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- Committer: Teddy Hogeborn
- Date: 2008-08-02 21:06:12 UTC
- Revision ID: teddy@fukt.bsnet.se-20080802210612-4c1waup4z0f66ya7
Non-tested commit for merge purposes.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
- files added:
- ca.pem
- files removed:
- initramfs-tools-hook
- files renamed:
- mandos-client.c => plugbasedclient.c
- plugins.d/password-request.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
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
ferror() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
SIOCSIFFLAGS, if_indextoname(),
60
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
63
setgid() */
64
#include <netinet/in.h>
65
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
67
#include <argp.h> /* struct argp_option, error_t, struct
68
argp_state, struct argp,
69
argp_parse(), ARGP_KEY_ARG,
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
71
72
/* Avahi */
73
/* All Avahi types, constants and functions
74
Avahi*, avahi_*,
75
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
76
41
#include <avahi-core/core.h>
77
42
#include <avahi-core/lookup.h>
78
43
#include <avahi-core/log.h>
80
45
#include <avahi-common/malloc.h>
81
46
#include <avahi-common/error.h>
82
47
83
/* GnuTLS */
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
85
gnutls_*
86
init_gnutls_session(),
87
GNUTLS_* */
88
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
89
GNUTLS_OPENPGP_FMT_BASE64 */
90
91
/* GPGME */
92
#include <gpgme.h> /* All GPGME types, constants and functions
93
gpgme_*
94
GPGME_PROTOCOL_OpenPGP,
95
GPG_ERR_NO_* */
48
//mandos client part
49
#include <sys/types.h> /* socket(), inet_pton() */
50
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
51
struct in6_addr, inet_pton() */
52
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
53
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
54
55
#include <unistd.h> /* close() */
56
#include <netinet/in.h>
57
#include <stdbool.h> /* true */
58
#include <string.h> /* memset */
59
#include <arpa/inet.h> /* inet_pton() */
60
#include <iso646.h> /* not */
61
62
// gpgme
63
#include <errno.h> /* perror() */
64
#include <gpgme.h>
65
66
// getopt_long
67
#include <getopt.h>
96
68
97
69
#define BUFFER_SIZE 256
98
70
71
static int dh_bits = 1024;
72
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
76
99
77
bool debug = false;
100
static const char *keydir = "/conf/conf.d/mandos";
101
static const char mandos_protocol_version[] = "1";
102
const char *argp_program_version = "password-request 1.0";
103
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
104
78
105
/* Used for passing in values through the Avahi callback functions */
79
/* Used for */
106
80
typedef struct {
107
AvahiSimplePoll *simple_poll;
108
AvahiServer *server;
81
gnutls_session_t session;
109
82
gnutls_certificate_credentials_t cred;
110
unsigned int dh_bits;
111
83
gnutls_dh_params_t dh_params;
112
const char *priority;
113
} mandos_context;
114
115
/*
116
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
117
* "buffer_capacity" is how much is currently allocated,
118
* "buffer_length" is how much is already used.
119
*/
120
size_t adjustbuffer(char **buffer, size_t buffer_length,
121
size_t buffer_capacity){
122
if (buffer_length + BUFFER_SIZE > buffer_capacity){
123
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
124
if (buffer == NULL){
125
return 0;
126
}
127
buffer_capacity += BUFFER_SIZE;
128
}
129
return buffer_capacity;
130
}
131
132
/*
133
* Decrypt OpenPGP data using keyrings in HOMEDIR.
134
* Returns -1 on error
135
*/
136
static ssize_t pgp_packet_decrypt (const char *cryptotext,
137
size_t crypto_size,
138
char **plaintext,
84
} encrypted_session;
85
86
87
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet,
139
89
const char *homedir){
140
90
gpgme_data_t dh_crypto, dh_plain;
141
91
gpgme_ctx_t ctx;
142
92
gpgme_error_t rc;
143
93
ssize_t ret;
144
size_t plaintext_capacity = 0;
145
ssize_t plaintext_length = 0;
94
ssize_t new_packet_capacity = 0;
95
ssize_t new_packet_length = 0;
146
96
gpgme_engine_info_t engine_info;
147
97
148
98
if (debug){
149
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
99
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
150
100
}
151
101
152
102
/* Init GPGME */
158
108
return -1;
159
109
}
160
110
161
/* Set GPGME home directory for the OpenPGP engine only */
111
/* Set GPGME home directory */
162
112
rc = gpgme_get_engine_info (&engine_info);
163
113
if (rc != GPG_ERR_NO_ERROR){
164
114
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
174
124
engine_info = engine_info->next;
175
125
}
176
126
if(engine_info == NULL){
177
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
127
fprintf(stderr, "Could not set home dir to %s\n", homedir);
178
128
return -1;
179
129
}
180
130
181
/* Create new GPGME data buffer from memory cryptotext */
182
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
