package org.jopenray.rfb;
//
// This DES class has been extracted from package Acme.Crypto for use in VNC.
// The bytebit[] array has been reversed so that the most significant bit
// in each byte of the key is ignored, not the least significant. Also the
// unnecessary odd parity code has been removed.
//
// These changes are:
// Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
//
// This software 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.
//
// DesCipher - the DES encryption method
//
// The meat of this code is by Dave Zimmerman <dzimm@widget.com>, and is:
//
// Copyright (c) 1996 Widget Workshop, Inc. All Rights Reserved.
//
// Permission to use, copy, modify, and distribute this software
// and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
// without fee is hereby granted, provided that this copyright notice is kept
// intact.
//
// WIDGET WORKSHOP MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
// OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE, OR NON-INFRINGEMENT. WIDGET WORKSHOP SHALL NOT BE LIABLE
// FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
// DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
//
// THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
// CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
// PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
// NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
// SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
// SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
// PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). WIDGET WORKSHOP
// SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
// HIGH RISK ACTIVITIES.
//
//
// The rest is:
//
// Copyright (C) 1996 by Jef Poskanzer <jef@acme.com>. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// Visit the ACME Labs Java page for up-to-date versions of this and other
// fine Java utilities: http://www.acme.com/java/
/// The DES encryption method.
// <P>
// This is surprisingly fast, for pure Java. On a SPARC 20, wrapped
// in Acme.Crypto.EncryptedOutputStream or Acme.Crypto.EncryptedInputStream,
// it does around 7000 bytes/second.
// <P>
// Most of this code is by Dave Zimmerman <dzimm@widget.com>, and is
// Copyright (c) 1996 Widget Workshop, Inc. See the source file for details.
// <P>
// <A HREF="/resources/classes/Acme/Crypto/DesCipher.java">Fetch the software.</A><BR>
// <A HREF="/resources/classes/Acme.tar.Z">Fetch the entire Acme package.</A>
// <P>
// @see Des3Cipher
// @see EncryptedOutputStream
// @see EncryptedInputStream
public class DesCipher {
// Constructor, byte-array key.
public DesCipher(byte[] key) {
setKey(key);
}
// Key routines.
private int[] encryptKeys = new int[32];
private int[] decryptKeys = new int[32];
// / Set the key.
public void setKey(byte[] key) {
deskey(key, true, encryptKeys);
deskey(key, false, decryptKeys);
}
// Turn an 8-byte key into internal keys.
private void deskey(byte[] keyBlock, boolean encrypting, int[] KnL) {
int i, j, l, m, n;
int[] pc1m = new int[56];
int[] pcr = new int[56];
int[] kn = new int[32];
for (j = 0; j < 56; ++j) {
l = pc1[j];
m = l & 07;
pc1m[j] = ((keyBlock[l >>> 3] & bytebit[m]) != 0) ? 1 : 0;
}
for (i = 0; i < 16; ++i) {
if (encrypting)
m = i << 1;
else
m = (15 - i) << 1;
n = m + 1;
kn[m] = kn[n] = 0;
for (j = 0; j < 28; ++j) {
l = j + totrot[i];
if (l < 28)
pcr[j] = pc1m[l];
else
pcr[j] = pc1m[l - 28];
}
for (j = 28; j < 56; ++j) {
l = j + totrot[i];
if (l < 56)
pcr[j] = pc1m[l];
else
pcr[j] = pc1m[l - 28];
}
for (j = 0; j < 24; ++j) {
if (pcr[pc2[j]] != 0)
kn[m] |= bigbyte[j];
if (pcr[pc2[j + 24]] != 0)
kn[n] |= bigbyte[j];
}
}
cookey(kn, KnL);
}
private void cookey(int[] raw, int KnL[]) {
int raw0, raw1;
int rawi, KnLi;
int i;
for (i = 0, rawi = 0, KnLi = 0; i < 16; ++i) {
raw0 = raw[rawi++];
raw1 = raw[rawi++];
KnL[KnLi] = (raw0 & 0x00fc0000) << 6;
KnL[KnLi] |= (raw0 & 0x00000fc0) << 10;
KnL[KnLi] |= (raw1 & 0x00fc0000) >>> 10;
KnL[KnLi] |= (raw1 & 0x00000fc0) >>> 6;
++KnLi;
KnL[KnLi] = (raw0 & 0x0003f000) << 12;
KnL[KnLi] |= (raw0 & 0x0000003f) << 16;
KnL[KnLi] |= (raw1 & 0x0003f000) >>> 4;
KnL[KnLi] |= (raw1 & 0x0000003f);
++KnLi;
}
}
// Block encryption routines.
