27
27
*
28
* Contact the authors at <mandos@fukt.bsnet.se>.
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
29
30
*/
30
31
31
/* Needed by GPGME, specifically gpgme_data_seek() */
32
#define _FORTIFY_SOURCE 2
33
32
34
#define _LARGEFILE_SOURCE
33
35
#define _FILE_OFFSET_BITS 64
34
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
#include <assert.h> /* assert() */
59
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
SIOCSIFFLAGS, if_indextoname(),
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
70
#include <argp.h> /* struct argp_option, error_t, struct
71
argp_state, struct argp,
72
argp_parse(), ARGP_KEY_ARG,
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
74
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
79
43
#include <avahi-core/core.h>
80
44
#include <avahi-core/lookup.h>
81
45
#include <avahi-core/log.h>
83
47
#include <avahi-common/malloc.h>
84
48
#include <avahi-common/error.h>
85
49
86
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
90
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
GNUTLS_OPENPGP_FMT_BASE64 */
94
95
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
101
50
//mandos client part
51
#include <sys/types.h> /* socket(), setsockopt(),
52
inet_pton() */
53
#include <sys/socket.h> /* socket(), setsockopt(),
54
struct sockaddr_in6,
55
struct in6_addr, inet_pton() */
56
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
57
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
58
59
#include <unistd.h> /* close() */
60
#include <netinet/in.h>
61
#include <stdbool.h> /* true */
62
#include <string.h> /* memset */
63
#include <arpa/inet.h> /* inet_pton() */
64
#include <iso646.h> /* not */
65
66
// gpgme
67
#include <errno.h> /* perror() */
68
#include <gpgme.h>
69
70
// getopt long
71
#include <getopt.h>
72
73
#ifndef CERT_ROOT
74
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
75
#endif
76
#define CERTFILE CERT_ROOT "openpgp-client.txt"
77
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
102
78
#define BUFFER_SIZE 256
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
79
#define DH_BITS 1024
111
80
112
81
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
82
117
/* Used for passing in values through the Avahi callback functions */
118
83
typedef struct {
119
AvahiSimplePoll *simple_poll;
120
AvahiServer *server;
84
gnutls_session_t session;
121
85
gnutls_certificate_credentials_t cred;
122
unsigned int dh_bits;
123
86
gnutls_dh_params_t dh_params;
124
const char *priority;
87
} encrypted_session;
88
89
90
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
91
char **new_packet, const char *homedir){
92
gpgme_data_t dh_crypto, dh_plain;
125
93
gpgme_ctx_t ctx;
126
} mandos_context;
127
128
/*
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.
132
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
134
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
138
return 0;
139
}
140
buffer_capacity += BUFFER_SIZE;
141
}
142
return buffer_capacity;
143
}
144
145
/*
146
* Initialize GPGME.
147
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
151
94
gpgme_error_t rc;
95
ssize_t ret;
96
ssize_t new_packet_capacity = 0;
97
ssize_t new_packet_length = 0;
152
98
gpgme_engine_info_t engine_info;
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
99
190
100
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
101
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
192
102
}
193
103
194
104
/* Init GPGME */
195
105
gpgme_check_version(NULL);
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
106
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
202
107
203
/* Set GPGME home directory for the OpenPGP engine only */
108
/* Set GPGME home directory */
204
109
rc = gpgme_get_engine_info (&engine_info);
205
110
if (rc != GPG_ERR_NO_ERROR){
206
111
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
112
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
113
return -1;
209
114
}
210
115
while(engine_info != NULL){
211
116
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
117
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
118
engine_info->file_name, homedir);
214
119
break;
215
120
}
216
121
engine_info = engine_info->next;
217
122
}
218
123
if(engine_info == NULL){
