2 Unix SMB/Netbios implementation.
4 code to manipulate domain credentials
5 Copyright (C) Andrew Tridgell 1997
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 /****************************************************************************
26 setup the session key.
27 Input: 8 byte challenge block
28 8 byte server challenge block
29 16 byte md4 encrypted password
32 ****************************************************************************/
33 void cred_session_key(char *challenge, char *srv_challenge, char *pass,
40 sum[0] = IVAL(challenge, 0) + IVAL(srv_challenge, 0);
41 sum[1] = IVAL(challenge, 4) + IVAL(srv_challenge, 4);
47 E1(pass+9,buf,session_key);
51 /****************************************************************************
56 8 byte stored credential
61 ****************************************************************************/
62 void cred_create(char *session_key, char *stored_cred, UTIME timestamp,
69 memcpy(timecred, stored_cred, 8);
70 SIVAL(timecred, 0, IVAL(stored_cred, 0) + timestamp.time);
72 E1(session_key, timecred, buf);
74 key2[0] = session_key[7];
79 /****************************************************************************
80 check a supplied credential
83 8 byte received credential
85 8 byte stored credential
89 returns 1 if computed credential matches received credential
91 ****************************************************************************/
92 int cred_assert(char *cred, char *session_key, char *stored_cred,
97 cred_create(session_key, stored_cred, timestamp, cred2);
99 return memcmp(cred, cred2, 8) == 0;