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- Committer: Teddy Hogeborn
- Date: 2008-08-03 01:09:36 UTC
- mfrom: (24.1.9 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080803010936-ujme8tgxceszfbi1
* plugbasedclient.c (main): New "--userid" and "--groupid" options.
Take an additional non-option argument and
parse it as a plus-separated and -prefixed
list of additional options.
* plugins.d/mandosclient.c (DH_BITS): Replaced with
"mandos_context.dh_bits". All
users changed.
(certdir): Renamed to "keydir". All users changed.
(certfile): Renamed to "pubkeyfile". All users changed.
(certkey): Renamed to "seckeyfile". All users changed.
(encrypted_session): Replaced with "mandos_context". All users
changed.
(initgnutls): Take additional "session" and "dh_params" arguments.
All callers changed.
(start_mandos_communication): Take additional "mc" argument. All
callers changed. Print target IPv6
address if different than supplied
string.
(simple_poll) Replaced with "mandos_context.simple_poll". All users
changed.
(server): Replaced with "mandos_context.server". All users changed.
(main): Default interface to "eth0". Rename "--certdir" to
"--keydir", "--certkey" to "--seckey", and "--certfile" to
"--pubkey". New options "--dh-bits" and "--priority". If
the interface is not up, bring it up.
Take an additional non-option argument and
parse it as a plus-separated and -prefixed
list of additional options.
* plugins.d/mandosclient.c (DH_BITS): Replaced with
"mandos_context.dh_bits". All
users changed.
(certdir): Renamed to "keydir". All users changed.
(certfile): Renamed to "pubkeyfile". All users changed.
(certkey): Renamed to "seckeyfile". All users changed.
(encrypted_session): Replaced with "mandos_context". All users
changed.
(initgnutls): Take additional "session" and "dh_params" arguments.
All callers changed.
(start_mandos_communication): Take additional "mc" argument. All
callers changed. Print target IPv6
address if different than supplied
string.
(simple_poll) Replaced with "mandos_context.simple_poll". All users
changed.
(server): Replaced with "mandos_context.server". All users changed.
(main): Default interface to "eth0". Rename "--certdir" to
"--keydir", "--certkey" to "--seckey", and "--certfile" to
"--pubkey". New options "--dh-bits" and "--priority". If
the interface is not up, bring it up.
- 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> /* nanosleep(), 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
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
81
82
/* Avahi */
83
/* All Avahi types, constants and functions
84
Avahi*, avahi_*,
85
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
86
43
#include <avahi-core/core.h>
87
44
#include <avahi-core/lookup.h>
88
45
#include <avahi-core/log.h>
90
47
#include <avahi-common/malloc.h>
91
48
#include <avahi-common/error.h>
92
49
93
/* GnuTLS */
94
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
95
functions:
96
gnutls_*
97
init_gnutls_session(),
98
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
101
GNUTLS_OPENPGP_FMT_BASE64 */
102
103
/* GPGME */
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
106
gpgme_*
107
GPGME_PROTOCOL_OpenPGP,
108
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>
109
70
110
71
#define BUFFER_SIZE 256
111
72
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
115
76
116
77
bool debug = false;
117
static const char mandos_protocol_version[] = "1";
118
const char *argp_program_version = "mandos-client " VERSION;
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
120
78
121
/* Used for passing in values through the Avahi callback functions */
79
/* Used for passing in values through all the callback functions */
122
80
typedef struct {
123
81
AvahiSimplePoll *simple_poll;
124
82
AvahiServer *server;
125
83
gnutls_certificate_credentials_t cred;
126
84
unsigned int dh_bits;
127
gnutls_dh_params_t dh_params;
128
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;
129
92
gpgme_ctx_t ctx;
130
} mandos_context;
131
132
/*
133
* Make additional room in "buffer" for at least BUFFER_SIZE
134
* additional bytes. "buffer_capacity" is how much is currently
135
* allocated, "buffer_length" is how much is already used.
136
*/
137
size_t incbuffer(char **buffer, size_t buffer_length,
138
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
142
return 0;
143
}
144
buffer_capacity += BUFFER_SIZE;
145
}
146
return buffer_capacity;
147
}
148
149
/*
150
* Initialize GPGME.
151
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
155
93
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
156
97
gpgme_engine_info_t engine_info;
157
158
159
/*
160
* Helper function to insert pub and seckey to the engine keyring.