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if (not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if (debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
}
255
256
/* Create new GPGME data buffer from memory cryptotext */
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
0);
124
fprintf(stderr, "Could not set home dir to %s\n", homedir);
125
return -1;
126
}
127
128
/* Create new GPGME data buffer from packet buffer */
129
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
259
130
if (rc != GPG_ERR_NO_ERROR){
260
131
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
132
gpgme_strsource(rc), gpgme_strerror(rc));
267
138
if (rc != GPG_ERR_NO_ERROR){
268
139
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
140
gpgme_strsource(rc), gpgme_strerror(rc));
270
gpgme_data_release(dh_crypto);
271
return -1;
272
}
273
274
/* Decrypt data from the cryptotext data buffer to the plaintext
275
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
141
return -1;
142
}
143
144
/* Create new GPGME "context" */
145
rc = gpgme_new(&ctx);
146
if (rc != GPG_ERR_NO_ERROR){
147
fprintf(stderr, "bad gpgme_new: %s: %s\n",
148
gpgme_strsource(rc), gpgme_strerror(rc));
149
return -1;
150
}
151
152
/* Decrypt data from the FILE pointer to the plaintext data
153
buffer */
154
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
155
if (rc != GPG_ERR_NO_ERROR){
278
156
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
157
gpgme_strsource(rc), gpgme_strerror(rc));
280
plaintext_length = -1;
281
if (debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
158
return -1;
159
}
160
161
if(debug){
162
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
163
}
164
165
if (debug){
166
gpgme_decrypt_result_t result;
167
result = gpgme_op_decrypt_result(ctx);
168
if (result == NULL){
169
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
170
} else {
171
fprintf(stderr, "Unsupported algorithm: %s\n",
172
result->unsupported_algorithm);
173
fprintf(stderr, "Wrong key usage: %d\n",
174
result->wrong_key_usage);
175
if(result->file_name != NULL){
176
fprintf(stderr, "File name: %s\n", result->file_name);
177
}
178
gpgme_recipient_t recipient;
179
recipient = result->recipients;
180
if(recipient){
181
while(recipient != NULL){
182
fprintf(stderr, "Public key algorithm: %s\n",
183
gpgme_pubkey_algo_name(recipient->pubkey_algo));
184
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
185
fprintf(stderr, "Secret key available: %s\n",
186
recipient->status == GPG_ERR_NO_SECKEY
187
? "No" : "Yes");
188
recipient = recipient->next;
306
189
}
307
190
}
308
191
}
309
goto decrypt_end;
310
192
}
311
193
312
if(debug){
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
194
/* Delete the GPGME FILE pointer cryptotext data buffer */
195
gpgme_data_release(dh_crypto);
315
196
316
197
/* 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");
319
plaintext_length = -1;
320
goto decrypt_end;
321
}
322
323
*plaintext = NULL;
198
gpgme_data_seek(dh_plain, 0, SEEK_SET);
199
200
*new_packet = 0;
324
201
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
330
plaintext_length = -1;
331
goto decrypt_end;
202
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
203
*new_packet = realloc(*new_packet,
204
(unsigned int)new_packet_capacity
205
+ BUFFER_SIZE);
206
if (*new_packet == NULL){
207
perror("realloc");
208
return -1;
209
}
210
new_packet_capacity += BUFFER_SIZE;
332
211
}
333
212
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
213
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
335
214
BUFFER_SIZE);
336
215
/* Print the data, if any */
337
216
if (ret == 0){
338
/* EOF */
339
217
break;
340
218
}
341
219
if(ret < 0){
342
220
perror("gpgme_data_read");
343
plaintext_length = -1;
344
goto decrypt_end;
345
}
346
plaintext_length += ret;
347
}
348
349
if(debug){
350
fprintf(stderr, "Decrypted password is: ");
351
for(ssize_t i = 0; i < plaintext_length; i++){
352
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
353
}
354
fprintf(stderr, "\n");
355
}
356
357
decrypt_end:
358
359
/* Delete the GPGME cryptotext data buffer */
360
gpgme_data_release(dh_crypto);
221
return -1;
222
}
223
new_packet_length += ret;
224
}
225
226