private int[] tempInts = new int[2];
// / Encrypt a block of eight bytes.
public void encrypt(byte[] clearText, int clearOff, byte[] cipherText,
int cipherOff) {
squashBytesToInts(clearText, clearOff, tempInts, 0, 2);
des(tempInts, tempInts, encryptKeys);
spreadIntsToBytes(tempInts, 0, cipherText, cipherOff, 2);
}
// / Decrypt a block of eight bytes.
public void decrypt(byte[] cipherText, int cipherOff, byte[] clearText,
int clearOff) {
squashBytesToInts(cipherText, cipherOff, tempInts, 0, 2);
des(tempInts, tempInts, decryptKeys);
spreadIntsToBytes(tempInts, 0, clearText, clearOff, 2);
}
// The DES function.
private void des(int[] inInts, int[] outInts, int[] keys) {
int fval, work, right, leftt;
int round;
int keysi = 0;
leftt = inInts[0];
right = inInts[1];
work = ((leftt >>> 4) ^ right) & 0x0f0f0f0f;
right ^= work;
leftt ^= (work << 4);
work = ((leftt >>> 16) ^ right) & 0x0000ffff;
right ^= work;
leftt ^= (work << 16);
work = ((right >>> 2) ^ leftt) & 0x33333333;
leftt ^= work;
right ^= (work << 2);
work = ((right >>> 8) ^ leftt) & 0x00ff00ff;
leftt ^= work;
right ^= (work << 8);
right = (right << 1) | ((right >>> 31) & 1);
work = (leftt ^ right) & 0xaaaaaaaa;
leftt ^= work;
right ^= work;
leftt = (leftt << 1) | ((leftt >>> 31) & 1);
for (round = 0; round < 8; ++round) {
work = (right << 28) | (right >>> 4);
work ^= keys[keysi++];
fval = SP7[work & 0x0000003f];
fval |= SP5[(work >>> 8) & 0x0000003f];
fval |= SP3[(work >>> 16) & 0x0000003f];
fval |= SP1[(work >>> 24) & 0x0000003f];
work = right ^ keys[keysi++];
fval |= SP8[work & 0x0000003f];
fval |= SP6[(work >>> 8) & 0x0000003f];
fval |= SP4[(work >>> 16) & 0x0000003f];
fval |= SP2[(work >>> 24) & 0x0000003f];
leftt ^= fval;
work = (leftt << 28) | (leftt >>> 4);
work ^= keys[keysi++];
fval = SP7[work & 0x0000003f];
fval |= SP5[(work >>> 8) & 0x0000003f];
fval |= SP3[(work >>> 16) & 0x0000003f];
fval |= SP1[(work >>> 24) & 0x0000003f];
work = leftt ^ keys[keysi++];
fval |= SP8[work & 0x0000003f];
fval |= SP6[(work >>> 8) & 0x0000003f];
fval |= SP4[(work >>> 16) & 0x0000003f];
fval |= SP2[(work >>> 24) & 0x0000003f];
right ^= fval;
}
right = (right << 31) | (right >>> 1);
work = (leftt ^ right) & 0xaaaaaaaa;
leftt ^= work;
right ^= work;
leftt = (leftt << 31) | (leftt >>> 1);
work = ((leftt >>> 8) ^ right) & 0x00ff00ff;
right ^= work;
leftt ^= (work << 8);
work = ((leftt >>> 2) ^ right) & 0x33333333;
right ^= work;
leftt ^= (work << 2);
work = ((right >>> 16) ^ leftt) & 0x0000ffff;
leftt ^= work;
right ^= (work << 16);
work = ((right >>> 4) ^ leftt) & 0x0f0f0f0f;
leftt ^= work;
right ^= (work << 4);
outInts[0] = right;
outInts[1] = leftt;
}
// Tables, permutations, S-boxes, etc.
