| /* |
| * 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 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 <[email protected]>, 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 <[email protected]>. 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/ |
| */ |
| |
| /* jslint white: false */ |
| |
| function DES(passwd) { |
| "use strict"; |
| |
| // Tables, permutations, S-boxes, etc. |
| // jshint -W013 |
| var 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 ], |
| totrot = [ 1, 2, 4, 6, 8,10,12,14,15,17,19,21,23,25,27,28], |
| z = 0x0, a,b,c,d,e,f, SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8, |
| keys = []; |
| |
| // jshint -W015 |
| a=1<<16; b=1<<24; c=a|b; d=1<<2; e=1<<10; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<20; b=1<<31; c=a|b; d=1<<5; e=1<<15; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<17; b=1<<27; c=a|b; d=1<<3; e=1<<9; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<13; b=1<<23; c=a|b; d=1<<0; e=1<<7; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<25; b=1<<30; c=a|b; d=1<<8; e=1<<19; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<22; b=1<<29; c=a|b; d=1<<4; e=1<<14; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<21; b=1<<26; c=a|b; d=1<<1; e=1<<11; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| a=1<<18; b=1<<28; c=a|b; d=1<<6; e=1<<12; f=d|e; |
| 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, |
| 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, |
| 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, |
| 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]; |
| // jshint +W013,+W015 |
| |
| // Set the key. |
| function setKeys(keyBlock) { |
| var i, j, l, m, n, o, pc1m = [], pcr = [], kn = [], |
| raw0, raw1, rawi, KnLi; |
| |
| for (j = 0, l = 56; j < 56; ++j, l -= 8) { |
| l += l < -5 ? 65 : l < -3 ? 31 : l < -1 ? 63 : l === 27 ? 35 : 0; // PC1 |
| m = l & 0x7; |
| pc1m[j] = ((keyBlock[l >>> 3] & (1<<m)) !== 0) ? 1: 0; |
| } |
| |
| for (i = 0; i < 16; ++i) { |
| m = i << 1; |
| n = m + 1; |
| kn[m] = kn[n] = 0; |
| for (o = 28; o < 59; o += 28) { |
| for (j = o - 28; j < o; ++j) { |
| l = j + totrot[i]; |
| if (l < o) { |
| pcr[j] = pc1m[l]; |
| } else { |
| pcr[j] = pc1m[l - 28]; |
| } |
| } |
| } |
| for (j = 0; j < 24; ++j) { |
| if (pcr[PC2[j]] !== 0) { |
| kn[m] |= 1 << (23 - j); |
| } |
| if (pcr[PC2[j + 24]] !== 0) { |
| kn[n] |= 1 << (23 - j); |
| } |
| } |
| } |
| |
| // cookey |
| for (i = 0, rawi = 0, KnLi = 0; i < 16; ++i) { |
| raw0 = kn[rawi++]; |
| raw1 = kn[rawi++]; |
| keys[KnLi] = (raw0 & 0x00fc0000) << 6; |
| keys[KnLi] |= (raw0 & 0x00000fc0) << 10; |
| keys[KnLi] |= (raw1 & 0x00fc0000) >>> 10; |
| keys[KnLi] |= (raw1 & 0x00000fc0) >>> 6; |
| ++KnLi; |
| keys[KnLi] = (raw0 & 0x0003f000) << 12; |
| keys[KnLi] |= (raw0 & 0x0000003f) << 16; |
| keys[KnLi] |= (raw1 & 0x0003f000) >>> 4; |
| keys[KnLi] |= (raw1 & 0x0000003f); |
| ++KnLi; |
| } |
| } |
| |
| // Encrypt 8 bytes of text |
| function enc8(text) { |
| var i = 0, b = text.slice(), fval, keysi = 0, |
| l, r, x; // left, right, accumulator |
| |
| // Squash 8 bytes to 2 ints |
| l = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++]; |
| r = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++]; |
| |
| x = ((l >>> 4) ^ r) & 0x0f0f0f0f; |
| r ^= x; |
| l ^= (x << 4); |
| x = ((l >>> 16) ^ r) & 0x0000ffff; |
| r ^= x; |
| l ^= (x << 16); |
| x = ((r >>> 2) ^ l) & 0x33333333; |
| l ^= x; |
| r ^= (x << 2); |
| x = ((r >>> 8) ^ l) & 0x00ff00ff; |
| l ^= x; |
| r ^= (x << 8); |
| r = (r << 1) | ((r >>> 31) & 1); |
| x = (l ^ r) & 0xaaaaaaaa; |
| l ^= x; |
| r ^= x; |
| l = (l << 1) | ((l >>> 31) & 1); |
| |
| for (i = 0; i < 8; ++i) { |
| x = (r << 28) | (r >>> 4); |
| x ^= keys[keysi++]; |
| fval = SP7[x & 0x3f]; |
| fval |= SP5[(x >>> 8) & 0x3f]; |
| fval |= SP3[(x >>> 16) & 0x3f]; |
| fval |= SP1[(x >>> 24) & 0x3f]; |
| x = r ^ keys[keysi++]; |
| fval |= SP8[x & 0x3f]; |
| fval |= SP6[(x >>> 8) & 0x3f]; |
| fval |= SP4[(x >>> 16) & 0x3f]; |
| fval |= SP2[(x >>> 24) & 0x3f]; |
| l ^= fval; |
| x = (l << 28) | (l >>> 4); |
| x ^= keys[keysi++]; |
| fval = SP7[x & 0x3f]; |
| fval |= SP5[(x >>> 8) & 0x3f]; |
| fval |= SP3[(x >>> 16) & 0x3f]; |
| fval |= SP1[(x >>> 24) & 0x3f]; |
| x = l ^ keys[keysi++]; |
| fval |= SP8[x & 0x0000003f]; |
| fval |= SP6[(x >>> 8) & 0x3f]; |
| fval |= SP4[(x >>> 16) & 0x3f]; |
| fval |= SP2[(x >>> 24) & 0x3f]; |
| r ^= fval; |
| } |
| |
| r = (r << 31) | (r >>> 1); |
| x = (l ^ r) & 0xaaaaaaaa; |
| l ^= x; |
| r ^= x; |
| l = (l << 31) | (l >>> 1); |
| x = ((l >>> 8) ^ r) & 0x00ff00ff; |
| r ^= x; |
| l ^= (x << 8); |
| x = ((l >>> 2) ^ r) & 0x33333333; |
| r ^= x; |
| l ^= (x << 2); |
| x = ((r >>> 16) ^ l) & 0x0000ffff; |
| l ^= x; |
| r ^= (x << 16); |
| x = ((r >>> 4) ^ l) & 0x0f0f0f0f; |
| l ^= x; |
| r ^= (x << 4); |
| |
| // Spread ints to bytes |
| x = [r, l]; |
| for (i = 0; i < 8; i++) { |
| b[i] = (x[i>>>2] >>> (8 * (3 - (i % 4)))) % 256; |
| if (b[i] < 0) { b[i] += 256; } // unsigned |
| } |
| return b; |
| } |
| |
| // Encrypt 16 bytes of text using passwd as key |
| function encrypt(t) { |
| return enc8(t.slice(0, 8)).concat(enc8(t.slice(8, 16))); |
| } |
| |
| setKeys(passwd); // Setup keys |
| return {'encrypt': encrypt}; // Public interface |
| |
| } // function DES |
