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- Committer: Björn Påhlsson
- Date: 2008-08-02 21:06:29 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 38.
- Revision ID: belorn@braxen-20080802210629-p9jc5515yufcg4ge
not working midwork...
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
35
34
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
41
#include <stdint.h> /* uint16_t, uint32_t */
42
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
46
#include <string.h> /* memset(), strcmp(), strlen(),
47
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* time() */
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
SIOCSIFFLAGS, if_indextoname(),
67
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
72
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
74
#include <argp.h> /* struct argp_option, error_t, struct
75
argp_state, struct argp,
76
argp_parse(), ARGP_KEY_ARG,
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
79
/* Avahi */
80
/* All Avahi types, constants and functions
81
Avahi*, avahi_*,
82
AVAHI_* */
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
83
43
#include <avahi-core/core.h>
84
44
#include <avahi-core/lookup.h>
85
45
#include <avahi-core/log.h>
87
47
#include <avahi-common/malloc.h>
88
48
#include <avahi-common/error.h>
89
49
90
/* GnuTLS */
91
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
92
functions:
93
gnutls_*
94
init_gnutls_session(),
95
GNUTLS_* */
96
#include <gnutls/openpgp.h>
97
/* gnutls_certificate_set_openpgp_key_file(),
98
GNUTLS_OPENPGP_FMT_BASE64 */
99
100
/* GPGME */
101
#include <gpgme.h> /* All GPGME types, constants and
102
functions:
103
gpgme_*
104
GPGME_PROTOCOL_OpenPGP,
105
GPG_ERR_NO_* */
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>
106
70
107
71
#define BUFFER_SIZE 256
72
#define DH_BITS 1024
108
73
109
#define PATHDIR "/conf/conf.d/mandos"
110
#define SECKEY "seckey.txt"
111
#define PUBKEY "pubkey.txt"
74
static const char *certdir = "/conf/conf.d/mandos";
75
static const char *certfile = "openpgp-client.txt";
76
static const char *certkey = "openpgp-client-key.txt";
112
77
113
78
bool debug = false;
114
static const char mandos_protocol_version[] = "1";
115
const char *argp_program_version = "mandos-client " VERSION;
116
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
117
79
118
/* Used for passing in values through the Avahi callback functions */
119
80
typedef struct {
120
81
AvahiSimplePoll *simple_poll;
121
82
AvahiServer *server;
122
83
gnutls_certificate_credentials_t cred;
123
84
unsigned int dh_bits;
124
gnutls_dh_params_t dh_params;
125
85
const char *priority;
86
} mandos_context;
87
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;
126
92
gpgme_ctx_t ctx;
127
} mandos_context;
128
129
/*
130
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
131
* "buffer_capacity" is how much is currently allocated,
132
* "buffer_length" is how much is already used.
133
*/
134
size_t adjustbuffer(char **buffer, size_t buffer_length,
135
size_t buffer_capacity){
136
if(buffer_length + BUFFER_SIZE > buffer_capacity){
137
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
138
if(buffer == NULL){
139
return 0;
140
}
141
buffer_capacity += BUFFER_SIZE;
142
}
143
return buffer_capacity;
144
}
145
146
/*
147
* Initialize GPGME.
148
*/
149
static bool init_gpgme(mandos_context *mc, const char *seckey,
150
const char *pubkey, const char *tempdir){
151
int ret;
152
93
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
153
97
gpgme_engine_info_t engine_info;
154
155
156
/*
157
* Helper function to insert pub and seckey to the enigne keyring.
158
*/
159
bool import_key(const char *filename){
160
int fd;
161
gpgme_data_t pgp_data;
162
163
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
164
if(fd == -1){
165
perror("open");
166
return false;
167
}
168
169
rc = gpgme_data_new_from_fd(&pgp_data, fd);
170
if(rc != GPG_ERR_NO_ERROR){
171
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
172
gpgme_strsource(rc), gpgme_strerror(rc));
173
return false;
174
}
175
176
rc = gpgme_op_import(mc->ctx, pgp_data);
177
if(rc != GPG_ERR_NO_ERROR){
178
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
179
gpgme_strsource(rc), gpgme_strerror(rc));
180
return false;
181
}
182
183
ret = (int)TEMP_FAILURE_RETRY(close(fd));
184
if(ret == -1){
185
perror("close");
186
}
187
gpgme_data_release(pgp_data);
188
return true;
189
}
190
191
if(debug){
192
fprintf(stderr, "Initialize gpgme\n");
98
99
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
193
101
}
194
102
195
103
/* Init GPGME */
196
104
gpgme_check_version(NULL);
197
105
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
198
if(rc != GPG_ERR_NO_ERROR){
106
if (rc != GPG_ERR_NO_ERROR){
199
107
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
200
108
gpgme_strsource(rc), gpgme_strerror(rc));
201
return false;
109
return -1;
202
110
}
203
111
204
/* Set GPGME home directory for the OpenPGP engine only */
205
rc = gpgme_get_engine_info(&engine_info);
206
if(rc != GPG_ERR_NO_ERROR){
112
/* Set GPGME home directory */
113
rc = gpgme_get_engine_info (&engine_info);
114
if (rc != GPG_ERR_NO_ERROR){
207
115
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
208
116
gpgme_strsource(rc), gpgme_strerror(rc));
209
return false;
117
return -1;
210
118
}
211
119
while(engine_info != NULL){
212
120
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
213
121
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
214
engine_info->file_name, tempdir);
122
engine_info->file_name, homedir);
215
123
break;
216
124
}
217
125
engine_info = engine_info->next;
218
126
}
219
127
if(engine_info == NULL){
220
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
221
return false;
222
}
223
224
/* Create new GPGME "context" */
225
rc = gpgme_new(&(mc->ctx));
226
if(rc != GPG_ERR_NO_ERROR){
227
fprintf(stderr, "bad gpgme_new: %s: %s\n",
228
gpgme_strsource(rc), gpgme_strerror(rc));
229
return false;
230
}
231
232
if(not import_key(pubkey) or not import_key(seckey)){
233
return false;
234
}
235
236
return true;
237
}
238
239
/*
240
* Decrypt OpenPGP data.