/* FIXME: check characters before printing to screen so to not print
227
terminal control characters */
228
/* if(debug){ */
229
/* fprintf(stderr, "decrypted password is: "); */
230
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
231
/* fprintf(stderr, "\n"); */
232
/* } */
361
233
362
234
/* Delete the GPGME plaintext data buffer */
363
235
gpgme_data_release(dh_plain);
364
return plaintext_length;
236
return new_packet_length;
365
237
}
366
238
367
239
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
240
const char *ret = gnutls_strerror (value);
369
241
if (ret == NULL)
370
242
ret = "(unknown)";
371
243
return ret;
372
244
}
373
245
374
/* GnuTLS log function callback */
375
static void debuggnutls(__attribute__((unused)) int level,
376
const char* string){
377
fprintf(stderr, "GnuTLS: %s", string);
246
void debuggnutls(__attribute__((unused)) int level,
247
const char* string){
248
fprintf(stderr, "%s", string);
378
249
}
379
250
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
251
int initgnutls(encrypted_session *es){
252
const char *err;
383
253
int ret;
384
254
385
255
if(debug){
386
256
fprintf(stderr, "Initializing GnuTLS\n");
387
257
}
388
258
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
259
if ((ret = gnutls_global_init ())
260
!= GNUTLS_E_SUCCESS) {
261
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
393
262
return -1;
394
263
}
395
264
396
265
if (debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
400
266
gnutls_global_set_log_level(11);
401
267
gnutls_global_set_log_function(debuggnutls);
402
268
}
403
269
404
/* 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 */
270
/* openpgp credentials */
271
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
272
!= GNUTLS_E_SUCCESS) {
273
fprintf (stderr, "memory error: %s\n",
409
274
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
411
275
return -1;
412
276
}
413
277
414
278
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
279
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
280
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
281
KEYFILE);
418
282
}
419
283
420
284
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
285
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
423
286
if (ret != GNUTLS_E_SUCCESS) {
424
fprintf(stderr,
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
287
fprintf
288
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
289
" '%s')\n",
290
ret, CERTFILE, KEYFILE);
291
fprintf(stdout, "The Error is: %s\n",
428
292
safer_gnutls_strerror(ret));
429
goto globalfail;
430
}
431
432
/* 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));
437
goto globalfail;
438
}
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));
443
goto globalfail;
444
}
445
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
448
return 0;
449
450
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
return -1;
455
}
456
457
static int init_gnutls_session(mandos_context *mc,
458
gnutls_session_t *session){
459
int ret;
460
/* GnuTLS session creation */
461
ret = gnutls_init(session, GNUTLS_SERVER);
462
if (ret != GNUTLS_E_SUCCESS){
293
return -1;
294
}
295
296
//GnuTLS server initialization
297
if ((ret = gnutls_dh_params_init (&es->dh_params))
298
!= GNUTLS_E_SUCCESS) {
299
fprintf (stderr, "Error in dh parameter initialization: %s\n",
300
safer_gnutls_strerror(ret));
301
return -1;
302
}
303
304
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf (stderr, "Error in prime generation: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
311
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
312
313
// GnuTLS session creation
314
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
315
!= GNUTLS_E_SUCCESS){
463
316
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
464
317
safer_gnutls_strerror(ret));
465
318
}
466
319
467
{
468
const char *err;
469
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
470
if (ret != GNUTLS_E_SUCCESS) {
471
fprintf(stderr, "Syntax error at: %s\n", err);
472
fprintf(stderr, "GnuTLS error: %s\n",
473
safer_gnutls_strerror(ret));
474
gnutls_deinit (*session);
475
return -1;
476
}
320
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
321
!= GNUTLS_E_SUCCESS) {
322
fprintf(stderr, "Syntax error at: %s\n", err);