183
0);
131
/* Create new GPGME data buffer from packet buffer */
132
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
184
133
if (rc != GPG_ERR_NO_ERROR){
185
134
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
186
135
gpgme_strsource(rc), gpgme_strerror(rc));
192
141
if (rc != GPG_ERR_NO_ERROR){
193
142
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
194
143
gpgme_strsource(rc), gpgme_strerror(rc));
195
gpgme_data_release(dh_crypto);
196
144
return -1;
197
145
}
198
146
201
149
if (rc != GPG_ERR_NO_ERROR){
202
150
fprintf(stderr, "bad gpgme_new: %s: %s\n",
203
151
gpgme_strsource(rc), gpgme_strerror(rc));
204
plaintext_length = -1;
205
goto decrypt_end;
152
return -1;
206
153
}
207
154
208
/* Decrypt data from the cryptotext data buffer to the plaintext
209
data buffer */
155
/* Decrypt data from the FILE pointer to the plaintext data
156
buffer */
210
157
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
211
158
if (rc != GPG_ERR_NO_ERROR){
212
159
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
213
160
gpgme_strsource(rc), gpgme_strerror(rc));
214
plaintext_length = -1;
215
goto decrypt_end;
161
return -1;
216
162
}
217
163
218
164
if(debug){
219
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
165
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
220
166
}
221
167
222
168
if (debug){
223
169
gpgme_decrypt_result_t result;
224
170
result = gpgme_op_decrypt_result(ctx);
227
173
} else {
228
174
fprintf(stderr, "Unsupported algorithm: %s\n",
229
175
result->unsupported_algorithm);
230
fprintf(stderr, "Wrong key usage: %u\n",
176
fprintf(stderr, "Wrong key usage: %d\n",
231
177
result->wrong_key_usage);
232
178
if(result->file_name != NULL){
233
179
fprintf(stderr, "File name: %s\n", result->file_name);
248
194
}
249
195
}
250
196
197
/* Delete the GPGME FILE pointer cryptotext data buffer */
198
gpgme_data_release(dh_crypto);
199
251
200
/* Seek back to the beginning of the GPGME plaintext data buffer */
252
201
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
253
202
perror("pgpme_data_seek");
254
plaintext_length = -1;
255
goto decrypt_end;
256
203
}
257
204
258
*plaintext = NULL;
205
*new_packet = 0;
259
206
while(true){
260
plaintext_capacity = adjustbuffer(plaintext,
261
(size_t)plaintext_length,
262
plaintext_capacity);
263
if (plaintext_capacity == 0){
264
perror("adjustbuffer");
265
plaintext_length = -1;
266
goto decrypt_end;
207
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
208
*new_packet = realloc(*new_packet,
209
(unsigned int)new_packet_capacity
210
+ BUFFER_SIZE);
211
if (*new_packet == NULL){
212
perror("realloc");
213
return -1;
214
}
215
new_packet_capacity += BUFFER_SIZE;
267
216
}
268
217
269
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
218
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
270
219
BUFFER_SIZE);
271
220
/* Print the data, if any */
272
221
if (ret == 0){
273
/* EOF */
274
222
break;
275
223
}
276
224
if(ret < 0){
277
225
perror("gpgme_data_read");
278
plaintext_length = -1;
279
goto decrypt_end;
226
return -1;
280
227
}
281
plaintext_length += ret;
228
new_packet_length += ret;
282
229
}
283
230
284
if(debug){
285
fprintf(stderr, "Decrypted password is: ");
286
for(ssize_t i = 0; i < plaintext_length; i++){
287
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
288
}
289
fprintf(stderr, "\n");
290
}
291
292
decrypt_end:
293
294
/* Delete the GPGME cryptotext data buffer */
295
gpgme_data_release(dh_crypto);
231
/* FIXME: check characters before printing to screen so to not print
232
terminal control characters */
233
/* if(debug){ */
234
/* fprintf(stderr, "decrypted password is: "); */
235
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
236
/* fprintf(stderr, "\n"); */
237
/* } */
296
238
297
239
/* Delete the GPGME plaintext data buffer */
298
240
gpgme_data_release(dh_plain);
299
return plaintext_length;
241
return new_packet_length;
300
242
}
301
243
302
244
static const char * safer_gnutls_strerror (int value) {
306
248
return ret;
307
249
}
308
250
309
/* GnuTLS log function callback */
310
251
static void debuggnutls(__attribute__((unused)) int level,
311
252
const char* string){
312
fprintf(stderr, "GnuTLS: %s", string);
253
fprintf(stderr, "%s", string);
313
254
}
314
255
315
static int init_gnutls_global(mandos_context *mc,
316
const char *pubkeyfile,
317
const char *seckeyfile){
256
static int initgnutls(encrypted_session *es){
257
const char *err;
318
258
int ret;
319
259
320
260
if(debug){
321
261
fprintf(stderr, "Initializing GnuTLS\n");
322
262
}
323
324
ret = gnutls_global_init();
325
if (ret != GNUTLS_E_SUCCESS) {
326
fprintf (stderr, "GnuTLS global_init: %s\n",
327
safer_gnutls_strerror(ret));
263
264
if ((ret = gnutls_global_init ())
265
!= GNUTLS_E_SUCCESS) {
266
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
328
267
return -1;
329
268
}
330
269
331
270
if (debug){
332
/* "Use a log level over 10 to enable all debugging options."