241
* Returns -1 on error
242
*/
243
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
244
const char *cryptotext,
245
size_t crypto_size,
246
char **plaintext){
247
gpgme_data_t dh_crypto, dh_plain;
248
gpgme_error_t rc;
249
ssize_t ret;
250
size_t plaintext_capacity = 0;
251
ssize_t plaintext_length = 0;
252
253
if(debug){
254
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
255
}
256
257
/* Create new GPGME data buffer from memory cryptotext */
258
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
259
0);
260
if(rc != GPG_ERR_NO_ERROR){
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){
261
135
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
262
136
gpgme_strsource(rc), gpgme_strerror(rc));
263
137
return -1;
265
139
266
140
/* Create new empty GPGME data buffer for the plaintext */
267
141
rc = gpgme_data_new(&dh_plain);
268
if(rc != GPG_ERR_NO_ERROR){
142
if (rc != GPG_ERR_NO_ERROR){
269
143
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
270
144
gpgme_strsource(rc), gpgme_strerror(rc));
271
gpgme_data_release(dh_crypto);
272
return -1;
273
}
274
275
/* Decrypt data from the cryptotext data buffer to the plaintext
276
data buffer */
277
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
278
if(rc != GPG_ERR_NO_ERROR){
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){
279
160
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
280
161
gpgme_strsource(rc), gpgme_strerror(rc));
281
plaintext_length = -1;
282
if(debug){
283
gpgme_decrypt_result_t result;
284
result = gpgme_op_decrypt_result(mc->ctx);
285
if(result == NULL){
286
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
287
} else {
288
fprintf(stderr, "Unsupported algorithm: %s\n",
289
result->unsupported_algorithm);
290
fprintf(stderr, "Wrong key usage: %u\n",
291
result->wrong_key_usage);
292
if(result->file_name != NULL){
293
fprintf(stderr, "File name: %s\n", result->file_name);
294
}
295
gpgme_recipient_t recipient;
296
recipient = result->recipients;
297
if(recipient){
298
while(recipient != NULL){
299
fprintf(stderr, "Public key algorithm: %s\n",
300
gpgme_pubkey_algo_name(recipient->pubkey_algo));
301
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
302
fprintf(stderr, "Secret key available: %s\n",
303
recipient->status == GPG_ERR_NO_SECKEY
304
? "No" : "Yes");
305
recipient = recipient->next;
306
}
162
return -1;
163
}
164
165
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;
307
193
}
308
194
}
309
195
}
310
goto decrypt_end;
311
196
}
312
197
313
if(debug){
314
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
315
}
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
316
200
317
201
/* Seek back to the beginning of the GPGME plaintext data buffer */
318
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
319
perror("gpgme_data_seek");
320
plaintext_length = -1;
321
goto decrypt_end;
202
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
perror("pgpme_data_seek");
322
204
}
323
205
324
*plaintext = NULL;
206
*new_packet = 0;
325
207
while(true){
326
plaintext_capacity = adjustbuffer(plaintext,
327
(size_t)plaintext_length,
328
plaintext_capacity);
329
if(plaintext_capacity == 0){
330
perror("adjustbuffer");
331
plaintext_length = -1;
332
goto decrypt_end;
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;
333
217
}
334
218
335
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
336
220
BUFFER_SIZE);
337
221
/* Print the data, if any */
338
if(ret == 0){
339
/* EOF */
222
if (ret == 0){
340
223
break;
341
224
}
342
225
if(ret < 0){
343
226
perror("gpgme_data_read");
344
plaintext_length = -1;
345
goto decrypt_end;
346
}
347
plaintext_length += ret;
348
}
349
350
if(debug){
351
fprintf(stderr, "Decrypted password is: ");
352
for(ssize_t i = 0; i < plaintext_length; i++){
353
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
354
}
355
fprintf(stderr, "\n");
356
}
357
358
decrypt_end:
359
360
/* Delete the GPGME cryptotext data buffer */
361
gpgme_data_release(dh_crypto);
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
/* } */
362
239
363
240
/* Delete the GPGME plaintext data buffer */
364
241
gpgme_data_release(dh_plain);
365
return plaintext_length;
242
return new_packet_length;
366
243
}
367
244
368
static const char * safer_gnutls_strerror(int value) {
369
const char *ret = gnutls_strerror(value); /* Spurious warning from
370
-Wunreachable-code */
371
if(ret == NULL)
245
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
247
if (ret == NULL)
372
248
ret = "(unknown)";
373
249
return ret;
374
250
}
375
251
376
/* GnuTLS log function callback */
377
252
static void debuggnutls(__attribute__((unused)) int level,
378
253
const char* string){
379
fprintf(stderr, "GnuTLS: %s", string);
254
fprintf(stderr, "%s", string);
380
255
}
381
256
382
static int init_gnutls_global(mandos_context *mc,
383
const char *pubkeyfilename,
384
const char *seckeyfilename){
257
static int initgnutls(mandos_context *mc){
258
const char *err;
385
259
int ret;
386
260
387
261
if(debug){
388
262
fprintf(stderr, "Initializing GnuTLS\n");
389
263
}
390
391
ret = gnutls_global_init();
392
if(ret != GNUTLS_E_SUCCESS) {
393
fprintf(stderr, "GnuTLS global_init: %s\n",
394
safer_gnutls_strerror(ret));
264
265
if ((ret = gnutls_global_init ())
266
!= GNUTLS_E_SUCCESS) {
267
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
395
268
return -1;
396
269
}
397
398
if(debug){
399
/* "Use a log level over 10 to enable all debugging options."