323
fprintf(stderr, "GnuTLS error: %s\n",
324
safer_gnutls_strerror(ret));
325
return -1;
477
326
}
478
327
479
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
480
mc->cred);
481
if (ret != GNUTLS_E_SUCCESS) {
482
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
328
if ((ret = gnutls_credentials_set
329
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
330
!= GNUTLS_E_SUCCESS) {
331
fprintf(stderr, "Error setting a credentials set: %s\n",
483
332
safer_gnutls_strerror(ret));
484
gnutls_deinit (*session);
485
333
return -1;
486
334
}
487
335
488
336
/* ignore client certificate if any. */
489
gnutls_certificate_server_set_request (*session,
337
gnutls_certificate_server_set_request (es->session,
490
338
GNUTLS_CERT_IGNORE);
491
339
492
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
340
gnutls_dh_set_prime_bits (es->session, DH_BITS);
493
341
494
342
return 0;
495
343
}
496
344
497
/* Avahi log function callback */
498
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
499
__attribute__((unused)) const char *txt){}
345
void empty_log(__attribute__((unused)) AvahiLogLevel level,
346
__attribute__((unused)) const char *txt){}
500
347
501
/* Called when a Mandos server is found */
502
static int start_mandos_communication(const char *ip, uint16_t port,
503
AvahiIfIndex if_index,
504
mandos_context *mc){
348
int start_mandos_communication(char *ip, uint16_t port,
349
unsigned int if_index){
505
350
int ret, tcp_sd;
506
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
351
struct sockaddr_in6 to;
352
encrypted_session es;
507
353
char *buffer = NULL;
508
354
char *decrypted_buffer;
509
355
size_t buffer_length = 0;
510
356
size_t buffer_capacity = 0;
511
357
ssize_t decrypted_buffer_size;
512
size_t written;
513
358
int retval = 0;
514
359
char interface[IF_NAMESIZE];
515
gnutls_session_t session;
516
517
ret = init_gnutls_session (mc, &session);
518
if (ret != 0){
519
return -1;
520
}
521
360
522
361
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
362
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
525
363
}
526
364
527
365
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
530
368
return -1;
531
369
}
532
370
533
if(debug){
534
if(if_indextoname((unsigned int)if_index, interface) == NULL){
371
if(if_indextoname(if_index, interface) == NULL){
372
if(debug){
535
373
perror("if_indextoname");
536
return -1;
537
374
}
375
return -1;
376
}
377
378
if(debug){
538
379
fprintf(stderr, "Binding to interface %s\n", interface);
539
380
}
540
381
541
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);
382
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
383
if(ret < 0) {
384
perror("setsockopt bindtodevice");
385
return -1;
386
}
387
388
memset(&to,0,sizeof(to));
389
to.sin6_family = AF_INET6;
390
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
546
391
if (ret < 0 ){
547
392
perror("inet_pton");
548
393
return -1;
549
}
394
}
550
395
if(ret == 0){
551
396
fprintf(stderr, "Bad address: %s\n", ip);
552
397
return -1;
553
398
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
399
/* Spurious warnings for the next line, see for instance
400
<http://bugs.debian.org/488884> */
401
to.sin6_port = htons(port);
555
402
556
to.in6.sin6_scope_id = (uint32_t)if_index;
403
to.sin6_scope_id = (uint32_t)if_index;
557
404
558
405
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){
564
perror("inet_ntop");
565
} else {
566
if(strcmp(addrstr, ip) != 0){
567
fprintf(stderr, "Canonical address form: %s\n", addrstr);
568
}
569
}
406
fprintf(stderr, "Connection to: %s\n", ip);
570
407
}
571
408
572
ret = connect(tcp_sd, &to.in, sizeof(to));
409
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
573
410
if (ret < 0){
574
411
perror("connect");
575
412
return -1;
576
413
}
577
414
578
const char *out = mandos_protocol_version;
579
written = 0;
580
while (true){
581
size_t out_size = strlen(out);
582
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
out_size - written));
584
if (ret == -1){
585
perror("write");
586
retval = -1;
587
goto mandos_end;
588
}
589
written += (size_t)ret;
590
if(written < out_size){
591
continue;
592
} else {
593
if (out == mandos_protocol_version){
594
written = 0;
595
out = "\r\n";
596
} else {
