1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
|
/*
Unix SMB/CIFS implementation.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-1998
Modified by Jeremy Allison 1995.
Copyright (C) Jeremy Allison 1995-2000.
Copyright (C) Luke Kennethc Casson Leighton 1996-2000.
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "byteorder.h"
void SMBencrypt_hash(const uchar lm_hash[16], const uchar *c8, uchar p24[24])
{
uchar p21[21];
memset(p21,'\0',21);
memcpy(p21, lm_hash, 16);
SMBOWFencrypt(p21, c8, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBencrypt_hash: lm#, challenge, response\n"));
dump_data(100, p21, 16);
dump_data(100, c8, 8);
dump_data(100, p24, 24);
#endif
}
/*
This implements the X/Open SMB password encryption
It takes a password ('unix' string), a 8 byte "crypt key"
and puts 24 bytes of encrypted password into p24
Returns False if password must have been truncated to create LM hash
*/
bool SMBencrypt(const char *passwd, const uchar *c8, uchar p24[24])
{
bool ret;
uchar lm_hash[16];
ret = E_deshash(passwd, lm_hash);
SMBencrypt_hash(lm_hash, c8, p24);
return ret;
}
/**
* Creates the MD4 Hash of the users password in NT UNICODE.
* @param passwd password in 'unix' charset.
* @param p16 return password hashed with md4, caller allocated 16 byte buffer
*/
void E_md4hash(const char *passwd, uchar p16[16])
{
int len;
smb_ucs2_t wpwd[129];
/* Password must be converted to NT unicode - null terminated. */
push_ucs2(NULL, wpwd, (const char *)passwd, 256, STR_UNICODE|STR_NOALIGN|STR_TERMINATE);
/* Calculate length in bytes */
len = strlen_w(wpwd) * sizeof(int16);
mdfour(p16, (unsigned char *)wpwd, len);
ZERO_STRUCT(wpwd);
}
/**
* Creates the MD5 Hash of a combination of 16 byte salt and 16 byte NT hash.
* @param 16 byte salt.
* @param 16 byte NT hash.
* @param 16 byte return hashed with md5, caller allocated 16 byte buffer
*/
void E_md5hash(const uchar salt[16], const uchar nthash[16], uchar hash_out[16])
{
struct MD5Context tctx;
uchar array[32];
memset(hash_out, '\0', 16);
memcpy(array, salt, 16);
memcpy(&array[16], nthash, 16);
MD5Init(&tctx);
MD5Update(&tctx, array, 32);
MD5Final(hash_out, &tctx);
}
/**
* Creates the DES forward-only Hash of the users password in DOS ASCII charset
* @param passwd password in 'unix' charset.
* @param p16 return password hashed with DES, caller allocated 16 byte buffer
* @return False if password was > 14 characters, and therefore may be incorrect, otherwise True
* @note p16 is filled in regardless
*/
bool E_deshash(const char *passwd, uchar p16[16])
{
bool ret = True;
fstring dospwd;
ZERO_STRUCT(dospwd);
/* Password must be converted to DOS charset - null terminated, uppercase. */
push_ascii(dospwd, passwd, sizeof(dospwd), STR_UPPER|STR_TERMINATE);
/* Only the fisrt 14 chars are considered, password need not be null terminated. */
E_P16((const unsigned char *)dospwd, p16);
if (strlen(dospwd) > 14) {
ret = False;
}
ZERO_STRUCT(dospwd);
return ret;
}
/**
* Creates the MD4 and DES (LM) Hash of the users password.
* MD4 is of the NT Unicode, DES is of the DOS UPPERCASE password.
* @param passwd password in 'unix' charset.
