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- Committer: Teddy Hogeborn
- Date: 2009-01-18 06:41:57 UTC
- mto: (24.1.127 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 249.
- Revision ID: teddy@fukt.bsnet.se-20090118064157-8o4oia1y0t8di0xj
* debian/mandos-client.lintian-overrides: Remove override for
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
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
32
33
#define _LARGEFILE_SOURCE
33
34
#define _FILE_OFFSET_BITS 64
34
35
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
41
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
42
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
40
#include <stdint.h> /* uint16_t, uint32_t */
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(),
52
DIR */
53
#include <sys/stat.h> /* open() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
57
#include <fcntl.h> /* open() */
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
*/
60
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
61
#include <assert.h> /* assert() */
62
#include <errno.h> /* perror(), errno */
63
#include <time.h> /* time() */
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
65
SIOCSIFFLAGS, if_indextoname(),
66
if_nametoindex(), IF_NAMESIZE */
67
#include <netinet/in.h>
68
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
69
getuid(), getgid(), setuid(),
70
setgid() */
71
#include <arpa/inet.h> /* inet_pton(), htons */
72
#include <iso646.h> /* not, and, or */
73
#include <argp.h> /* struct argp_option, error_t, struct
74
argp_state, struct argp,
75
argp_parse(), ARGP_KEY_ARG,
76
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
77
78
/* Avahi */
79
/* All Avahi types, constants and functions
80
Avahi*, avahi_*,
81
AVAHI_* */
43
82
#include <avahi-core/core.h>
44
83
#include <avahi-core/lookup.h>
45
84
#include <avahi-core/log.h>
47
86
#include <avahi-common/malloc.h>
48
87
#include <avahi-common/error.h>
49
88
50
//mandos client part
51
#include <sys/types.h> /* socket(), inet_pton() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton() */
54
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
55
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
56
57
#include <unistd.h> /* close() */
58
#include <netinet/in.h>
59
#include <stdbool.h> /* true */
60
#include <string.h> /* memset */
61
#include <arpa/inet.h> /* inet_pton() */
62
#include <iso646.h> /* not */
63
64
// gpgme
65
#include <errno.h> /* perror() */
66
#include <gpgme.h>
67
68
// getopt_long
69
#include <getopt.h>
89
/* GnuTLS */
90
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
91
functions:
92
gnutls_*
93
init_gnutls_session(),
94
GNUTLS_* */
95
#include <gnutls/openpgp.h>
96
/* gnutls_certificate_set_openpgp_key_file(),
97
GNUTLS_OPENPGP_FMT_BASE64 */
98
99
/* GPGME */
100
#include <gpgme.h> /* All GPGME types, constants and
101
functions:
102
gpgme_*
103
GPGME_PROTOCOL_OpenPGP,
104
GPG_ERR_NO_* */
70
105
71
106
#define BUFFER_SIZE 256
72
107
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
76
111
77
112
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client " VERSION;
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
78
116
79
/* Used for passing in values through all the callback functions */
117
/* Used for passing in values through the Avahi callback functions */
80
118
typedef struct {
81
119
AvahiSimplePoll *simple_poll;
82
120
AvahiServer *server;
83
121
gnutls_certificate_credentials_t cred;
84
122
unsigned int dh_bits;
123
gnutls_dh_params_t dh_params;
85
124
const char *priority;
125
gpgme_ctx_t ctx;
86
126
} mandos_context;
87
127
88
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet,
90
const char *homedir){
91
gpgme_data_t dh_crypto, dh_plain;
92
gpgme_ctx_t ctx;
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;
93
151
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
97
152
gpgme_engine_info_t engine_info;
98
99
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
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 = (int)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 = (int)TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
190
if(debug){
191
fprintf(stderr, "Initialize gpgme\n");
101
192
}
102
193
103
194
/* Init GPGME */
104
195
gpgme_check_version(NULL);
105
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
106
if (rc != GPG_ERR_NO_ERROR){
197
if(rc != GPG_ERR_NO_ERROR){
107
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
108
199
gpgme_strsource(rc), gpgme_strerror(rc));
109
return -1;
200
return false;
110
201
}
111
202
112
/* Set GPGME home directory */
113
rc = gpgme_get_engine_info (&engine_info);
114
if (rc != GPG_ERR_NO_ERROR){
203
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info(&engine_info);
205
if(rc != GPG_ERR_NO_ERROR){
115
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
116
207
gpgme_strsource(rc), gpgme_strerror(rc));
117
return -1;
208
return false;
118
209
}
119
210
while(engine_info != NULL){
120
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
121
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
122
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
123
214
break;
124
215
}
125
216
engine_info = engine_info->next;
126
217
}
127
218
if(engine_info == NULL){
128
