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- Committer: Teddy Hogeborn
- Date: 2009-01-29 22:22:32 UTC
- Revision ID: teddy@fukt.bsnet.se-20090129222232-p9hqnq338nsvxayp
* mandos (main): Bug fix: Do setgid before setuid. Add verbose GnuTLS
debugging messages.
* plugins.d/mandos-client.c (main): Bug fix: Do setgid before setuid.
debugging messages.
* plugins.d/mandos-client.c (main): Bug fix: Do setgid before setuid.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- plugins.d/password-request.c => plugins.d/mandos-client.c
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
3
* Mandos-client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
32
33
#define _LARGEFILE_SOURCE
33
34
#define _FILE_OFFSET_BITS 64
34
35
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
41
#include <stdint.h> /* uint16_t, uint32_t */
42
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
46
#include <string.h> /* memset(), strcmp(), strlen(),
47
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* time() */
44
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
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 */
46
78
79
/* Avahi */
80
/* All Avahi types, constants and functions
81
Avahi*, avahi_*,
82
AVAHI_* */
47
83
#include <avahi-core/core.h>
48
84
#include <avahi-core/lookup.h>
49
85
#include <avahi-core/log.h>
51
87
#include <avahi-common/malloc.h>
52
88
#include <avahi-common/error.h>
53
89
54
/* Mandos client part */
55
#include <sys/types.h> /* socket(), inet_pton() */
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
struct in6_addr, inet_pton() */
58
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
59
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
90
/* GnuTLS */
91
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
92
functions:
93
gnutls_*
94
init_gnutls_session(),
95
GNUTLS_* */
96
#include <gnutls/openpgp.h>
97
/* gnutls_certificate_set_openpgp_key_file(),
98
GNUTLS_OPENPGP_FMT_BASE64 */
60
99
61
#include <unistd.h> /* close() */
62
#include <netinet/in.h>
63
#include <stdbool.h> /* true */
64
#include <string.h> /* memset */
65
#include <arpa/inet.h> /* inet_pton() */
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
71
100
/* GPGME */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
101
#include <gpgme.h> /* All GPGME types, constants and
102
functions:
103
gpgme_*
104
GPGME_PROTOCOL_OpenPGP,
105
GPG_ERR_NO_* */
74
106
75
107
#define BUFFER_SIZE 256
76
108
109
#define PATHDIR "/conf/conf.d/mandos"
110
#define SECKEY "seckey.txt"
111
#define PUBKEY "pubkey.txt"
112
77
113
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
79
114
static const char mandos_protocol_version[] = "1";
80
const char *argp_program_version = "mandosclient 0.9";
115
const char *argp_program_version = "mandos-client " VERSION;
81
116
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
117
83
118
/* Used for passing in values through the Avahi callback functions */
88
123
unsigned int dh_bits;
89
124
gnutls_dh_params_t dh_params;
90
125
const char *priority;
126
gpgme_ctx_t ctx;
91
127
} mandos_context;
92
128
93
129
/*
97
133
*/
98
134
size_t adjustbuffer(char **buffer, size_t buffer_length,
99
135
size_t buffer_capacity){
100
if (buffer_length + BUFFER_SIZE > buffer_capacity){
136
if(buffer_length + BUFFER_SIZE > buffer_capacity){
101
137
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
102
if (buffer == NULL){
138
if(buffer == NULL){
103
139
return 0;
104
140
}
105
141
buffer_capacity += BUFFER_SIZE;
108
144
}
109
145
110
146
/*
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
147
* Initialize GPGME.
113
148
*/
114
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
size_t crypto_size,
116
char **plaintext,
117
const char *homedir){
118
gpgme_data_t dh_crypto, dh_plain;
119
gpgme_ctx_t ctx;
149
static bool init_gpgme(mandos_context *mc, const char *seckey,
150
const char *pubkey, const char *tempdir){
151
int ret;
120
152
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
124
153
gpgme_engine_info_t engine_info;
125
154
126
if (debug){
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
155
156
/*
157
* Helper function to insert pub and seckey to the engine keyring.
