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- Committer: Teddy Hogeborn
- Date: 2008-07-29 03:35:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20080729033539-08zecoj3jwlkpjhw
* server.conf: New file.
* mandos-clients.conf: Renamed to clients.conf.
* Makefile (FORTIFY): New.
(CFLAGS): Include $(FORTIFY).
* plugins.d/mandosclient.c (main): New "if_index" variable. Bug fix:
check if interface exists. New
"--connect" option.
* server.py (serviceInterface): Removed; replaced by
"AvahiService.interface". All users
changed.
(AvahiError, AvahiServiceError, AvahiGroupError): New exception
classes.
(AvahiService): New class.
(serviceName): Removed; replaced by "AvahiService.name". All users
changed.
(serviceType): Removed; replaced by "AvahiService.type". All users
changed.
(servicePort): Removed; replaced by "AvahiService.port". All users
changed.
(serviceTXT): Removed; replaced by "AvahiService.TXT". All users
changed.
(domain): Removed; replaced by "AvahiService.domain". All users
changed.
(host): Removed; replaced by "AvahiService.host". All users
changed.
(rename_count): Removed; replaced by "AvahiService.rename_count" and
"AvahiService.max_renames". All users changed.
(Client.__init__): If no secret or secfile, raise TypeError instead
of RuntimeError.
(Client.last_seen): Renamed to "Client.last_checked_ok". All users
changed.
(Client.stop, Client.stop_checker): Use "getattr" with default value
instead of "hasattr".
(Client.still_valid): Removed "now" argument.
(Client.handle): Separate the "no client found" and "client invalid"
cases for clearer code.
(IPv6_TCPServer.__init__): "options" argument replaced by
"settings". All callers changed.
(IPv6_TCPServer.options): Replaced by "IPv6_TCPServer.settings".
All users changed.
(IPv6_TCPServer.server_bind): Use getattr instead of hasattr.
(add_service): Removed; replaced by "AvahiService.add". All callers
changed.
(remove_service): Removed; replaced by "AvahiService.remove". All
callers changed.
(entry_group_state_changed): On entry group collision, call the new
AvahiService.rename method. Raise
AvahiGroupError on group error.
(if_nametoindex): Use ctypes.utils.find_library to locate the C
library. Cache the result. Loop on EINTR.
(daemon): Use os.path.devnull to locate "/dev/null".
(killme): Removed. All callers changed to do "sys.exit()" instead,
except where stated otherwise.
(main): Removed "exitstatus". Removed all default values from all
non-bool options. New option "--configdir". New variables
"server_defaults" and "server_settings", read from
"%(configdir)s/server.conf". Let any supplied command line
options override server settings. Variable "defaults"
renamed to "client_defaults", which is read from
"clients.conf" instead of "mandos-clients.conf". New global
AvahiService object "service" replaces old global variables.
Catch AvahiError and exit with error if caught.
* mandos-clients.conf: Renamed to clients.conf.
* Makefile (FORTIFY): New.
(CFLAGS): Include $(FORTIFY).
* plugins.d/mandosclient.c (main): New "if_index" variable. Bug fix:
check if interface exists. New
"--connect" option.
* server.py (serviceInterface): Removed; replaced by
"AvahiService.interface". All users
changed.
(AvahiError, AvahiServiceError, AvahiGroupError): New exception
classes.
(AvahiService): New class.
(serviceName): Removed; replaced by "AvahiService.name". All users
changed.
(serviceType): Removed; replaced by "AvahiService.type". All users
changed.
(servicePort): Removed; replaced by "AvahiService.port". All users
changed.
(serviceTXT): Removed; replaced by "AvahiService.TXT". All users
changed.
(domain): Removed; replaced by "AvahiService.domain". All users
changed.
(host): Removed; replaced by "AvahiService.host". All users
changed.
(rename_count): Removed; replaced by "AvahiService.rename_count" and
"AvahiService.max_renames". All users changed.
(Client.__init__): If no secret or secfile, raise TypeError instead
of RuntimeError.
(Client.last_seen): Renamed to "Client.last_checked_ok". All users
changed.
(Client.stop, Client.stop_checker): Use "getattr" with default value
instead of "hasattr".
(Client.still_valid): Removed "now" argument.
(Client.handle): Separate the "no client found" and "client invalid"
cases for clearer code.
(IPv6_TCPServer.__init__): "options" argument replaced by
"settings". All callers changed.
(IPv6_TCPServer.options): Replaced by "IPv6_TCPServer.settings".
All users changed.
(IPv6_TCPServer.server_bind): Use getattr instead of hasattr.
(add_service): Removed; replaced by "AvahiService.add". All callers
changed.
(remove_service): Removed; replaced by "AvahiService.remove". All
callers changed.
(entry_group_state_changed): On entry group collision, call the new
AvahiService.rename method. Raise
AvahiGroupError on group error.
(if_nametoindex): Use ctypes.utils.find_library to locate the C
library. Cache the result. Loop on EINTR.
(daemon): Use os.path.devnull to locate "/dev/null".
(killme): Removed. All callers changed to do "sys.exit()" instead,
except where stated otherwise.
(main): Removed "exitstatus". Removed all default values from all
non-bool options. New option "--configdir". New variables
"server_defaults" and "server_settings", read from
"%(configdir)s/server.conf". Let any supplied command line
options override server settings. Variable "defaults"
renamed to "client_defaults", which is read from
"clients.conf" instead of "mandos-clients.conf". New global
AvahiService object "service" replaces old global variables.
Catch AvahiError and exit with error if caught.
- 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
26
25
* along with this program. If not, see
27
26
* <http://www.gnu.org/licenses/>.