fprintf(stderr, "Could not set home dir to %s\n", homedir);
129
return -1;
130
}
131
132
/* Create new GPGME data buffer from packet buffer */
133
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
134
if (rc != GPG_ERR_NO_ERROR){
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);
259
if(rc != GPG_ERR_NO_ERROR){
135
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
136
261
gpgme_strsource(rc), gpgme_strerror(rc));
137
262
return -1;
139
264
140
265
/* Create new empty GPGME data buffer for the plaintext */
141
266
rc = gpgme_data_new(&dh_plain);
142
if (rc != GPG_ERR_NO_ERROR){
267
if(rc != GPG_ERR_NO_ERROR){
143
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
144
269
gpgme_strsource(rc), gpgme_strerror(rc));
145
return -1;
146
}
147
148
/* Create new GPGME "context" */
149
rc = gpgme_new(&ctx);
150
if (rc != GPG_ERR_NO_ERROR){
151
fprintf(stderr, "bad gpgme_new: %s: %s\n",
152
gpgme_strsource(rc), gpgme_strerror(rc));
153
return -1;
154
}
155
156
/* Decrypt data from the FILE pointer to the plaintext data
157
buffer */
158
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
159
if (rc != GPG_ERR_NO_ERROR){
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);
277
if(rc != GPG_ERR_NO_ERROR){
160
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
161
279
gpgme_strsource(rc), gpgme_strerror(rc));
162
return -1;
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
}
306
}
307
}
308
}
309
goto decrypt_end;
163
310
}
164
311
165
312
if(debug){
166
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
167
}
168
169
if (debug){
170
gpgme_decrypt_result_t result;
171
result = gpgme_op_decrypt_result(ctx);
172
if (result == NULL){
173
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
174
} else {
175
fprintf(stderr, "Unsupported algorithm: %s\n",
176
result->unsupported_algorithm);
177
fprintf(stderr, "Wrong key usage: %d\n",
178
result->wrong_key_usage);
179
if(result->file_name != NULL){
180
fprintf(stderr, "File name: %s\n", result->file_name);
181
}
182
gpgme_recipient_t recipient;
183
recipient = result->recipients;
184
if(recipient){
185
while(recipient != NULL){
186
fprintf(stderr, "Public key algorithm: %s\n",
187
gpgme_pubkey_algo_name(recipient->pubkey_algo));
188
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
189
fprintf(stderr, "Secret key available: %s\n",
190
recipient->status == GPG_ERR_NO_SECKEY
191
? "No" : "Yes");
192
recipient = recipient->next;
193
}
194
}
195
}
196
}
197
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
200
315
201
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
202
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
perror("pgpme_data_seek");
317
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
204
321
}
205
322
206
*new_packet = 0;
323
*plaintext = NULL;
207
324
while(true){
208
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
209
*new_packet = realloc(*new_packet,
210
(unsigned int)new_packet_capacity
211
+ BUFFER_SIZE);
212
if (*new_packet == NULL){
213
perror("realloc");
214
return -1;
215
}
216
new_packet_capacity += BUFFER_SIZE;
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;
217
332
}
218
333
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
220
335
BUFFER_SIZE);
221
336
/* Print the data, if any */
222
if (ret == 0){
337
if(ret == 0){
338
/* EOF */
223
339
break;
224
340
}
225
341
if(ret < 0){
226
342
perror("gpgme_data_read");
227
return -1;
228
}
229
new_packet_length += ret;
230
}
231
232
/* FIXME: check characters before printing to screen so to not print
233
terminal control characters */
234
/* if(debug){ */
235
/* fprintf(stderr, "decrypted password is: "); */
236
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
237
/* fprintf(stderr, "\n"); */
238
/* } */
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);
239
361
240
362
/* Delete the GPGME plaintext data buffer */
241
363
gpgme_data_release(dh_plain);
242
return new_packet_length;
364
return plaintext_length;
243
365
}
244
366
245
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
247
if (ret == NULL)
367
static const char * safer_gnutls_strerror(int value) {
368
const char *ret = gnutls_strerror(value); /* Spurious warning from
369
-Wunreachable-code */
370
if(ret == NULL)
248
371
ret = "(unknown)";
249
372
return ret;
250
373
}
251
374
375
/* GnuTLS log function callback */
252
376
static void debuggnutls(__attribute__((unused)) int level,
253
377
const char* string){
254
fprintf(stderr, "%s", string);
378
fprintf(stderr, "GnuTLS: %s", string);
255
379
}
256
380
257
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
258
gnutls_dh_params_t *dh_params){
259
const char *err;
381
static int init_gnutls_global(mandos_context *mc,
382
const char *pubkeyfilename,
383
const char *seckeyfilename){
260
384
int ret;
261
385
262
386
if(debug){
263
387
fprintf(stderr, "Initializing GnuTLS\n");
264
388
}
265
266
if ((ret = gnutls_global_init ())
267
!= GNUTLS_E_SUCCESS) {
268
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
389
390
ret = gnutls_global_init();
391
if(ret != GNUTLS_E_SUCCESS) {
392
fprintf(stderr, "GnuTLS global_init: %s\n",
393
safer_gnutls_strerror(ret));
269
394
return -1;
270
395
}
271
396
272
if (debug){
397
if(debug){
398
/* "Use a log level over 10 to enable all debugging options."
