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/*
Unix SMB/CIFS implementation.
code to manipulate domain credentials
Copyright (C) Andrew Tridgell 1997-2003
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
initialise the credentials state
*/
void creds_init(struct netr_CredentialState *creds,
const struct netr_Credential *client_challenge,
const struct netr_Credential *server_challenge,
const uint8 machine_password[16])
{
struct netr_Credential time_cred;
uint32 sum[2];
uint8 sum2[8];
sum[0] = IVAL(client_challenge->data, 0) + IVAL(server_challenge->data, 0);
sum[1] = IVAL(client_challenge->data, 4) + IVAL(server_challenge->data, 4);
SIVAL(sum2,0,sum[0]);
SIVAL(sum2,4,sum[1]);
cred_hash1(creds->session_key, sum2, machine_password);
creds->sequence = 0;
SIVAL(time_cred.data, 0, IVAL(client_challenge->data, 0) + creds->sequence);
SIVAL(time_cred.data, 4, IVAL(client_challenge->data, 4));
cred_hash2(creds->client_cred.data, time_cred.data, creds->session_key);
creds->server_cred = *server_challenge;
}
/*
check that the credentials reply is correct then generate the next
set of credentials
*/
BOOL creds_next(struct netr_CredentialState *creds,
const struct netr_Credential *next)
{
struct netr_Credential cred2;
struct netr_Credential time_cred;
SIVAL(time_cred.data, 0, IVAL(creds->server_cred.data, 0) + creds->sequence);
SIVAL(time_cred.data, 4, IVAL(creds->server_cred.data, 4));
cred_hash2(cred2.data, time_cred.data, creds->session_key);
if (memcmp(next->data, cred2.data, 8) != 0) {
DEBUG(2,("credentials check failed\n"));
return False;
}
creds->server_cred = creds->client_cred;
SIVAL(time_cred.data, 0, IVAL(creds->client_cred.data, 0) + creds->sequence);
SIVAL(time_cred.data, 4, IVAL(creds->client_cred.data, 4));
cred_hash2(cred2.data, time_cred.data, creds->session_key);
creds->client_cred = cred2;
creds->sequence++;
return True;
}
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