private static byte[] bytebit = { (byte) 0x01, (byte) 0x02, (byte) 0x04,
(byte) 0x08, (byte) 0x10, (byte) 0x20, (byte) 0x40, (byte) 0x80 };
private static int[] bigbyte = { 0x800000, 0x400000, 0x200000, 0x100000,
0x080000, 0x040000, 0x020000, 0x010000, 0x008000, 0x004000,
0x002000, 0x001000, 0x000800, 0x000400, 0x000200, 0x000100,
0x000080, 0x000040, 0x000020, 0x000010, 0x000008, 0x000004,
0x000002, 0x000001 };
private static byte[] pc1 = { (byte) 56, (byte) 48, (byte) 40, (byte) 32,
(byte) 24, (byte) 16, (byte) 8, (byte) 0, (byte) 57, (byte) 49,
(byte) 41, (byte) 33, (byte) 25, (byte) 17, (byte) 9, (byte) 1,
(byte) 58, (byte) 50, (byte) 42, (byte) 34, (byte) 26, (byte) 18,
(byte) 10, (byte) 2, (byte) 59, (byte) 51, (byte) 43, (byte) 35,
(byte) 62, (byte) 54, (byte) 46, (byte) 38, (byte) 30, (byte) 22,
(byte) 14, (byte) 6, (byte) 61, (byte) 53, (byte) 45, (byte) 37,
(byte) 29, (byte) 21, (byte) 13, (byte) 5, (byte) 60, (byte) 52,
(byte) 44, (byte) 36, (byte) 28, (byte) 20, (byte) 12, (byte) 4,
(byte) 27, (byte) 19, (byte) 11, (byte) 3 };
private static int[] totrot = { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21,
23, 25, 27, 28 };
private static byte[] pc2 = { (byte) 13, (byte) 16, (byte) 10, (byte) 23,
(byte) 0, (byte) 4, (byte) 2, (byte) 27, (byte) 14, (byte) 5,
(byte) 20, (byte) 9, (byte) 22, (byte) 18, (byte) 11, (byte) 3,
(byte) 25, (byte) 7, (byte) 15, (byte) 6, (byte) 26, (byte) 19,
(byte) 12, (byte) 1, (byte) 40, (byte) 51, (byte) 30, (byte) 36,
(byte) 46, (byte) 54, (byte) 29, (byte) 39, (byte) 50, (byte) 44,
(byte) 32, (byte) 47, (byte) 43, (byte) 48, (byte) 38, (byte) 55,
(byte) 33, (byte) 52, (byte) 45, (byte) 41, (byte) 49, (byte) 35,
(byte) 28, (byte) 31, };
private static int[] SP1 = { 0x01010400, 0x00000000, 0x00010000,
0x01010404, 0x01010004, 0x00010404, 0x00000004, 0x00010000,
0x00000400, 0x01010400, 0x01010404, 0x00000400, 0x01000404,
0x01010004, 0x01000000, 0x00000004, 0x00000404, 0x01000400,
0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000,
0x01000404, 0x00010004, 0x01000004, 0x01000004, 0x00010004,
0x00000000, 0x00000404, 0x00010404, 0x01000000, 0x00010000,
0x01010404, 0x00000004, 0x01010000, 0x01010400, 0x01000000,
0x01000000, 0x00000400, 0x01010004, 0x00010000, 0x00010400,
0x01000004, 0x00000400, 0x00000004, 0x01000404, 0x00010404,
0x01010404, 0x00010004, 0x01010000, 0x01000404, 0x01000004,
0x00000404, 0x00010404, 0x01010400, 0x00000404, 0x01000400,
0x01000400, 0x00000000, 0x00010004, 0x00010400, 0x00000000,
0x01010004 };
private static int[] SP2 = { 0x80108020, 0x80008000, 0x00008000,
0x00108020, 0x00100000, 0x00000020, 0x80100020, 0x80008020,
0x80000020, 0x80108020, 0x80108000, 0x80000000, 0x80008000,
0x00100000, 0x00000020, 0x80100020, 0x00108000, 0x00100020,
0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020,
0x80100000, 0x00100020, 0x80000020, 0x00000000, 0x00108000,
0x00008020, 0x80108000, 0x80100000, 0x00008020, 0x00000000,
0x00108020, 0x80100020, 0x00100000, 0x80008020, 0x80100000,