399
* - GnuTLS manual
400
*/
273
401
gnutls_global_set_log_level(11);
274
402
gnutls_global_set_log_function(debuggnutls);
275
403
}
276
404
277
/* openpgp credentials */
278
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
279
!= GNUTLS_E_SUCCESS) {
280
fprintf (stderr, "memory error: %s\n",
281
safer_gnutls_strerror(ret));
405
/* OpenPGP credentials */
406
gnutls_certificate_allocate_credentials(&mc->cred);
407
if(ret != GNUTLS_E_SUCCESS){
408
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
409
* from
410
* -Wunreachable-code
411
*/
412
safer_gnutls_strerror(ret));
413
gnutls_global_deinit();
282
414
return -1;
283
415
}
284
416
285
417
if(debug){
286
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
287
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
288
seckeyfile);
418
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
419
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
420
seckeyfilename);
289
421
}
290
422
291
423
ret = gnutls_certificate_set_openpgp_key_file
292
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
293
if (ret != GNUTLS_E_SUCCESS) {
294
fprintf
295
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
296
" '%s')\n",
297
ret, pubkeyfile, seckeyfile);
298
fprintf(stdout, "The Error is: %s\n",
299
safer_gnutls_strerror(ret));
300
return -1;
301
}
302
303
//GnuTLS server initialization
304
if ((ret = gnutls_dh_params_init(dh_params))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf (stderr, "Error in dh parameter initialization: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
311
if ((ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits))
312
!= GNUTLS_E_SUCCESS) {
313
fprintf (stderr, "Error in prime generation: %s\n",
314
safer_gnutls_strerror(ret));
315
return -1;
316
}
317
318
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
319
320
// GnuTLS session creation
321
if ((ret = gnutls_init(session, GNUTLS_SERVER))
322
!= GNUTLS_E_SUCCESS){
424
(mc->cred, pubkeyfilename, seckeyfilename,
425
GNUTLS_OPENPGP_FMT_BASE64);
426
if(ret != GNUTLS_E_SUCCESS) {
427
fprintf(stderr,
428
"Error[%d] while reading the OpenPGP key pair ('%s',"
429
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
fprintf(stderr, "The GnuTLS error is: %s\n",
431
safer_gnutls_strerror(ret));
432
goto globalfail;
433
}
434
435
/* GnuTLS server initialization */
436
ret = gnutls_dh_params_init(&mc->dh_params);
437
if(ret != GNUTLS_E_SUCCESS) {
438
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
439
" %s\n", safer_gnutls_strerror(ret));
440
goto globalfail;
441
}
442
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
443
if(ret != GNUTLS_E_SUCCESS) {
444
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
445
safer_gnutls_strerror(ret));
446
goto globalfail;
447
}
448
449
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
450
451
return 0;
452
453
globalfail:
454
455
gnutls_certificate_free_credentials(mc->cred);
456
gnutls_global_deinit();
457
gnutls_dh_params_deinit(mc->dh_params);
458
return -1;
459
}
460
461
static int init_gnutls_session(mandos_context *mc,
462
gnutls_session_t *session){
463
int ret;
464
/* GnuTLS session creation */
465
ret = gnutls_init(session, GNUTLS_SERVER);
466
if(ret != GNUTLS_E_SUCCESS){
323
467
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
324
468
safer_gnutls_strerror(ret));
325
469
}
326
470
327
if ((ret = gnutls_priority_set_direct(*session, mc->priority, &err))
328
!= GNUTLS_E_SUCCESS) {
329
fprintf(stderr, "Syntax error at: %s\n", err);
330
fprintf(stderr, "GnuTLS error: %s\n",
331
safer_gnutls_strerror(ret));
332
return -1;
471
{
472
const char *err;
473
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
474
if(ret != GNUTLS_E_SUCCESS) {
475
fprintf(stderr, "Syntax error at: %s\n", err);
476
fprintf(stderr, "GnuTLS error: %s\n",
477
safer_gnutls_strerror(ret));
478
gnutls_deinit(*session);
479
return -1;
480
}
333
481
}
334
482
335
if ((ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
336
mc->cred))
337
!= GNUTLS_E_SUCCESS) {
338
fprintf(stderr, "Error setting a credentials set: %s\n",
483
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
484
mc->cred);
485
if(ret != GNUTLS_E_SUCCESS) {
486
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
339
487
safer_gnutls_strerror(ret));
488
gnutls_deinit(*session);
340
489
return -1;
341
490
}
342
491
343
492
/* ignore client certificate if any. */
344
gnutls_certificate_server_set_request (*session,
345
GNUTLS_CERT_IGNORE);
493
gnutls_certificate_server_set_request(*session,
494
GNUTLS_CERT_IGNORE);
346
495
347
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
496
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
348
497
349
498
return 0;
350
499
}
351
500
501
/* Avahi log function callback */
352
502
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
353
503
__attribute__((unused)) const char *txt){}
354