161
*/
162
bool import_key(const char *filename){
163
int fd;
164
gpgme_data_t pgp_data;
165
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
if(fd == -1){
168
perror("open");
169
return false;
170
}
171
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
187
if(ret == -1){
188
perror("close");
189
}
190
gpgme_data_release(pgp_data);
191
return true;
192
}
193
194
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
98
99
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
196
101
}
197
102
198
103
/* Init GPGME */
199
104
gpgme_check_version(NULL);
200
105
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
106
if (rc != GPG_ERR_NO_ERROR){
202
107
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
108
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
109
return -1;
205
110
}
206
111
207
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
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){
210
115
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
116
gpgme_strsource(rc), gpgme_strerror(rc));
212
return false;
117
return -1;
213
118
}
214
119
while(engine_info != NULL){
215
120
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
216
121
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
217
engine_info->file_name, tempdir);
122
engine_info->file_name, homedir);
218
123
break;
219
124
}
220
125
engine_info = engine_info->next;
221
126
}
222
127
if(engine_info == NULL){
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
224
return false;
225
}
226
227
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
232
return false;
233
}
234
235
if(not import_key(pubkey) or not import_key(seckey)){
236
return false;
237
}
238
239
return true;
240
}
241
242
/*
243
* Decrypt OpenPGP data.
244
* Returns -1 on error
245
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
250
gpgme_data_t dh_crypto, dh_plain;
251
gpgme_error_t rc;
252
ssize_t ret;
253
size_t plaintext_capacity = 0;
254
ssize_t plaintext_length = 0;
255
256
if(debug){
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
258
}
259
260
/* Create new GPGME data buffer from memory cryptotext */
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
0);
263
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){
264
135
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
136
gpgme_strsource(rc), gpgme_strerror(rc));
266
137
return -1;
268
139
269
140
/* Create new empty GPGME data buffer for the plaintext */
270
141
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
142
if (rc != GPG_ERR_NO_ERROR){
272
143
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
144
gpgme_strsource(rc), gpgme_strerror(rc));
274
gpgme_data_release(dh_crypto);
275
return -1;
276
}
277
278
/* Decrypt data from the cryptotext data buffer to the plaintext
279
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
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){
282
160
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
161
gpgme_strsource(rc), gpgme_strerror(rc));
284
plaintext_length = -1;
285
if(debug){
286
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
} else {
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
295
if(result->file_name != NULL){
296
fprintf(stderr, "File name: %s\n", result->file_name);
297
}
298
gpgme_recipient_t recipient;
299
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
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;
310
193
}
311
194
}
312
195
}
313
goto decrypt_end;
314
196
}
315
197
316
if(debug){
317
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
318
}
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
319
200
320
201
/* Seek back to the beginning of the GPGME plaintext data buffer */
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
323
plaintext_length = -1;
324
goto decrypt_end;
202
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
perror("pgpme_data_seek");
325
204
}
326
205
327
*plaintext = NULL;
206
*new_packet = 0;
328
207
while(true){
329
plaintext_capacity = incbuffer(plaintext,
330
(size_t)plaintext_length,
331
plaintext_capacity);
332
if(plaintext_capacity == 0){
333
perror("incbuffer");
334
plaintext_length = -1;
335
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;
336
217
}
337
218
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
339
220
BUFFER_SIZE);
340
221
/* Print the data, if any */
341
if(ret == 0){
342
/* EOF */
222
if (ret == 0){
343
223
break;
344
224
}
345
225
if(ret < 0){
346
226
perror("gpgme_data_read");
347
plaintext_length = -1;
348
goto decrypt_end;
349
}
350
plaintext_length += ret;
351
}
352
353
if(debug){
354
fprintf(stderr, "Decrypted password is: ");
355
for(ssize_t i = 0; i < plaintext_length; i++){
356
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
357
}
358
fprintf(stderr, "\n");
359
}
360
361
decrypt_end:
362
363
/* Delete the GPGME cryptotext data buffer */
364
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
/* } */
365
239
366
240
/* Delete the GPGME plaintext data buffer */
367
241
gpgme_data_release(dh_plain);
368
return plaintext_length;
242
return new_packet_length;
369
243
}
370
244
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
245
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
247
if (ret == NULL)
375
248
ret = "(unknown)";
376
249
return ret;
377
250
}
378
251
379
/* GnuTLS log function callback */
380
252
static void debuggnutls(__attribute__((unused)) int level,
381
253
const char* string){
382
fprintf(stderr, "GnuTLS: %s", string);
254
fprintf(stderr, "%s", string);
383
255
}
384
256
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
257
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
258
gnutls_dh_params_t *dh_params){
259
const char *err;
388
260
int ret;
389
261
390
262
if(debug){
391
263
fprintf(stderr, "Initializing GnuTLS\n");
392
264
}
393
394
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
265
266
if ((ret = gnutls_global_init ())
267
!= GNUTLS_E_SUCCESS) {
268
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
398
269
return -1;
399
270
}
400
271
401
if(debug){
402
/* "Use a log level over 10 to enable all debugging options."