597
break;
598
}
599
}
415
ret = initgnutls (&es);
416
if (ret != 0){
417
retval = -1;
418
return -1;
600
419
}
601
420
421
gnutls_transport_set_ptr (es.session,
422
(gnutls_transport_ptr_t) tcp_sd);
423
602
424
if(debug){
603
425
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
426
}
605
427
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
428
ret = gnutls_handshake (es.session);
611
429
612
430
if (ret != GNUTLS_E_SUCCESS){
613
if(debug){
614
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
615
gnutls_perror (ret);
616
}
431
fprintf(stderr, "\n*** Handshake failed ***\n");
432
gnutls_perror (ret);
617
433
retval = -1;
618
goto mandos_end;
434
goto exit;
619
435
}
620
436
621
/* Read OpenPGP packet that contains the wanted password */
437
//Retrieve OpenPGP packet that contains the wanted password
622
438
623
439
if(debug){
624
440
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
625
441
ip);
626
442
}
627
443
628
444
while(true){
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
buffer_capacity);
631
if (buffer_capacity == 0){
632
perror("adjustbuffer");
633
retval = -1;
634
goto mandos_end;
445
if (buffer_length + BUFFER_SIZE > buffer_capacity){
446
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
447
if (buffer == NULL){
448
perror("realloc");
449
goto exit;
450
}
451
buffer_capacity += BUFFER_SIZE;
635
452
}
636
453
637
ret = gnutls_record_recv(session, buffer+buffer_length,
638
BUFFER_SIZE);
454
ret = gnutls_record_recv
455
(es.session, buffer+buffer_length, BUFFER_SIZE);
639
456
if (ret == 0){
640
457
break;
641
458
}
645
462
case GNUTLS_E_AGAIN:
646
463
break;
647
464
case GNUTLS_E_REHANDSHAKE:
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
465
ret = gnutls_handshake (es.session);
651
466
if (ret < 0){
652
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
467
fprintf(stderr, "\n*** Handshake failed ***\n");
653
468
gnutls_perror (ret);
654
469
retval = -1;
655
goto mandos_end;
470
goto exit;
656
471
}
657
472
break;
658
473
default:
659
474
fprintf(stderr, "Unknown error while reading data from"
660
" encrypted session with Mandos server\n");
475
" encrypted session with mandos server\n");
661
476
retval = -1;
662
gnutls_bye (session, GNUTLS_SHUT_RDWR);
663
goto mandos_end;
477
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
478
goto exit;
664
479
}
665
480
} else {
666
481
buffer_length += (size_t) ret;
667
482
}
668
483
}
669
484
670
if(debug){
671
fprintf(stderr, "Closing TLS session\n");
672
}
673
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
676
485
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
486
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
487
buffer_length,
679
&decrypted_buffer);
488
&decrypted_buffer,
489
CERT_ROOT);
680
490
if (decrypted_buffer_size >= 0){
681
written = 0;
682
while(written < (size_t) decrypted_buffer_size){
683
ret = (int)fwrite (decrypted_buffer + written, 1,
684
(size_t)decrypted_buffer_size - written,
685
stdout);
491
while(decrypted_buffer_size > 0){
492
ret = fwrite (decrypted_buffer, 1, (size_t)decrypted_buffer_size,
493
stdout);
686
494
if(ret == 0 and ferror(stdout)){
687
495
if(debug){
688
496
fprintf(stderr, "Error writing encrypted data: %s\n",
691
499
retval = -1;
692
500
break;
693
501
}
694
written += (size_t)ret;
502
decrypted_buffer += ret;
503
decrypted_buffer_size -= ret;
695
504
}
696
505
free(decrypted_buffer);
697
506
} else {
698
507
retval = -1;
699
508
}
700
} else {
701
retval = -1;
702
}
703
704
/* Shutdown procedure */
705
706
mandos_end:
509
}
510
511
//shutdown procedure
512
513
if(debug){
514
fprintf(stderr, "Closing TLS session\n");
515
}
516
707
517
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
712
gnutls_deinit (session);
518
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
519
exit:
520
close(tcp_sd);
521
gnutls_deinit (es.session);
522
gnutls_certificate_free_credentials (es.cred);
523
gnutls_global_deinit ();
713
524
return retval;
714
525
}
715
526
716
static void resolve_callback(AvahiSServiceResolver *r,
717
AvahiIfIndex interface,
718
AVAHI_GCC_UNUSED AvahiProtocol protocol,
719
AvahiResolverEvent event,
720
const char *name,
721
const char *type,
722
const char *domain,
723
const char *host_name,