333
* - GnuTLS manual
334
*/
335
271
gnutls_global_set_log_level(11);
336
272
gnutls_global_set_log_function(debuggnutls);
337
273
}
338
274
339
/* OpenPGP credentials */
340
gnutls_certificate_allocate_credentials(&mc->cred);
341
if (ret != GNUTLS_E_SUCCESS){
342
fprintf (stderr, "GnuTLS memory error: %s\n",
275
/* openpgp credentials */
276
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
277
!= GNUTLS_E_SUCCESS) {
278
fprintf (stderr, "memory error: %s\n",
343
279
safer_gnutls_strerror(ret));
344
gnutls_global_deinit ();
345
280
return -1;
346
281
}
347
282
352
287
}
353
288
354
289
ret = gnutls_certificate_set_openpgp_key_file
355
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
290
(es->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
356
291
if (ret != GNUTLS_E_SUCCESS) {
357
fprintf(stderr,
358
"Error[%d] while reading the OpenPGP key pair ('%s',"
359
" '%s')\n", ret, pubkeyfile, seckeyfile);
360
fprintf(stdout, "The GnuTLS error is: %s\n",
292
fprintf
293
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
294
" '%s')\n",
295
ret, pubkeyfile, seckeyfile);
296
fprintf(stdout, "The Error is: %s\n",
361
297
safer_gnutls_strerror(ret));
362
goto globalfail;
363
}
364
365
/* GnuTLS server initialization */
366
ret = gnutls_dh_params_init(&mc->dh_params);
367
if (ret != GNUTLS_E_SUCCESS) {
368
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
369
" %s\n", safer_gnutls_strerror(ret));
370
goto globalfail;
371
}
372
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
373
if (ret != GNUTLS_E_SUCCESS) {
374
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
375
safer_gnutls_strerror(ret));
376
goto globalfail;
377
}
378
379
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
380
381
return 0;
382
383
globalfail:
384
385
gnutls_certificate_free_credentials(mc->cred);
386
gnutls_global_deinit();
387
return -1;
388
389
}
390
391
static int init_gnutls_session(mandos_context *mc,
392
gnutls_session_t *session){
393
int ret;
394
/* GnuTLS session creation */
395
ret = gnutls_init(session, GNUTLS_SERVER);
396
if (ret != GNUTLS_E_SUCCESS){
298
return -1;
299
}
300
301
//GnuTLS server initialization
302
if ((ret = gnutls_dh_params_init (&es->dh_params))
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "Error in dh parameter initialization: %s\n",
305
safer_gnutls_strerror(ret));
306
return -1;
307
}
308
309
if ((ret = gnutls_dh_params_generate2 (es->dh_params, dh_bits))
310
!= GNUTLS_E_SUCCESS) {
311
fprintf (stderr, "Error in prime generation: %s\n",
312
safer_gnutls_strerror(ret));
313
return -1;
314
}
315
316
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
317
318
// GnuTLS session creation
319
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
320
!= GNUTLS_E_SUCCESS){
397
321
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
398
322
safer_gnutls_strerror(ret));
399
323
}
400
324
401
{
402
const char *err;
403
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
404
if (ret != GNUTLS_E_SUCCESS) {
405
fprintf(stderr, "Syntax error at: %s\n", err);
406
fprintf(stderr, "GnuTLS error: %s\n",
407
safer_gnutls_strerror(ret));
408
gnutls_deinit (*session);
409
return -1;
410
}
325
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
326
!= GNUTLS_E_SUCCESS) {
327
fprintf(stderr, "Syntax error at: %s\n", err);
328
fprintf(stderr, "GnuTLS error: %s\n",
329
safer_gnutls_strerror(ret));
330
return -1;
411
331
}
412
332
413
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
414
mc->cred);
415
if (ret != GNUTLS_E_SUCCESS) {
416
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
333
if ((ret = gnutls_credentials_set
334
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
335
!= GNUTLS_E_SUCCESS) {
336
fprintf(stderr, "Error setting a credentials set: %s\n",
417
337
safer_gnutls_strerror(ret));
418
gnutls_deinit (*session);
419
338
return -1;
420
339
}
421
340
422
341
/* ignore client certificate if any. */
423
gnutls_certificate_server_set_request (*session,
342
gnutls_certificate_server_set_request (es->session,
424
343
GNUTLS_CERT_IGNORE);
425
344
426
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
345
gnutls_dh_set_prime_bits (es->session, dh_bits);
427
346
428
347
return 0;
429
348
}
430
349
431
/* Avahi log function callback */
432
350
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
433
351
__attribute__((unused)) const char *txt){}
434
352
435
/* Called when a Mandos server is found */
436
353
static int start_mandos_communication(const char *ip, uint16_t port,
437
AvahiIfIndex if_index,
438
mandos_context *mc){
354
AvahiIfIndex if_index){
439
