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274 lines
10 KiB
274 lines
10 KiB
/*
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* Ported from Flashlight VNC ActionScript implementation:
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* http://www.wizhelp.com/flashlight-vnc/
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*
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* Full attribution follows:
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*
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* -------------------------------------------------------------------------
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*
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* This DES class has been extracted from package Acme.Crypto for use in VNC.
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* The unnecessary odd parity code has been removed.
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*
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* These changes are:
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* DesCipher - the DES encryption method
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*
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* The meat of this code is by Dave Zimmerman <dzimm@widget.com>, and is:
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*
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* Copyright (c) 1996 Widget Workshop, Inc. All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this software
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* and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
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* without fee is hereby granted, provided that this copyright notice is kept
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* intact.
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*
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* WIDGET WORKSHOP MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
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* OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. WIDGET WORKSHOP SHALL NOT BE LIABLE
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* FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
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*
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* THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
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* CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
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* PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
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* NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
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* SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
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* SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
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* PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). WIDGET WORKSHOP
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* SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
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* HIGH RISK ACTIVITIES.
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*
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*
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* The rest is:
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*
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* Copyright (C) 1996 by Jef Poskanzer <jef@acme.com>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Visit the ACME Labs Java page for up-to-date versions of this and other
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* fine Java utilities: http://www.acme.com/java/
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*/
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"use strict";
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/*jslint white: false, bitwise: false, plusplus: false */
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function DES(passwd) {
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// Tables, permutations, S-boxes, etc.
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var PC2 = [13,16,10,23, 0, 4, 2,27,14, 5,20, 9,22,18,11, 3,
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25, 7,15, 6,26,19,12, 1,40,51,30,36,46,54,29,39,
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50,44,32,47,43,48,38,55,33,52,45,41,49,35,28,31 ],
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totrot = [ 1, 2, 4, 6, 8,10,12,14,15,17,19,21,23,25,27,28],
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z = 0x0, a,b,c,d,e,f, SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,