724
const AvahiAddress *address,
725
uint16_t port,
726
AVAHI_GCC_UNUSED AvahiStringList *txt,
727
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
flags,
729
void* userdata) {
730
mandos_context *mc = userdata;
527
static AvahiSimplePoll *simple_poll = NULL;
528
static AvahiServer *server = NULL;
529
530
static void resolve_callback(
531
AvahiSServiceResolver *r,
532
AVAHI_GCC_UNUSED AvahiIfIndex interface,
533
AVAHI_GCC_UNUSED AvahiProtocol protocol,
534
AvahiResolverEvent event,
535
const char *name,
536
const char *type,
537
const char *domain,
538
const char *host_name,
539
const AvahiAddress *address,
540
uint16_t port,
541
AVAHI_GCC_UNUSED AvahiStringList *txt,
542
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
543
AVAHI_GCC_UNUSED void* userdata) {
544
731
545
assert(r);
732
546
733
547
/* Called whenever a service has been resolved successfully or
734
548
timed out */
735
549
736
550
switch (event) {
737
551
default:
738
552
case AVAHI_RESOLVER_FAILURE:
739
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
740
" of type '%s' in domain '%s': %s\n", name, type, domain,
741
avahi_strerror(avahi_server_errno(mc->server)));
553
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
554
" type '%s' in domain '%s': %s\n", name, type, domain,
555
avahi_strerror(avahi_server_errno(server)));
742
556
break;
743
557
744
558
case AVAHI_RESOLVER_FOUND:
745
559
{
746
560
char ip[AVAHI_ADDRESS_STR_MAX];
747
561
avahi_address_snprint(ip, sizeof(ip), address);
748
562
if(debug){
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
563
fprintf(stderr, "Mandos server found on %s (%s) on port %d\n",
564
host_name, ip, port);
752
565
}
753
int ret = start_mandos_communication(ip, port, interface, mc);
566
int ret = start_mandos_communication(ip, port,
567
(unsigned int)
568
interface);
754
569
if (ret == 0){
755
avahi_simple_poll_quit(mc->simple_poll);
570
exit(EXIT_SUCCESS);
571
} else {
572
exit(EXIT_FAILURE);
756
573
}
757
574
}
758
575
}
759
576
avahi_s_service_resolver_free(r);
760
577
}
761
578
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;
773
assert(b);
774
775
/* Called whenever a new services becomes available on the LAN or
776
is removed from the LAN */
777
778
switch (event) {
779
default:
780
case AVAHI_BROWSER_FAILURE:
781
782
fprintf(stderr, "(Avahi browser) %s\n",
783
avahi_strerror(avahi_server_errno(mc->server)));
784
avahi_simple_poll_quit(mc->simple_poll);
785
return;
786
787
case AVAHI_BROWSER_NEW:
788
/* We ignore the returned Avahi resolver object. In the callback
789
function we free it. If the Avahi server is terminated before
790
the callback function is called the Avahi server will free the
791
resolver for us. */
792
793
if (!(avahi_s_service_resolver_new(mc->server, interface,
794
protocol, name, type, domain,
795
AVAHI_PROTO_INET6, 0,
796
resolve_callback, mc)))
797
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
798
name, avahi_strerror(avahi_server_errno(mc->server)));
799
break;
800
801
case AVAHI_BROWSER_REMOVE:
802
break;
803
804
case AVAHI_BROWSER_ALL_FOR_NOW:
805
case AVAHI_BROWSER_CACHE_EXHAUSTED:
806
if(debug){
807
fprintf(stderr, "No Mandos server found, still searching...\n");
579
static void browse_callback(
580
AvahiSServiceBrowser *b,
581
AvahiIfIndex interface,
582
AvahiProtocol protocol,
583
AvahiBrowserEvent event,
584
const char *name,
585
const char *type,
586
const char *domain,
587
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
588
void* userdata) {
589
590
AvahiServer *s = userdata;
591
assert(b);
592
593
/* Called whenever a new services becomes available on the LAN or
594
is removed from the LAN */
595
596
switch (event) {
597
default:
598
case AVAHI_BROWSER_FAILURE:
599
600
fprintf(stderr, "(Browser) %s\n",
601
avahi_strerror(avahi_server_errno(server)));
602
avahi_simple_poll_quit(simple_poll);
603
return;
604
605
case AVAHI_BROWSER_NEW:
606
/* We ignore the returned resolver object. In the callback
607
function we free it. If the server is terminated before
608
the callback function is called the server will free
609
the resolver for us. */
610
611
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
612
type, domain,
613
AVAHI_PROTO_INET6, 0,
614
resolve_callback, s)))