504
505
/* Called when a Mandos server is found */
355
506
static int start_mandos_communication(const char *ip, uint16_t port,
356
507
AvahiIfIndex if_index,
357
508
mandos_context *mc){
358
509
int ret, tcp_sd;
359
struct sockaddr_in6 to;
510
ssize_t sret;
511
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
360
512
char *buffer = NULL;
361
513
char *decrypted_buffer;
362
514
size_t buffer_length = 0;
363
515
size_t buffer_capacity = 0;
364
516
ssize_t decrypted_buffer_size;
365
size_t written = 0;
517
size_t written;
366
518
int retval = 0;
367
519
char interface[IF_NAMESIZE];
368
520
gnutls_session_t session;
369
gnutls_dh_params_t dh_params;
521
522
ret = init_gnutls_session(mc, &session);
523
if(ret != 0){
524
return -1;
525
}
370
526
371
527
if(debug){
372
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
373
ip, port);
528
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
529
"\n", ip, port);
374
530
}
375
531
376
532
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
378
534
perror("socket");
379
535
return -1;
380
536
}
381
537
382
538
if(debug){
383
539
if(if_indextoname((unsigned int)if_index, interface) == NULL){
384
540
perror("if_indextoname");
387
543
fprintf(stderr, "Binding to interface %s\n", interface);
388
544
}
389
545
390
memset(&to,0,sizeof(to)); /* Spurious warning */
391
to.sin6_family = AF_INET6;
392
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
393
if (ret < 0 ){
546
memset(&to, 0, sizeof(to));
547
to.in6.sin6_family = AF_INET6;
548
/* It would be nice to have a way to detect if we were passed an
549
IPv4 address here. Now we assume an IPv6 address. */
550
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
551
if(ret < 0 ){
394
552
perror("inet_pton");
395
553
return -1;
396
554
}
398
556
fprintf(stderr, "Bad address: %s\n", ip);
399
557
return -1;
400
558
}
401
to.sin6_port = htons(port); /* Spurious warning */
559
to.in6.sin6_port = htons(port); /* Spurious warnings from
560
-Wconversion and
561
-Wunreachable-code */
402
562
403
to.sin6_scope_id = (uint32_t)if_index;
563
to.in6.sin6_scope_id = (uint32_t)if_index;
404
564
405
565
if(debug){
406
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
566
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
567
port);
407
568
char addrstr[INET6_ADDRSTRLEN] = "";
408
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
569
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
409
570
sizeof(addrstr)) == NULL){
410
571
perror("inet_ntop");
411
572
} else {
415
576
}
416
577
}
417
578
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
419
if (ret < 0){
579
ret = connect(tcp_sd, &to.in, sizeof(to));
580
if(ret < 0){
420
581
perror("connect");
421
582
return -1;
422
583
}
423
584
424
ret = initgnutls (mc, &session, &dh_params);
425
if (ret != 0){
426
retval = -1;
427
return -1;
585
const char *out = mandos_protocol_version;
586
written = 0;
587
while(true){
588
size_t out_size = strlen(out);
589
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
590
out_size - written));
591
if(ret == -1){
592
perror("write");
593
retval = -1;
594
goto mandos_end;
595
}
596
written += (size_t)ret;
597
if(written < out_size){
598
continue;
599
} else {
600
if(out == mandos_protocol_version){
601
written = 0;
602
out = "\r\n";
603
} else {
604
break;
605
}
606
}
428
607
}
429
608
430
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
431
432
609
if(debug){
433
610
fprintf(stderr, "Establishing TLS session with %s\n", ip);
434
611
}
435
612
436
ret = gnutls_handshake (session);
437
438
if (ret != GNUTLS_E_SUCCESS){
613
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
614
615
do{
616
ret = gnutls_handshake(session);
617
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
618
619
if(ret != GNUTLS_E_SUCCESS){
439
620
if(debug){
440
fprintf(stderr, "\n*** Handshake failed ***\n");
441
gnutls_perror (ret);
621
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
622
gnutls_perror(ret);
442
623
}
443
624
retval = -1;
444
goto exit;
625
goto mandos_end;
445
626
}
446
627
447
//Retrieve OpenPGP packet that contains the wanted password
628
/* Read OpenPGP packet that contains the wanted password */
448
629
449
630
if(debug){
450
631
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
451
632
ip);
452
633
}
453
634
454
635
while(true){
455
if (buffer_length + BUFFER_SIZE > buffer_capacity){
456
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
457
if (buffer == NULL){
458
perror("realloc");
459
goto exit;
460
}
461
buffer_capacity += BUFFER_SIZE;
636
buffer_capacity = adjustbuffer(&buffer, buffer_length,
637
buffer_capacity);
638
if(buffer_capacity == 0){
639
perror("adjustbuffer");
640
retval = -1;
641
goto mandos_end;
462
642
}
463
643
464
ret = gnutls_record_recv(session, buffer+buffer_length,
465
BUFFER_SIZE);
466
if (ret == 0){
644