400
* - GnuTLS manual
401
*/
270
271
if (debug){
402
272
gnutls_global_set_log_level(11);
403
273
gnutls_global_set_log_function(debuggnutls);
404
274
}
405
275
406
/* OpenPGP credentials */
407
gnutls_certificate_allocate_credentials(&mc->cred);
408
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
410
* from
411
* -Wunreachable-code
412
*/
413
safer_gnutls_strerror(ret));
414
gnutls_global_deinit();
276
/* openpgp credentials */
277
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
278
!= GNUTLS_E_SUCCESS) {
279
fprintf (stderr, "memory error: %s\n",
280
safer_gnutls_strerror(ret));
415
281
return -1;
416
282
}
417
283
418
284
if(debug){
419
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
420
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
421
seckeyfilename);
285
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
286
" and keyfile %s as GnuTLS credentials\n", certfile,
287
certkey);
422
288
}
423
289
424
290
ret = gnutls_certificate_set_openpgp_key_file
425
(mc->cred, pubkeyfilename, seckeyfilename,
426
GNUTLS_OPENPGP_FMT_BASE64);
427
if(ret != GNUTLS_E_SUCCESS) {
428
fprintf(stderr,
429
"Error[%d] while reading the OpenPGP key pair ('%s',"
430
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
431
fprintf(stderr, "The GnuTLS error is: %s\n",
432
safer_gnutls_strerror(ret));
433
goto globalfail;
434
}
435
436
/* GnuTLS server initialization */
437
ret = gnutls_dh_params_init(&mc->dh_params);
438
if(ret != GNUTLS_E_SUCCESS) {
439
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
440
" %s\n", safer_gnutls_strerror(ret));
441
goto globalfail;
442
}
443
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
444
if(ret != GNUTLS_E_SUCCESS) {
445
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
446
safer_gnutls_strerror(ret));
447
goto globalfail;
448
}
449
450
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
451
452
return 0;
453
454
globalfail:
455
456
gnutls_certificate_free_credentials(mc->cred);
457
gnutls_global_deinit();
458
gnutls_dh_params_deinit(mc->dh_params);
459
return -1;
460
}
461
462
static int init_gnutls_session(mandos_context *mc,
463
gnutls_session_t *session){
464
int ret;
465
/* GnuTLS session creation */
466
ret = gnutls_init(session, GNUTLS_SERVER);
467
if(ret != GNUTLS_E_SUCCESS){
291
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
292
if (ret != GNUTLS_E_SUCCESS) {
293
fprintf
294
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
295
" '%s')\n",
296
ret, certfile, certkey);
297
fprintf(stdout, "The Error is: %s\n",
298
safer_gnutls_strerror(ret));
299
return -1;
300
}
301
302
//GnuTLS server initialization
303
if ((ret = gnutls_dh_params_init (&es->dh_params))
304
!= GNUTLS_E_SUCCESS) {
305
fprintf (stderr, "Error in dh parameter initialization: %s\n",
306
safer_gnutls_strerror(ret));
307
return -1;
308
}
309
310
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
311
!= GNUTLS_E_SUCCESS) {
312
fprintf (stderr, "Error in prime generation: %s\n",
313
safer_gnutls_strerror(ret));
314
return -1;
315
}
316
317
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
318
319
// GnuTLS session creation
320
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
321
!= GNUTLS_E_SUCCESS){
468
322
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
469
323
safer_gnutls_strerror(ret));
470
324
}
471
325
472
{
473
const char *err;
474
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
475
if(ret != GNUTLS_E_SUCCESS) {
476
fprintf(stderr, "Syntax error at: %s\n", err);
477
fprintf(stderr, "GnuTLS error: %s\n",
478
safer_gnutls_strerror(ret));
479
gnutls_deinit(*session);
480
return -1;
481
}
326
if ((ret = gnutls_priority_set_direct (es->session, mc->priority, &err))
327
!= GNUTLS_E_SUCCESS) {
328
fprintf(stderr, "Syntax error at: %s\n", err);
329
fprintf(stderr, "GnuTLS error: %s\n",
330
safer_gnutls_strerror(ret));
331
return -1;
482
332
}
483
333
484
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
485
mc->cred);
486
if(ret != GNUTLS_E_SUCCESS) {
487
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
334
if ((ret = gnutls_credentials_set
335
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
336
!= GNUTLS_E_SUCCESS) {
337
fprintf(stderr, "Error setting a credentials set: %s\n",
488
338
safer_gnutls_strerror(ret));
489
gnutls_deinit(*session);
490
339
return -1;
491
340
}
492
341
493
342
/* ignore client certificate if any. */
494
gnutls_certificate_server_set_request(*session,
495
GNUTLS_CERT_IGNORE);
343
gnutls_certificate_server_set_request (es->session,
344
GNUTLS_CERT_IGNORE);
496
345
497
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
346
gnutls_dh_set_prime_bits (es->session, DH_BITS);
498
347
499
348
return 0;
500
349
}
501
350
502
/* Avahi log function callback */
503
351
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
504
352
__attribute__((unused)) const char *txt){}
505
353
506
/* Called when a Mandos server is found */
507
354
static int start_mandos_communication(const char *ip, uint16_t port,
508
355