28
27
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#define _LARGEFILE_SOURCE
34
34
#define _FILE_OFFSET_BITS 64
35
35
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
40
#include <stdint.h> /* uint16_t, uint32_t */
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(),
52
DIR */
53
#include <sys/stat.h> /* open() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
57
#include <fcntl.h> /* open() */
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
*/
60
#include <inttypes.h> /* PRIu16, SCNu16 */
61
#include <assert.h> /* assert() */
62
#include <errno.h> /* perror(), errno */
63
#include <time.h> /* time() */
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
65
SIOCSIFFLAGS, if_indextoname(),
66
if_nametoindex(), IF_NAMESIZE */
67
#include <netinet/in.h>
68
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
69
getuid(), getgid(), setuid(),
70
setgid() */
71
#include <arpa/inet.h> /* inet_pton(), htons */
72
#include <iso646.h> /* not, and, or */
73
#include <argp.h> /* struct argp_option, error_t, struct
74
argp_state, struct argp,
75
argp_parse(), ARGP_KEY_ARG,
76
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
77
78
/* Avahi */
79
/* All Avahi types, constants and functions
80
Avahi*, avahi_*,
81
AVAHI_* */
36
#include <stdio.h>
37
#include <assert.h>
38
#include <stdlib.h>
39
#include <time.h>
40
#include <net/if.h> /* if_nametoindex */
41
82
42
#include <avahi-core/core.h>
83
43
#include <avahi-core/lookup.h>
84
44
#include <avahi-core/log.h>
86
46
#include <avahi-common/malloc.h>
87
47
#include <avahi-common/error.h>
88
48
89
/* GnuTLS */
90
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
91
functions:
92
gnutls_*
93
init_gnutls_session(),
94
GNUTLS_* */
95
#include <gnutls/openpgp.h>
96
/* gnutls_certificate_set_openpgp_key_file(),
97
GNUTLS_OPENPGP_FMT_BASE64 */
98
99
/* GPGME */
100
#include <gpgme.h> /* All GPGME types, constants and
101
functions:
102
gpgme_*
103
GPGME_PROTOCOL_OpenPGP,
104
GPG_ERR_NO_* */
105
49
//mandos client part
50
#include <sys/types.h> /* socket(), inet_pton() */
51
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
52
struct in6_addr, inet_pton() */
53
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
54
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
55
56
#include <unistd.h> /* close() */
57
#include <netinet/in.h>
58
#include <stdbool.h> /* true */
59
#include <string.h> /* memset */
60
#include <arpa/inet.h> /* inet_pton() */
61
#include <iso646.h> /* not */
62
63
// gpgme
64
#include <errno.h> /* perror() */
65
#include <gpgme.h>
66
67
// getopt long
68
#include <getopt.h>
69
70
#ifndef CERT_ROOT
71
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
72
#endif
73
#define CERTFILE CERT_ROOT "openpgp-client.txt"
74
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
106
75
#define BUFFER_SIZE 256
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
76
#define DH_BITS 1024
111
77
112
78
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client " VERSION;
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
79
117
/* Used for passing in values through the Avahi callback functions */
118
80
typedef struct {
119
AvahiSimplePoll *simple_poll;
120
AvahiServer *server;
81
gnutls_session_t session;
121
82
gnutls_certificate_credentials_t cred;
122
unsigned int dh_bits;
123
83
gnutls_dh_params_t dh_params;
124
const char *priority;
84
} encrypted_session;
85
86
87
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet, const char *homedir){
89
gpgme_data_t dh_crypto, dh_plain;
125
90
gpgme_ctx_t ctx;
126
} mandos_context;
127
128
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
132
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
134
size_t buffer_capacity){
135
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if(buffer == NULL){
138
return 0;
139
}
140
buffer_capacity += BUFFER_SIZE;
141
}
142
return buffer_capacity;
143
}
144
145
/*
146
* Initialize GPGME.
147
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
151
91
gpgme_error_t rc;
92
ssize_t ret;
93
ssize_t new_packet_capacity = 0;
94
ssize_t new_packet_length = 0;
152
95
gpgme_engine_info_t engine_info;
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if(rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if(rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
190
if(debug){
191
fprintf(stderr, "Initialize gpgme\n");
96
97
if (debug){
98
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
192
99
}
193
100
194
101
/* Init GPGME */
195
102
gpgme_check_version(NULL);
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if(rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
103
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
202
104
203
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info(&engine_info);
205
if(rc != GPG_ERR_NO_ERROR){
105
/* Set GPGME home directory */
106
rc = gpgme_get_engine_info (&engine_info);
107
if (rc != GPG_ERR_NO_ERROR){
206
108
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
109
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
110
return -1;
209
111
}
210
112
while(engine_info != NULL){
211
113
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
114
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
115
engine_info->file_name, homedir);
214
116
break;
215
117
}
216
118
engine_info = engine_info->next;
217
119
}
218
120
if(engine_info == NULL){
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if(rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if(not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if(debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
