/*
* Ported from Flashlight VNC ActionScript implementation:
* http://www.wizhelp.com/flashlight-vnc/
*
* Full attribution follows:
*
* -------------------------------------------------------------------------
*
* 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/
*/
"use strict";
/*jslint white: false, bitwise: false, plusplus: false */
var DES = {
// Tables, permutations, S-boxes, etc.
bytebit : [0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80],
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],
pc1 : [ 56, 48, 40, 32,
24, 16, 8, 0, 57, 49,
41, 33, 25, 17, 9, 1,
58, 50, 42, 34, 26, 18,
10, 2, 59, 51, 43, 35,
62, 54, 46, 38, 30, 22,
14, 6, 61, 53, 45, 37,
29, 21, 13, 5, 60, 52,
44, 36, 28, 20, 12, 4,
27, 19, 11, 3 ],
totrot : [ 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21,
23, 25, 27, 28],
pc2 : [ 13, 16, 10, 23,
0, 4, 2, 27, 14, 5,
20, 9, 22, 18, 11, 3,
25, 7, 15, 6, 26, 19,
12, 1, 40, 51, 30, 36,
46, 54, 29, 39, 50, 44,
32, 47, 43, 48, 38, 55,
33, 52, 45, 41, 49, 35,
28, 31 ],
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],
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],
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],
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],
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],
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],
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],
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],
// Key routines.
encryptKeys : [],
decryptKeys : [],
// / Set the key.
setKeys : function(key) {
DES.encryptKeys = new Array(32);
DES.decryptKeys = new Array(32);
DES.deskey(key, true, DES.encryptKeys);
DES.deskey(key, false, DES.decryptKeys);
},
// Turn an 8-byte key into internal keys.
deskey : function(keyBlock, encrypting, KnL) {
var i, j, l, m, n,
pc1m = new Array(56),
pcr = new Array(56),
kn = new Array(32);
for (j = 0; j < 56; ++j) {
l = DES.pc1[j];
m = l & 0x7;
pc1m[j] = ((keyBlock[l >>> 3] & DES.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 + DES.totrot[i];
if (l < 28) {
pcr[j] = pc1m[l];
} else {
pcr[j] = pc1m[l - 28];
}
}
for (j = 28; j < 56; ++j) {
l = j + DES.totrot[i];
if (l < 56) {
pcr[j] = pc1m[l];
} else {
pcr[j] = pc1m[l - 28];
}
}
for (j = 0; j < 24; ++j) {
if (pcr[DES.pc2[j]] !== 0) {
kn[m] |= DES.bigbyte[j];
}
if (pcr[DES.pc2[j + 24]] !== 0) {
kn[n] |= DES.bigbyte[j];
}
}
}
DES.cookey(kn, KnL);
},
cookey: function(raw, KnL) {
var raw0, raw1,
rawi, KnLi,
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.
// / Encrypt a block of eight bytes.
encrypt: function(clearText, clearOff, cipherText, cipherOff) {
var tempInts = new Array(12);
DES.squashBytesToInts(clearText, clearOff, tempInts, 0, 2);
DES.des(tempInts, tempInts, DES.encryptKeys);
DES.spreadIntsToBytes(tempInts, 0, cipherText, cipherOff, 2);
},
// / Decrypt a block of eight bytes.
decrypt: function(cipherText, cipherOff, clearText, clearOff) {
var tempInts = new Array(12);
DES.squashBytesToInts(cipherText, cipherOff, tempInts, 0, 2);
DES.des(tempInts, tempInts, DES.decryptKeys);
DES.spreadIntsToBytes(tempInts, 0, clearText, clearOff, 2);
},
// The DES function.
des: function(inInts, outInts, keys) {
var fval, work, right, leftt,
round,
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 = DES.SP7[work & 0x0000003f];
fval |= DES.SP5[(work >>> 8) & 0x0000003f];
fval |= DES.SP3[(work >>> 16) & 0x0000003f];
fval |= DES.SP1[(work >>> 24) & 0x0000003f];
work = right ^ keys[keysi++];
fval |= DES.SP8[work & 0x0000003f];
fval |= DES.SP6[(work >>> 8) & 0x0000003f];
fval |= DES.SP4[(work >>> 16) & 0x0000003f];
fval |= DES.SP2[(work >>> 24) & 0x0000003f];
leftt ^= fval;
work = (leftt << 28) | (leftt >>> 4);
work ^= keys[keysi++];
fval = DES.SP7[work & 0x0000003f];
fval |= DES.SP5[(work >>> 8) & 0x0000003f];
fval |= DES.SP3[(work >>> 16) & 0x0000003f];
fval |= DES.SP1[(work >>> 24) & 0x0000003f];
work = leftt ^ keys[keysi++];
fval |= DES.SP8[work & 0x0000003f];
fval |= DES.SP6[(work >>> 8) & 0x0000003f];
fval |= DES.SP4[(work >>> 16) & 0x0000003f];
fval |= DES.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;
},
// Routines taken from other parts of the Acme utilities.
// / Squash bytes down to ints.
squashBytesToInts: function (inBytes, inOff, outInts, outOff, intLen) {
for (var 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 unsigned bytes.
spreadIntsToBytes: function (inInts, inOff, outBytes, outOff, intLen) {
var i, j, idx;
for (i = 0; i < intLen; ++i) {
outBytes[outOff + i * 4] = (inInts[inOff + i] >>> 24) % 256;
outBytes[outOff + i * 4+ 1] = (inInts[inOff + i] >>> 16) % 256;
outBytes[outOff + i * 4+ 2] = (inInts[inOff + i] >>> 8) % 256;
outBytes[outOff + i * 4+ 3] = (inInts[inOff + i]) % 256;
}
/* Make unsigned */
for (i = 0; i < intLen; ++i) {
for (j = 0; j < 4; j++) {
idx = outOff + i * 4 + j;
if (outBytes[idx] < 0) {
outBytes[idx] += 256;
}
}
}
}
};