158
*/
159
bool import_key(const char *filename){
160
int fd;
161
gpgme_data_t pgp_data;
162
163
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
164
if(fd == -1){
165
perror("open");
166
return false;
167
}
168
169
rc = gpgme_data_new_from_fd(&pgp_data, fd);
170
if(rc != GPG_ERR_NO_ERROR){
171
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
172
gpgme_strsource(rc), gpgme_strerror(rc));
173
return false;
174
}
175
176
rc = gpgme_op_import(mc->ctx, pgp_data);
177
if(rc != GPG_ERR_NO_ERROR){
178
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
179
gpgme_strsource(rc), gpgme_strerror(rc));
180
return false;
181
}
182
183
ret = (int)TEMP_FAILURE_RETRY(close(fd));
184
if(ret == -1){
185
perror("close");
186
}
187
gpgme_data_release(pgp_data);
188
return true;
189
}
190
191
if(debug){
192
fprintf(stderr, "Initialize gpgme\n");
128
193
}
129
194
130
195
/* Init GPGME */
131
196
gpgme_check_version(NULL);
132
197
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
133
if (rc != GPG_ERR_NO_ERROR){
198
if(rc != GPG_ERR_NO_ERROR){
134
199
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
135
200
gpgme_strsource(rc), gpgme_strerror(rc));
136
return -1;
201
return false;
137
202
}
138
203
139
/* Set GPGME home directory for the OpenPGP engine only */
140
rc = gpgme_get_engine_info (&engine_info);
141
if (rc != GPG_ERR_NO_ERROR){
204
/* Set GPGME home directory for the OpenPGP engine only */
205
rc = gpgme_get_engine_info(&engine_info);
206
if(rc != GPG_ERR_NO_ERROR){
142
207
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
143
208
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
209
return false;
145
210
}
146
211
while(engine_info != NULL){
147
212
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
148
213
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
149
engine_info->file_name, homedir);
214
engine_info->file_name, tempdir);
150
215
break;
151
216
}
152
217
engine_info = engine_info->next;
153
218
}
154
219
if(engine_info == NULL){
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
220
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
221
return false;
222
}
223
224
/* Create new GPGME "context" */
225
rc = gpgme_new(&(mc->ctx));
226
if(rc != GPG_ERR_NO_ERROR){
227
fprintf(stderr, "bad gpgme_new: %s: %s\n",
228
gpgme_strsource(rc), gpgme_strerror(rc));
229
return false;
230
}
231
232
if(not import_key(pubkey) or not import_key(seckey)){
233
return false;
234
}
235
236
return true;
237
}
238
239
/*
240
* Decrypt OpenPGP data.
241
* Returns -1 on error
242
*/
243
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
244
const char *cryptotext,
245
size_t crypto_size,
246
char **plaintext){
247
gpgme_data_t dh_crypto, dh_plain;
248
gpgme_error_t rc;
249
ssize_t ret;
250
size_t plaintext_capacity = 0;
251
ssize_t plaintext_length = 0;
252
253
if(debug){
254
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
157
255
}
158
256
159
257
/* Create new GPGME data buffer from memory cryptotext */
160
258
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
161
259
0);
162
if (rc != GPG_ERR_NO_ERROR){
260
if(rc != GPG_ERR_NO_ERROR){
163
261
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
164
262
gpgme_strsource(rc), gpgme_strerror(rc));
165
263
return -1;
167
265
168
266
/* Create new empty GPGME data buffer for the plaintext */
169
267
rc = gpgme_data_new(&dh_plain);
170
if (rc != GPG_ERR_NO_ERROR){
268
if(rc != GPG_ERR_NO_ERROR){
171
269
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
172
270
gpgme_strsource(rc), gpgme_strerror(rc));
173
271
gpgme_data_release(dh_crypto);
174
272
return -1;
175
273
}
176
274
177
/* Create new GPGME "context" */
178
rc = gpgme_new(&ctx);
179
if (rc != GPG_ERR_NO_ERROR){
180
fprintf(stderr, "bad gpgme_new: %s: %s\n",
181
gpgme_strsource(rc), gpgme_strerror(rc));
182
plaintext_length = -1;
183
goto decrypt_end;
184
}
185
186
275
/* Decrypt data from the cryptotext data buffer to the plaintext
187
276
data buffer */
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
189
if (rc != GPG_ERR_NO_ERROR){
277
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
278
if(rc != GPG_ERR_NO_ERROR){
190
279
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
191
280
gpgme_strsource(rc), gpgme_strerror(rc));
192
281
plaintext_length = -1;
282
if(debug){
283
gpgme_decrypt_result_t result;
284
result = gpgme_op_decrypt_result(mc->ctx);
285
if(result == NULL){
286
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
287
} else {
288
fprintf(stderr, "Unsupported algorithm: %s\n",
289
result->unsupported_algorithm);
290
fprintf(stderr, "Wrong key usage: %u\n",
291
result->wrong_key_usage);