355
int ret, tcp_sd;
440
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
356
struct sockaddr_in6 to;
357
encrypted_session es;
441
358
char *buffer = NULL;
442
359
char *decrypted_buffer;
443
360
size_t buffer_length = 0;
444
361
size_t buffer_capacity = 0;
445
362
ssize_t decrypted_buffer_size;
446
size_t written;
363
size_t written = 0;
447
364
int retval = 0;
448
365
char interface[IF_NAMESIZE];
449
gnutls_session_t session;
450
451
ret = init_gnutls_session (mc, &session);
452
if (ret != 0){
453
return -1;
454
}
455
366
456
367
if(debug){
457
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
458
"\n", ip, port);
368
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
369
ip, port);
459
370
}
460
371
461
372
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
463
374
perror("socket");
464
375
return -1;
465
376
}
466
467
if(debug){
468
if(if_indextoname((unsigned int)if_index, interface) == NULL){
377
378
if(if_indextoname((unsigned int)if_index, interface) == NULL){
379
if(debug){
469
380
perror("if_indextoname");
470
return -1;
471
381
}
382
return -1;
383
}
384
385
if(debug){
472
386
fprintf(stderr, "Binding to interface %s\n", interface);
473
387
}
474
388
475
389
memset(&to,0,sizeof(to)); /* Spurious warning */
476
to.in6.sin6_family = AF_INET6;
477
/* It would be nice to have a way to detect if we were passed an
478
IPv4 address here. Now we assume an IPv6 address. */
479
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
390
to.sin6_family = AF_INET6;
391
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
480
392
if (ret < 0 ){
481
393
perror("inet_pton");
482
394
return -1;
483
}
395
}
484
396
if(ret == 0){
485
397
fprintf(stderr, "Bad address: %s\n", ip);
486
398
return -1;
487
399
}
488
to.in6.sin6_port = htons(port); /* Spurious warning */
400
to.sin6_port = htons(port); /* Spurious warning */
489
401
490
to.in6.sin6_scope_id = (uint32_t)if_index;
402
to.sin6_scope_id = (uint32_t)if_index;
491
403
492
404
if(debug){
493
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
494
port);
405
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
495
406
char addrstr[INET6_ADDRSTRLEN] = "";
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
407
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
497
408
sizeof(addrstr)) == NULL){
498
409
perror("inet_ntop");
499
410
} else {
500
411
if(strcmp(addrstr, ip) != 0){
501
fprintf(stderr, "Canonical address form: %s\n", addrstr);
412
fprintf(stderr, "Canonical address form: %s\n",
413
addrstr, ntohs(to.sin6_port));
502
414
}
503
415
}
504
416
}
505
417
506
ret = connect(tcp_sd, &to.in, sizeof(to));
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
507
419
if (ret < 0){
508
420
perror("connect");
509
421
return -1;
510
422
}
511
512
const char *out = mandos_protocol_version;
513
written = 0;
514
while (true){
515
size_t out_size = strlen(out);
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
517
out_size - written));
518
if (ret == -1){
519
perror("write");
520
retval = -1;
521
goto mandos_end;
522
}
523
written += (size_t)ret;
524
if(written < out_size){
525
continue;
526
} else {
527
if (out == mandos_protocol_version){
528
written = 0;
529
out = "\r\n";
530
} else {
531
break;
532
}
533
}
423
424
ret = initgnutls (&es);
425
if (ret != 0){
426
retval = -1;
427
return -1;
534
428
}
535
429
430
gnutls_transport_set_ptr (es.session,
431
(gnutls_transport_ptr_t) tcp_sd);
432
536
433
if(debug){
537
434
fprintf(stderr, "Establishing TLS session with %s\n", ip);
538
435
}
539
436
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
541
542
do{
543
ret = gnutls_handshake (session);
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
437
ret = gnutls_handshake (es.session);
545
438
546
439
if (ret != GNUTLS_E_SUCCESS){
547
440
if(debug){
548
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
441
fprintf(stderr, "\n*** Handshake failed ***\n");
549
442
gnutls_perror (ret);
550
443
}
551
444
retval = -1;
552
goto mandos_end;
445
goto exit;
553
446
}
554
447
555
/* Read OpenPGP packet that contains the wanted password */
448
//Retrieve OpenPGP packet that contains the wanted password
556
449
557
450
if(debug){
558
451
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
560
453
}
561
454
562
455
while(true){
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
564
buffer_capacity);
565
if (buffer_capacity == 0){
566
perror("adjustbuffer");
567
retval = -1;
568
goto mandos_end;
456
if (buffer_length + BUFFER_SIZE > buffer_capacity){
457
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
458
if (buffer == NULL){