403
* - GnuTLS manual
404
*/
272
if (debug){
405
273
gnutls_global_set_log_level(11);
406
274
gnutls_global_set_log_function(debuggnutls);
407
275
}
408
276
409
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
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));
418
282
return -1;
419
283
}
420
284
421
285
if(debug){
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
286
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
287
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
288
seckeyfile);
425
289
}
426
290
427
291
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
431
fprintf(stderr,
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
435
safer_gnutls_strerror(ret));
436
goto globalfail;
437
}
438
439
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
444
goto globalfail;
445
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
450
goto globalfail;
451
}
452
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
454
455
return 0;
456
457
globalfail:
458
459
gnutls_certificate_free_credentials(mc->cred);
460
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
462
return -1;
463
}
464
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
467
int ret;
468
/* GnuTLS session creation */
469
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
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){
471
323
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
324
safer_gnutls_strerror(ret));
473
325
}
474
326
475
{
476
const char *err;
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
479
fprintf(stderr, "Syntax error at: %s\n", err);
480
fprintf(stderr, "GnuTLS error: %s\n",
481
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
483
return -1;
484
}
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;
485
333
}
486
334
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
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",
491
339
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
493
340
return -1;
494
341
}
495
342
496
343
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
344
gnutls_certificate_server_set_request (*session,
345
GNUTLS_CERT_IGNORE);
499
346
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
347
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
348
502
349
return 0;
503
350
}
504
351
505
/* Avahi log function callback */
506
352
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
507
353
__attribute__((unused)) const char *txt){}
508
354
509
/* Called when a Mandos server is found */
510
355
static int start_mandos_communication(const char *ip, uint16_t port,
511
356
AvahiIfIndex if_index,
512
357
mandos_context *mc){
513
358
int ret, tcp_sd;
514
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
359
struct sockaddr_in6 to;
516
360
char *buffer = NULL;
517
361
char *decrypted_buffer;
518
362
size_t buffer_length = 0;
519
363
size_t buffer_capacity = 0;
520
364
ssize_t decrypted_buffer_size;
521
size_t written;
365
size_t written = 0;
522
366
int retval = 0;
523
367
char interface[IF_NAMESIZE];
524
368
gnutls_session_t session;
525
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
528
return -1;
529
}
369
gnutls_dh_params_t dh_params;
530
370
531
371
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
372
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
373
ip, port);
534
374
}
535
375
536
376
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
537
if(tcp_sd < 0){
377
if(tcp_sd < 0) {
538
378
perror("socket");
539
379
return -1;
540
380
}
541
381
542
382
if(debug){
543
383
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
384
perror("if_indextoname");
547
387
fprintf(stderr, "Binding to interface %s\n", interface);
548
388
}
549
389
550
memset(&to, 0, sizeof(to));
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
555
if(ret < 0 ){
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 ){
556
394
perror("inet_pton");
557
395
return -1;
558
396
}
560
398
fprintf(stderr, "Bad address: %s\n", ip);
561
399
return -1;
562
400
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
401
to.sin6_port = htons(port); /* Spurious warning */
566
402
567
to.in6.sin6_scope_id = (uint32_t)if_index;
403
to.sin6_scope_id = (uint32_t)if_index;
568
404
569
405
if(debug){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
406
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
572
407