292
if(result->file_name != NULL){
293
fprintf(stderr, "File name: %s\n", result->file_name);
294
}
295
gpgme_recipient_t recipient;
296
recipient = result->recipients;
297
if(recipient){
298
while(recipient != NULL){
299
fprintf(stderr, "Public key algorithm: %s\n",
300
gpgme_pubkey_algo_name(recipient->pubkey_algo));
301
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
302
fprintf(stderr, "Secret key available: %s\n",
303
recipient->status == GPG_ERR_NO_SECKEY
304
? "No" : "Yes");
305
recipient = recipient->next;
306
}
307
}
308
}
309
}
193
310
goto decrypt_end;
194
311
}
195
312
197
314
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
198
315
}
199
316
200
if (debug){
201
gpgme_decrypt_result_t result;
202
result = gpgme_op_decrypt_result(ctx);
203
if (result == NULL){
204
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
205
} else {
206
fprintf(stderr, "Unsupported algorithm: %s\n",
207
result->unsupported_algorithm);
208
fprintf(stderr, "Wrong key usage: %d\n",
209
result->wrong_key_usage);
210
if(result->file_name != NULL){
211
fprintf(stderr, "File name: %s\n", result->file_name);
212
}
213
gpgme_recipient_t recipient;
214
recipient = result->recipients;
215
if(recipient){
216
while(recipient != NULL){
217
fprintf(stderr, "Public key algorithm: %s\n",
218
gpgme_pubkey_algo_name(recipient->pubkey_algo));
219
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
220
fprintf(stderr, "Secret key available: %s\n",
221
recipient->status == GPG_ERR_NO_SECKEY
222
? "No" : "Yes");
223
recipient = recipient->next;
224
}
225
}
226
}
227
}
228
229
317
/* Seek back to the beginning of the GPGME plaintext data buffer */
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
231
perror("pgpme_data_seek");
318
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
319
perror("gpgme_data_seek");
232
320
plaintext_length = -1;
233
321
goto decrypt_end;
234
322
}
238
326
plaintext_capacity = adjustbuffer(plaintext,
239
327
(size_t)plaintext_length,
240
328
plaintext_capacity);
241
if (plaintext_capacity == 0){
329
if(plaintext_capacity == 0){
242
330
perror("adjustbuffer");
243
331
plaintext_length = -1;
244
332
goto decrypt_end;
247
335
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
248
336
BUFFER_SIZE);
249
337
/* Print the data, if any */
250
if (ret == 0){
338
if(ret == 0){
251
339
/* EOF */
252
340
break;
253
341
}
258
346
}
259
347
plaintext_length += ret;
260
348
}
261
349
262
350
if(debug){
263
351
fprintf(stderr, "Decrypted password is: ");
264
352
for(ssize_t i = 0; i < plaintext_length; i++){
277
365
return plaintext_length;
278
366
}
279
367
280
static const char * safer_gnutls_strerror (int value) {
281
const char *ret = gnutls_strerror (value);
282
if (ret == NULL)
368
static const char * safer_gnutls_strerror(int value) {
369
const char *ret = gnutls_strerror(value); /* Spurious warning from
370
-Wunreachable-code */
371
if(ret == NULL)
283
372
ret = "(unknown)";
284
373
return ret;
285
374
}
291
380
}
292
381
293
382
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
383
const char *pubkeyfilename,
384
const char *seckeyfilename){
296
385
int ret;
297
386
298
387
if(debug){
299
388
fprintf(stderr, "Initializing GnuTLS\n");
300
389
}
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "GnuTLS global_init: %s\n",
305
safer_gnutls_strerror(ret));
390
391
ret = gnutls_global_init();
392
if(ret != GNUTLS_E_SUCCESS) {
393
fprintf(stderr, "GnuTLS global_init: %s\n",
394
safer_gnutls_strerror(ret));
306
395
return -1;
307
396
}
308
397
309
if (debug){
398
if(debug){
310
399
/* "Use a log level over 10 to enable all debugging options."
311
400
* - GnuTLS manual
312
401
*/
315
404
}
316
405
317
406
/* OpenPGP credentials */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
321
safer_gnutls_strerror(ret));
322
gnutls_global_deinit ();
407
gnutls_certificate_allocate_credentials(&mc->cred);
408
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
410
* from
411
* -Wunreachable-code
412
*/
413
safer_gnutls_strerror(ret));
414
gnutls_global_deinit();
323
415
return -1;
324
416
}
325
417
326
418
if(debug){
327
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
328
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
329
seckeyfile);
419
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
420
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
421
seckeyfilename);
330
422
}
331
423
332
424
ret = gnutls_certificate_set_openpgp_key_file
333
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
334
if (ret != GNUTLS_E_SUCCESS) {
425
(mc->cred, pubkeyfilename, seckeyfilename,
426
GNUTLS_OPENPGP_FMT_BASE64);
427
if(ret != GNUTLS_E_SUCCESS) {