AvahiIfIndex if_index,
509
356
mandos_context *mc){
510
357
int ret, tcp_sd;
511
ssize_t sret;
512
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
358
struct sockaddr_in6 to;
359
encrypted_session es;
513
360
char *buffer = NULL;
514
361
char *decrypted_buffer;
515
362
size_t buffer_length = 0;
516
363
size_t buffer_capacity = 0;
517
364
ssize_t decrypted_buffer_size;
518
size_t written;
365
size_t written = 0;
519
366
int retval = 0;
520
367
char interface[IF_NAMESIZE];
521
gnutls_session_t session;
522
523
ret = init_gnutls_session(mc, &session);
524
if(ret != 0){
525
return -1;
526
}
527
368
528
369
if(debug){
529
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
530
"\n", ip, port);
370
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
371
ip, port);
531
372
}
532
373
533
374
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
535
376
perror("socket");
536
377
return -1;
537
378
}
538
379
539
380
if(debug){
540
381
if(if_indextoname((unsigned int)if_index, interface) == NULL){
541
perror("if_indextoname");
382
if(debug){
383
perror("if_indextoname");
384
}
542
385
return -1;
543
386
}
387
544
388
fprintf(stderr, "Binding to interface %s\n", interface);
545
389
}
546
390
547
memset(&to, 0, sizeof(to));
548
to.in6.sin6_family = AF_INET6;
549
/* It would be nice to have a way to detect if we were passed an
550
IPv4 address here. Now we assume an IPv6 address. */
551
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
552
if(ret < 0 ){
391
memset(&to,0,sizeof(to)); /* Spurious warning */
392
to.sin6_family = AF_INET6;
393
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
394
if (ret < 0 ){
553
395
perror("inet_pton");
554
396
return -1;
555
}
397
}
556
398
if(ret == 0){
557
399
fprintf(stderr, "Bad address: %s\n", ip);
558
400
return -1;
559
401
}
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
561
-Wconversion and
562
-Wunreachable-code */
402
to.sin6_port = htons(port); /* Spurious warning */
563
403
564
to.in6.sin6_scope_id = (uint32_t)if_index;
404
to.sin6_scope_id = (uint32_t)if_index;
565
405
566
406
if(debug){
567
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
568
port);
569
char addrstr[INET6_ADDRSTRLEN] = "";
570
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
571
sizeof(addrstr)) == NULL){
572
perror("inet_ntop");
573
} else {
574
if(strcmp(addrstr, ip) != 0){
575
fprintf(stderr, "Canonical address form: %s\n", addrstr);
576
}
577
}
407
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
408
/* char addrstr[INET6_ADDRSTRLEN]; */
409
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
410
/* sizeof(addrstr)) == NULL){ */
411
/* perror("inet_ntop"); */
412
/* } else { */
413
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
414
/* addrstr, ntohs(to.sin6_port)); */
415
/* } */
578
416
}
579
417
580
ret = connect(tcp_sd, &to.in, sizeof(to));
581
if(ret < 0){
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
419
if (ret < 0){
582
420
perror("connect");
583
421
return -1;
584
422
}
585
423
586
const char *out = mandos_protocol_version;
587
written = 0;
588
while(true){
589
size_t out_size = strlen(out);
590
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
591
out_size - written));
592
if(ret == -1){
593
perror("write");
594
retval = -1;
595
goto mandos_end;
596
}
597
written += (size_t)ret;
598
if(written < out_size){
599
continue;
600
} else {
601
if(out == mandos_protocol_version){
602
written = 0;
603
out = "\r\n";
604
} else {
605
break;
606
}
607
}
424
ret = initgnutls (&es);
425
if (ret != 0){
426
retval = -1;
427
return -1;
608
428
}
609
429
430
gnutls_transport_set_ptr (es.session,
431
(gnutls_transport_ptr_t) tcp_sd);
432
610
433
if(debug){
611
434
fprintf(stderr, "Establishing TLS session with %s\n", ip);
612
435
}
613
436
614
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
615
616
do{
617
ret = gnutls_handshake(session);
618
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
619
620
if(ret != GNUTLS_E_SUCCESS){
437
ret = gnutls_handshake (es.session);
438
439
if (ret != GNUTLS_E_SUCCESS){
621
440
if(debug){
622
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
623
gnutls_perror(ret);
441
fprintf(stderr, "\n*** Handshake failed ***\n");
442
gnutls_perror (ret);
624
443
}
625
444
retval = -1;
626
goto mandos_end;
445
goto exit;
627
446
}
628
447
629
/* Read OpenPGP packet that contains the wanted password */
448
//Retrieve OpenPGP packet that contains the wanted password
630
449
631
450
if(debug){
632
451
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
633
452
ip);
634
453
}
635
454
636
455
while(true){
637
buffer_capacity = adjustbuffer(&buffer, buffer_length,
638
buffer_capacity);
639
if(buffer_capacity == 0){
640
perror("adjustbuffer");
641
retval = -1;
642
goto mandos_end;
456
if (buffer_length + BUFFER_SIZE > buffer_capacity){
457
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
458
if (buffer == NULL){
459
perror("realloc");
460
goto exit;
461
}
462
buffer_capacity += BUFFER_SIZE;
643
463
}
644
464
645