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
408
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
574
409
sizeof(addrstr)) == NULL){
575
410
perror("inet_ntop");
576
411
} else {
580
415
}
581
416
}
582
417
583
ret = connect(tcp_sd, &to.in, sizeof(to));
584
if(ret < 0){
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
419
if (ret < 0){
585
420
perror("connect");
586
421
return -1;
587
422
}
588
423
589
const char *out = mandos_protocol_version;
590
written = 0;
591
while(true){
592
size_t out_size = strlen(out);
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
594
out_size - written));
595
if(ret == -1){
596
perror("write");
597
retval = -1;
598
goto mandos_end;
599
}
600
written += (size_t)ret;
601
if(written < out_size){
602
continue;
603
} else {
604
if(out == mandos_protocol_version){
605
written = 0;
606
out = "\r\n";
607
} else {
608
break;
609
}
610
}
424
ret = initgnutls (mc, &session, &dh_params);
425
if (ret != 0){
426
retval = -1;
427
return -1;
611
428
}
612
429
430
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
431
613
432
if(debug){
614
433
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
434
}
616
435
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
619
do{
620
ret = gnutls_handshake(session);
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
623
if(ret != GNUTLS_E_SUCCESS){
436
ret = gnutls_handshake (session);
437
438
if (ret != GNUTLS_E_SUCCESS){
624
439
if(debug){
625
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
626
gnutls_perror(ret);
440
fprintf(stderr, "\n*** Handshake failed ***\n");
441
gnutls_perror (ret);
627
442
}
628
443
retval = -1;
629
goto mandos_end;
444
goto exit;
630
445
}
631
446
632
/* Read OpenPGP packet that contains the wanted password */
447
//Retrieve OpenPGP packet that contains the wanted password
633
448
634
449
if(debug){
635
450
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
636
451
ip);
637
452
}
638
453
639
454
while(true){
640
buffer_capacity = incbuffer(&buffer, buffer_length,
641
buffer_capacity);
642
if(buffer_capacity == 0){
643
perror("incbuffer");
644
retval = -1;
645
goto mandos_end;
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;
646
462
}
647
463
648
sret = gnutls_record_recv(session, buffer+buffer_length,
649
BUFFER_SIZE);
650
if(sret == 0){
464
ret = gnutls_record_recv(session, buffer+buffer_length,
465
BUFFER_SIZE);
466
if (ret == 0){
651
467
break;
652
468
}
653
if(sret < 0){
654
switch(sret){
469
if (ret < 0){
470
switch(ret){
655
471
case GNUTLS_E_INTERRUPTED:
656
472
case GNUTLS_E_AGAIN:
657
473
break;
658
474
case GNUTLS_E_REHANDSHAKE:
659
do{
660
ret = gnutls_handshake(session);
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
663
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
664
gnutls_perror(ret);
475
ret = gnutls_handshake (session);
476
if (ret < 0){
477
fprintf(stderr, "\n*** Handshake failed ***\n");
478
gnutls_perror (ret);
665
479
retval = -1;
666
goto mandos_end;
480
goto exit;
667
481
}
668
482
break;
669
483
default:
670
484
fprintf(stderr, "Unknown error while reading data from"
671
" encrypted session with Mandos server\n");
485
" encrypted session with mandos server\n");
672
486
retval = -1;
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
674
goto mandos_end;
487
gnutls_bye (session, GNUTLS_SHUT_RDWR);
488
goto exit;
675
489
}
676
490
} else {
677
buffer_length += (size_t) sret;
491
buffer_length += (size_t) ret;
678
492
}
679
493
}
680
494
681
if(debug){
682
fprintf(stderr, "Closing TLS session\n");
683
}
684
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
686
687
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
495
if (buffer_length > 0){
496
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
497
buffer_length,
690
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
692
written = 0;
498
&decrypted_buffer,
499
keydir);
500
if (decrypted_buffer_size >= 0){
693
501
while(written < (size_t) decrypted_buffer_size){
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
502
ret = (int)fwrite (decrypted_buffer + written, 1,
503
(size_t)decrypted_buffer_size - written,
504
stdout);
697
505
if(ret == 0 and ferror(stdout)){
698
506
if(debug){
699
507
fprintf(stderr, "Error writing encrypted data: %s\n",
708
516
} else {
709
517
retval = -1;
710
518
}
711
} else {
712
retval = -1;
713
}
714
715
/* Shutdown procedure */
716