}
255
256
/* Create new GPGME data buffer from memory cryptotext */
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
0);
259
if(rc != GPG_ERR_NO_ERROR){
121
fprintf(stderr, "Could not set home dir to %s\n", homedir);
122
return -1;
123
}
124
125
/* Create new GPGME data buffer from packet buffer */
126
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
127
if (rc != GPG_ERR_NO_ERROR){
260
128
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
129
gpgme_strsource(rc), gpgme_strerror(rc));
262
130
return -1;
264
132
265
133
/* Create new empty GPGME data buffer for the plaintext */
266
134
rc = gpgme_data_new(&dh_plain);
267
if(rc != GPG_ERR_NO_ERROR){
135
if (rc != GPG_ERR_NO_ERROR){
268
136
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
137
gpgme_strsource(rc), gpgme_strerror(rc));
270
gpgme_data_release(dh_crypto);
271
return -1;
272
}
273
274
/* Decrypt data from the cryptotext data buffer to the plaintext
275
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if(rc != GPG_ERR_NO_ERROR){
138
return -1;
139
}
140
141
/* Create new GPGME "context" */
142
rc = gpgme_new(&ctx);
143
if (rc != GPG_ERR_NO_ERROR){
144
fprintf(stderr, "bad gpgme_new: %s: %s\n",
145
gpgme_strsource(rc), gpgme_strerror(rc));
146
return -1;
147
}
148
149
/* Decrypt data from the FILE pointer to the plaintext data
150
buffer */
151
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
152
if (rc != GPG_ERR_NO_ERROR){
278
153
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
154
gpgme_strsource(rc), gpgme_strerror(rc));
280
plaintext_length = -1;
281
if(debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if(result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
155
return -1;
156
}
157
158
if(debug){
159
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
160
}
161
162
if (debug){
163
gpgme_decrypt_result_t result;
164
result = gpgme_op_decrypt_result(ctx);
165
if (result == NULL){
166
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
167
} else {
168
fprintf(stderr, "Unsupported algorithm: %s\n",
169
result->unsupported_algorithm);
170
fprintf(stderr, "Wrong key usage: %d\n",
171
result->wrong_key_usage);
172
if(result->file_name != NULL){
173
fprintf(stderr, "File name: %s\n", result->file_name);
174
}
175
gpgme_recipient_t recipient;
176
recipient = result->recipients;
177
if(recipient){
178
while(recipient != NULL){
179
fprintf(stderr, "Public key algorithm: %s\n",
180
gpgme_pubkey_algo_name(recipient->pubkey_algo));
181
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
182
fprintf(stderr, "Secret key available: %s\n",
183
recipient->status == GPG_ERR_NO_SECKEY
184
? "No" : "Yes");
185
recipient = recipient->next;
306
186
}
307
187
}
308
188
}
309
goto decrypt_end;
310
189
}
311
190
312
if(debug){
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
191
/* Delete the GPGME FILE pointer cryptotext data buffer */
192
gpgme_data_release(dh_crypto);
315
193
316
194
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
321
}
322
323
*plaintext = NULL;
195
gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);
196
197
*new_packet = 0;
324
198
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if(plaintext_capacity == 0){
329
perror("adjustbuffer");
330
plaintext_length = -1;
331
goto decrypt_end;
199
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
200
*new_packet = realloc(*new_packet,
201
(unsigned int)new_packet_capacity
202
+ BUFFER_SIZE);
203
if (*new_packet == NULL){
204
perror("realloc");
205
return -1;
206
}
207
new_packet_capacity += BUFFER_SIZE;
332
208
}
333
209
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
210
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
335
211
BUFFER_SIZE);
336
212
/* Print the data, if any */
337
if(ret == 0){
338
/* EOF */
213
if (ret == 0){
339
214
break;
340
215
}
341
216
if(ret < 0){
342
217
perror("gpgme_data_read");
343
plaintext_length = -1;
344
goto decrypt_end;
345
}
346
plaintext_length += ret;
347
}
348
349
if(debug){
350
fprintf(stderr, "Decrypted password is: ");
351
for(ssize_t i = 0; i < plaintext_length; i++){
352
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
353
}
354
fprintf(stderr, "\n");
355
}
356
357
decrypt_end:
358
359
/* Delete the GPGME cryptotext data buffer */
360
gpgme_data_release(dh_crypto);
218
return -1;
219
}
220
new_packet_length += ret;
221
}
222
223
/* FIXME: check characters before printing to screen so to not print
224
terminal control characters */
225
/* if(debug){ */
226
/* fprintf(stderr, "decrypted password is: "); */
227
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
228
/* fprintf(stderr, "\n"); */
229
/* } */
361
230
362
231
/* Delete the GPGME plaintext data buffer */
363
232
gpgme_data_release(dh_plain);
364
return plaintext_length;
233
return new_packet_length;
365
234
}
366
235
367
static const char * safer_gnutls_strerror(int value) {
368
const char *ret = gnutls_strerror(value); /* Spurious warning */
369
if(ret == NULL)
236
static const char * safer_gnutls_strerror (int value) {
237
const char *ret = gnutls_strerror (value);
238
if (ret == NULL)
370
239
ret = "(unknown)";
371
240
return ret;
372
241
}
373
242
374
/* GnuTLS log function callback */
375
static void debuggnutls(__attribute__((unused)) int level,
376
const char* string){
377
fprintf(stderr, "GnuTLS: %s", string);
243
void debuggnutls(__attribute__((unused)) int level,
244
const char* string){
245
fprintf(stderr, "%s", string);
378
246
}
379
247
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
248
int initgnutls(encrypted_session *es){
249
const char *err;