sret = gnutls_record_recv(session, buffer+buffer_length,
646
BUFFER_SIZE);
647
if(sret == 0){
465
ret = gnutls_record_recv
466
(es.session, buffer+buffer_length, BUFFER_SIZE);
467
if (ret == 0){
648
468
break;
649
469
}
650
if(sret < 0){
651
switch(sret){
470
if (ret < 0){
471
switch(ret){
652
472
case GNUTLS_E_INTERRUPTED:
653
473
case GNUTLS_E_AGAIN:
654
474
break;
655
475
case GNUTLS_E_REHANDSHAKE:
656
do{
657
ret = gnutls_handshake(session);
658
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
659
if(ret < 0){
660
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
661
gnutls_perror(ret);
476
ret = gnutls_handshake (es.session);
477
if (ret < 0){
478
fprintf(stderr, "\n*** Handshake failed ***\n");
479
gnutls_perror (ret);
662
480
retval = -1;
663
goto mandos_end;
481
goto exit;
664
482
}
665
483
break;
666
484
default:
667
485
fprintf(stderr, "Unknown error while reading data from"
668
" encrypted session with Mandos server\n");
486
" encrypted session with mandos server\n");
669
487
retval = -1;
670
gnutls_bye(session, GNUTLS_SHUT_RDWR);
671
goto mandos_end;
488
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
489
goto exit;
672
490
}
673
491
} else {
674
buffer_length += (size_t) sret;
492
buffer_length += (size_t) ret;
675
493
}
676
494
}
677
495
678
if(debug){
679
fprintf(stderr, "Closing TLS session\n");
680
}
681
682
gnutls_bye(session, GNUTLS_SHUT_RDWR);
683
684
if(buffer_length > 0){
685
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
496
if (buffer_length > 0){
497
decrypted_buffer_size = pgp_packet_decrypt(buffer,
686
498
buffer_length,
687
&decrypted_buffer);
688
if(decrypted_buffer_size >= 0){
689
written = 0;
499
&decrypted_buffer,
500
certdir);
501
if (decrypted_buffer_size >= 0){
690
502
while(written < (size_t) decrypted_buffer_size){
691
ret = (int)fwrite(decrypted_buffer + written, 1,
692
(size_t)decrypted_buffer_size - written,
693
stdout);
503
ret = (int)fwrite (decrypted_buffer + written, 1,
504
(size_t)decrypted_buffer_size - written,
505
stdout);
694
506
if(ret == 0 and ferror(stdout)){
695
507
if(debug){
696
508
fprintf(stderr, "Error writing encrypted data: %s\n",
705
517
} else {
706
518
retval = -1;
707
519
}
708
} else {
709
retval = -1;
710
}
711
712
/* Shutdown procedure */
713
714
mandos_end:
520
}
521
522
//shutdown procedure
523
524
if(debug){
525
fprintf(stderr, "Closing TLS session\n");
526
}
527
715
528
free(buffer);
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
717
if(ret == -1){
718
perror("close");
719
}
720
gnutls_deinit(session);
529
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
530
exit:
531
close(tcp_sd);
532
gnutls_deinit (es.session);
533
gnutls_certificate_free_credentials (es.cred);
534
gnutls_global_deinit ();
721
535
return retval;
722
536
}
723
537
724
static void resolve_callback(AvahiSServiceResolver *r,
725
AvahiIfIndex interface,
726
AVAHI_GCC_UNUSED AvahiProtocol protocol,
727
AvahiResolverEvent event,
728
const char *name,
729
const char *type,
730
const char *domain,
731
const char *host_name,
732
const AvahiAddress *address,
733
uint16_t port,
734
AVAHI_GCC_UNUSED AvahiStringList *txt,
735
AVAHI_GCC_UNUSED AvahiLookupResultFlags
736
flags,
737
void* userdata) {
538
static void resolve_callback( AvahiSServiceResolver *r,
539
AvahiIfIndex interface,
540
AVAHI_GCC_UNUSED AvahiProtocol protocol,
541
AvahiResolverEvent event,
542
const char *name,
543
const char *type,
544
const char *domain,
545
const char *host_name,
546
const AvahiAddress *address,
547
uint16_t port,
548
AVAHI_GCC_UNUSED AvahiStringList *txt,
549
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
550
AVAHI_GCC_UNUSED void* userdata) {
738
551
mandos_context *mc = userdata;
739
assert(r);
552
assert(r); /* Spurious warning */
740
553
741
554
/* Called whenever a service has been resolved successfully or
742
555
timed out */
743
556
744
switch(event) {
557
switch (event) {
745
558
default:
746
559
case AVAHI_RESOLVER_FAILURE:
747
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
748
" of type '%s' in domain '%s': %s\n", name, type, domain,
560
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
561
" type '%s' in domain '%s': %s\n", name, type, domain,
749
562
avahi_strerror(avahi_server_errno(mc->server)));
750
563
break;
751
564
754
567
char ip[AVAHI_ADDRESS_STR_MAX];
755
568
avahi_address_snprint(ip, sizeof(ip), address);
756
569
if(debug){
757
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
758
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
759
ip, (intmax_t)interface, port);
570
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
571
" port %d\n", name, host_name, ip, port);
760
572
}
761
573
int ret = start_mandos_communication(ip, port, interface, mc);
762
if(ret == 0){
763
avahi_simple_poll_quit(mc->simple_poll);
574
if (ret == 0){
575
exit(EXIT_SUCCESS);
764
576
}
765
577
}
766
578
}
774
586
const char *name,
775
587
const char *type,
776
588
const char *domain,
777
AVAHI_GCC_UNUSED AvahiLookupResultFlags
778
flags,