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keys = [];
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a=1<<16; b=1<<24; c=a|b; d=1<<2; e=1<<10; f=d|e;
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SP1 = [c|e,z|z,a|z,c|f,c|d,a|f,z|d,a|z,z|e,c|e,c|f,z|e,b|f,c|d,b|z,z|d,
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z|f,b|e,b|e,a|e,a|e,c|z,c|z,b|f,a|d,b|d,b|d,a|d,z|z,z|f,a|f,b|z,
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a|z,c|f,z|d,c|z,c|e,b|z,b|z,z|e,c|d,a|z,a|e,b|d,z|e,z|d,b|f,a|f,
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c|f,a|d,c|z,b|f,b|d,z|f,a|f,c|e,z|f,b|e,b|e,z|z,a|d,a|e,z|z,c|d];
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a=1<<20; b=1<<31; c=a|b; d=1<<5; e=1<<15; f=d|e;
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SP2 = [c|f,b|e,z|e,a|f,a|z,z|d,c|d,b|f,b|d,c|f,c|e,b|z,b|e,a|z,z|d,c|d,
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a|e,a|d,b|f,z|z,b|z,z|e,a|f,c|z,a|d,b|d,z|z,a|e,z|f,c|e,c|z,z|f,
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z|z,a|f,c|d,a|z,b|f,c|z,c|e,z|e,c|z,b|e,z|d,c|f,a|f,z|d,z|e,b|z,
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z|f,c|e,a|z,b|d,a|d,b|f,b|d,a|d,a|e,z|z,b|e,z|f,b|z,c|d,c|f,a|e];
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a=1<<17; b=1<<27; c=a|b; d=1<<3; e=1<<9; f=d|e;
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SP3 = [z|f,c|e,z|z,c|d,b|e,z|z,a|f,b|e,a|d,b|d,b|d,a|z,c|f,a|d,c|z,z|f,
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b|z,z|d,c|e,z|e,a|e,c|z,c|d,a|f,b|f,a|e,a|z,b|f,z|d,c|f,z|e,b|z,
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c|e,b|z,a|d,z|f,a|z,c|e,b|e,z|z,z|e,a|d,c|f,b|e,b|d,z|e,z|z,c|d,
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b|f,a|z,b|z,c|f,z|d,a|f,a|e,b|d,c|z,b|f,z|f,c|z,a|f,z|d,c|d,a|e];
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a=1<<13; b=1<<23; c=a|b; d=1<<0; e=1<<7; f=d|e;
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SP4 = [c|d,a|f,a|f,z|e,c|e,b|f,b|d,a|d,z|z,c|z,c|z,c|f,z|f,z|z,b|e,b|d,
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z|d,a|z,b|z,c|d,z|e,b|z,a|d,a|e,b|f,z|d,a|e,b|e,a|z,c|e,c|f,z|f,
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b|e,b|d,c|z,c|f,z|f,z|z,z|z,c|z,a|e,b|e,b|f,z|d,c|d,a|f,a|f,z|e,
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c|f,z|f,z|d,a|z,b|d,a|d,c|e,b|f,a|d,a|e,b|z,c|d,z|e,b|z,a|z,c|e];
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a=1<<25; b=1<<30; c=a|b; d=1<<8; e=1<<19; f=d|e;
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SP5 = [z|d,a|f,a|e,c|d,z|e,z|d,b|z,a|e,b|f,z|e,a|d,b|f,c|d,c|e,z|f,b|z,
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a|z,b|e,b|e,z|z,b|d,c|f,c|f,a|d,c|e,b|d,z|z,c|z,a|f,a|z,c|z,z|f,
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z|e,c|d,z|d,a|z,b|z,a|e,c|d,b|f,a|d,b|z,c|e,a|f,b|f,z|d,a|z,c|e,
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c|f,z|f,c|z,c|f,a|e,z|z,b|e,c|z,z|f,a|d,b|d,z|e,z|z,b|e,a|f,b|d];
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a=1<<22; b=1<<29; c=a|b; d=1<<4; e=1<<14; f=d|e;
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SP6 = [b|d,c|z,z|e,c|f,c|z,z|d,c|f,a|z,b|e,a|f,a|z,b|d,a|d,b|e,b|z,z|f,
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z|z,a|d,b|f,z|e,a|e,b|f,z|d,c|d,c|d,z|z,a|f,c|e,z|f,a|e,c|e,b|z,
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b|e,z|d,c|d,a|e,c|f,a|z,z|f,b|d,a|z,b|e,b|z,z|f,b|d,c|f,a|e,c|z,
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a|f,c|e,z|z,c|d,z|d,z|e,c|z,a|f,z|e,a|d,b|f,z|z,c|e,b|z,a|d,b|f];
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a=1<<21; b=1<<26; c=a|b; d=1<<1; e=1<<11; f=d|e;
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SP7 = [a|z,c|d,b|f,z|z,z|e,b|f,a|f,c|e,c|f,a|z,z|z,b|d,z|d,b|z,c|d,z|f,
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b|e,a|f,a|d,b|e,b|d,c|z,c|e,a|d,c|z,z|e,z|f,c|f,a|e,z|d,b|z,a|e,
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b|z,a|e,a|z,b|f,b|f,c|d,c|d,z|d,a|d,b|z,b|e,a|z,c|e,z|f,a|f,c|e,
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z|f,b|d,c|f,c|z,a|e,z|z,z|d,c|f,z|z,a|f,c|z,z|e,b|d,b|e,z|e,a|d];
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a=1<<18; b=1<<28; c=a|b; d=1<<6; e=1<<12; f=d|e;
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SP8 = [b|f,z|e,a|z,c|f,b|z,b|f,z|d,b|z,a|d,c|z,c|f,a|e,c|e,a|f,z|e,z|d,
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c|z,b|d,b|e,z|f,a|e,a|d,c|d,c|e,z|f,z|z,z|z,c|d,b|d,b|e,a|f,a|z,
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a|f,a|z,c|e,z|e,z|d,c|d,z|e,a|f,b|e,z|d,b|d,c|z,c|d,b|z,a|z,b|f,
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z|z,c|f,a|d,b|d,c|z,b|e,b|f,z|z,c|f,a|e,a|e,z|f,z|f,a|d,b|z,c|e];
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// Set the key.