383
250
int ret;
384
251
385
252
if(debug){
386
253
fprintf(stderr, "Initializing GnuTLS\n");
387
254
}
388
255
389
ret = gnutls_global_init();
390
if(ret != GNUTLS_E_SUCCESS) {
391
fprintf(stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
256
if ((ret = gnutls_global_init ())
257
!= GNUTLS_E_SUCCESS) {
258
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
393
259
return -1;
394
260
}
395
396
if(debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
261
262
if (debug){
400
263
gnutls_global_set_log_level(11);
401
264
gnutls_global_set_log_function(debuggnutls);
402
265
}
403
266
404
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if(ret != GNUTLS_E_SUCCESS){
407
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit();
267
/* openpgp credentials */
268
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
269
!= GNUTLS_E_SUCCESS) {
270
fprintf (stderr, "memory error: %s\n",
271
safer_gnutls_strerror(ret));
411
272
return -1;
412
273
}
413
274
414
275
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
276
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
277
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
278
KEYFILE);
418
279
}
419
280
420
281
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
423
if(ret != GNUTLS_E_SUCCESS) {
424
fprintf(stderr,
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
428
safer_gnutls_strerror(ret));
429
goto globalfail;
430
}
431
432
/* GnuTLS server initialization */
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if(ret != GNUTLS_E_SUCCESS) {
435
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
437
goto globalfail;
438
}
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if(ret != GNUTLS_E_SUCCESS) {
441
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
443
goto globalfail;
444
}
445
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
448
return 0;
449
450
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
455
return -1;
456
}
457
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
460
int ret;
461
/* GnuTLS session creation */
462
ret = gnutls_init(session, GNUTLS_SERVER);
463
if(ret != GNUTLS_E_SUCCESS){
282
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
283
if (ret != GNUTLS_E_SUCCESS) {
284
fprintf
285
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
286
" '%s')\n",
287
ret, CERTFILE, KEYFILE);
288
fprintf(stdout, "The Error is: %s\n",
289
safer_gnutls_strerror(ret));
290
return -1;
291
}
292
293
//GnuTLS server initialization
294
if ((ret = gnutls_dh_params_init (&es->dh_params))
295
!= GNUTLS_E_SUCCESS) {
296
fprintf (stderr, "Error in dh parameter initialization: %s\n",
297
safer_gnutls_strerror(ret));
298
return -1;
299
}
300
301
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "Error in prime generation: %s\n",
304
safer_gnutls_strerror(ret));
305
return -1;
306
}
307
308
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
309
310
// GnuTLS session creation
311
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
312
!= GNUTLS_E_SUCCESS){
464
313
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
314
safer_gnutls_strerror(ret));
466
315
}
467
316
468
{
469
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if(ret != GNUTLS_E_SUCCESS) {
472
fprintf(stderr, "Syntax error at: %s\n", err);
473
fprintf(stderr, "GnuTLS error: %s\n",
474
safer_gnutls_strerror(ret));
475
gnutls_deinit(*session);
476
return -1;
477
}
317
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
318
!= GNUTLS_E_SUCCESS) {
319
fprintf(stderr, "Syntax error at: %s\n", err);
320
fprintf(stderr, "GnuTLS error: %s\n",
321
safer_gnutls_strerror(ret));
322
return -1;
478
323
}
479
324
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if(ret != GNUTLS_E_SUCCESS) {
483
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
325
if ((ret = gnutls_credentials_set
326
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
327
!= GNUTLS_E_SUCCESS) {
328
fprintf(stderr, "Error setting a credentials set: %s\n",
484
329
safer_gnutls_strerror(ret));
485
gnutls_deinit(*session);
486
330
return -1;
487
331
}
488
332
489
333
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request(*session,
491
GNUTLS_CERT_IGNORE);
334
gnutls_certificate_server_set_request (es->session,
335
GNUTLS_CERT_IGNORE);
492
336
493
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
337
gnutls_dh_set_prime_bits (es->session, DH_BITS);
494
338
495
339
return 0;
496
340
}
497
341
498
/* Avahi log function callback */
499
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
500
__attribute__((unused)) const char *txt){}
342
void empty_log(__attribute__((unused)) AvahiLogLevel level,
343
__attribute__((unused)) const char *txt){}
501
344
502
/* Called when a Mandos server is found */
503
static int start_mandos_communication(const char *ip, uint16_t port,
504
AvahiIfIndex if_index,
505
mandos_context *mc){
345
int start_mandos_communication(const char *ip, uint16_t port,
346
unsigned int if_index){
506
347
int ret, tcp_sd;
507
ssize_t sret;
508
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
348
struct sockaddr_in6 to;
349
encrypted_session es;
509
350
char *buffer = NULL;
510
351
char *decrypted_buffer;
511
352
size_t buffer_length = 0;
512
353
size_t buffer_capacity = 0;
513
354
ssize_t decrypted_buffer_size;
514
size_t written;
355
size_t written = 0;
515
356
int retval = 0;
516
357
char interface[IF_NAMESIZE];
517
gnutls_session_t session;
518
519
ret = init_gnutls_session(mc, &session);
520
if(ret != 0){
521
return -1;
522
}
523
358
524
359
if(debug){
525
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
526