335
428
fprintf(stderr,
336
429
"Error[%d] while reading the OpenPGP key pair ('%s',"
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
430
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
431
fprintf(stderr, "The GnuTLS error is: %s\n",
339
432
safer_gnutls_strerror(ret));
340
433
goto globalfail;
341
434
}
342
435
343
436
/* GnuTLS server initialization */
344
437
ret = gnutls_dh_params_init(&mc->dh_params);
345
if (ret != GNUTLS_E_SUCCESS) {
346
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
347
" %s\n", safer_gnutls_strerror(ret));
438
if(ret != GNUTLS_E_SUCCESS) {
439
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
440
" %s\n", safer_gnutls_strerror(ret));
348
441
goto globalfail;
349
442
}
350
443
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
351
if (ret != GNUTLS_E_SUCCESS) {
352
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
353
safer_gnutls_strerror(ret));
444
if(ret != GNUTLS_E_SUCCESS) {
445
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
446
safer_gnutls_strerror(ret));
354
447
goto globalfail;
355
448
}
356
449
357
450
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
358
451
359
452
return 0;
360
453
361
454
globalfail:
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
455
456
gnutls_certificate_free_credentials(mc->cred);
457
gnutls_global_deinit();
458
gnutls_dh_params_deinit(mc->dh_params);
365
459
return -1;
366
367
460
}
368
461
369
462
static int init_gnutls_session(mandos_context *mc,
371
464
int ret;
372
465
/* GnuTLS session creation */
373
466
ret = gnutls_init(session, GNUTLS_SERVER);
374
if (ret != GNUTLS_E_SUCCESS){
467
if(ret != GNUTLS_E_SUCCESS){
375
468
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
376
469
safer_gnutls_strerror(ret));
377
470
}
379
472
{
380
473
const char *err;
381
474
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
382
if (ret != GNUTLS_E_SUCCESS) {
475
if(ret != GNUTLS_E_SUCCESS) {
383
476
fprintf(stderr, "Syntax error at: %s\n", err);
384
477
fprintf(stderr, "GnuTLS error: %s\n",
385
478
safer_gnutls_strerror(ret));
386
gnutls_deinit (*session);
479
gnutls_deinit(*session);
387
480
return -1;
388
481
}
389
482
}
390
483
391
484
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
392
485
mc->cred);
393
if (ret != GNUTLS_E_SUCCESS) {
486
if(ret != GNUTLS_E_SUCCESS) {
394
487
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
395
488
safer_gnutls_strerror(ret));
396
gnutls_deinit (*session);
489
gnutls_deinit(*session);
397
490
return -1;
398
491
}
399
492
400
493
/* ignore client certificate if any. */
401
gnutls_certificate_server_set_request (*session,
402
GNUTLS_CERT_IGNORE);
494
gnutls_certificate_server_set_request(*session,
495
GNUTLS_CERT_IGNORE);
403
496
404
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
497
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
405
498
406
499
return 0;
407
500
}
415
508
AvahiIfIndex if_index,
416
509
mandos_context *mc){
417
510
int ret, tcp_sd;
511
ssize_t sret;
418
512
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
419
513
char *buffer = NULL;
420
514
char *decrypted_buffer;
426
520
char interface[IF_NAMESIZE];
427
521
gnutls_session_t session;
428
522
429
ret = init_gnutls_session (mc, &session);
430
if (ret != 0){
523
ret = init_gnutls_session(mc, &session);
524
if(ret != 0){
431
525
return -1;
432
526
}
433
527
434
528
if(debug){
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
529
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
530
"\n", ip, port);
437
531
}
438
532
439
533
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
441
535
perror("socket");
442
536
return -1;
443
537
}
444
538
445
539
if(debug){
446
540
if(if_indextoname((unsigned int)if_index, interface) == NULL){
447
541
perror("if_indextoname");
450
544
fprintf(stderr, "Binding to interface %s\n", interface);
451
545
}
452
546
453
memset(&to,0,sizeof(to)); /* Spurious warning */
547
memset(&to, 0, sizeof(to));
454
548
to.in6.sin6_family = AF_INET6;
455
549
/* It would be nice to have a way to detect if we were passed an
456
550
IPv4 address here. Now we assume an IPv6 address. */
457
551
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
458
if (ret < 0 ){
552
if(ret < 0 ){
459
553
perror("inet_pton");
460
554
return -1;
461
555
}
463
557
fprintf(stderr, "Bad address: %s\n", ip);
464
558
return -1;
465
559
}
466
to.in6.sin6_port = htons(port); /* Spurious warning */
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
561
-Wconversion and
562
-Wunreachable-code */
467
563
468
564
to.in6.sin6_scope_id = (uint32_t)if_index;
469
565
470
566
if(debug){
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