459
perror("realloc");
460
goto exit;
461
}
462
buffer_capacity += BUFFER_SIZE;
569
463
}
570
464
571
ret = gnutls_record_recv(session, buffer+buffer_length,
572
BUFFER_SIZE);
465
ret = gnutls_record_recv
466
(es.session, buffer+buffer_length, BUFFER_SIZE);
573
467
if (ret == 0){
574
468
break;
575
469
}
579
473
case GNUTLS_E_AGAIN:
580
474
break;
581
475
case GNUTLS_E_REHANDSHAKE:
582
do{
583
ret = gnutls_handshake (session);
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
476
ret = gnutls_handshake (es.session);
585
477
if (ret < 0){
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
478
fprintf(stderr, "\n*** Handshake failed ***\n");
587
479
gnutls_perror (ret);
588
480
retval = -1;
589
goto mandos_end;
481
goto exit;
590
482
}
591
483
break;
592
484
default:
593
485
fprintf(stderr, "Unknown error while reading data from"
594
" encrypted session with Mandos server\n");
486
" encrypted session with mandos server\n");
595
487
retval = -1;
596
gnutls_bye (session, GNUTLS_SHUT_RDWR);
597
goto mandos_end;
488
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
489
goto exit;
598
490
}
599
491
} else {
600
492
buffer_length += (size_t) ret;
601
493
}
602
494
}
603
495
604
if(debug){
605
fprintf(stderr, "Closing TLS session\n");
606
}
607
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
609
610
496
if (buffer_length > 0){
611
497
decrypted_buffer_size = pgp_packet_decrypt(buffer,
612
498
buffer_length,
613
499
&decrypted_buffer,
614
500
keydir);
615
501
if (decrypted_buffer_size >= 0){
616
written = 0;
617
502
while(written < (size_t) decrypted_buffer_size){
618
503
ret = (int)fwrite (decrypted_buffer + written, 1,
619
504
(size_t)decrypted_buffer_size - written,
633
518
retval = -1;
634
519
}
635
520
}
636
637
/* Shutdown procedure */
638
639
mandos_end:
521
522
//shutdown procedure
523
524
if(debug){
525
fprintf(stderr, "Closing TLS session\n");
526
}
527
640
528
free(buffer);
529
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
530
exit:
641
531
close(tcp_sd);
642
gnutls_deinit (session);
532
gnutls_deinit (es.session);
533
gnutls_certificate_free_credentials (es.cred);
534
gnutls_global_deinit ();
643
535
return retval;
644
536
}
645
537
646
static void resolve_callback(AvahiSServiceResolver *r,
647
AvahiIfIndex interface,
648
AVAHI_GCC_UNUSED AvahiProtocol protocol,
649
AvahiResolverEvent event,
650
const char *name,
651
const char *type,
652
const char *domain,
653
const char *host_name,
654
const AvahiAddress *address,
655
uint16_t port,
656
AVAHI_GCC_UNUSED AvahiStringList *txt,
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
658
flags,
659
void* userdata) {
660
mandos_context *mc = userdata;
538
static AvahiSimplePoll *simple_poll = NULL;
539
static AvahiServer *server = NULL;
540
541
static void resolve_callback(
542
AvahiSServiceResolver *r,
543
AvahiIfIndex interface,
544
AVAHI_GCC_UNUSED AvahiProtocol protocol,
545
AvahiResolverEvent event,
546
const char *name,
547
const char *type,
548
const char *domain,
549
const char *host_name,
550
const AvahiAddress *address,
551
uint16_t port,
552
AVAHI_GCC_UNUSED AvahiStringList *txt,
553
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
554
AVAHI_GCC_UNUSED void* userdata) {
555
661
556
assert(r); /* Spurious warning */
662
557
663
558
/* Called whenever a service has been resolved successfully or
666
561
switch (event) {
667
562
default:
668
563
case AVAHI_RESOLVER_FAILURE:
669
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
670
" of type '%s' in domain '%s': %s\n", name, type, domain,
671
avahi_strerror(avahi_server_errno(mc->server)));
564
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
565
" type '%s' in domain '%s': %s\n", name, type, domain,
566
avahi_strerror(avahi_server_errno(server)));
672
567
break;
673
568
674
569
case AVAHI_RESOLVER_FOUND:
676
571
char ip[AVAHI_ADDRESS_STR_MAX];
677
572
avahi_address_snprint(ip, sizeof(ip), address);
678
573
if(debug){
679
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
680
PRIu16 ") on port %d\n", name, host_name, ip,
681
interface, port);
574
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
575
" port %d\n", name, host_name, ip, port);
682
576
}
683
int ret = start_mandos_communication(ip, port, interface, mc);
577
int ret = start_mandos_communication(ip, port, interface);
684
578
if (ret == 0){
685
avahi_simple_poll_quit(mc->simple_poll);
579
exit(EXIT_SUCCESS);
686
580
}
687
581
}
688
582
}
689
583
avahi_s_service_resolver_free(r);
690
584
}
691
585
692
static void browse_callback( AvahiSServiceBrowser *b,
693
AvahiIfIndex interface,