589
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
779
590
void* userdata) {
780
591
mandos_context *mc = userdata;
781
assert(b);
592
assert(b); /* Spurious warning */
782
593
783
594
/* Called whenever a new services becomes available on the LAN or
784
595
is removed from the LAN */
785
596
786
switch(event) {
597
switch (event) {
787
598
default:
788
599
case AVAHI_BROWSER_FAILURE:
789
790
fprintf(stderr, "(Avahi browser) %s\n",
600
601
fprintf(stderr, "(Browser) %s\n",
791
602
avahi_strerror(avahi_server_errno(mc->server)));
792
603
avahi_simple_poll_quit(mc->simple_poll);
793
604
return;
794
605
795
606
case AVAHI_BROWSER_NEW:
796
/* We ignore the returned Avahi resolver object. In the callback
797
function we free it. If the Avahi server is terminated before
798
the callback function is called the Avahi server will free the
799
resolver for us. */
800
801
if(!(avahi_s_service_resolver_new(mc->server, interface,
802
protocol, name, type, domain,
607
/* We ignore the returned resolver object. In the callback
608
function we free it. If the server is terminated before
609
the callback function is called the server will free
610
the resolver for us. */
611
612
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
613
type, domain,
803
614
AVAHI_PROTO_INET6, 0,
804
615
resolve_callback, mc)))
805
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
806
name, avahi_strerror(avahi_server_errno(mc->server)));
616
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
617
avahi_strerror(avahi_server_errno(s)));
807
618
break;
808
619
809
620
case AVAHI_BROWSER_REMOVE:
810
621
break;
811
622
812
623
case AVAHI_BROWSER_ALL_FOR_NOW:
813
624
case AVAHI_BROWSER_CACHE_EXHAUSTED:
814
if(debug){
815
fprintf(stderr, "No Mandos server found, still searching...\n");
816
}
817
625
break;
818
626
}
819
627
}
820
628
821
int main(int argc, char *argv[]){
629
/* Combines file name and path and returns the malloced new
630
string. some sane checks could/should be added */
631
static const char *combinepath(const char *first, const char *second){
632
size_t f_len = strlen(first);
633
size_t s_len = strlen(second);
634
char *tmp = malloc(f_len + s_len + 2);
635
if (tmp == NULL){
636
return NULL;
637
}
638
if(f_len > 0){
639
memcpy(tmp, first, f_len);
640
}
641
tmp[f_len] = '/';
642
if(s_len > 0){
643
memcpy(tmp + f_len + 1, second, s_len);
644
}
645
tmp[f_len + 1 + s_len] = '\0';
646
return tmp;
647
}
648
649
650
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
651
AvahiServerConfig config;
822
652
AvahiSServiceBrowser *sb = NULL;
823
653
int error;
824
654
int ret;
825
intmax_t tmpmax;
826
int numchars;
827
int exitcode = EXIT_SUCCESS;
655
int returncode = EXIT_SUCCESS;
828
656
const char *interface = "eth0";
829
657
struct ifreq network;
830
658
int sd;
831
uid_t uid;
832
gid_t gid;
833
659
char *connect_to = NULL;
834
char tempdir[] = "/tmp/mandosXXXXXX";
835
660
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
836
const char *seckey = PATHDIR "/" SECKEY;
837
const char *pubkey = PATHDIR "/" PUBKEY;
838
839
661
mandos_context mc = { .simple_poll = NULL, .server = NULL,
840
.dh_bits = 1024, .priority = "SECURE256"
841
":!CTYPE-X.509:+CTYPE-OPENPGP" };
842
bool gnutls_initialized = false;
843
bool gpgme_initialized = false;
662
.dh_bits = 2048, .priority = "SECURE256"};
844
663
845
{
846
struct argp_option options[] = {
847
{ .name = "debug", .key = 128,
848
.doc = "Debug mode", .group = 3 },
849
{ .name = "connect", .key = 'c',
850
.arg = "ADDRESS:PORT",
851
.doc = "Connect directly to a specific Mandos server",
852
.group = 1 },
853
{ .name = "interface", .key = 'i',
854
.arg = "NAME",
855
.doc = "Interface that will be used to search for Mandos"
856
" servers",
857
.group = 1 },
858
{ .name = "seckey", .key = 's',
859
.arg = "FILE",
860
.doc = "OpenPGP secret key file base name",
861
.group = 1 },
862
{ .name = "pubkey", .key = 'p',
863
.arg = "FILE",
864
.doc = "OpenPGP public key file base name",
865
.group = 2 },
866
{ .name = "dh-bits", .key = 129,
867
.arg = "BITS",
868
.doc = "Bit length of the prime number used in the"
869
" Diffie-Hellman key exchange",
870
.group = 2 },
871
{ .name = "priority", .key = 130,
872
.arg = "STRING",
873
.doc = "GnuTLS priority string for the TLS handshake",
874
.group = 1 },
875
{ .name = NULL }
876
};
877
878
error_t parse_opt(int key, char *arg,
879
struct argp_state *state) {
880
switch(key) {
881
case 128: /* --debug */
882
debug = true;
883
break;
884
case 'c': /* --connect */
885
connect_to = arg;
886
break;
887
case 'i': /* --interface */
888
interface = arg;
889
break;
890
case 's': /* --seckey */
891
seckey = arg;
892
break;
893
case 'p': /* --pubkey */
894
pubkey = arg;
895
break;
896
case 129: /* --dh-bits */
897
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
898
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
899
or arg[numchars] != '\0'){
900
fprintf(stderr, "Bad number of DH bits\n");
664
while (true){
665
static struct option long_options[] = {