567
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
568
port);
472
569
char addrstr[INET6_ADDRSTRLEN] = "";
473
570
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
474
571
sizeof(addrstr)) == NULL){
481
578
}
482
579
483
580
ret = connect(tcp_sd, &to.in, sizeof(to));
484
if (ret < 0){
581
if(ret < 0){
485
582
perror("connect");
486
583
return -1;
487
584
}
488
585
489
586
const char *out = mandos_protocol_version;
490
587
written = 0;
491
while (true){
588
while(true){
492
589
size_t out_size = strlen(out);
493
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
590
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
494
591
out_size - written));
495
if (ret == -1){
592
if(ret == -1){
496
593
perror("write");
497
594
retval = -1;
498
595
goto mandos_end;
501
598
if(written < out_size){
502
599
continue;
503
600
} else {
504
if (out == mandos_protocol_version){
601
if(out == mandos_protocol_version){
505
602
written = 0;
506
603
out = "\r\n";
507
604
} else {
509
606
}
510
607
}
511
608
}
512
609
513
610
if(debug){
514
611
fprintf(stderr, "Establishing TLS session with %s\n", ip);
515
612
}
516
613
517
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
518
519
ret = gnutls_handshake (session);
520
521
if (ret != GNUTLS_E_SUCCESS){
614
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
615
616
do{
617
ret = gnutls_handshake(session);
618
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
619
620
if(ret != GNUTLS_E_SUCCESS){
522
621
if(debug){
523
622
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
524
gnutls_perror (ret);
623
gnutls_perror(ret);
525
624
}
526
625
retval = -1;
527
626
goto mandos_end;
533
632
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
534
633
ip);
535
634
}
536
635
537
636
while(true){
538
637
buffer_capacity = adjustbuffer(&buffer, buffer_length,
539
638
buffer_capacity);
540
if (buffer_capacity == 0){
639
if(buffer_capacity == 0){
541
640
perror("adjustbuffer");
542
641
retval = -1;
543
642
goto mandos_end;
544
643
}
545
644
546
ret = gnutls_record_recv(session, buffer+buffer_length,
547
BUFFER_SIZE);
548
if (ret == 0){
645
sret = gnutls_record_recv(session, buffer+buffer_length,
646
BUFFER_SIZE);
647
if(sret == 0){
549
648
break;
550
649
}
551
if (ret < 0){
552
switch(ret){
650
if(sret < 0){
651
switch(sret){
553
652
case GNUTLS_E_INTERRUPTED:
554
653
case GNUTLS_E_AGAIN:
555
654
break;
556
655
case GNUTLS_E_REHANDSHAKE:
557
ret = gnutls_handshake (session);
558
if (ret < 0){
656
do{
657
ret = gnutls_handshake(session);
658
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
659
if(ret < 0){
559
660
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
560
gnutls_perror (ret);
661
gnutls_perror(ret);
561
662
retval = -1;
562
663
goto mandos_end;
563
664
}
566
667
fprintf(stderr, "Unknown error while reading data from"
567
668
" encrypted session with Mandos server\n");
568
669
retval = -1;
569
gnutls_bye (session, GNUTLS_SHUT_RDWR);
670
gnutls_bye(session, GNUTLS_SHUT_RDWR);
570
671
goto mandos_end;
571
672
}
572
673
} else {
573
buffer_length += (size_t) ret;
674
buffer_length += (size_t) sret;
574
675
}
575
676
}
576
677
578
679
fprintf(stderr, "Closing TLS session\n");
579
680
}
580
681
581
gnutls_bye (session, GNUTLS_SHUT_RDWR);
682
gnutls_bye(session, GNUTLS_SHUT_RDWR);
582
683
583
if (buffer_length > 0){
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
684
if(buffer_length > 0){
685
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
585
686
buffer_length,
586
&decrypted_buffer,
587
keydir);
588
if (decrypted_buffer_size >= 0){
687
&decrypted_buffer);
688
if(decrypted_buffer_size >= 0){
589
689
written = 0;
590
690
while(written < (size_t) decrypted_buffer_size){
591
ret = (int)fwrite (decrypted_buffer + written, 1,
592
(size_t)decrypted_buffer_size - written,
593
stdout);
691
ret = (int)fwrite(decrypted_buffer + written, 1,
692
(size_t)decrypted_buffer_size - written,
693
stdout);
594
694
if(ret == 0 and ferror(stdout)){
595
695
if(debug){
596
696
fprintf(stderr, "Error writing encrypted data: %s\n",
605
705
} else {
606
706
retval = -1;
607
707
}
708
} else {
709
retval = -1;
608
710
}
609
711
610
712
/* Shutdown procedure */
611
713
612
714
mandos_end:
613
715
free(buffer);
614
close(tcp_sd);
615
gnutls_deinit (session);
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
717
if(ret == -1){
718
perror("close");
719
}
720
gnutls_deinit(session);
616
721
return retval;
617
722
}
618
723
631
736
flags,
632
737
void* userdata) {
633
738
mandos_context *mc = userdata;
634
assert(r); /* Spurious warning */
739
assert(r);
635
740
636
741
