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/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-1997
Modified by Jeremy Allison 1995.
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"
extern int DEBUGLEVEL;
#include "byteorder.h"
/*
This implements the X/Open SMB password encryption
It takes a password, a 8 byte "crypt key" and puts 24 bytes of
encrypted password into p24 */
void SMBencrypt(uchar *passwd, uchar *c8, uchar *p24)
{
uchar p14[15], p21[21];
memset(p21,'\0',21);
memset(p14,'\0',14);
StrnCpy((char *)p14,(char *)passwd,14);
strupper((char *)p14);
E_P16(p14, p21);
E_P24(p21, c8, p24);
}
/* Routines for Windows NT MD4 Hash functions. */
static int _my_wcslen(int16 *str)
{
int len = 0;
while(*str++ != 0)
len++;
return len;
}
/*
* Convert a string into an NT UNICODE string.
* Note that regardless of processor type
* this must be in intel (little-endian)
* format.
*/
static int _my_mbstowcs(int16 *dst, uchar *src, int len)
{
int i;
int16 val;
for(i = 0; i < len; i++) {
val = *src;
SSVAL(dst,0,val);
dst++;
src++;
if(val == 0)
break;
}
return i;
}
/*
* Creates the MD4 Hash of the users password in NT UNICODE.
*/
void E_md4hash(uchar *passwd, uchar *p16)
{
int len;
int16 wpwd[129];
/* Password cannot be longer than 128 characters */
len = strlen((char *)passwd);
if(len > 128)
len = 128;
/* Password must be converted to NT unicode */
_my_mbstowcs(wpwd, passwd, len);
wpwd[len] = 0; /* Ensure string is null terminated */
/* Calculate length in bytes */
len = _my_wcslen(wpwd) * sizeof(int16);
mdfour(p16, (unsigned char *)wpwd, len);
}
/* Does the NT MD4 hash then des encryption. */
void SMBNTencrypt(uchar *passwd, uchar *c8, uchar *p24)
{
uchar p21[21];
memset(p21,'\0',21);
E_md4hash(passwd, p21);
E_P24(p21, c8, p24);
}
/* Does both the NT and LM owfs of a user's password */
void nt_lm_owf_gen(char *pwd, char *nt_p16, char *p16)
{
char passwd[130];
StrnCpy(passwd, pwd, sizeof(passwd)-1);
/* Calculate the MD4 hash (NT compatible) of the password */
memset(nt_p16, '\0', 16);
E_md4hash((uchar *)passwd, (uchar *)nt_p16);
/* Mangle the passwords into Lanman format */
passwd[14] = '\0';
strupper(passwd);
/* Calculate the SMB (lanman) hash functions of the password */
memset(p16, '\0', 16);
E_P16((uchar *) passwd, (uchar *)p16);
/* clear out local copy of user's password (just being paranoid). */
bzero(passwd, sizeof(passwd));
}
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