717
mandos_end:
519
}
520
521
//shutdown procedure
522
523
if(debug){
524
fprintf(stderr, "Closing TLS session\n");
525
}
526
718
527
free(buffer);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
722
}
723
gnutls_deinit(session);
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 ();
724
534
return retval;
725
535
}
726
536
727
static void resolve_callback(AvahiSServiceResolver *r,
728
AvahiIfIndex interface,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
730
AvahiResolverEvent event,
731
const char *name,
732
const char *type,
733
const char *domain,
734
const char *host_name,
735
const AvahiAddress *address,
736
uint16_t port,
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
flags,
740
void* userdata){
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) {
741
550
mandos_context *mc = userdata;
742
assert(r);
551
assert(r); /* Spurious warning */
743
552
744
553
/* Called whenever a service has been resolved successfully or
745
554
timed out */
746
555
747
switch(event){
556
switch (event) {
748
557
default:
749
558
case AVAHI_RESOLVER_FAILURE:
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
751
" of type '%s' in domain '%s': %s\n", name, type, domain,
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
752
561
avahi_strerror(avahi_server_errno(mc->server)));
753
562
break;
754
563
757
566
char ip[AVAHI_ADDRESS_STR_MAX];
758
567
avahi_address_snprint(ip, sizeof(ip), address);
759
568
if(debug){
760
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
763
571
}
764
572
int ret = start_mandos_communication(ip, port, interface, mc);
765
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
573
if (ret == 0){
574
exit(EXIT_SUCCESS);
767
575
}
768
576
}
769
577
}
770
578
avahi_s_service_resolver_free(r);
771
579
}
772
580
773
static void browse_callback(AvahiSServiceBrowser *b,
774
AvahiIfIndex interface,
775
AvahiProtocol protocol,
776
AvahiBrowserEvent event,
777
const char *name,
778
const char *type,
779
const char *domain,
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
flags,
782
void* userdata){
581
static void browse_callback( AvahiSServiceBrowser *b,
582
AvahiIfIndex interface,
583
AvahiProtocol protocol,
584
AvahiBrowserEvent event,
585
const char *name,
586
const char *type,
587
const char *domain,
588
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
589
void* userdata) {
783
590
mandos_context *mc = userdata;
784
assert(b);
591
assert(b); /* Spurious warning */
785
592
786
593
/* Called whenever a new services becomes available on the LAN or
787
594
is removed from the LAN */
788
595
789
switch(event){
596
switch (event) {
790
597
default:
791
598
case AVAHI_BROWSER_FAILURE:
792
599
793
fprintf(stderr, "(Avahi browser) %s\n",
600
fprintf(stderr, "(Browser) %s\n",
794
601
avahi_strerror(avahi_server_errno(mc->server)));
795
602
avahi_simple_poll_quit(mc->simple_poll);
796
603
return;
797
604
798
605
case AVAHI_BROWSER_NEW:
799
/* We ignore the returned Avahi resolver object. In the callback
800
function we free it. If the Avahi server is terminated before
801
the callback function is called the Avahi server will free the
802
resolver for us. */
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. */
803
610
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
611
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
612
type, domain,
806
613
AVAHI_PROTO_INET6, 0,
807
614
resolve_callback, mc)))
808
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
809
name, avahi_strerror(avahi_server_errno(mc->server)));
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(mc->server)));
810
617
break;
811
618
812
619
case AVAHI_BROWSER_REMOVE:
814
621
815
622
case AVAHI_BROWSER_ALL_FOR_NOW:
816
623
case AVAHI_BROWSER_CACHE_EXHAUSTED:
817
if(debug){
818
fprintf(stderr, "No Mandos server found, still searching...\n");
819
}
820
624
break;
821
625
}
822
626
}
823
627
824
int main(int argc, char *argv[]){
825
AvahiSServiceBrowser *sb = NULL;
826
int error;
827
int ret;
828
intmax_t tmpmax;
829
int numchars;
830
int exitcode = EXIT_SUCCESS;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
837
char tempdir[] = "/tmp/mandosXXXXXX";
838
bool tempdir_created = false;
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
840
const char *seckey = PATHDIR "/" SECKEY;
841
const char *pubkey = PATHDIR "/" PUBKEY;
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