"\n", ip, port);
360
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
361
ip, port);
527
362
}
528
363
529
364
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
532
367
return -1;
533
368
}
534
369
535
if(debug){
536
if(if_indextoname((unsigned int)if_index, interface) == NULL){
370
if(if_indextoname(if_index, interface) == NULL){
371
if(debug){
537
372
perror("if_indextoname");
538
return -1;
539
373
}
374
return -1;
375
}
376
377
if(debug){
540
378
fprintf(stderr, "Binding to interface %s\n", interface);
541
379
}
542
380
543
memset(&to, 0, sizeof(to));
544
to.in6.sin6_family = AF_INET6;
545
/* It would be nice to have a way to detect if we were passed an
546
IPv4 address here. Now we assume an IPv6 address. */
547
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
548
if(ret < 0 ){
381
memset(&to,0,sizeof(to)); /* Spurious warning */
382
to.sin6_family = AF_INET6;
383
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
384
if (ret < 0 ){
549
385
perror("inet_pton");
550
386
return -1;
551
}
387
}
552
388
if(ret == 0){
553
389
fprintf(stderr, "Bad address: %s\n", ip);
554
390
return -1;
555
391
}
556
to.in6.sin6_port = htons(port); /* Spurious warning */
392
to.sin6_port = htons(port); /* Spurious warning */
557
393
558
to.in6.sin6_scope_id = (uint32_t)if_index;
394
to.sin6_scope_id = (uint32_t)if_index;
559
395
560
396
if(debug){
561
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
562
port);
563
char addrstr[INET6_ADDRSTRLEN] = "";
564
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
565
sizeof(addrstr)) == NULL){
566
perror("inet_ntop");
567
} else {
568
if(strcmp(addrstr, ip) != 0){
569
fprintf(stderr, "Canonical address form: %s\n", addrstr);
570
}
571
}
397
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
398
/* char addrstr[INET6_ADDRSTRLEN]; */
399
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
400
/* sizeof(addrstr)) == NULL){ */
401
/* perror("inet_ntop"); */
402
/* } else { */
403
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
404
/* addrstr, ntohs(to.sin6_port)); */
405
/* } */
572
406
}
573
407
574
ret = connect(tcp_sd, &to.in, sizeof(to));
575
if(ret < 0){
408
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
409
if (ret < 0){
576
410
perror("connect");
577
411
return -1;
578
412
}
579
413
580
const char *out = mandos_protocol_version;
581
written = 0;
582
while(true){
583
size_t out_size = strlen(out);
584
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
585
out_size - written));
586
if(ret == -1){
587
perror("write");
588
retval = -1;
589
goto mandos_end;
590
}
591
written += (size_t)ret;
592
if(written < out_size){
593
continue;
594
} else {
595
if(out == mandos_protocol_version){
596
written = 0;
597
out = "\r\n";
598
} else {
599
break;
600
}
601
}
414
ret = initgnutls (&es);
415
if (ret != 0){
416
retval = -1;
417
return -1;
602
418
}
603
419
420
gnutls_transport_set_ptr (es.session,
421
(gnutls_transport_ptr_t) tcp_sd);
422
604
423
if(debug){
605
424
fprintf(stderr, "Establishing TLS session with %s\n", ip);
606
425
}
607
426
608
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
609
610
do{
611
ret = gnutls_handshake(session);
612
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
614
if(ret != GNUTLS_E_SUCCESS){
427
ret = gnutls_handshake (es.session);
428
429
if (ret != GNUTLS_E_SUCCESS){
615
430
if(debug){
616
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
617
gnutls_perror(ret);
431
fprintf(stderr, "\n*** Handshake failed ***\n");
432
gnutls_perror (ret);
618
433
}
619
434
retval = -1;
620
goto mandos_end;
435
goto exit;
621
436
}
622
437
623
/* Read OpenPGP packet that contains the wanted password */
438
//Retrieve OpenPGP packet that contains the wanted password
624
439
625
440
if(debug){
626
441
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
627
442
ip);
628
443
}
629
444
630
445
while(true){
631
buffer_capacity = adjustbuffer(&buffer, buffer_length,
632
buffer_capacity);
633
if(buffer_capacity == 0){
634
perror("adjustbuffer");
635
retval = -1;
636
goto mandos_end;
446
if (buffer_length + BUFFER_SIZE > buffer_capacity){
447
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
448
if (buffer == NULL){
449
perror("realloc");
450
goto exit;
451
}
452
buffer_capacity += BUFFER_SIZE;
637
453
}
638
454
639
sret = gnutls_record_recv(session, buffer+buffer_length,
640
BUFFER_SIZE);
641
if(sret == 0){
455
ret = gnutls_record_recv
456
(es.session, buffer+buffer_length, BUFFER_SIZE);
457
if (ret == 0){
642
458
break;
643
459
}
644
if(sret < 0){
645
switch(sret){
460
if (ret < 0){
461
switch(ret){
646
462
case GNUTLS_E_INTERRUPTED:
647
463
case GNUTLS_E_AGAIN:
648
464
break;
649
465
case GNUTLS_E_REHANDSHAKE:
650
do{
651
ret = gnutls_handshake(session);
652
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
653
if(ret < 0){
654
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
655
gnutls_perror(ret);
466
ret = gnutls_handshake (es.session);
467
if (ret < 0){
468
fprintf(stderr, "\n*** Handshake failed ***\n");
469
gnutls_perror (ret);
656
470
retval = -1;
657
goto mandos_end;
471
goto exit;
658
472
}
659
473
break;
660
474
default:
661
475
fprintf(stderr, "Unknown error while reading data from"
662
" encrypted session with Mandos server\n");
476
" encrypted session with mandos server\n");
663
477
retval = -1;
664
gnutls_bye(session, GNUTLS_SHUT_RDWR);
665
goto mandos_end;
478
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
479
goto exit;
666
480
}
667
481
} else {
668
buffer_length += (size_t) sret;
482
buffer_length += (size_t) ret;
669
483
}
670
484
}
671
485
672
if(debug){
673