sret = gnutls_record_recv(session, buffer+buffer_length,
645
BUFFER_SIZE);
646
if(sret == 0){
467
647
break;
468
648
}
469
if (ret < 0){
470
switch(ret){
649
if(sret < 0){
650
switch(sret){
471
651
case GNUTLS_E_INTERRUPTED:
472
652
case GNUTLS_E_AGAIN:
473
653
break;
474
654
case GNUTLS_E_REHANDSHAKE:
475
ret = gnutls_handshake (session);
476
if (ret < 0){
477
fprintf(stderr, "\n*** Handshake failed ***\n");
478
gnutls_perror (ret);
655
do{
656
ret = gnutls_handshake(session);
657
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
658
if(ret < 0){
659
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
660
gnutls_perror(ret);
479
661
retval = -1;
480
goto exit;
662
goto mandos_end;
481
663
}
482
664
break;
483
665
default:
484
666
fprintf(stderr, "Unknown error while reading data from"
485
" encrypted session with mandos server\n");
667
" encrypted session with Mandos server\n");
486
668
retval = -1;
487
gnutls_bye (session, GNUTLS_SHUT_RDWR);
488
goto exit;
669
gnutls_bye(session, GNUTLS_SHUT_RDWR);
670
goto mandos_end;
489
671
}
490
672
} else {
491
buffer_length += (size_t) ret;
673
buffer_length += (size_t) sret;
492
674
}
493
675
}
494
676
495
if (buffer_length > 0){
496
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
if(debug){
678
fprintf(stderr, "Closing TLS session\n");
679
}
680
681
gnutls_bye(session, GNUTLS_SHUT_RDWR);
682
683
if(buffer_length > 0){
684
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
497
685
buffer_length,
498
&decrypted_buffer,
499
keydir);
500
if (decrypted_buffer_size >= 0){
686
&decrypted_buffer);
687
if(decrypted_buffer_size >= 0){
688
written = 0;
501
689
while(written < (size_t) decrypted_buffer_size){
502
ret = (int)fwrite (decrypted_buffer + written, 1,
503
(size_t)decrypted_buffer_size - written,
504
stdout);
690
ret = (int)fwrite(decrypted_buffer + written, 1,
691
(size_t)decrypted_buffer_size - written,
692
stdout);
505
693
if(ret == 0 and ferror(stdout)){
506
694
if(debug){
507
695
fprintf(stderr, "Error writing encrypted data: %s\n",
516
704
} else {
517
705
retval = -1;
518
706
}
519
}
520
521
//shutdown procedure
522
523
if(debug){
524
fprintf(stderr, "Closing TLS session\n");
525
}
526
707
} else {
708
retval = -1;
709
}
710
711
/* Shutdown procedure */
712
713
mandos_end:
527
714
free(buffer);
528
gnutls_bye (session, GNUTLS_SHUT_RDWR);
529
exit:
530
close(tcp_sd);
531
gnutls_deinit (session);
532
gnutls_certificate_free_credentials (mc->cred);
533
gnutls_global_deinit ();
715
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
716
if(ret == -1){
717
perror("close");
718
}
719
gnutls_deinit(session);
534
720
return retval;
535
721
}
536
722
537
static void resolve_callback( AvahiSServiceResolver *r,
538
AvahiIfIndex interface,
539
AVAHI_GCC_UNUSED AvahiProtocol protocol,
540
AvahiResolverEvent event,
541
const char *name,
542
const char *type,
543
const char *domain,
544
const char *host_name,
545
const AvahiAddress *address,
546
uint16_t port,
547
AVAHI_GCC_UNUSED AvahiStringList *txt,
548
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
549
void* userdata) {
723
static void resolve_callback(AvahiSServiceResolver *r,
724
AvahiIfIndex interface,
725
AVAHI_GCC_UNUSED AvahiProtocol protocol,
726
AvahiResolverEvent event,
727
const char *name,
728
const char *type,
729
const char *domain,
730
const char *host_name,
731
const AvahiAddress *address,
732
uint16_t port,
733
AVAHI_GCC_UNUSED AvahiStringList *txt,
734
AVAHI_GCC_UNUSED AvahiLookupResultFlags
735
flags,
736
void* userdata) {
550
737
mandos_context *mc = userdata;
551
assert(r); /* Spurious warning */
738
assert(r);
552
739
553
740
/* Called whenever a service has been resolved successfully or
554
741
timed out */
555
742
556
switch (event) {
743
switch(event) {
557
744
default:
558
745
case AVAHI_RESOLVER_FAILURE:
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
746
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
747
" of type '%s' in domain '%s': %s\n", name, type, domain,
561
748
avahi_strerror(avahi_server_errno(mc->server)));
562
749
break;
563
750
566
753
char ip[AVAHI_ADDRESS_STR_MAX];
567
754
avahi_address_snprint(ip, sizeof(ip), address);
568
755
if(debug){
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
756
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
757
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
758
ip, (intmax_t)interface, port);
571
759
}
572
760
int ret = start_mandos_communication(ip, port, interface, mc);
573
if (ret == 0){
574
exit(EXIT_SUCCESS);
761
if(ret == 0){
762
avahi_simple_poll_quit(mc->simple_poll);
575
763
}
576
764
}
577
765
}
585
773
const char *name,
586
774
const char *type,
587
775
const char *domain,
588
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
776
AVAHI_GCC_UNUSED AvahiLookupResultFlags
777
flags,
589
778
void* userdata) {
590
779
