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#ifdef SMB_PASSWD
/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-1995
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"
#include "des.h"
#include "md4.h"
extern int DEBUGLEVEL;
#include "byteorder.h"
void str_to_key(uchar *str,uchar *key)
{
void des_set_odd_parity(des_cblock *);
int i;
key[0] = str[0]>>1;
key[1] = ((str[0]&0x01)<<6) | (str[1]>>2);
key[2] = ((str[1]&0x03)<<5) | (str[2]>>3);
key[3] = ((str[2]&0x07)<<4) | (str[3]>>4);
key[4] = ((str[3]&0x0F)<<3) | (str[4]>>5);
key[5] = ((str[4]&0x1F)<<2) | (str[5]>>6);
key[6] = ((str[5]&0x3F)<<1) | (str[6]>>7);
key[7] = str[6]&0x7F;
for (i=0;i<8;i++) {
key[i] = (key[i]<<1);
}
des_set_odd_parity((des_cblock *)key);
}
void D1(uchar *k, uchar *d, uchar *out)
{
des_key_schedule ks;
des_cblock deskey;
str_to_key(k,(uchar *)deskey);
des_set_key(deskey,ks);
des_ecb_encrypt(d, out, ks, DES_DECRYPT);
}
void E1(uchar *k, uchar *d, uchar *out)
{
des_key_schedule ks;
des_cblock deskey;
str_to_key(k,(uchar *)deskey);
des_set_key(deskey,ks);
des_ecb_encrypt(d, out, ks, DES_ENCRYPT);
}
void E_P16(uchar *p14,uchar *p16)
{
uchar sp7[7];
/* the following constant makes us compatible with other
implementations. Note that publishing this constant does not reduce the
security of the encryption mechanism */
uchar sp8[] = {0xAA,0xD3,0xB4,0x35,0xB5,0x14,0x4,0xEE};
uchar x[8];
memset(sp7,'\0',7);
D1(sp7, sp8, x);
E1(p14, x, p16);
E1(p14+7, x, p16+8);
}
void E_P24(uchar *p21, uchar *c8, uchar *p24)
{
E1(p21, c8, p24);
E1(p21+7, c8, p24+8);
E1(p21+14, c8, p24+16);
}
/*
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 i, len;
int16 wpwd[129];
MDstruct MD;
/* 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);
MDbegin(&MD);
for(i = 0; i + 64 <= len; i += 64)
MDupdate(&MD,wpwd + (i/2), 512);
MDupdate(&MD,wpwd + (i/2),(len-i)*8);
SIVAL(p16,0,MD.buffer[0]);
SIVAL(p16,4,MD.buffer[1]);
SIVAL(p16,8,MD.buffer[2]);
SIVAL(p16,12,MD.buffer[3]);
}
/* 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);
}
#else
void smbencrypt_dummy(void){}
#endif
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