fprintf(stderr, "Closing TLS session\n");
674
}
675
676
gnutls_bye(session, GNUTLS_SHUT_RDWR);
677
678
if(buffer_length > 0){
679
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
486
if (buffer_length > 0){
487
decrypted_buffer_size = pgp_packet_decrypt(buffer,
680
488
buffer_length,
681
&decrypted_buffer);
682
if(decrypted_buffer_size >= 0){
683
written = 0;
489
&decrypted_buffer,
490
CERT_ROOT);
491
if (decrypted_buffer_size >= 0){
684
492
while(written < (size_t) decrypted_buffer_size){
685
ret = (int)fwrite(decrypted_buffer + written, 1,
686
(size_t)decrypted_buffer_size - written,
687
stdout);
493
ret = (int)fwrite (decrypted_buffer + written, 1,
494
(size_t)decrypted_buffer_size - written,
495
stdout);
688
496
if(ret == 0 and ferror(stdout)){
689
497
if(debug){
690
498
fprintf(stderr, "Error writing encrypted data: %s\n",
699
507
} else {
700
508
retval = -1;
701
509
}
702
} else {
703
retval = -1;
704
}
705
706
/* Shutdown procedure */
707
708
mandos_end:
510
}
511
512
//shutdown procedure
513
514
if(debug){
515
fprintf(stderr, "Closing TLS session\n");
516
}
517
709
518
free(buffer);
710
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
711
if(ret == -1){
712
perror("close");
713
}
714
gnutls_deinit(session);
519
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
520
exit:
521
close(tcp_sd);
522
gnutls_deinit (es.session);
523
gnutls_certificate_free_credentials (es.cred);
524
gnutls_global_deinit ();
715
525
return retval;
716
526
}
717
527
718
static void resolve_callback(AvahiSServiceResolver *r,
719
AvahiIfIndex interface,
720
AVAHI_GCC_UNUSED AvahiProtocol protocol,
721
AvahiResolverEvent event,
722
const char *name,
723
const char *type,
724
const char *domain,
725
const char *host_name,
726
const AvahiAddress *address,
727
uint16_t port,
728
AVAHI_GCC_UNUSED AvahiStringList *txt,
729
AVAHI_GCC_UNUSED AvahiLookupResultFlags
730
flags,
731
void* userdata) {
732
mandos_context *mc = userdata;
733
assert(r);
528
static AvahiSimplePoll *simple_poll = NULL;
529
static AvahiServer *server = NULL;
530
531
static void resolve_callback(
532
AvahiSServiceResolver *r,
533
AvahiIfIndex interface,
534
AVAHI_GCC_UNUSED AvahiProtocol protocol,
535
AvahiResolverEvent event,
536
const char *name,
537
const char *type,
538
const char *domain,
539
const char *host_name,
540
const AvahiAddress *address,
541
uint16_t port,
542
AVAHI_GCC_UNUSED AvahiStringList *txt,
543
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
544
AVAHI_GCC_UNUSED void* userdata) {
545
546
assert(r); /* Spurious warning */
734
547
735
548
/* Called whenever a service has been resolved successfully or
736
549
timed out */
737
550
738
switch(event) {
551
switch (event) {
739
552
default:
740
553
case AVAHI_RESOLVER_FAILURE:
741
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
742
" of type '%s' in domain '%s': %s\n", name, type, domain,
743
avahi_strerror(avahi_server_errno(mc->server)));
554
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
555
" type '%s' in domain '%s': %s\n", name, type, domain,
556
avahi_strerror(avahi_server_errno(server)));
744
557
break;
745
558
746
559
case AVAHI_RESOLVER_FOUND:
748
561
char ip[AVAHI_ADDRESS_STR_MAX];
749
562
avahi_address_snprint(ip, sizeof(ip), address);
750
563
if(debug){
751
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
752
PRIu16 ") on port %d\n", name, host_name, ip,
753
interface, port);
564
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
565
" port %d\n", name, host_name, ip, port);
754
566
}
755
int ret = start_mandos_communication(ip, port, interface, mc);
756
if(ret == 0){
757
avahi_simple_poll_quit(mc->simple_poll);
567
int ret = start_mandos_communication(ip, port,
568
(unsigned int) interface);
569
if (ret == 0){
570
exit(EXIT_SUCCESS);
758
571
}
759
572
}
760
573
}
761
574
avahi_s_service_resolver_free(r);
762
575
}
763
576
764
static void browse_callback( AvahiSServiceBrowser *b,
765
AvahiIfIndex interface,
766
AvahiProtocol protocol,
767
AvahiBrowserEvent event,
768
const char *name,
769
const char *type,
770
const char *domain,
771
AVAHI_GCC_UNUSED AvahiLookupResultFlags
772
flags,
773
void* userdata) {
774
mandos_context *mc = userdata;
775
assert(b);
776
777
/* Called whenever a new services becomes available on the LAN or
778
is removed from the LAN */
779
780
switch(event) {
781
default:
782
case AVAHI_BROWSER_FAILURE:
783
784
fprintf(stderr, "(Avahi browser) %s\n",
785
avahi_strerror(avahi_server_errno(mc->server)));
786
avahi_simple_poll_quit(mc->simple_poll);
787
return;
788
789
case AVAHI_BROWSER_NEW:
790
/* We ignore the returned Avahi resolver object. In the callback
791
function we free it. If the Avahi server is terminated before
792
the callback function is called the Avahi server will free the
793
resolver for us. */
794
795
if(!(avahi_s_service_resolver_new(mc->server, interface,
796
protocol, name, type, domain,
797
AVAHI_PROTO_INET6, 0,
798
resolve_callback, mc)))
799
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
800
name, avahi_strerror(avahi_server_errno(mc->server)));
801
break;
802
803
case AVAHI_BROWSER_REMOVE:
804
break;
805
806
case AVAHI_BROWSER_ALL_FOR_NOW:
807
case AVAHI_BROWSER_CACHE_EXHAUSTED:
808
if(debug){
809
fprintf(stderr, "No Mandos server found, still searching...\n");
577
static void browse_callback(
578
AvahiSServiceBrowser *b,
579
AvahiIfIndex interface,
580
AvahiProtocol protocol,
581
AvahiBrowserEvent event,
582
const char *name,
583
const char *type,
584
const char *domain,
585
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
586
void* userdata) {
587
588