* @param nt_p16 return password hashed with md4, caller allocated 16 byte buffer
* @param p16 return password hashed with des, caller allocated 16 byte buffer
*/
/* Does both the NT and LM owfs of a user's password */
void nt_lm_owf_gen(const char *pwd, uchar nt_p16[16], uchar p16[16])
{
/* Calculate the MD4 hash (NT compatible) of the password */
memset(nt_p16, '\0', 16);
E_md4hash(pwd, nt_p16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("nt_lm_owf_gen: pwd, nt#\n"));
dump_data(120, (uint8 *)pwd, strlen(pwd));
dump_data(100, nt_p16, 16);
#endif
E_deshash(pwd, (uchar *)p16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("nt_lm_owf_gen: pwd, lm#\n"));
dump_data(120, (uint8 *)pwd, strlen(pwd));
dump_data(100, p16, 16);
#endif
}
/* Does both the NTLMv2 owfs of a user's password */
bool ntv2_owf_gen(const uchar owf[16],
const char *user_in, const char *domain_in,
bool upper_case_domain, /* Transform the domain into UPPER case */
uchar kr_buf[16])
{
smb_ucs2_t *user;
smb_ucs2_t *domain;
size_t user_byte_len;
size_t domain_byte_len;
HMACMD5Context ctx;
user_byte_len = push_ucs2_allocate(&user, user_in);
if (user_byte_len == (size_t)-1) {
DEBUG(0, ("push_uss2_allocate() for user returned -1 (probably malloc() failure)\n"));
return False;
}
domain_byte_len = push_ucs2_allocate(&domain, domain_in);
if (domain_byte_len == (size_t)-1) {
DEBUG(0, ("push_uss2_allocate() for domain returned -1 (probably malloc() failure)\n"));
return False;
}
strupper_w(user);
if (upper_case_domain)
strupper_w(domain);
SMB_ASSERT(user_byte_len >= 2);
SMB_ASSERT(domain_byte_len >= 2);
/* We don't want null termination */
user_byte_len = user_byte_len - 2;
domain_byte_len = domain_byte_len - 2;
hmac_md5_init_limK_to_64(owf, 16, &ctx);
hmac_md5_update((const unsigned char *)user, user_byte_len, &ctx);
hmac_md5_update((const unsigned char *)domain, domain_byte_len, &ctx);
hmac_md5_final(kr_buf, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("ntv2_owf_gen: user, domain, owfkey, kr\n"));
dump_data(100, (uint8 *)user, user_byte_len);
dump_data(100, (uint8 *)domain, domain_byte_len);
dump_data(100, (uint8 *)owf, 16);
dump_data(100, (uint8 *)kr_buf, 16);
#endif
SAFE_FREE(user);
SAFE_FREE(domain);
return True;
}
/* Does the des encryption from the NT or LM MD4 hash. */
void SMBOWFencrypt(const uchar passwd[16], const uchar *c8, uchar p24[24])
{
uchar p21[21];
ZERO_STRUCT(p21);
memcpy(p21, passwd, 16);
E_P24(p21, c8, p24);
}
/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
void NTLMSSPOWFencrypt(const uchar passwd[8], const uchar *ntlmchalresp, uchar p24[24])
{
uchar p21[21];
memset(p21,'\0',21);
memcpy(p21, passwd, 8);
memset(p21 + 8, 0xbd, 8);
E_P24(p21, ntlmchalresp, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("NTLMSSPOWFencrypt: p21, c8, p24\n"));
dump_data(100, p21, 21);
dump_data(100, ntlmchalresp, 8);
dump_data(100, p24, 24);
#endif
}
/* Does the des encryption. */
void SMBNTencrypt_hash(const uchar nt_hash[16], uchar *c8, uchar *p24)
{
uchar p21[21];
memset(p21,'\0',21);
memcpy(p21, nt_hash, 16);
SMBOWFencrypt(p21, c8, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBNTencrypt: nt#, challenge, response\n"));
dump_data(100, p21, 16);
dump_data(100, c8, 8);
dump_data(100, p24, 24);
#endif
}
/* Does the NT MD4 hash then des encryption. Plaintext version of the above. */
void SMBNTencrypt(const char *passwd, uchar *c8, uchar *p24)
{
uchar nt_hash[16];
E_md4hash(passwd, nt_hash);
SMBNTencrypt_hash(nt_hash, c8, p24);
}
/* Does the md5 encryption from the Key Response for NTLMv2. */
void SMBOWFencrypt_ntv2(const uchar kr[16],
const DATA_BLOB *srv_chal,
const DATA_BLOB *cli_chal,
uchar resp_buf[16])
{
HMACMD5Context ctx;
hmac_md5_init_limK_to_64(kr, 16, &ctx);
hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
hmac_md5_final(resp_buf, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("SMBOWFencrypt_ntv2: srv_chal, cli_chal, resp_buf\n"));
dump_data(100, srv_chal->data, srv_chal->length);
dump_data(100, cli_chal->data, cli_chal->length);
dump_data(100, resp_buf, 16);
#endif