bool gnutls_initialized = false;
847
bool gpgme_initialized = false;
848
double delay = 2.5;
849
850
{
851
struct argp_option options[] = {
852
{ .name = "debug", .key = 128,
853
.doc = "Debug mode", .group = 3 },
854
{ .name = "connect", .key = 'c',
855
.arg = "ADDRESS:PORT",
856
.doc = "Connect directly to a specific Mandos server",
857
.group = 1 },
858
{ .name = "interface", .key = 'i',
859
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
862
.group = 1 },
863
{ .name = "seckey", .key = 's',
864
.arg = "FILE",
865
.doc = "OpenPGP secret key file base name",
866
.group = 1 },
867
{ .name = "pubkey", .key = 'p',
868
.arg = "FILE",
869
.doc = "OpenPGP public key file base name",
870
.group = 2 },
871
{ .name = "dh-bits", .key = 129,
872
.arg = "BITS",
873
.doc = "Bit length of the prime number used in the"
874
" Diffie-Hellman key exchange",
875
.group = 2 },
876
{ .name = "priority", .key = 130,
877
.arg = "STRING",
878
.doc = "GnuTLS priority string for the TLS handshake",
879
.group = 1 },
880
{ .name = "delay", .key = 131,
881
.arg = "SECONDS",
882
.doc = "Maximum delay to wait for interface startup",
883
.group = 2 },
884
{ .name = NULL }
885
};
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;
651
AvahiSServiceBrowser *sb = NULL;
652
int error;
653
int ret;
654
int debug_int;
655
int returncode = EXIT_SUCCESS;
656
const char *interface = "eth0";
657
struct ifreq network;
658
int sd;
659
char *connect_to = NULL;
660
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
661
mandos_context mc = { .simple_poll = NULL, .server = NULL,
662
.dh_bits = 1024, .priority = "SECURE256"};
886
663
887
error_t parse_opt(int key, char *arg,
888
struct argp_state *state){
889
switch(key){
890
case 128: /* --debug */
891
debug = true;
892
break;
893
case 'c': /* --connect */
894
connect_to = arg;
895
break;
896
case 'i': /* --interface */
897
interface = arg;
898
break;
899
case 's': /* --seckey */
900
seckey = arg;
901
break;
902
case 'p': /* --pubkey */
903
pubkey = arg;
904
break;
905
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
911
}
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
break;
914
case 130: /* --priority */
915
mc.priority = arg;
916
break;
917
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
927
break;
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 '?':
928
715
default:
929
return ARGP_ERR_UNKNOWN;
930
}
931
return 0;
932
}
933
934
struct argp argp = { .options = options, .parser = parse_opt,
935
.args_doc = "",
936
.doc = "Mandos client -- Get and decrypt"
937
" passwords from a Mandos server" };
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
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;
732
}
733
734
if_index = (AvahiIfIndex) if_nametoindex(interface);
735
if(if_index == 0){
736
fprintf(stderr, "No such interface: \"%s\"\n", interface);
737
exit(EXIT_FAILURE);
738
}
739
740
if(connect_to != NULL){
741
/* Connect directly, do not use Zeroconf */
742
/* (Mainly meant for debugging) */
743
char *address = strrchr(connect_to, ':');
744
if(address == NULL){
745
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
}
754
*address = '\0';
755
address = connect_to;
756
ret = start_mandos_communication(address, port, if_index, &mc);
757
if(ret < 0){
758
exit(EXIT_FAILURE);
759
} else {
760
exit(EXIT_SUCCESS);
761
}
762
}
956
763
957
764
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
765
if(sd < 0) {
959
766
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
767
returncode = EXIT_FAILURE;
768
goto exit;
968
769
}
969
strcpy(network.ifr_name, interface);
770
strcpy(network.ifr_name, interface); /* Spurious warning */
970
771
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
772
if(ret == -1){
773
972
774
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
775
returncode = EXIT_FAILURE;
776
goto exit;
981
777
}
982
778
if((network.ifr_flags & IFF_UP) == 0){
983
779
network.ifr_flags |= IFF_UP;
984
780
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
781
if(ret == -1){
986
782
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
goto end;
995
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
999
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1000
if(ret == -1){
1001
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
} else {
1043
gnutls_initialized = true;
1044
}
1045
1046