0x80108000, 0x00008000, 0x80100000, 0x80008000, 0x00000020,
0x80108020, 0x00108020, 0x00000020, 0x00008000, 0x80000000,
0x00008020, 0x80108000, 0x00100000, 0x80000020, 0x00100020,
0x80008020, 0x80000020, 0x00100020, 0x00108000, 0x00000000,
0x80008000, 0x00008020, 0x80000000, 0x80100020, 0x80108020,
0x00108000 };
private static int[] SP3 = { 0x00000208, 0x08020200, 0x00000000,
0x08020008, 0x08000200, 0x00000000, 0x00020208, 0x08000200,
0x00020008, 0x08000008, 0x08000008, 0x00020000, 0x08020208,
0x00020008, 0x08020000, 0x00000208, 0x08000000, 0x00000008,
0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008,
0x00020208, 0x08000208, 0x00020200, 0x00020000, 0x08000208,
0x00000008, 0x08020208, 0x00000200, 0x08000000, 0x08020200,
0x08000000, 0x00020008, 0x00000208, 0x00020000, 0x08020200,
0x08000200, 0x00000000, 0x00000200, 0x00020008, 0x08020208,
0x08000200, 0x08000008, 0x00000200, 0x00000000, 0x08020008,
0x08000208, 0x00020000, 0x08000000, 0x08020208, 0x00000008,
0x00020208, 0x00020200, 0x08000008, 0x08020000, 0x08000208,
0x00000208, 0x08020000, 0x00020208, 0x00000008, 0x08020008,
0x00020200 };
private static int[] SP4 = { 0x00802001, 0x00002081, 0x00002081,
0x00000080, 0x00802080, 0x00800081, 0x00800001, 0x00002001,
0x00000000, 0x00802000, 0x00802000, 0x00802081, 0x00000081,
0x00000000, 0x00800080, 0x00800001, 0x00000001, 0x00002000,
0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001,
0x00002080, 0x00800081, 0x00000001, 0x00002080, 0x00800080,
0x00002000, 0x00802080, 0x00802081, 0x00000081, 0x00800080,
0x00800001, 0x00802000, 0x00802081, 0x00000081, 0x00000000,
0x00000000, 0x00802000, 0x00002080, 0x00800080, 0x00800081,
0x00000001, 0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802081, 0x00000081, 0x00000001, 0x00002000, 0x00800001,
0x00002001, 0x00802080, 0x00800081, 0x00002001, 0x00002080,
0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002000,
0x00802080 };
private static int[] SP5 = { 0x00000100, 0x02080100, 0x02080000,
0x42000100, 0x00080000, 0x00000100, 0x40000000, 0x02080000,
0x40080100, 0x00080000, 0x02000100, 0x40080100, 0x42000100,
0x42080000, 0x00080100, 0x40000000, 0x02000000, 0x40080000,
0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100,
0x02000100, 0x42080000, 0x40000100, 0x00000000, 0x42000000,
0x02080100, 0x02000000, 0x42000000, 0x00080100, 0x00080000,
0x42000100, 0x00000100, 0x02000000, 0x40000000, 0x02080000,
0x42000100, 0x40080100, 0x02000100, 0x40000000, 0x42080000,
0x02080100, 0x40080100, 0x00000100, 0x02000000, 0x42080000,
0x42080100, 0x00080100, 0x42000000, 0x42080100, 0x02080000,
0x00000000, 0x40080000, 0x42000000, 0x00080100, 0x02000100,
0x40000100, 0x00080000, 0x00000000, 0x40080000, 0x02080100,
0x40000100 };
private static int[] SP6 = { 0x20000010, 0x20400000, 0x00004000,
0x20404010, 0x20400000, 0x00000010, 0x20404010, 0x00400000,
0x20004000, 0x00404010, 0x00400000, 0x20000010, 0x00400010,
0x20004000, 0x20000000, 0x00004010, 0x00000000, 0x00400010,
