/* * 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 <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 */ function DES(passwd) { // Tables, permutations, S-boxes, etc. 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 = []; 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]; // 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