AvahiServer *s = userdata;
589
assert(b); /* Spurious warning */
590
591
/* Called whenever a new services becomes available on the LAN or
592
is removed from the LAN */
593
594
switch (event) {
595
default:
596
case AVAHI_BROWSER_FAILURE:
597
598
fprintf(stderr, "(Browser) %s\n",
599
avahi_strerror(avahi_server_errno(server)));
600
avahi_simple_poll_quit(simple_poll);
601
return;
602
603
case AVAHI_BROWSER_NEW:
604
/* We ignore the returned resolver object. In the callback
605
function we free it. If the server is terminated before
606
the callback function is called the server will free
607
the resolver for us. */
608
609
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
610
type, domain,
611
AVAHI_PROTO_INET6, 0,
612
resolve_callback, s)))
613
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
614
avahi_strerror(avahi_server_errno(s)));
615
break;
616
617
case AVAHI_BROWSER_REMOVE:
618
break;
619
620
case AVAHI_BROWSER_ALL_FOR_NOW:
621
case AVAHI_BROWSER_CACHE_EXHAUSTED:
622
break;
810
623
}
811
break;
812
}
813
624
}
814
625
815
int main(int argc, char *argv[]){
626
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
627
AvahiServerConfig config;
816
628
AvahiSServiceBrowser *sb = NULL;
817
629
int error;
818
630
int ret;
819
int exitcode = EXIT_SUCCESS;
631
int returncode = EXIT_SUCCESS;
820
632
const char *interface = "eth0";
821
struct ifreq network;
822
int sd;
823
uid_t uid;
824
gid_t gid;
633
unsigned int if_index;
825
634
char *connect_to = NULL;
826
char tempdir[] = "/tmp/mandosXXXXXX";
827
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
828
const char *seckey = PATHDIR "/" SECKEY;
829
const char *pubkey = PATHDIR "/" PUBKEY;
830
831
mandos_context mc = { .simple_poll = NULL, .server = NULL,
832
.dh_bits = 1024, .priority = "SECURE256"
833
":!CTYPE-X.509:+CTYPE-OPENPGP" };
834
bool gnutls_initalized = false;
835
bool gpgme_initalized = false;
836
837
{
838
struct argp_option options[] = {
839
{ .name = "debug", .key = 128,
840
.doc = "Debug mode", .group = 3 },
841
{ .name = "connect", .key = 'c',
842
.arg = "ADDRESS:PORT",
843
.doc = "Connect directly to a specific Mandos server",
844
.group = 1 },
845
{ .name = "interface", .key = 'i',
846
.arg = "NAME",
847
.doc = "Interface that will be used to search for Mandos"
848
" servers",
849
.group = 1 },
850
{ .name = "seckey", .key = 's',
851
.arg = "FILE",
852
.doc = "OpenPGP secret key file base name",
853
.group = 1 },
854
{ .name = "pubkey", .key = 'p',
855
.arg = "FILE",
856
.doc = "OpenPGP public key file base name",
857
.group = 2 },
858
{ .name = "dh-bits", .key = 129,
859
.arg = "BITS",
860
.doc = "Bit length of the prime number used in the"
861
" Diffie-Hellman key exchange",
862
.group = 2 },
863
{ .name = "priority", .key = 130,
864
.arg = "STRING",
865
.doc = "GnuTLS priority string for the TLS handshake",
866
.group = 1 },
867
{ .name = NULL }
868
};
869
870
error_t parse_opt(int key, char *arg,
871
struct argp_state *state) {
872
switch(key) {
873
case 128: /* --debug */
874
debug = true;
875
break;
876
case 'c': /* --connect */
877
connect_to = arg;
878
break;
879
case 'i': /* --interface */
880
interface = arg;
881
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
889
ret = sscanf(arg, "%u", &mc.dh_bits);
890
if(ret != 1){
891
fprintf(stderr, "Bad number of DH bits\n");
892
exit(EXIT_FAILURE);
893
}
894
break;
895
case 130: /* --priority */
896
mc.priority = arg;
897
break;
898
case ARGP_KEY_ARG:
899
argp_usage(state);
900
case ARGP_KEY_END:
901
break;
902
default:
903
return ARGP_ERR_UNKNOWN;
904
}
905
return 0;
906
}
907
908
struct argp argp = { .options = options, .parser = parse_opt,
909
.args_doc = "",
910
.doc = "Mandos client -- Get and decrypt"
911
" passwords from a Mandos server" };
912
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
913
if(ret == ARGP_ERR_UNKNOWN){
914
fprintf(stderr, "Unknown error while parsing arguments\n");
915
exitcode = EXIT_FAILURE;
916
goto end;
917
}
918
}
919
920
/* If the interface is down, bring it up */
921
{
922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
923
if(sd < 0) {
924
perror("socket");
925
exitcode = EXIT_FAILURE;
926
goto end;
927
}
928
strcpy(network.ifr_name, interface);
929
ret = ioctl(sd, SIOCGIFFLAGS, &network);
930
if(ret == -1){
931
perror("ioctl SIOCGIFFLAGS");
932
exitcode = EXIT_FAILURE;
933
goto end;
934
}
935
if((network.ifr_flags & IFF_UP) == 0){
936
network.ifr_flags |= IFF_UP;
937
ret = ioctl(sd, SIOCSIFFLAGS, &network);
938
if(ret == -1){
939
perror("ioctl SIOCSIFFLAGS");
940
exitcode = EXIT_FAILURE;
941
goto end;
942
}
943
}
944
ret = (int)TEMP_FAILURE_RETRY(close(sd));
945
if(ret == -1){
946
perror("close");
947
}
948
}
949
950
uid = getuid();
951
gid = getgid();
952
953
ret = setuid(uid);
954
if(ret == -1){
955
perror("setuid");
956
}
957
958
setgid(gid);
959
if(ret == -1){
960
perror("setgid");
961
}
962
963
ret = init_gnutls_global(&mc, pubkey, seckey);
964
if(ret == -1){
965
fprintf(stderr, "init_gnutls_global failed\n");
966
exitcode = EXIT_FAILURE;
967
goto end;
968
} else {
969
gnutls_initalized = true;
970
}
971
972
if(mkdtemp(tempdir) == NULL){
973
perror("mkdtemp");
974
tempdir[0] = '\0';
975
goto end;
976
}
977
978
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
979
fprintf(stderr, "gpgme_initalized failed\n");
980
exitcode = EXIT_FAILURE;
981
goto end;
982
} else {
983
gpgme_initalized = true;
984
}
985
986
if_index = (AvahiIfIndex) if_nametoindex(interface);
635
636
while (true){
637
static struct option long_options[] = {
638
{"debug", no_argument, (int *)&debug, 1},
639