}
void SMBsesskeygen_ntv2(const uchar kr[16],
const uchar * nt_resp, uint8 sess_key[16])
{
/* a very nice, 128 bit, variable session key */
HMACMD5Context ctx;
hmac_md5_init_limK_to_64(kr, 16, &ctx);
hmac_md5_update(nt_resp, 16, &ctx);
hmac_md5_final((unsigned char *)sess_key, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("SMBsesskeygen_ntv2:\n"));
dump_data(100, sess_key, 16);
#endif
}
void SMBsesskeygen_ntv1(const uchar kr[16],
const uchar * nt_resp, uint8 sess_key[16])
{
/* yes, this session key does not change - yes, this
is a problem - but it is 128 bits */
mdfour((unsigned char *)sess_key, kr, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("SMBsesskeygen_ntv1:\n"));
dump_data(100, sess_key, 16);
#endif
}
void SMBsesskeygen_lm_sess_key(const uchar lm_hash[16],
const uchar lm_resp[24], /* only uses 8 */
uint8 sess_key[16])
{
uchar p24[24];
uchar partial_lm_hash[16];
memcpy(partial_lm_hash, lm_hash, 8);
memset(partial_lm_hash + 8, 0xbd, 8);
SMBOWFencrypt(partial_lm_hash, lm_resp, p24);
memcpy(sess_key, p24, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("SMBsesskeygen_lmv1_jerry:\n"));
dump_data(100, sess_key, 16);
#endif
}
DATA_BLOB NTLMv2_generate_names_blob(const char *hostname,
const char *domain)
{
DATA_BLOB names_blob = data_blob_null;
msrpc_gen(&names_blob, "aaa",
NTLMSSP_NAME_TYPE_DOMAIN, domain,
NTLMSSP_NAME_TYPE_SERVER, hostname,
0, "");
return names_blob;
}
static DATA_BLOB NTLMv2_generate_client_data(const DATA_BLOB *names_blob)
{
uchar client_chal[8];
DATA_BLOB response = data_blob_null;
char long_date[8];
generate_random_buffer(client_chal, sizeof(client_chal));
put_long_date(long_date, time(NULL));
/* See http://www.ubiqx.org/cifs/SMB.html#SMB.8.5 */
msrpc_gen(&response, "ddbbdb",
0x00000101, /* Header */
0, /* 'Reserved' */
long_date, 8, /* Timestamp */
client_chal, 8, /* client challenge */
0, /* Unknown */
names_blob->data, names_blob->length); /* End of name list */
return response;
}
static DATA_BLOB NTLMv2_generate_response(const uchar ntlm_v2_hash[16],
const DATA_BLOB *server_chal,
const DATA_BLOB *names_blob)
{
uchar ntlmv2_response[16];
DATA_BLOB ntlmv2_client_data;
DATA_BLOB final_response;
/* NTLMv2 */
/* generate some data to pass into the response function - including
the hostname and domain name of the server */
ntlmv2_client_data = NTLMv2_generate_client_data(names_blob);
/* Given that data, and the challenge from the server, generate a response */
SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &ntlmv2_client_data, ntlmv2_response);
final_response = data_blob(NULL, sizeof(ntlmv2_response) + ntlmv2_client_data.length);
memcpy(final_response.data, ntlmv2_response, sizeof(ntlmv2_response));
memcpy(final_response.data+sizeof(ntlmv2_response),
ntlmv2_client_data.data, ntlmv2_client_data.length);
data_blob_free(&ntlmv2_client_data);
return final_response;
}
static DATA_BLOB LMv2_generate_response(const uchar ntlm_v2_hash[16],
const DATA_BLOB *server_chal)
{
uchar lmv2_response[16];
DATA_BLOB lmv2_client_data = data_blob(NULL, 8);
DATA_BLOB final_response = data_blob(NULL, 24);
/* LMv2 */
/* client-supplied random data */
generate_random_buffer(lmv2_client_data.data, lmv2_client_data.length);
/* Given that data, and the challenge from the server, generate a response */
SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &lmv2_client_data, lmv2_response);
memcpy(final_response.data, lmv2_response, sizeof(lmv2_response));
/* after the first 16 bytes is the random data we generated above,
so the server can verify us with it */
memcpy(final_response.data+sizeof(lmv2_response),
lmv2_client_data.data, lmv2_client_data.length);
data_blob_free(&lmv2_client_data);
return final_response;
}
bool SMBNTLMv2encrypt_hash(const char *user, const char *domain, const uchar nt_hash[16],
const DATA_BLOB *server_chal,
const DATA_BLOB *names_blob,
DATA_BLOB *lm_response, DATA_BLOB *nt_response,
DATA_BLOB *user_session_key)
{
uchar ntlm_v2_hash[16];
/* We don't use the NT# directly. Instead we use it mashed up with
the username and domain.