694
AvahiProtocol protocol,
695
AvahiBrowserEvent event,
696
const char *name,
697
const char *type,
698
const char *domain,
699
AVAHI_GCC_UNUSED AvahiLookupResultFlags
700
flags,
701
void* userdata) {
702
mandos_context *mc = userdata;
703
assert(b); /* Spurious warning */
704
705
/* Called whenever a new services becomes available on the LAN or
706
is removed from the LAN */
707
708
switch (event) {
709
default:
710
case AVAHI_BROWSER_FAILURE:
711
712
fprintf(stderr, "(Avahi browser) %s\n",
713
avahi_strerror(avahi_server_errno(mc->server)));
714
avahi_simple_poll_quit(mc->simple_poll);
715
return;
716
717
case AVAHI_BROWSER_NEW:
718
/* We ignore the returned Avahi resolver object. In the callback
719
function we free it. If the Avahi server is terminated before
720
the callback function is called the Avahi server will free the
721
resolver for us. */
722
723
if (!(avahi_s_service_resolver_new(mc->server, interface,
724
protocol, name, type, domain,
725
AVAHI_PROTO_INET6, 0,
726
resolve_callback, mc)))
727
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
728
name, avahi_strerror(avahi_server_errno(mc->server)));
729
break;
730
731
case AVAHI_BROWSER_REMOVE:
732
break;
733
734
case AVAHI_BROWSER_ALL_FOR_NOW:
735
case AVAHI_BROWSER_CACHE_EXHAUSTED:
736
if(debug){
737
fprintf(stderr, "No Mandos server found, still searching...\n");
586
static void browse_callback(
587
AvahiSServiceBrowser *b,
588
AvahiIfIndex interface,
589
AvahiProtocol protocol,
590
AvahiBrowserEvent event,
591
const char *name,
592
const char *type,
593
const char *domain,
594
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
595
void* userdata) {
596
597
AvahiServer *s = userdata;
598
assert(b); /* Spurious warning */
599
600
/* Called whenever a new services becomes available on the LAN or
601
is removed from the LAN */
602
603
switch (event) {
604
default:
605
case AVAHI_BROWSER_FAILURE:
606
607
fprintf(stderr, "(Browser) %s\n",
608
avahi_strerror(avahi_server_errno(server)));
609
avahi_simple_poll_quit(simple_poll);
610
return;
611
612
case AVAHI_BROWSER_NEW:
613
/* We ignore the returned resolver object. In the callback
614
function we free it. If the server is terminated before
615
the callback function is called the server will free
616
the resolver for us. */
617
618
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
619
type, domain,
620
AVAHI_PROTO_INET6, 0,
621
resolve_callback, s)))
622
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
623
avahi_strerror(avahi_server_errno(s)));
624
break;
625
626
case AVAHI_BROWSER_REMOVE:
627
break;
628
629
case AVAHI_BROWSER_ALL_FOR_NOW:
630
case AVAHI_BROWSER_CACHE_EXHAUSTED:
631
break;
738
632
}
739
break;
740
}
741
633
}
742
634
743
635
/* Combines file name and path and returns the malloced new
750
642
return NULL;
751
643
}
752
644
if(f_len > 0){
753
memcpy(tmp, first, f_len); /* Spurious warning */
645
memcpy(tmp, first, f_len);
754
646
}
755
647
tmp[f_len] = '/';
756
648
if(s_len > 0){
757
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
649
memcpy(tmp + f_len + 1, second, s_len);
758
650
}
759
651
tmp[f_len + 1 + s_len] = '\0';
760
652
return tmp;
761
653
}
762
654
763
655
764
int main(int argc, char *argv[]){
656
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
657
AvahiServerConfig config;
765
658
AvahiSServiceBrowser *sb = NULL;
766
659
int error;
767
660
int ret;
768
int exitcode = EXIT_SUCCESS;
769
const char *interface = "eth0";
770
struct ifreq network;
771
int sd;
772
uid_t uid;
773
gid_t gid;
661
int debug_int = 0;
662
int returncode = EXIT_SUCCESS;
663
const char *interface = NULL;
664
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
774
665
char *connect_to = NULL;
775
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
776
const char *pubkeyfile = "pubkey.txt";
777
const char *seckeyfile = "seckey.txt";
778
mandos_context mc = { .simple_poll = NULL, .server = NULL,
779
.dh_bits = 1024, .priority = "SECURE256"};
780
bool gnutls_initalized = false;
781
666
782
{
783
struct argp_option options[] = {
784
{ .name = "debug", .key = 128,
785
.doc = "Debug mode", .group = 3 },
786
{ .name = "connect", .key = 'c',
787
.arg = "IP",
788
.doc = "Connect directly to a sepcified mandos server",
789
.group = 1 },
790
{ .name = "interface", .key = 'i',
791
.arg = "INTERFACE",
792
.doc = "Interface that Avahi will conntect through",
793
.group = 1 },
794
{ .name = "keydir", .key = 'd',
795
.arg = "KEYDIR",
796
.doc = "Directory where the openpgp keyring is",
797
.group = 1 },
798
{ .name = "seckey", .key = 's',
799
.arg = "SECKEY",
800