mandos_context *mc = userdata;
591
assert(b); /* Spurious warning */
780
assert(b);
592
781
593
782
/* Called whenever a new services becomes available on the LAN or
594
783
is removed from the LAN */
595
784
596
switch (event) {
785
switch(event) {
597
786
default:
598
787
case AVAHI_BROWSER_FAILURE:
599
788
600
fprintf(stderr, "(Browser) %s\n",
789
fprintf(stderr, "(Avahi browser) %s\n",
601
790
avahi_strerror(avahi_server_errno(mc->server)));
602
791
avahi_simple_poll_quit(mc->simple_poll);
603
792
return;
604
793
605
794
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. */
795
/* We ignore the returned Avahi resolver object. In the callback
796
function we free it. If the Avahi server is terminated before
797
the callback function is called the Avahi server will free the
798
resolver for us. */
610
799
611
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
612
type, domain,
800
if(!(avahi_s_service_resolver_new(mc->server, interface,
801
protocol, name, type, domain,
613
802
AVAHI_PROTO_INET6, 0,
614
803
resolve_callback, mc)))
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(mc->server)));
804
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
805
name, avahi_strerror(avahi_server_errno(mc->server)));
617
806
break;
618
807
619
808
case AVAHI_BROWSER_REMOVE:
621
810
622
811
case AVAHI_BROWSER_ALL_FOR_NOW:
623
812
case AVAHI_BROWSER_CACHE_EXHAUSTED:
813
if(debug){
814
fprintf(stderr, "No Mandos server found, still searching...\n");
815
}
624
816
break;
625
817
}
626
818
}
627
819
628
/* Combines file name and path and returns the malloced new
629
string. some sane checks could/should be added */
630
static const char *combinepath(const char *first, const char *second){
631
size_t f_len = strlen(first);
632
size_t s_len = strlen(second);
633
char *tmp = malloc(f_len + s_len + 2);
634
if (tmp == NULL){
635
return NULL;
636
}
637
if(f_len > 0){
638
memcpy(tmp, first, f_len); /* Spurious warning */
639
}
640
tmp[f_len] = '/';
641
if(s_len > 0){
642
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
643
}
644
tmp[f_len + 1 + s_len] = '\0';
645
return tmp;
646
}
647
648
649
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
650
AvahiServerConfig config;
820
int main(int argc, char *argv[]){
651
821
AvahiSServiceBrowser *sb = NULL;
652
822
int error;
653
823
int ret;
654
int debug_int;
655
int returncode = EXIT_SUCCESS;
824
intmax_t tmpmax;
825
int numchars;
826
int exitcode = EXIT_SUCCESS;
656
827
const char *interface = "eth0";
657
828
struct ifreq network;
658
829
int sd;
830
uid_t uid;
831
gid_t gid;
659
832
char *connect_to = NULL;
833
char tempdir[] = "/tmp/mandosXXXXXX";
660
834
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
835
const char *seckey = PATHDIR "/" SECKEY;
836
const char *pubkey = PATHDIR "/" PUBKEY;
837
661
838
mandos_context mc = { .simple_poll = NULL, .server = NULL,
662
.dh_bits = 1024, .priority = "SECURE256"};
663
664
debug_int = debug ? 1 : 0;
665
while (true){
666
struct option long_options[] = {
667
{"debug", no_argument, &debug_int, 1},
668
{"connect", required_argument, NULL, 'c'},
669
{"interface", required_argument, NULL, 'i'},
670
{"keydir", required_argument, NULL, 'd'},
671
{"seckey", required_argument, NULL, 's'},
672
{"pubkey", required_argument, NULL, 'p'},
673
{"dh-bits", required_argument, NULL, 'D'},
674
{"priority", required_argument, NULL, 'P'},
675
{0, 0, 0, 0} };
676
677
int option_index = 0;
678
ret = getopt_long (argc, argv, "i:", long_options,
679
&option_index);
680
681
if (ret == -1){
682
break;
683
}
684
685
switch(ret){
686
case 0:
687
break;
688
case 'i':
689
interface = optarg;
690
break;
691
case 'c':
692
connect_to = optarg;
693
break;
694
case 'd':
695
keydir = optarg;
696
break;
697
case 'p':
698
pubkeyfile = optarg;
699
break;
700
case 's':
701
seckeyfile = optarg;
702
break;
703
case 'D':
704
errno = 0;
705
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
706
if (errno){
707
perror("strtol");
708
exit(EXIT_FAILURE);
709
}
710
break;
711
case 'P':
712
mc.priority = optarg;
713
break;
714
case '?':
715
default:
716
exit(EXIT_FAILURE);
717
}
718
}
719
debug = debug_int ? true : false;
720
721
pubkeyfile = combinepath(keydir, pubkeyfile);
722
if (pubkeyfile == NULL){
723
perror("combinepath");
724
returncode = EXIT_FAILURE;
725
goto exit;
726
}
727
728
seckeyfile = combinepath(keydir, seckeyfile);
729
if (seckeyfile == NULL){
730
perror("combinepath");
731
goto exit;
839
.dh_bits = 1024, .priority = "SECURE256"
840
":!CTYPE-X.509:+CTYPE-OPENPGP" };
841
bool gnutls_initalized = false;
842
bool gpgme_initalized = false;
843
844
{
845
struct argp_option options[] = {
846
{ .name = "debug", .key = 128,
847
.doc = "Debug mode", .group = 3 },
848
{ .name = "connect", .key = 'c',
849
.arg = "ADDRESS:PORT",
850
.doc = "Connect directly to a specific Mandos server",
851
.group = 1 },