This prevents username swapping during the auth exchange
*/
if (!ntv2_owf_gen(nt_hash, user, domain, True, ntlm_v2_hash)) {
return False;
}
if (nt_response) {
*nt_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal,
names_blob);
if (user_session_key) {
*user_session_key = data_blob(NULL, 16);
/* The NTLMv2 calculations also provide a session key, for signing etc later */
/* use only the first 16 bytes of nt_response for session key */
SMBsesskeygen_ntv2(ntlm_v2_hash, nt_response->data, user_session_key->data);
}
}
/* LMv2 */
if (lm_response) {
*lm_response = LMv2_generate_response(ntlm_v2_hash, server_chal);
}
return True;
}
/* Plaintext version of the above. */
bool SMBNTLMv2encrypt(const char *user, const char *domain, const char *password,
const DATA_BLOB *server_chal,
const DATA_BLOB *names_blob,
DATA_BLOB *lm_response, DATA_BLOB *nt_response,
DATA_BLOB *user_session_key)
{
uchar nt_hash[16];
E_md4hash(password, nt_hash);
return SMBNTLMv2encrypt_hash(user, domain, nt_hash,
server_chal,
names_blob,
lm_response, nt_response,
user_session_key);
}
/***********************************************************
encode a password buffer with a unicode password. The buffer
is filled with random data to make it harder to attack.
************************************************************/
bool encode_pw_buffer(uint8 buffer[516], const char *password, int string_flags)
{
uchar new_pw[512];
size_t new_pw_len;
/* the incoming buffer can be any alignment. */
string_flags |= STR_NOALIGN;
new_pw_len = push_string(NULL, new_pw,
password,
sizeof(new_pw), string_flags);
memcpy(&buffer[512 - new_pw_len], new_pw, new_pw_len);
generate_random_buffer(buffer, 512 - new_pw_len);
/*
* The length of the new password is in the last 4 bytes of
* the data buffer.
*/
SIVAL(buffer, 512, new_pw_len);
ZERO_STRUCT(new_pw);
return True;
}
/***********************************************************
decode a password buffer
*new_pw_len is the length in bytes of the possibly mulitbyte
returned password including termination.
************************************************************/
bool decode_pw_buffer(TALLOC_CTX *ctx,
uint8 in_buffer[516],
char **pp_new_pwrd,
uint32 *new_pw_len,
int string_flags)
{
int byte_len=0;
*pp_new_pwrd = NULL;
*new_pw_len = 0;
/* the incoming buffer can be any alignment. */
string_flags |= STR_NOALIGN;
/*
Warning !!! : This function is called from some rpc call.
The password IN the buffer may be a UNICODE string.
The password IN new_pwrd is an ASCII string
If you reuse that code somewhere else check first.
*/
/* The length of the new password is in the last 4 bytes of the data buffer. */
byte_len = IVAL(in_buffer, 512);
#ifdef DEBUG_PASSWORD
dump_data(100, in_buffer, 516);
#endif
/* Password cannot be longer than the size of the password buffer */
if ( (byte_len < 0) || (byte_len > 512)) {
DEBUG(0, ("decode_pw_buffer: incorrect password length (%d).\n", byte_len));
DEBUG(0, ("decode_pw_buffer: check that 'encrypt passwords = yes'\n"));
return false;
}
/* decode into the return buffer. */
*new_pw_len = pull_string_talloc(ctx,
NULL,
0,
pp_new_pwrd,
&in_buffer[512 - byte_len],
byte_len,
string_flags);
if (!*pp_new_pwrd || *new_pw_len == 0) {
DEBUG(0, ("decode_pw_buffer: pull_string_talloc failed\n"));
return false;
}
#ifdef DEBUG_PASSWORD
DEBUG(100,("decode_pw_buffer: new_pwrd: "));
dump_data(100, (uint8 *)*pp_new_pwrd, *new_pw_len);
DEBUG(100,("multibyte len:%d\n", *new_pw_len));
DEBUG(100,("original char len:%d\n", byte_len/2));
#endif
return true;
}
/***********************************************************
Decode an arc4 encrypted password change buffer.