666
{"debug", no_argument, (int *)&debug, 1},
667
{"connect", required_argument, 0, 'C'},
668
{"interface", required_argument, 0, 'i'},
669
{"certdir", required_argument, 0, 'd'},
670
{"certkey", required_argument, 0, 'c'},
671
{"certfile", required_argument, 0, 'k'},
672
{"dh_bits", required_argument, 0, 'D'},
673
{"priority", required_argument, 0, 'p'},
674
{0, 0, 0, 0} };
675
676
int option_index = 0;
677
ret = getopt_long (argc, argv, "i:", long_options,
678
&option_index);
679
680
if (ret == -1){
681
break;
682
}
683
684
switch(ret){
685
case 0:
686
break;
687
case 'i':
688
interface = optarg;
689
break;
690
case 'C':
691
connect_to = optarg;
692
break;
693
case 'd':
694
certdir = optarg;
695
break;
696
case 'c':
697
certfile = optarg;
698
break;
699
case 'k':
700
certkey = optarg;
701
break;
702
case 'D':
703
{
704
long int tmp;
705
errno = 0;
706
tmp = strtol(optarg, NULL, 10);
707
if (errno == ERANGE){
708
perror("strtol");
901
709
exit(EXIT_FAILURE);
902
710
}
903
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
904
break;
905
case 130: /* --priority */
906
mc.priority = arg;
907
break;
908
case ARGP_KEY_ARG:
909
argp_usage(state);
910
case ARGP_KEY_END:
911
break;
912
default:
913
return ARGP_ERR_UNKNOWN;
914
}
915
return 0;
916
}
917
918
struct argp argp = { .options = options, .parser = parse_opt,
919
.args_doc = "",
920
.doc = "Mandos client -- Get and decrypt"
921
" passwords from a Mandos server" };
922
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
923
if(ret == ARGP_ERR_UNKNOWN){
924
fprintf(stderr, "Unknown error while parsing arguments\n");
925
exitcode = EXIT_FAILURE;
926
goto end;
927
}
928
}
929
930
/* If the interface is down, bring it up */
931
{
932
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
933
if(sd < 0) {
934
perror("socket");
935
exitcode = EXIT_FAILURE;
936
goto end;
937
}
938
strcpy(network.ifr_name, interface);
939
ret = ioctl(sd, SIOCGIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCGIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
if((network.ifr_flags & IFF_UP) == 0){
946
network.ifr_flags |= IFF_UP;
947
ret = ioctl(sd, SIOCSIFFLAGS, &network);
948
if(ret == -1){
949
perror("ioctl SIOCSIFFLAGS");
950
exitcode = EXIT_FAILURE;
951
goto end;
952
}
953
}
954
ret = (int)TEMP_FAILURE_RETRY(close(sd));
955
if(ret == -1){
956
perror("close");
957
}
958
}
959
960
uid = getuid();
961
gid = getgid();
962
963
ret = setuid(uid);
964
if(ret == -1){
965
perror("setuid");
966
}
967
968
setgid(gid);
969
if(ret == -1){
970
perror("setgid");
971
}
972
973
ret = init_gnutls_global(&mc, pubkey, seckey);
974
if(ret == -1){
975
fprintf(stderr, "init_gnutls_global failed\n");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
} else {
979
gnutls_initialized = true;
980
}
981
982
if(mkdtemp(tempdir) == NULL){
983
perror("mkdtemp");
984
tempdir[0] = '\0';
985
goto end;
986
}
987
988
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
989
fprintf(stderr, "init_gpgme failed\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
} else {
993
gpgme_initialized = true;
711
mc.dh_bits = tmp;
712
}
713
break;
714
case 'p':
715
mc.priority = optarg;
716
break;
717
default:
718
exit(EXIT_FAILURE);
719
}
720
}
721
722
certfile = combinepath(certdir, certfile);
723
if (certfile == NULL){
724
perror("combinepath");
725
returncode = EXIT_FAILURE;
726
goto exit;
727
}
728
729
certkey = combinepath(certdir, certkey);
730
if (certkey == NULL){
731
perror("combinepath");
732
returncode = EXIT_FAILURE;
733
goto exit;
994
734
}
995
735
996
736
if_index = (AvahiIfIndex) if_nametoindex(interface);
1005
745
char *address = strrchr(connect_to, ':');
1006
746
if(address == NULL){
1007
747
fprintf(stderr, "No colon in address\n");
1008
exitcode = EXIT_FAILURE;
1009
goto end;
1010
}
1011
uint16_t port;
1012
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1013
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1014
or address[numchars+1] != '\0'){
1015
fprintf(stderr, "Bad port number\n");
1016
exitcode = EXIT_FAILURE;
1017
goto end;
1018
}
1019
port = (uint16_t)tmpmax;
748
exit(EXIT_FAILURE);
749
}
750
errno = 0;
751
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
752
if(errno){
753
perror("Bad port number");
754
exit(EXIT_FAILURE);
755
}
1020
756
*address = '\0';
1021
757
address = connect_to;
1022
ret = start_mandos_communication(address, port, if_index, &mc);
758
ret = start_mandos_communication(address, port, if_index);
1023
759
if(ret < 0){
1024
exitcode = EXIT_FAILURE;
760
exit(EXIT_FAILURE);
1025
761
} else {
1026
exitcode = EXIT_SUCCESS;
1027
}
1028
goto end;
1029
}
1030
1031
if(not debug){
762
exit(EXIT_SUCCESS);
763
}
764
}
765
766
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
767
if(sd < 0) {
768
perror("socket");
769
returncode = EXIT_FAILURE;
770
goto exit;
771
}
772
strcpy(network.ifr_name, interface);
773
ret = ioctl(sd, SIOCGIFFLAGS, &network);
774
if(ret == -1){
775
776
perror("ioctl SIOCGIFFLAGS");
777
returncode = EXIT_FAILURE;
778