/* Called whenever a service has been resolved successfully or
637
742
timed out */
638
743
639
switch (event) {
744
switch(event) {
640
745
default:
641
746
case AVAHI_RESOLVER_FAILURE:
642
747
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
649
754
char ip[AVAHI_ADDRESS_STR_MAX];
650
755
avahi_address_snprint(ip, sizeof(ip), address);
651
756
if(debug){
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
757
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
758
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
759
ip, (intmax_t)interface, port);
654
760
}
655
761
int ret = start_mandos_communication(ip, port, interface, mc);
656
if (ret == 0){
657
exit(EXIT_SUCCESS);
762
if(ret == 0){
763
avahi_simple_poll_quit(mc->simple_poll);
658
764
}
659
765
}
660
766
}
672
778
flags,
673
779
void* userdata) {
674
780
mandos_context *mc = userdata;
675
assert(b); /* Spurious warning */
781
assert(b);
676
782
677
783
/* Called whenever a new services becomes available on the LAN or
678
784
is removed from the LAN */
679
785
680
switch (event) {
786
switch(event) {
681
787
default:
682
788
case AVAHI_BROWSER_FAILURE:
683
789
692
798
the callback function is called the Avahi server will free the
693
799
resolver for us. */
694
800
695
if (!(avahi_s_service_resolver_new(mc->server, interface,
801
if(!(avahi_s_service_resolver_new(mc->server, interface,
696
802
protocol, name, type, domain,
697
803
AVAHI_PROTO_INET6, 0,
698
804
resolve_callback, mc)))
712
818
}
713
819
}
714
820
715
/* Combines file name and path and returns the malloced new
716
string. some sane checks could/should be added */
717
static const char *combinepath(const char *first, const char *second){
718
size_t f_len = strlen(first);
719
size_t s_len = strlen(second);
720
char *tmp = malloc(f_len + s_len + 2);
721
if (tmp == NULL){
722
return NULL;
723
}
724
if(f_len > 0){
725
memcpy(tmp, first, f_len); /* Spurious warning */
726
}
727
tmp[f_len] = '/';
728
if(s_len > 0){
729
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
730
}
731
tmp[f_len + 1 + s_len] = '\0';
732
return tmp;
733
}
734
735
736
821
int main(int argc, char *argv[]){
737
822
AvahiSServiceBrowser *sb = NULL;
738
823
int error;
739
824
int ret;
825
intmax_t tmpmax;
826
int numchars;
740
827
int exitcode = EXIT_SUCCESS;
741
828
const char *interface = "eth0";
742
829
struct ifreq network;
744
831
uid_t uid;
745
832
gid_t gid;
746
833
char *connect_to = NULL;
834
char tempdir[] = "/tmp/mandosXXXXXX";
835
bool tempdir_created = false;
747
836
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
837
const char *seckey = PATHDIR "/" SECKEY;
838
const char *pubkey = PATHDIR "/" PUBKEY;
839
750
840
mandos_context mc = { .simple_poll = NULL, .server = NULL,
751
.dh_bits = 1024, .priority = "SECURE256"};
752
bool gnutls_initalized = false;
841
.dh_bits = 1024, .priority = "SECURE256"
842
":!CTYPE-X.509:+CTYPE-OPENPGP" };
843
bool gnutls_initialized = false;
844
bool gpgme_initialized = false;
753
845
754
846
{
755
847
struct argp_option options[] = {
756
848
{ .name = "debug", .key = 128,
757
849
.doc = "Debug mode", .group = 3 },
758
850
{ .name = "connect", .key = 'c',
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
851
.arg = "ADDRESS:PORT",
852
.doc = "Connect directly to a specific Mandos server",
761
853
.group = 1 },
762
854
{ .name = "interface", .key = 'i',
763
.arg = "INTERFACE",
764
.doc = "Interface that Avahi will conntect through",
765
.group = 1 },
766
{ .name = "keydir", .key = 'd',
767
.arg = "KEYDIR",
768
.doc = "Directory where the openpgp keyring is",
855
.arg = "NAME",
856
.doc = "Interface that will be used to search for Mandos"
857
" servers",
769
858
.group = 1 },
770
859
{ .name = "seckey", .key = 's',
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
860
.arg = "FILE",
861
.doc = "OpenPGP secret key file base name",
773
862
.group = 1 },
774
863
{ .name = "pubkey", .key = 'p',
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
864
.arg = "FILE",
865
.doc = "OpenPGP public key file base name",
777
866
.group = 2 },
778
867
{ .name = "dh-bits", .key = 129,
779
868
.arg = "BITS",
780
.doc = "dh-bits to use in gnutls communication",
869
.doc = "Bit length of the prime number used in the"
870
" Diffie-Hellman key exchange",
781
871
.group = 2 },
782
872
{ .name = "priority", .key = 130,
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
873
.arg = "STRING",
874
.doc = "GnuTLS priority string for the TLS handshake",
875
.group = 1 },
785
876
{ .name = NULL }
786
877
};
787
788
878
789
error_t parse_opt (int key, char *arg,
790
struct argp_state *state) {
791
/* Get the INPUT argument from `argp_parse', which we know is