0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010,
0x20400010, 0x20400010, 0x00000000, 0x00404010, 0x20404000,
0x00004010, 0x00404000, 0x20404000, 0x20000000, 0x20004000,
0x00000010, 0x20400010, 0x00404000, 0x20404010, 0x00400000,
0x00004010, 0x20000010, 0x00400000, 0x20004000, 0x20000000,
0x00004010, 0x20000010, 0x20404010, 0x00404000, 0x20400000,
0x00404010, 0x20404000, 0x00000000, 0x20400010, 0x00000010,
0x00004000, 0x20400000, 0x00404010, 0x00004000, 0x00400010,
0x20004010, 0x00000000, 0x20404000, 0x20000000, 0x00400010,
0x20004010 };
private static int[] SP7 = { 0x00200000, 0x04200002, 0x04000802,
0x00000000, 0x00000800, 0x04000802, 0x00200802, 0x04200800,
0x04200802, 0x00200000, 0x00000000, 0x04000002, 0x00000002,
0x04000000, 0x04200002, 0x00000802, 0x04000800, 0x00200802,
0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800,
0x00200002, 0x04200000, 0x00000800, 0x00000802, 0x04200802,
0x00200800, 0x00000002, 0x04000000, 0x00200800, 0x04000000,
0x00200800, 0x00200000, 0x04000802, 0x04000802, 0x04200002,
0x04200002, 0x00000002, 0x00200002, 0x04000000, 0x04000800,
0x00200000, 0x04200800, 0x00000802, 0x00200802, 0x04200800,
0x00000802, 0x04000002, 0x04200802, 0x04200000, 0x00200800,
0x00000000, 0x00000002, 0x04200802, 0x00000000, 0x00200802,
0x04200000, 0x00000800, 0x04000002, 0x04000800, 0x00000800,
0x00200002 };
private static int[] SP8 = { 0x10001040, 0x00001000, 0x00040000,
0x10041040, 0x10000000, 0x10001040, 0x00000040, 0x10000000,
0x00040040, 0x10040000, 0x10041040, 0x00041000, 0x10041000,
0x00041040, 0x00001000, 0x00000040, 0x10040000, 0x10000040,
0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040,
0x10041000, 0x00001040, 0x00000000, 0x00000000, 0x10040040,
0x10000040, 0x10001000, 0x00041040, 0x00040000, 0x00041040,
0x00040000, 0x10041000, 0x00001000, 0x00000040, 0x10040040,
0x00001000, 0x00041040, 0x10001000, 0x00000040, 0x10000040,
0x10040000, 0x10040040, 0x10000000, 0x00040000, 0x10001040,
0x00000000, 0x10041040, 0x00040040, 0x10000040, 0x10040000,
0x10001000, 0x10001040, 0x00000000, 0x10041040, 0x00041000,
0x00041000, 0x00001040, 0x00001040, 0x00040040, 0x10000000,
0x10041000 };
// Routines taken from other parts of the Acme utilities.
// / Squash bytes down to ints.
public static void squashBytesToInts(byte[] inBytes, int inOff,
int[] outInts, int outOff, int intLen) {
for (int i = 0; i < intLen; ++i)
outInts[outOff + i] = ((inBytes[inOff + i * 4] & 0xff) << 24)
| ((inBytes[inOff + i * 4 + 1] & 0xff) << 16)
| ((inBytes[inOff + i * 4 + 2] & 0xff) << 8)
| (inBytes[inOff + i * 4 + 3] & 0xff);
}
// / Spread ints into bytes.
public static void spreadIntsToBytes(int[] inInts, int inOff,
byte[] outBytes, int outOff, int intLen) {
for (int i = 0; i < intLen; ++i) {
outBytes[outOff + i * 4] = (byte) (inInts[inOff + i] >>> 24);
outBytes[outOff + i * 4 + 1] = (byte) (inInts[inOff + i] >>> 16);
outBytes[outOff + i * 4 + 2] = (byte) (inInts[inOff + i] >>> 8);
outBytes[outOff + i * 4 + 3] = (byte) inInts[inOff + i];
}
}
}