.doc = "Secret openpgp key for gnutls authentication",
801
.group = 1 },
802
{ .name = "pubkey", .key = 'p',
803
.arg = "PUBKEY",
804
.doc = "Public openpgp key for gnutls authentication",
805
.group = 2 },
806
{ .name = "dh-bits", .key = 129,
807
.arg = "BITS",
808
.doc = "dh-bits to use in gnutls communication",
809
.group = 2 },
810
{ .name = "priority", .key = 130,
811
.arg = "PRIORITY",
812
.doc = "GNUTLS priority", .group = 1 },
813
{ .name = NULL }
814
};
815
816
817
error_t parse_opt (int key, char *arg,
818
struct argp_state *state) {
819
/* Get the INPUT argument from `argp_parse', which we know is
820
a pointer to our plugin list pointer. */
821
switch (key) {
822
case 128:
823
debug = true;
824
break;
825
case 'c':
826
connect_to = arg;
827
break;
828
case 'i':
829
interface = arg;
830
break;
831
case 'd':
832
keydir = arg;
833
break;
834
case 's':
835
seckeyfile = arg;
836
break;
837
case 'p':
838
pubkeyfile = arg;
839
break;
840
case 129:
841
errno = 0;
842
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
843
if (errno){
844
perror("strtol");
845
exit(EXIT_FAILURE);
846
}
847
break;
848
case 130:
849
mc.priority = arg;
850
break;
851
case ARGP_KEY_ARG:
852
argp_usage (state);
853
case ARGP_KEY_END:
854
break;
855
default:
856
return ARGP_ERR_UNKNOWN;
857
}
858
return 0;
667
debug_int = debug ? 1 : 0;
668
while (true){
669
static struct option long_options[] = {
670
{"debug", no_argument, &debug_int, 1},
671
{"connect", required_argument, NULL, 'C'},
672
{"interface", required_argument, NULL, 'i'},
673
{"keydir", required_argument, NULL, 'd'},
674
{"seckey", required_argument, NULL, 'c'},
675
{"pubkey", required_argument, NULL, 'k'},
676
{"dh-bits", required_argument, NULL, 'D'},
677
{0, 0, 0, 0} };
678
679
int option_index = 0;
680
ret = getopt_long (argc, argv, "i:", long_options,
681
&option_index);
682
683
if (ret == -1){
684
break;
859
685
}
860
861
struct argp argp = { .options = options, .parser = parse_opt,
862
.args_doc = "",
863
.doc = "Mandos client -- Get and decrypt"
864
" passwords from mandos server" };
865
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unknown error while parsing arguments\n");
868
exitcode = EXIT_FAILURE;
869
goto end;
686
687
switch(ret){
688
case 0:
689
break;
690
case 'i':
691
interface = optarg;
692
break;
693
case 'C':
694
connect_to = optarg;
695
break;
696
case 'd':
697
keydir = optarg;
698
break;
699
case 'c':
700
pubkeyfile = optarg;
701
break;
702
case 'k':
703
seckeyfile = optarg;
704
break;
705
case 'D':
706
dh_bits = atoi(optarg);
707
break;
708
case '?':
709
break
710
default:
711
exit(EXIT_FAILURE);
870
712
}
871
713
}
872
714
debug = debug_int ? true : false;
715
873
716
pubkeyfile = combinepath(keydir, pubkeyfile);
874
717
if (pubkeyfile == NULL){
875
718
perror("combinepath");
876
exitcode = EXIT_FAILURE;
877
goto end;
878
}
879
880
seckeyfile = combinepath(keydir, seckeyfile);
881
if (seckeyfile == NULL){
882
perror("combinepath");
883
exitcode = EXIT_FAILURE;
884
goto end;
885
}
886
887
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
888
if (ret == -1){
889
fprintf(stderr, "init_gnutls_global failed\n");
890
exitcode = EXIT_FAILURE;
891
goto end;
892
} else {
893
gnutls_initalized = true;
894
}
895
896
/* If the interface is down, bring it up */
897
{
898
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
899
if(sd < 0) {
900
perror("socket");
901
exitcode = EXIT_FAILURE;
902
goto end;
903
}
904
strcpy(network.ifr_name, interface); /* Spurious warning */
905
ret = ioctl(sd, SIOCGIFFLAGS, &network);
906
if(ret == -1){
907
perror("ioctl SIOCGIFFLAGS");
908
exitcode = EXIT_FAILURE;
909
goto end;
910
}
911
if((network.ifr_flags & IFF_UP) == 0){
912
network.ifr_flags |= IFF_UP;
913
ret = ioctl(sd, SIOCSIFFLAGS, &network);
914
if(ret == -1){
915
perror("ioctl SIOCSIFFLAGS");
916
exitcode = EXIT_FAILURE;
917
goto end;
918
}
919
}
920
close(sd);
921
}
922
923
uid = getuid();
924
gid = getgid();
925
926
ret = setuid(uid);
927
if (ret == -1){
928
perror("setuid");
929
}
930
931
setgid(gid);
932
if (ret == -1){
933
perror("setgid");
934
}
935
936
if_index = (AvahiIfIndex) if_nametoindex(interface);
937
if(if_index == 0){
938
fprintf(stderr, "No such interface: \"%s\"\n", interface);
939
exit(EXIT_FAILURE);
719
goto exit;
720
}
721
722
if(interface != NULL){
723
if_index = (AvahiIfIndex) if_nametoindex(interface);
724
if(if_index == 0){
725
fprintf(stderr, "No such interface: \"%s\"\n", interface);
726
exit(EXIT_FAILURE);
727
}
940
728
}
941
729
942
730
if(connect_to != NULL){
945
733
char *address = strrchr(connect_to, ':');
946