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(s)));
617
break;
618
619
case AVAHI_BROWSER_REMOVE:
620
break;
621
622
case AVAHI_BROWSER_ALL_FOR_NOW:
623
case AVAHI_BROWSER_CACHE_EXHAUSTED:
624
break;
808
625
}
809
break;
810
}
811
626
}
812
627
813
int main(int argc, char *argv[]){
628
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
629
AvahiServerConfig config;
814
630
AvahiSServiceBrowser *sb = NULL;
815
631
int error;
816
632
int ret;
817
int exitcode = EXIT_SUCCESS;
633
int returncode = EXIT_SUCCESS;
818
634
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);
894
}
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
}
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
/* 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);
930
ret = ioctl(sd, SIOCGIFFLAGS, &network);
931
if(ret == -1){
932
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));
946
if(ret == -1){
947
perror("close");
948
}
949
}
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
987
if_index = (AvahiIfIndex) if_nametoindex(interface);
988
if(if_index == 0){
989
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;
635
636
while (true){
637
static struct option long_options[] = {
638
{"debug", no_argument, (int *)&debug, 1},
639
{"interface", required_argument, 0, 'i'},
640
{0, 0, 0, 0} };
641
642
int option_index = 0;
643
ret = getopt_long (argc, argv, "i:", long_options,
644
&option_index);
645
646
if (ret == -1){
647
break;
648
}
649
650
switch(ret){
651
case 0:
652
break;
653
case 'i':
654
interface = optarg;
655
break;
656
default:
657
exit(EXIT_FAILURE);
658
}
1018
659
}
1019
660
1020
661
if (not debug){
1021
662
avahi_set_log_function(empty_log);
1022
663
}
1023
664
1024
/* Initialize the pseudo-RNG for Avahi */
665
/* Initialize the psuedo-RNG */
1025
666
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",
667
668
/* Allocate main loop object */
669
if (!(simple_poll = avahi_simple_poll_new())) {
670
fprintf(stderr, "Failed to create simple poll object.\n");
671
672
goto exit;
673
}
674
675
/* Do not publish any local records */
676
avahi_server_config_init(&config);
677
config.publish_hinfo = 0;
678
config.publish_addresses = 0;
679
config.publish_workstation = 0;
680
config.publish_domain = 0;
681
682
/* Allocate a new server */
683
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
684
&config, NULL, NULL, &error);
685
686
/* Free the configuration data */
687
avahi_server_config_free(&config);
688
689
/* Check if creating the server object succeeded */
690
if (!server) {
691
fprintf(stderr, "Failed to create server: %s\n",
1057
692
avahi_strerror(error));
1058
exitcode = EXIT_FAILURE;
1059
goto end;
693
returncode = EXIT_FAILURE;
694
goto exit;
1060
695
}
1061
696
1062
/* Create the Avahi service browser */
1063
sb = avahi_s_service_browser_new(mc.server, if_index,
697
/* Create the service browser */
698
sb = avahi_s_service_browser_new(server,
699
(AvahiIfIndex)
700
if_nametoindex(interface),
1064
701
AVAHI_PROTO_INET6,
1065
702
"_mandos._tcp", NULL, 0,
1066
browse_callback, &mc);
1067
if (sb == NULL) {
703
browse_callback, server);
704
if (!sb) {
1068
705
fprintf(stderr, "Failed to create service browser: %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
1070
exitcode = EXIT_FAILURE;
1071
goto end;
706
avahi_strerror(avahi_server_errno(server)));
707
returncode = EXIT_FAILURE;
708
goto exit;
1072
709
}
1073
710
1074
711
/* Run the main loop */
1075
712
1076
713
if (debug){
1077
fprintf(stderr, "Starting Avahi loop search\n");
714
fprintf(stderr, "Starting avahi loop search\n");
1078
715
}
1079
716
1080
avahi_simple_poll_loop(mc.simple_poll);
1081
1082
end:
1083
717
avahi_simple_poll_loop(simple_poll);
718
719
exit:
720
1084
721
if (debug){
1085
722
fprintf(stderr, "%s exiting\n", argv[0]);
1086
723
}
1087
724
1088
725
/* Cleanup things */
1089
if (sb != NULL)
726
if (sb)
1090
727
avahi_s_service_browser_free(sb);
1091
728
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){
1113
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;
729
if (server)
730
avahi_server_free(server);
731
732
if (simple_poll)
733
avahi_simple_poll_free(simple_poll);
734
735
return returncode;
1144
736
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0