{"connect", required_argument, 0, 'c'},
640
{"interface", required_argument, 0, 'i'},
641
{0, 0, 0, 0} };
642
643
int option_index = 0;
644
ret = getopt_long (argc, argv, "i:", long_options,
645
&option_index);
646
647
if (ret == -1){
648
break;
649
}
650
651
switch(ret){
652
case 0:
653
break;
654
case 'i':
655
interface = optarg;
656
break;
657
case 'c':
658
connect_to = optarg;
659
break;
660
default:
661
exit(EXIT_FAILURE);
662
}
663
}
664
665
if_index = if_nametoindex(interface);
987
666
if(if_index == 0){
988
667
fprintf(stderr, "No such interface: \"%s\"\n", interface);
989
668
exit(EXIT_FAILURE);
995
674
char *address = strrchr(connect_to, ':');
996
675
if(address == NULL){
997
676
fprintf(stderr, "No colon in address\n");
998
exitcode = EXIT_FAILURE;
999
goto end;
677
exit(EXIT_FAILURE);
1000
678
}
1001
uint16_t port;
1002
ret = sscanf(address+1, "%" SCNu16, &port);
1003
if(ret != 1){
1004
fprintf(stderr, "Bad port number\n");
1005
exitcode = EXIT_FAILURE;
1006
goto end;
679
errno = 0;
680
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
681
if(errno){
682
perror("Bad port number");
683
exit(EXIT_FAILURE);
1007
684
}
1008
685
*address = '\0';
1009
686
address = connect_to;
1010
ret = start_mandos_communication(address, port, if_index, &mc);
687
ret = start_mandos_communication(address, port, if_index);
1011
688
if(ret < 0){
1012
exitcode = EXIT_FAILURE;
689
exit(EXIT_FAILURE);
1013
690
} else {
1014
exitcode = EXIT_SUCCESS;
691
exit(EXIT_SUCCESS);
1015
692
}
1016
goto end;
1017
693
}
1018
694
1019
if(not debug){
695
if (not debug){
1020
696
avahi_set_log_function(empty_log);
1021
697
}
1022
698
1023
/* Initialize the pseudo-RNG for Avahi */
699
/* Initialize the psuedo-RNG */
1024
700
srand((unsigned int) time(NULL));
1025
1026
/* Allocate main Avahi loop object */
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if(mc.simple_poll == NULL) {
1029
fprintf(stderr, "Avahi: Failed to create simple poll"
1030
" object.\n");
1031
exitcode = EXIT_FAILURE;
1032
goto end;
1033
}
1034
1035
{
1036
AvahiServerConfig config;
1037
/* Do not publish any local Zeroconf records */
1038
avahi_server_config_init(&config);
1039
config.publish_hinfo = 0;
1040
config.publish_addresses = 0;
1041
config.publish_workstation = 0;
1042
config.publish_domain = 0;
1043
1044
/* Allocate a new server */
1045
mc.server = avahi_server_new(avahi_simple_poll_get
1046
(mc.simple_poll), &config, NULL,
1047
NULL, &error);
1048
1049
/* Free the Avahi configuration data */
1050
avahi_server_config_free(&config);
1051
}
1052
1053
/* Check if creating the Avahi server object succeeded */
1054
if(mc.server == NULL) {
1055
fprintf(stderr, "Failed to create Avahi server: %s\n",
701
702
/* Allocate main loop object */
703
if (!(simple_poll = avahi_simple_poll_new())) {
704
fprintf(stderr, "Failed to create simple poll object.\n");
705
706
goto exit;
707
}
708
709
/* Do not publish any local records */
710
avahi_server_config_init(&config);
711
config.publish_hinfo = 0;
712
config.publish_addresses = 0;
713
config.publish_workstation = 0;
714
config.publish_domain = 0;
715
716
/* Allocate a new server */
717
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
718
&config, NULL, NULL, &error);
719
720
/* Free the configuration data */
721
avahi_server_config_free(&config);
722
723
/* Check if creating the server object succeeded */
724
if (!server) {
725
fprintf(stderr, "Failed to create server: %s\n",
1056
726
avahi_strerror(error));
1057
exitcode = EXIT_FAILURE;
1058
goto end;
727
returncode = EXIT_FAILURE;
728
goto exit;
1059
729
}
1060
730
1061
/* Create the Avahi service browser */
1062
sb = avahi_s_service_browser_new(mc.server, if_index,
731
/* Create the service browser */
732
sb = avahi_s_service_browser_new(server, (AvahiIfIndex)if_index,
1063
733
AVAHI_PROTO_INET6,
1064
734
"_mandos._tcp", NULL, 0,
1065
browse_callback, &mc);
1066
if(sb == NULL) {
735
browse_callback, server);
736
if (!sb) {
1067
737
fprintf(stderr, "Failed to create service browser: %s\n",
1068
avahi_strerror(avahi_server_errno(mc.server)));
1069
exitcode = EXIT_FAILURE;
1070
goto end;
738
avahi_strerror(avahi_server_errno(server)));
739
returncode = EXIT_FAILURE;
740
goto exit;
1071
741
}
1072
742
1073
743
/* Run the main loop */
1074
1075
if(debug){
1076
fprintf(stderr, "Starting Avahi loop search\n");
744
745
if (debug){
746
fprintf(stderr, "Starting avahi loop search\n");
1077
747
}
1078
748
1079
avahi_simple_poll_loop(mc.simple_poll);
1080
1081
end:
1082
1083
if(debug){
749
avahi_simple_poll_loop(simple_poll);
750
751
exit:
752
753
if (debug){
1084
754
fprintf(stderr, "%s exiting\n", argv[0]);
1085
755
}
1086
756
1087
757
/* Cleanup things */
1088
if(sb != NULL)
758
if (sb)
1089
759
avahi_s_service_browser_free(sb);
1090
760
1091
if(mc.server != NULL)
1092
avahi_server_free(mc.server);
1093
1094
if(mc.simple_poll != NULL)
1095
avahi_simple_poll_free(mc.simple_poll);
1096
1097
if(gnutls_initalized){
1098
gnutls_certificate_free_credentials(mc.cred);
1099
gnutls_global_deinit();
1100
gnutls_dh_params_deinit(mc.dh_params);
1101
}
1102
1103
if(gpgme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
if(errno != ENOENT){
1114
perror("opendir");
1115
}
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if(direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1 and errno != ENOENT){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
761
if (server)
762
avahi_server_free(server);
763
764
if (simple_poll)
765
avahi_simple_poll_free(simple_poll);
766
767
return returncode;
1147
768
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0