if(mkdtemp(tempdir) == NULL){
1047
perror("mkdtemp");
1048
goto end;
1049
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
} else {
1057
gpgme_initialized = true;
1058
}
1059
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1065
}
1066
1067
if(connect_to != NULL){
1068
/* Connect directly, do not use Zeroconf */
1069
/* (Mainly meant for debugging) */
1070
char *address = strrchr(connect_to, ':');
1071
if(address == NULL){
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
1085
*address = '\0';
1086
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
1091
exitcode = EXIT_SUCCESS;
1092
}
1093
goto end;
1094
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1111
{
1112
AvahiServerConfig config;
1113
/* Do not publish any local Zeroconf records */
783
returncode = EXIT_FAILURE;
784
goto exit;
785
}
786
}
787
close(sd);
788
789
if (not debug){
790
avahi_set_log_function(empty_log);
791
}
792
793
/* Initialize the psuedo-RNG */
794
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 */
1114
804
avahi_server_config_init(&config);
1115
805
config.publish_hinfo = 0;
1116
806
config.publish_addresses = 0;
1117
807
config.publish_workstation = 0;
1118
808
config.publish_domain = 0;
1119
809
1120
810
/* Allocate a new server */
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
811
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
812
&config, NULL, NULL, &error);
1124
813
1125
/* Free the Avahi configuration data */
814
/* Free the configuration data */
1126
815
avahi_server_config_free(&config);
1127
}
1128
1129
/* Check if creating the Avahi server object succeeded */
1130
if(mc.server == NULL){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
1134
goto end;
1135
}
1136
1137
/* Create the Avahi service browser */
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1141
if(sb == NULL){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
1148
/* Run the main loop */
1149
1150
if(debug){
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
1155
1156
end:
1157
1158
if(debug){
1159
fprintf(stderr, "%s exiting\n", argv[0]);
1160
}
1161
1162
/* Cleanup things */
1163
if(sb != NULL)
1164
avahi_s_service_browser_free(sb);
1165
1166
if(mc.server != NULL)
1167
avahi_server_free(mc.server);
1168
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
1171
1172
if(gnutls_initialized){
1173
gnutls_certificate_free_credentials(mc.cred);
1174
gnutls_global_deinit();
1175
gnutls_dh_params_deinit(mc.dh_params);
1176
}
1177
1178
if(gpgme_initialized){
1179
gpgme_release(mc.ctx);
1180
}
1181
1182
/* Removes the temp directory used by GPGME */
1183
if(tempdir_created){
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1189
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
1204
char *fullname = NULL;
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
1206
direntry->d_name);
1207
if(ret < 0){
1208
perror("asprintf");
1209
continue;
1210
}
1211
ret = remove(fullname);
1212
if(ret == -1){
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
1215
}
1216
free(fullname);
1217
}
1218
closedir(d);
1219
}
1220
ret = rmdir(tempdir);
1221
if(ret == -1 and errno != ENOENT){
1222
perror("rmdir");
1223
}
1224
}
1225
1226
return exitcode;
816
817
/* Check if creating the server object succeeded */
818
if (!mc.server) {
819
fprintf(stderr, "Failed to create server: %s\n",
820
avahi_strerror(error));
821
returncode = EXIT_FAILURE;
822
goto exit;
823
}
824
825
/* Create the service browser */
826
sb = avahi_s_service_browser_new(mc.server, if_index,
827
AVAHI_PROTO_INET6,
828
"_mandos._tcp", NULL, 0,
829
browse_callback, &mc);
830
if (!sb) {
831
fprintf(stderr, "Failed to create service browser: %s\n",
832
avahi_strerror(avahi_server_errno(mc.server)));
833
returncode = EXIT_FAILURE;
834
goto exit;
835
}
836
837
/* Run the main loop */
838
839
if (debug){
840
fprintf(stderr, "Starting avahi loop search\n");
841
}
842
843
avahi_simple_poll_loop(mc.simple_poll);
844
845
exit:
846
847
if (debug){
848
fprintf(stderr, "%s exiting\n", argv[0]);
849
}
850
851
/* Cleanup things */
852
if (sb)
853
avahi_s_service_browser_free(sb);
854
855
if (mc.server)
856
avahi_server_free(mc.server);
857
858
if (mc.simple_poll)
859
avahi_simple_poll_free(mc.simple_poll);
860
free(pubkeyfile);
861
free(seckeyfile);
862
863
return returncode;
1227
864
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0