852
{ .name = "interface", .key = 'i',
853
.arg = "NAME",
854
.doc = "Interface that will be used to search for Mandos"
855
" servers",
856
.group = 1 },
857
{ .name = "seckey", .key = 's',
858
.arg = "FILE",
859
.doc = "OpenPGP secret key file base name",
860
.group = 1 },
861
{ .name = "pubkey", .key = 'p',
862
.arg = "FILE",
863
.doc = "OpenPGP public key file base name",
864
.group = 2 },
865
{ .name = "dh-bits", .key = 129,
866
.arg = "BITS",
867
.doc = "Bit length of the prime number used in the"
868
" Diffie-Hellman key exchange",
869
.group = 2 },
870
{ .name = "priority", .key = 130,
871
.arg = "STRING",
872
.doc = "GnuTLS priority string for the TLS handshake",
873
.group = 1 },
874
{ .name = NULL }
875
};
876
877
error_t parse_opt(int key, char *arg,
878
struct argp_state *state) {
879
switch(key) {
880
case 128: /* --debug */
881
debug = true;
882
break;
883
case 'c': /* --connect */
884
connect_to = arg;
885
break;
886
case 'i': /* --interface */
887
interface = arg;
888
break;
889
case 's': /* --seckey */
890
seckey = arg;
891
break;
892
case 'p': /* --pubkey */
893
pubkey = arg;
894
break;
895
case 129: /* --dh-bits */
896
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
897
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
898
or arg[numchars] != '\0'){
899
fprintf(stderr, "Bad number of DH bits\n");
900
exit(EXIT_FAILURE);
901
}
902
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
903
break;
904
case 130: /* --priority */
905
mc.priority = arg;
906
break;
907
case ARGP_KEY_ARG:
908
argp_usage(state);
909
case ARGP_KEY_END:
910
break;
911
default:
912
return ARGP_ERR_UNKNOWN;
913
}
914
return 0;
915
}
916
917
struct argp argp = { .options = options, .parser = parse_opt,
918
.args_doc = "",
919
.doc = "Mandos client -- Get and decrypt"
920
" passwords from a Mandos server" };
921
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
922
if(ret == ARGP_ERR_UNKNOWN){
923
fprintf(stderr, "Unknown error while parsing arguments\n");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
}
928
929
/* If the interface is down, bring it up */
930
{
931
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
932
if(sd < 0) {
933
perror("socket");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
strcpy(network.ifr_name, interface);
938
ret = ioctl(sd, SIOCGIFFLAGS, &network);
939
if(ret == -1){
940
perror("ioctl SIOCGIFFLAGS");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
if((network.ifr_flags & IFF_UP) == 0){
945
network.ifr_flags |= IFF_UP;
946
ret = ioctl(sd, SIOCSIFFLAGS, &network);
947
if(ret == -1){
948
perror("ioctl SIOCSIFFLAGS");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
}
953
ret = (int)TEMP_FAILURE_RETRY(close(sd));
954
if(ret == -1){
955
perror("close");
956
}
957
}
958
959
uid = getuid();
960
gid = getgid();
961
962
ret = setuid(uid);
963
if(ret == -1){
964
perror("setuid");
965
}
966
967
setgid(gid);
968
if(ret == -1){
969
perror("setgid");
970
}
971
972
ret = init_gnutls_global(&mc, pubkey, seckey);
973
if(ret == -1){
974
fprintf(stderr, "init_gnutls_global failed\n");
975
exitcode = EXIT_FAILURE;
976
goto end;
977
} else {
978
gnutls_initalized = true;
979
}
980
981
if(mkdtemp(tempdir) == NULL){
982
perror("mkdtemp");
983
tempdir[0] = '\0';
984
goto end;
985
}
986
987
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
988
fprintf(stderr, "gpgme_initalized failed\n");
989
exitcode = EXIT_FAILURE;
990
goto end;
991
} else {
992
gpgme_initalized = true;
732
993
}
733
994
734
995
if_index = (AvahiIfIndex) if_nametoindex(interface);
743
1004
char *address = strrchr(connect_to, ':');
744
1005
if(address == NULL){
745
1006
fprintf(stderr, "No colon in address\n");
746
exit(EXIT_FAILURE);
747
}
748
errno = 0;
749
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
750
if(errno){
751
perror("Bad port number");
752
exit(EXIT_FAILURE);
753
}
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
uint16_t port;
1011
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1012
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1013
or address[numchars+1] != '\0'){
1014
fprintf(stderr, "Bad port number\n");
1015
exitcode = EXIT_FAILURE;
1016
goto end;
1017
}
1018
port = (uint16_t)tmpmax;
754
1019
*address = '\0';
755
1020
address = connect_to;
756
1021
ret = start_mandos_communication(address, port, if_index, &mc);
757
1022
if(ret < 0){
758
exit(EXIT_FAILURE);
1023
exitcode = EXIT_FAILURE;
759
1024
} else {
760
exit(EXIT_SUCCESS);
761
}
762
}
763
764
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
765
if(sd < 0) {
766
perror("socket");
767
returncode = EXIT_FAILURE;
768
goto exit;
769
}
770
strcpy(network.ifr_name, interface); /* Spurious warning */
771
ret = ioctl(sd, SIOCGIFFLAGS, &network);
772
if(ret == -1){
773
774
perror("ioctl SIOCGIFFLAGS");
775
returncode = EXIT_FAILURE;
776
goto exit;
777
}