792
a pointer to our plugin list pointer. */
793
switch (key) {
794
case 128:
879
error_t parse_opt(int key, char *arg,
880
struct argp_state *state) {
881
switch(key) {
882
case 128: /* --debug */
795
883
debug = true;
796
884
break;
797
case 'c':
885
case 'c': /* --connect */
798
886
connect_to = arg;
799
887
break;
800
case 'i':
888
case 'i': /* --interface */
801
889
interface = arg;
802
890
break;
803
case 'd':
804
keydir = arg;
805
break;
806
case 's':
807
seckeyfile = arg;
808
break;
809
case 'p':
810
pubkeyfile = arg;
811
break;
812
case 129:
813
errno = 0;
814
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
815
if (errno){
816
perror("strtol");
891
case 's': /* --seckey */
892
seckey = arg;
893
break;
894
case 'p': /* --pubkey */
895
pubkey = arg;
896
break;
897
case 129: /* --dh-bits */
898
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
899
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
900
or arg[numchars] != '\0'){
901
fprintf(stderr, "Bad number of DH bits\n");
817
902
exit(EXIT_FAILURE);
818
903
}
904
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
819
905
break;
820
case 130:
906
case 130: /* --priority */
821
907
mc.priority = arg;
822
908
break;
823
909
case ARGP_KEY_ARG:
824
argp_usage (state);
910
argp_usage(state);
911
case ARGP_KEY_END:
825
912
break;
826
case ARGP_KEY_END:
827
break;
828
913
default:
829
914
return ARGP_ERR_UNKNOWN;
830
915
}
831
916
return 0;
832
917
}
833
918
834
919
struct argp argp = { .options = options, .parser = parse_opt,
835
920
.args_doc = "",
836
921
.doc = "Mandos client -- Get and decrypt"
837
" passwords from mandos server" };
838
argp_parse (&argp, argc, argv, 0, 0, NULL);
839
}
840
841
pubkeyfile = combinepath(keydir, pubkeyfile);
842
if (pubkeyfile == NULL){
843
perror("combinepath");
844
exitcode = EXIT_FAILURE;
845
goto end;
846
}
847
848
seckeyfile = combinepath(keydir, seckeyfile);
849
if (seckeyfile == NULL){
850
perror("combinepath");
851
goto end;
852
}
853
854
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
855
if (ret == -1){
856
fprintf(stderr, "init_gnutls_global\n");
857
goto end;
858
} else {
859
gnutls_initalized = true;
860
}
861
922
" passwords from a Mandos server" };
923
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
924
if(ret == ARGP_ERR_UNKNOWN){
925
fprintf(stderr, "Unknown error while parsing arguments\n");
926
exitcode = EXIT_FAILURE;
927
goto end;
928
}
929
}
930
931
/* If the interface is down, bring it up */
932
{
933
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
934
if(sd < 0) {
935
perror("socket");
936
exitcode = EXIT_FAILURE;
937
goto end;
938
}
939
strcpy(network.ifr_name, interface);
940
ret = ioctl(sd, SIOCGIFFLAGS, &network);
941
if(ret == -1){
942
perror("ioctl SIOCGIFFLAGS");
943
exitcode = EXIT_FAILURE;
944
goto end;
945
}
946
if((network.ifr_flags & IFF_UP) == 0){
947
network.ifr_flags |= IFF_UP;
948
ret = ioctl(sd, SIOCSIFFLAGS, &network);
949
if(ret == -1){
950
perror("ioctl SIOCSIFFLAGS");
951
exitcode = EXIT_FAILURE;
952
goto end;
953
}
954
}
955
ret = (int)TEMP_FAILURE_RETRY(close(sd));
956
if(ret == -1){
957
perror("close");
958
}
959
}
960
862
961
uid = getuid();
863
962
gid = getgid();
864
963
964
setgid(gid);
965
if(ret == -1){
966
perror("setgid");
967
}
968
865
969
ret = setuid(uid);
866
if (ret == -1){
970
if(ret == -1){
867
971
perror("setuid");
868
972
}
869
973
870
setgid(gid);
871
if (ret == -1){
872
perror("setgid");
974
ret = init_gnutls_global(&mc, pubkey, seckey);
975
if(ret == -1){
976
fprintf(stderr, "init_gnutls_global failed\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
} else {
980
gnutls_initialized = true;
981
}
982
983
if(mkdtemp(tempdir) == NULL){
984
perror("mkdtemp");
985
goto end;
986
}
987
tempdir_created = true;
988
989
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
990
fprintf(stderr, "init_gpgme failed\n");
991
exitcode = EXIT_FAILURE;
992
goto end;
993
} else {
994
gpgme_initialized = true;
873
995
}
874
996
875
997
if_index = (AvahiIfIndex) if_nametoindex(interface);
876
998
if(if_index == 0){
877
999
fprintf(stderr, "No such interface: \"%s\"\n", interface);
878
exit(EXIT_FAILURE);
1000
exitcode = EXIT_FAILURE;
1001
goto end;
879
1002
}
880
1003
881
1004
if(connect_to != NULL){
887
1010
exitcode = EXIT_FAILURE;
888
1011
goto end;
889
1012
}
890
errno = 0;
891
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
892
if(errno){
893
perror("Bad port number");
1013
uint16_t port;
1014
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1015
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1016
or address[numchars+1] != '\0'){
1017
fprintf(stderr, "Bad port number\n");
