// Copyright (C) 2009,2010,2011,2012 GlavSoft LLC.
// All rights reserved.
//
//-------------------------------------------------------------------------
// This file is part of the TightVNC software.  Please visit our Web site:
//
//                       http://www.tightvnc.com/
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//-------------------------------------------------------------------------
//

#include "inttypes.h"

// Encrypt the given buffer.
// The sizes of both "dst" and "src" must be multiples of 8.
// Both "dst" and "src" may point to the same buffer.
void encrypt(UINT8* dst, const UINT8* src, size_t dataLen, const UINT8* key);

// Decrypt the given buffer.
// The sizes of both "dst" and "src" must be multiples of 8.
// Both "dst" and "src" may point to the same buffer.
void decrypt(UINT8* dst, const UINT8* src, size_t dataLen, const UINT8* key);
void clearKey();

// Sets the internal key register according to the hexadecimal
// key contained in the 8 bytes of hexkey, according to the DES,
// for encryption or decryption according to mode.
void deskey(const UINT8 hexKey[8], int mode);

// Encrypts/Decrypts (according to the key currently loaded in the
// internal key register) one block of eight bytes at address 'from'
// into the block at address 'to'.  They can be the same.
void des(const unsigned char from[8], unsigned char to[8]);

static void scrunch(const unsigned char* outof, unsigned long* into);
static void unscrun(const unsigned long* outof, unsigned char* into);
static void desfunc(unsigned long* block, unsigned long* keys);
void cookey(register unsigned long* raw1);
void usekey(register unsigned long* from);


unsigned long m_knL[32];