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function setKeys(keyBlock) {
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var i, j, l, m, n, o, pc1m = [], pcr = [], kn = [],
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raw0, raw1, rawi, KnLi;
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for (j = 0, l = 56; j < 56; ++j, l-=8) {
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l += l<-5 ? 65 : l<-3 ? 31 : l<-1 ? 63 : l===27 ? 35 : 0; // PC1
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m = l & 0x7;
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pc1m[j] = ((keyBlock[l >>> 3] & (1<<m)) !== 0) ? 1: 0;
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}
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for (i = 0; i < 16; ++i) {
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m = i << 1;
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n = m + 1;
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kn[m] = kn[n] = 0;
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for (o=28; o<59; o+=28) {
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for (j = o-28; j < o; ++j) {
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l = j + totrot[i];
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if (l < o) {
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pcr[j] = pc1m[l];
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} else {
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pcr[j] = pc1m[l - 28];
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}
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}
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}
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for (j = 0; j < 24; ++j) {
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if (pcr[PC2[j]] !== 0) {
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kn[m] |= 1<<(23-j);
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}
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if (pcr[PC2[j + 24]] !== 0) {
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kn[n] |= 1<<(23-j);
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}
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}
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}
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// cookey
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for (i = 0, rawi = 0, KnLi = 0; i < 16; ++i) {
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raw0 = kn[rawi++];
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raw1 = kn[rawi++];
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keys[KnLi] = (raw0 & 0x00fc0000) << 6;
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keys[KnLi] |= (raw0 & 0x00000fc0) << 10;
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keys[KnLi] |= (raw1 & 0x00fc0000) >>> 10;
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keys[KnLi] |= (raw1 & 0x00000fc0) >>> 6;
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++KnLi;
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keys[KnLi] = (raw0 & 0x0003f000) << 12;
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keys[KnLi] |= (raw0 & 0x0000003f) << 16;
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keys[KnLi] |= (raw1 & 0x0003f000) >>> 4;
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keys[KnLi] |= (raw1 & 0x0000003f);
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++KnLi;
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}
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}
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// Encrypt 8 bytes of text
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function enc8(text) {
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var i = 0, b = text.slice(), fval, keysi = 0,
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l, r, x; // left, right, accumulator
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// Squash 8 bytes to 2 ints
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l = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++];
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r = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++];
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x = ((l >>> 4) ^ r) & 0x0f0f0f0f;
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r ^= x;
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l ^= (x << 4);
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x = ((l >>> 16) ^ r) & 0x0000ffff;
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r ^= x;
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l ^= (x << 16);
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x = ((r >>> 2) ^ l) & 0x33333333;
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l ^= x;
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r ^= (x << 2);
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x = ((r >>> 8) ^ l) & 0x00ff00ff;
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l ^= x;
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r ^= (x << 8);
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r = (r << 1) | ((r >>> 31) & 1);
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x = (l ^ r) & 0xaaaaaaaa;
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l ^= x;
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r ^= x;
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l = (l << 1) | ((l >>> 31) & 1);
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for (i = 0; i < 8; ++i) {
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x = (r << 28) | (r >>> 4);
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x ^= keys[keysi++];
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fval = SP7[x & 0x3f];
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fval |= SP5[(x >>> 8) & 0x3f];
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fval |= SP3[(x >>> 16) & 0x3f];
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fval |= SP1[(x >>> 24) & 0x3f];
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x = r ^ keys[keysi++];
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fval |= SP8[x & 0x3f];
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fval |= SP6[(x >>> 8) & 0x3f];
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fval |= SP4[(x >>> 16) & 0x3f];
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fval |= SP2[(x >>> 24) & 0x3f];
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l ^= fval;
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x = (l << 28) | (l >>> 4);
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x ^= keys[keysi++];
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fval = SP7[x & 0x3f];
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fval |= SP5[(x >>> 8) & 0x3f];
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fval |= SP3[(x >>> 16) & 0x3f];
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fval |= SP1[(x >>> 24) & 0x3f];
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x = l ^ keys[keysi++];
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fval |= SP8[x & 0x0000003f];
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fval |= SP6[(x >>> 8) & 0x3f];
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fval |= SP4[(x >>> 16) & 0x3f];
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fval |= SP2[(x >>> 24) & 0x3f];
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r ^= fval;
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}
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r = (r << 31) | (r >>> 1);
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x = (l ^ r) & 0xaaaaaaaa;
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l ^= x;
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r ^= x;
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l = (l << 31) | (l >>> 1);
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x = ((l >>> 8) ^ r) & 0x00ff00ff;
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r ^= x;
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l ^= (x << 8);
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x = ((l >>> 2) ^ r) & 0x33333333;
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r ^= x;
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l ^= (x << 2);
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x = ((r >>> 16) ^ l) & 0x0000ffff;
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l ^= x;
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r ^= (x << 16);
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x = ((r >>> 4) ^ l) & 0x0f0f0f0f;
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l ^= x;
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r ^= (x << 4);
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// Spread ints to bytes
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x = [r, l];
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for (i = 0; i < 8; i++) {
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b[i] = (x[i>>>2] >>> (8*(3 - (i%4)))) % 256;
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if (b[i] < 0) { b[i] += 256; } // unsigned
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}
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return b;
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}
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// Encrypt 16 bytes of text using passwd as key
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function encrypt(t) {
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return enc8(t.slice(0,8)).concat(enc8(t.slice(8,16)));
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}
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setKeys(passwd); // Setup keys
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return {'encrypt': encrypt}; // Public interface
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} // function DES
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