734
if(address == NULL){
947
735
fprintf(stderr, "No colon in address\n");
948
exitcode = EXIT_FAILURE;
949
goto end;
736
exit(EXIT_FAILURE);
950
737
}
951
738
errno = 0;
952
739
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
953
740
if(errno){
954
741
perror("Bad port number");
955
exitcode = EXIT_FAILURE;
956
goto end;
742
exit(EXIT_FAILURE);
957
743
}
958
744
*address = '\0';
959
745
address = connect_to;
960
ret = start_mandos_communication(address, port, if_index, &mc);
746
ret = start_mandos_communication(address, port, if_index);
961
747
if(ret < 0){
962
exitcode = EXIT_FAILURE;
748
exit(EXIT_FAILURE);
963
749
} else {
964
exitcode = EXIT_SUCCESS;
750
exit(EXIT_SUCCESS);
965
751
}
966
goto end;
752
}
753
754
seckeyfile = combinepath(keydir, seckeyfile);
755
if (seckeyfile == NULL){
756
perror("combinepath");
757
goto exit;
967
758
}
968
759
969
760
if (not debug){
970
761
avahi_set_log_function(empty_log);
971
762
}
972
763
973
/* Initialize the pseudo-RNG for Avahi */
764
/* Initialize the psuedo-RNG */
974
765
srand((unsigned int) time(NULL));
975
976
/* Allocate main Avahi loop object */
977
mc.simple_poll = avahi_simple_poll_new();
978
if (mc.simple_poll == NULL) {
979
fprintf(stderr, "Avahi: Failed to create simple poll"
980
" object.\n");
981
exitcode = EXIT_FAILURE;
982
goto end;
983
}
984
985
{
986
AvahiServerConfig config;
987
/* Do not publish any local Zeroconf records */
988
avahi_server_config_init(&config);
989
config.publish_hinfo = 0;
990
config.publish_addresses = 0;
991
config.publish_workstation = 0;
992
config.publish_domain = 0;
993
994
/* Allocate a new server */
995
mc.server = avahi_server_new(avahi_simple_poll_get
996
(mc.simple_poll), &config, NULL,
997
NULL, &error);
998
999
/* Free the Avahi configuration data */
1000
avahi_server_config_free(&config);
1001
}
1002
1003
/* Check if creating the Avahi server object succeeded */
1004
if (mc.server == NULL) {
1005
fprintf(stderr, "Failed to create Avahi server: %s\n",
766
767
/* Allocate main loop object */
768
if (!(simple_poll = avahi_simple_poll_new())) {
769
fprintf(stderr, "Failed to create simple poll object.\n");
770
771
goto exit;
772
}
773
774
/* Do not publish any local records */
775
avahi_server_config_init(&config);
776
config.publish_hinfo = 0;
777
config.publish_addresses = 0;
778
config.publish_workstation = 0;
779
config.publish_domain = 0;
780
781
/* Allocate a new server */
782
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
783
&config, NULL, NULL, &error);
784
785
/* Free the configuration data */
786
avahi_server_config_free(&config);
787
788
/* Check if creating the server object succeeded */
789
if (!server) {
790
fprintf(stderr, "Failed to create server: %s\n",
1006
791
avahi_strerror(error));
1007
exitcode = EXIT_FAILURE;
1008
goto end;
792
returncode = EXIT_FAILURE;
793
goto exit;
1009
794
}
1010
795
1011
/* Create the Avahi service browser */
1012
sb = avahi_s_service_browser_new(mc.server, if_index,
796
/* Create the service browser */
797
sb = avahi_s_service_browser_new(server, if_index,
1013
798
AVAHI_PROTO_INET6,
1014
799
"_mandos._tcp", NULL, 0,
1015
browse_callback, &mc);
1016
if (sb == NULL) {
800
browse_callback, server);
801
if (!sb) {
1017
802
fprintf(stderr, "Failed to create service browser: %s\n",
1018
avahi_strerror(avahi_server_errno(mc.server)));
1019
exitcode = EXIT_FAILURE;
1020
goto end;
803
avahi_strerror(avahi_server_errno(server)));
804
returncode = EXIT_FAILURE;
805
goto exit;
1021
806
}
1022
807
1023
808
/* Run the main loop */
1024
809
1025
810
if (debug){
1026
fprintf(stderr, "Starting Avahi loop search\n");
811
fprintf(stderr, "Starting avahi loop search\n");
1027
812
}
1028
813
1029
avahi_simple_poll_loop(mc.simple_poll);
814
avahi_simple_poll_loop(simple_poll);
1030
815
1031
end:
816
exit:
1032
817
1033
818
if (debug){
1034
819
fprintf(stderr, "%s exiting\n", argv[0]);
1035
820
}
1036
821
1037
822
/* Cleanup things */
1038
if (sb != NULL)
823
if (sb)
1039
824
avahi_s_service_browser_free(sb);
1040
825
1041
if (mc.server != NULL)
1042
avahi_server_free(mc.server);
826
if (server)
827
avahi_server_free(server);
1043
828
1044
if (mc.simple_poll != NULL)
1045
avahi_simple_poll_free(mc.simple_poll);
829
if (simple_poll)
830
avahi_simple_poll_free(simple_poll);
1046
831
free(pubkeyfile);
1047
832
free(seckeyfile);
1048
1049
if (gnutls_initalized){
1050
gnutls_certificate_free_credentials(mc.cred);
1051
gnutls_global_deinit ();
1052
}
1053
833
1054
return exitcode;
834
return returncode;
1055
835
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0