goto exit;
779
}
780
if((network.ifr_flags & IFF_UP) == 0){
781
network.ifr_flags |= IFF_UP;
782
ret = ioctl(sd, SIOCSIFFLAGS, &network);
783
if(ret == -1){
784
perror("ioctl SIOCSIFFLAGS");
785
returncode = EXIT_FAILURE;
786
goto exit;
787
}
788
}
789
close(sd);
790
791
if (not debug){
1032
792
avahi_set_log_function(empty_log);
1033
793
}
1034
794
1035
/* Initialize the pseudo-RNG for Avahi */
795
/* Initialize the psuedo-RNG */
1036
796
srand((unsigned int) time(NULL));
1037
1038
/* Allocate main Avahi loop object */
1039
mc.simple_poll = avahi_simple_poll_new();
1040
if(mc.simple_poll == NULL) {
1041
fprintf(stderr, "Avahi: Failed to create simple poll"
1042
" object.\n");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
1047
{
1048
AvahiServerConfig config;
1049
/* Do not publish any local Zeroconf records */
1050
avahi_server_config_init(&config);
1051
config.publish_hinfo = 0;
1052
config.publish_addresses = 0;
1053
config.publish_workstation = 0;
1054
config.publish_domain = 0;
1055
1056
/* Allocate a new server */
1057
mc.server = avahi_server_new(avahi_simple_poll_get
1058
(mc.simple_poll), &config, NULL,
1059
NULL, &error);
1060
1061
/* Free the Avahi configuration data */
1062
avahi_server_config_free(&config);
1063
}
1064
1065
/* Check if creating the Avahi server object succeeded */
1066
if(mc.server == NULL) {
1067
fprintf(stderr, "Failed to create Avahi server: %s\n",
797
798
/* Allocate main loop object */
799
if (!(mc.simple_poll = avahi_simple_poll_new())) {
800
fprintf(stderr, "Failed to create simple poll object.\n");
801
returncode = EXIT_FAILURE;
802
goto exit;
803
}
804
805
/* Do not publish any local records */
806
avahi_server_config_init(&config);
807
config.publish_hinfo = 0;
808
config.publish_addresses = 0;
809
config.publish_workstation = 0;
810
config.publish_domain = 0;
811
812
/* Allocate a new server */
813
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
814
&config, NULL, NULL, &error);
815
816
/* Free the configuration data */
817
avahi_server_config_free(&config);
818
819
/* Check if creating the server object succeeded */
820
if (!mc.server) {
821
fprintf(stderr, "Failed to create server: %s\n",
1068
822
avahi_strerror(error));
1069
exitcode = EXIT_FAILURE;
1070
goto end;
823
returncode = EXIT_FAILURE;
824
goto exit;
1071
825
}
1072
826
1073
/* Create the Avahi service browser */
827
/* Create the service browser */
1074
828
sb = avahi_s_service_browser_new(mc.server, if_index,
1075
829
AVAHI_PROTO_INET6,
1076
830
"_mandos._tcp", NULL, 0,
1077
831
browse_callback, &mc);
1078
if(sb == NULL) {
832
if (!sb) {
1079
833
fprintf(stderr, "Failed to create service browser: %s\n",
1080
834
avahi_strerror(avahi_server_errno(mc.server)));
1081
exitcode = EXIT_FAILURE;
1082
goto end;
835
returncode = EXIT_FAILURE;
836
goto exit;
1083
837
}
1084
838
1085
839
/* Run the main loop */
1086
1087
if(debug){
1088
fprintf(stderr, "Starting Avahi loop search\n");
840
841
if (debug){
842
fprintf(stderr, "Starting avahi loop search\n");
1089
843
}
1090
844
1091
avahi_simple_poll_loop(mc.simple_poll);
1092
1093
end:
1094
1095
if(debug){
845
avahi_simple_poll_loop(simple_poll);
846
847
exit:
848
849
if (debug){
1096
850
fprintf(stderr, "%s exiting\n", argv[0]);
1097
851
}
1098
852
1099
853
/* Cleanup things */
1100
if(sb != NULL)
854
if (sb)
1101
855
avahi_s_service_browser_free(sb);
1102
856
1103
if(mc.server != NULL)
857
if (mc.server)
1104
858
avahi_server_free(mc.server);
1105
1106
if(mc.simple_poll != NULL)
1107
avahi_simple_poll_free(mc.simple_poll);
1108
1109
if(gnutls_initialized){
1110
gnutls_certificate_free_credentials(mc.cred);
1111
gnutls_global_deinit();
1112
gnutls_dh_params_deinit(mc.dh_params);
1113
}
1114
1115
if(gpgme_initialized){
1116
gpgme_release(mc.ctx);
1117
}
1118
1119
/* Removes the temp directory used by GPGME */
1120
if(tempdir[0] != '\0'){
1121
DIR *d;
1122
struct dirent *direntry;
1123
d = opendir(tempdir);
1124
if(d == NULL){
1125
if(errno != ENOENT){
1126
perror("opendir");
1127
}
1128
} else {
1129
while(true){
1130
direntry = readdir(d);
1131
if(direntry == NULL){
1132
break;
1133
}
1134
/* Skip "." and ".." */
1135
if(direntry->d_name[0] == '.'
1136
and (direntry->d_name[1] == '\0'
1137
or (direntry->d_name[1] == '.'
1138
and direntry->d_name[2] == '\0'))){
1139
continue;
1140
}
1141
char *fullname = NULL;
1142
ret = asprintf(&fullname, "%s/%s", tempdir,
1143
direntry->d_name);
1144
if(ret < 0){
1145
perror("asprintf");
1146
continue;
1147
}
1148
ret = remove(fullname);
1149
if(ret == -1){
1150
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1151
strerror(errno));
1152
}
1153
free(fullname);
1154
}
1155
closedir(d);
1156
}
1157
ret = rmdir(tempdir);
1158
if(ret == -1 and errno != ENOENT){
1159
perror("rmdir");
1160
}
1161
}
1162
1163
return exitcode;
859
860
if (simple_poll)
861
avahi_simple_poll_free(simple_poll);
862
free(certfile);
863
free(certkey);
864
865
return returncode;
1164
866
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0