894
1018
exitcode = EXIT_FAILURE;
895
1019
goto end;
896
1020
}
1021
port = (uint16_t)tmpmax;
897
1022
*address = '\0';
898
1023
address = connect_to;
899
1024
ret = start_mandos_communication(address, port, if_index, &mc);
905
1030
goto end;
906
1031
}
907
1032
908
/* If the interface is down, bring it up */
909
{
910
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
911
if(sd < 0) {
912
perror("socket");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
strcpy(network.ifr_name, interface); /* Spurious warning */
917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
918
if(ret == -1){
919
perror("ioctl SIOCGIFFLAGS");
920
exitcode = EXIT_FAILURE;
921
goto end;
922
}
923
if((network.ifr_flags & IFF_UP) == 0){
924
network.ifr_flags |= IFF_UP;
925
ret = ioctl(sd, SIOCSIFFLAGS, &network);
926
if(ret == -1){
927
perror("ioctl SIOCSIFFLAGS");
928
exitcode = EXIT_FAILURE;
929
goto end;
930
}
931
}
932
close(sd);
933
}
934
935
if (not debug){
1033
if(not debug){
936
1034
avahi_set_log_function(empty_log);
937
1035
}
938
1036
941
1039
942
1040
/* Allocate main Avahi loop object */
943
1041
mc.simple_poll = avahi_simple_poll_new();
944
if (mc.simple_poll == NULL) {
1042
if(mc.simple_poll == NULL) {
945
1043
fprintf(stderr, "Avahi: Failed to create simple poll"
946
1044
" object.\n");
947
1045
exitcode = EXIT_FAILURE;
948
1046
goto end;
949
1047
}
950
1048
951
1049
{
952
1050
AvahiServerConfig config;
953
1051
/* Do not publish any local Zeroconf records */
956
1054
config.publish_addresses = 0;
957
1055
config.publish_workstation = 0;
958
1056
config.publish_domain = 0;
959
1057
960
1058
/* Allocate a new server */
961
1059
mc.server = avahi_server_new(avahi_simple_poll_get
962
1060
(mc.simple_poll), &config, NULL,
963
1061
NULL, &error);
964
1062
965
1063
/* Free the Avahi configuration data */
966
1064
avahi_server_config_free(&config);
967
1065
}
968
1066
969
1067
/* Check if creating the Avahi server object succeeded */
970
if (mc.server == NULL) {
1068
if(mc.server == NULL) {
971
1069
fprintf(stderr, "Failed to create Avahi server: %s\n",
972
1070
avahi_strerror(error));
973
1071
exitcode = EXIT_FAILURE;
979
1077
AVAHI_PROTO_INET6,
980
1078
"_mandos._tcp", NULL, 0,
981
1079
browse_callback, &mc);
982
if (sb == NULL) {
1080
if(sb == NULL) {
983
1081
fprintf(stderr, "Failed to create service browser: %s\n",
984
1082
avahi_strerror(avahi_server_errno(mc.server)));
985
1083
exitcode = EXIT_FAILURE;
987
1085
}
988
1086
989
1087
/* Run the main loop */
990
991
if (debug){
1088
1089
if(debug){
992
1090
fprintf(stderr, "Starting Avahi loop search\n");
993
1091
}
994
1092
995
1093
avahi_simple_poll_loop(mc.simple_poll);
996
1094
997
1095
end:
998
999
if (debug){
1096
1097
if(debug){
1000
1098
fprintf(stderr, "%s exiting\n", argv[0]);
1001
1099
}
1002
1100
1003
1101
/* Cleanup things */
1004
if (sb != NULL)
1102
if(sb != NULL)
1005
1103
avahi_s_service_browser_free(sb);
1006
1104
1007
if (mc.server != NULL)
1105
if(mc.server != NULL)
1008
1106
avahi_server_free(mc.server);
1009
1010
if (mc.simple_poll != NULL)
1107
1108
if(mc.simple_poll != NULL)
1011
1109
avahi_simple_poll_free(mc.simple_poll);
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1015
if (gnutls_initalized){
1016
gnutls_certificate_free_credentials (mc.cred);
1017
gnutls_global_deinit ();
1110
1111
if(gnutls_initialized){
1112
gnutls_certificate_free_credentials(mc.cred);
1113
gnutls_global_deinit();
1114
gnutls_dh_params_deinit(mc.dh_params);
1115
}
1116
1117
if(gpgme_initialized){
1118
gpgme_release(mc.ctx);
1119
}
1120
1121
/* Removes the temp directory used by GPGME */
1122
if(tempdir_created){
1123
DIR *d;
1124
struct dirent *direntry;
1125
d = opendir(tempdir);
1126
if(d == NULL){
1127
if(errno != ENOENT){
1128
perror("opendir");
1129
}
1130
} else {
1131
while(true){
1132
direntry = readdir(d);
1133
if(direntry == NULL){
1134
break;
1135
}
1136
/* Skip "." and ".." */
1137
if(direntry->d_name[0] == '.'
1138
and (direntry->d_name[1] == '\0'
1139
or (direntry->d_name[1] == '.'
1140
and direntry->d_name[2] == '\0'))){
1141
continue;
1142
}
1143
char *fullname = NULL;
1144
ret = asprintf(&fullname, "%s/%s", tempdir,
1145
direntry->d_name);
1146
if(ret < 0){
1147
perror("asprintf");
1148
continue;
1149
}
1150
ret = remove(fullname);
1151
if(ret == -1){
1152
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1153
strerror(errno));
1154
}
1155
free(fullname);
1156
}
1157
closedir(d);
1158
}
1159
ret = rmdir(tempdir);
1160
if(ret == -1 and errno != ENOENT){
1161
perror("rmdir");
1162
}
1018
1163
}
1019
1164
1020
1165
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0