778
if((network.ifr_flags & IFF_UP) == 0){
779
network.ifr_flags |= IFF_UP;
780
ret = ioctl(sd, SIOCSIFFLAGS, &network);
781
if(ret == -1){
782
perror("ioctl SIOCSIFFLAGS");
783
returncode = EXIT_FAILURE;
784
goto exit;
785
}
786
}
787
close(sd);
788
789
if (not debug){
1025
exitcode = EXIT_SUCCESS;
1026
}
1027
goto end;
1028
}
1029
1030
if(not debug){
790
1031
avahi_set_log_function(empty_log);
791
1032
}
792
1033
793
/* Initialize the psuedo-RNG */
1034
/* Initialize the pseudo-RNG for Avahi */
794
1035
srand((unsigned int) time(NULL));
795
796
/* Allocate main loop object */
797
if (!(mc.simple_poll = avahi_simple_poll_new())) {
798
fprintf(stderr, "Failed to create simple poll object.\n");
799
returncode = EXIT_FAILURE;
800
goto exit;
801
}
802
803
/* Do not publish any local records */
804
avahi_server_config_init(&config);
805
config.publish_hinfo = 0;
806
config.publish_addresses = 0;
807
config.publish_workstation = 0;
808
config.publish_domain = 0;
809
810
/* Allocate a new server */
811
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
812
&config, NULL, NULL, &error);
813
814
/* Free the configuration data */
815
avahi_server_config_free(&config);
816
817
/* Check if creating the server object succeeded */
818
if (!mc.server) {
819
fprintf(stderr, "Failed to create server: %s\n",
1036
1037
/* Allocate main Avahi loop object */
1038
mc.simple_poll = avahi_simple_poll_new();
1039
if(mc.simple_poll == NULL) {
1040
fprintf(stderr, "Avahi: Failed to create simple poll"
1041
" object.\n");
1042
exitcode = EXIT_FAILURE;
1043
goto end;
1044
}
1045
1046
{
1047
AvahiServerConfig config;
1048
/* Do not publish any local Zeroconf records */
1049
avahi_server_config_init(&config);
1050
config.publish_hinfo = 0;
1051
config.publish_addresses = 0;
1052
config.publish_workstation = 0;
1053
config.publish_domain = 0;
1054
1055
/* Allocate a new server */
1056
mc.server = avahi_server_new(avahi_simple_poll_get
1057
(mc.simple_poll), &config, NULL,
1058
NULL, &error);
1059
1060
/* Free the Avahi configuration data */
1061
avahi_server_config_free(&config);
1062
}
1063
1064
/* Check if creating the Avahi server object succeeded */
1065
if(mc.server == NULL) {
1066
fprintf(stderr, "Failed to create Avahi server: %s\n",
820
1067
avahi_strerror(error));
821
returncode = EXIT_FAILURE;
822
goto exit;
1068
exitcode = EXIT_FAILURE;
1069
goto end;
823
1070
}
824
1071
825
/* Create the service browser */
1072
/* Create the Avahi service browser */
826
1073
sb = avahi_s_service_browser_new(mc.server, if_index,
827
1074
AVAHI_PROTO_INET6,
828
1075
"_mandos._tcp", NULL, 0,
829
1076
browse_callback, &mc);
830
if (!sb) {
1077
if(sb == NULL) {
831
1078
fprintf(stderr, "Failed to create service browser: %s\n",
832
1079
avahi_strerror(avahi_server_errno(mc.server)));
833
returncode = EXIT_FAILURE;
834
goto exit;
1080
exitcode = EXIT_FAILURE;
1081
goto end;
835
1082
}
836
1083
837
1084
/* Run the main loop */
838
839
if (debug){
840
fprintf(stderr, "Starting avahi loop search\n");
1085
1086
if(debug){
1087
fprintf(stderr, "Starting Avahi loop search\n");
841
1088
}
842
1089
843
1090
avahi_simple_poll_loop(mc.simple_poll);
844
1091
845
exit:
846
847
if (debug){
1092
end:
1093
1094
if(debug){
848
1095
fprintf(stderr, "%s exiting\n", argv[0]);
849
1096
}
850
1097
851
1098
/* Cleanup things */
852
if (sb)
1099
if(sb != NULL)
853
1100
avahi_s_service_browser_free(sb);
854
1101
855
if (mc.server)
1102
if(mc.server != NULL)
856
1103
avahi_server_free(mc.server);
857
858
if (mc.simple_poll)
1104
1105
if(mc.simple_poll != NULL)
859
1106
avahi_simple_poll_free(mc.simple_poll);
860
free(pubkeyfile);
861
free(seckeyfile);
862
863
return returncode;
1107
1108
if(gnutls_initalized){
1109
gnutls_certificate_free_credentials(mc.cred);
1110
gnutls_global_deinit();
1111
gnutls_dh_params_deinit(mc.dh_params);
1112
}
1113
1114
if(gpgme_initalized){
1115
gpgme_release(mc.ctx);
1116
}
1117
1118
/* Removes the temp directory used by GPGME */
1119
if(tempdir[0] != '\0'){
1120
DIR *d;
1121
struct dirent *direntry;
1122
d = opendir(tempdir);
1123
if(d == NULL){
1124
if(errno != ENOENT){
1125
perror("opendir");
1126
}
1127
} else {
1128
while(true){
1129
direntry = readdir(d);
1130
if(direntry == NULL){
1131
break;
1132
}
1133
if(direntry->d_type == DT_REG){
1134
char *fullname = NULL;
1135
ret = asprintf(&fullname, "%s/%s", tempdir,
1136
direntry->d_name);
1137
if(ret < 0){
1138
perror("asprintf");
1139
continue;
1140
}
1141
ret = unlink(fullname);
1142
if(ret == -1){
1143
fprintf(stderr, "unlink(\"%s\"): %s",
1144
fullname, strerror(errno));
1145
}
1146
free(fullname);
1147
}
1148
}
1149
closedir(d);
1150
}
1151
ret = rmdir(tempdir);
1152
if(ret == -1 and errno != ENOENT){
1153
perror("rmdir");
1154
}
1155
}
1156
1157
return exitcode;
864
1158
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0