************************************************************/
void encode_or_decode_arc4_passwd_buffer(unsigned char pw_buf[532], const DATA_BLOB *psession_key)
{
struct MD5Context tctx;
unsigned char key_out[16];
/* Confounder is last 16 bytes. */
MD5Init(&tctx);
MD5Update(&tctx, &pw_buf[516], 16);
MD5Update(&tctx, psession_key->data, psession_key->length);
MD5Final(key_out, &tctx);
/* arc4 with key_out. */
SamOEMhash(pw_buf, key_out, 516);
}
/***********************************************************
Encrypt/Decrypt used for LSA secrets and trusted domain
passwords.
************************************************************/
void sess_crypt_blob(DATA_BLOB *out, const DATA_BLOB *in, const DATA_BLOB *session_key, int forward)
{
int i, k;
for (i=0,k=0;
i<in->length;
i += 8, k += 7) {
uint8 bin[8], bout[8], key[7];
memset(bin, 0, 8);
memcpy(bin, &in->data[i], MIN(8, in->length-i));
if (k + 7 > session_key->length) {
k = (session_key->length - k);
}
memcpy(key, &session_key->data[k], 7);
des_crypt56(bout, bin, key, forward?1:0);
memcpy(&out->data[i], bout, MIN(8, in->length-i));
}
}
/* Decrypts password-blob with session-key
* @param pass password for session-key
* @param data_in DATA_BLOB encrypted password
*
* Returns cleartext password in CH_UNIX
* Caller must free the returned string
*/
char *decrypt_trustdom_secret(const char *pass, DATA_BLOB *data_in)
{
DATA_BLOB data_out, sess_key;
uchar nt_hash[16];
uint32_t length;
uint32_t version;
fstring cleartextpwd;
if (!data_in || !pass)
return NULL;
/* generate md4 password-hash derived from the NT UNICODE password */
E_md4hash(pass, nt_hash);
/* hashed twice with md4 */
mdfour(nt_hash, nt_hash, 16);
/* 16-Byte session-key */
sess_key = data_blob(nt_hash, 16);
if (sess_key.data == NULL)
return NULL;
data_out = data_blob(NULL, data_in->length);
if (data_out.data == NULL)
return NULL;
/* decrypt with des3 */
sess_crypt_blob(&data_out, data_in, &sess_key, 0);
/* 4 Byte length, 4 Byte version */
length = IVAL(data_out.data, 0);
version = IVAL(data_out.data, 4);
if (length > data_in->length - 8) {
DEBUG(0,("decrypt_trustdom_secret: invalid length (%d)\n", length));
return NULL;
}
if (version != 1) {
DEBUG(0,("decrypt_trustdom_secret: unknown version number (%d)\n", version));
return NULL;
}
rpcstr_pull(cleartextpwd, data_out.data + 8, sizeof(fstring), length, 0 );
#ifdef DEBUG_PASSWORD
DEBUG(100,("decrypt_trustdom_secret: length is: %d, version is: %d, password is: %s\n",
length, version, cleartextpwd));
#endif
data_blob_free(&data_out);
data_blob_free(&sess_key);
return SMB_STRDUP(cleartextpwd);
}
/* encode a wkssvc_PasswordBuffer:
*
* similar to samr_CryptPasswordEx. Different: 8byte confounder (instead of
* 16byte), confounder in front of the 516 byte buffer (instead of after that
* buffer), calling MD5Update() first with session_key and then with confounder
* (vice versa in samr) - Guenther */
static void encode_wkssvc_join_password_buffer(TALLOC_CTX *mem_ctx,
const char *pwd,
DATA_BLOB *session_key,
struct wkssvc_PasswordBuffer *pwd_buf)
{
uint8_t buffer[516];
struct MD5Context ctx;
DATA_BLOB confounded_session_key = data_blob_talloc(mem_ctx, NULL, 16);
int confounder_len = 8;
uint8_t confounder[8];
encode_pw_buffer(buffer, pwd, STR_UNICODE);
generate_random_buffer((uint8_t *)confounder, confounder_len);
MD5Init(&ctx);
MD5Update(&ctx, session_key->data, session_key->length);
MD5Update(&ctx, confounder, confounder_len);
MD5Final(confounded_session_key.data, &ctx);
SamOEMhashBlob(buffer, 516, &confounded_session_key);
memcpy(&pwd_buf->data[0], confounder, confounder_len);
memcpy(&pwd_buf->data[8], buffer, 516);
data_blob_free(&confounded_session_key);
}
|