1 /* 2 * Ported from Flashlight VNC ActionScript implementation: 3 * http://www.wizhelp.com/flashlight-vnc/ 4 * 5 * Full attribution follows: 6 * 7 * ------------------------------------------------------------------------- 8 * 9 * This DES class has been extracted from package Acme.Crypto for use in VNC. 10 * The unnecessary odd parity code has been removed. 11 * 12 * These changes are: 13 * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. 14 * 15 * This software is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 20 * DesCipher - the DES encryption method 21 * 22 * The meat of this code is by Dave Zimmerman <dzimm (at) widget.com>, and is: 23 * 24 * Copyright (c) 1996 Widget Workshop, Inc. All Rights Reserved. 25 * 26 * Permission to use, copy, modify, and distribute this software 27 * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and 28 * without fee is hereby granted, provided that this copyright notice is kept 29 * intact. 30 * 31 * WIDGET WORKSHOP MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY 32 * OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 33 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 34 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. WIDGET WORKSHOP SHALL NOT BE LIABLE 35 * FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR 36 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. 37 * 38 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE 39 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE 40 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT 41 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE 42 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE 43 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE 44 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). WIDGET WORKSHOP 45 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR 46 * HIGH RISK ACTIVITIES. 47 * 48 * 49 * The rest is: 50 * 51 * Copyright (C) 1996 by Jef Poskanzer <jef (at) acme.com>. All rights reserved. 52 * 53 * Redistribution and use in source and binary forms, with or without 54 * modification, are permitted provided that the following conditions 55 * are met: 56 * 1. Redistributions of source code must retain the above copyright 57 * notice, this list of conditions and the following disclaimer. 58 * 2. Redistributions in binary form must reproduce the above copyright 59 * notice, this list of conditions and the following disclaimer in the 60 * documentation and/or other materials provided with the distribution. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * Visit the ACME Labs Java page for up-to-date versions of this and other 75 * fine Java utilities: http://www.acme.com/java/ 76 */ 77 78 "use strict"; 79 /*jslint white: false, bitwise: false, plusplus: false */ 80 81 function DES(passwd) { 82 83 // Tables, permutations, S-boxes, etc. 84 var PC2 = [13,16,10,23, 0, 4, 2,27,14, 5,20, 9,22,18,11, 3, 85 25, 7,15, 6,26,19,12, 1,40,51,30,36,46,54,29,39, 86 50,44,32,47,43,48,38,55,33,52,45,41,49,35,28,31 ], 87 totrot = [ 1, 2, 4, 6, 8,10,12,14,15,17,19,21,23,25,27,28], 88 z = 0x0, a,b,c,d,e,f, SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8, 89 keys = []; 90 91 a=1<<16; b=1<<24; c=a|b; d=1<<2; e=1<<10; f=d|e; 92 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, 93 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, 94 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, 95 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]; 96 a=1<<20; b=1<<31; c=a|b; d=1<<5; e=1<<15; f=d|e; 97 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, 98 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, 99 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, 100 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]; 101 a=1<<17; b=1<<27; c=a|b; d=1<<3; e=1<<9; f=d|e; 102 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, 103 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, 104 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, 105 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]; 106 a=1<<13; b=1<<23; c=a|b; d=1<<0; e=1<<7; f=d|e; 107 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, 108 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, 109 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, 110 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]; 111 a=1<<25; b=1<<30; c=a|b; d=1<<8; e=1<<19; f=d|e; 112 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, 113 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, 114 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, 115 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]; 116 a=1<<22; b=1<<29; c=a|b; d=1<<4; e=1<<14; f=d|e; 117 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, 118 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, 119 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, 120 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]; 121 a=1<<21; b=1<<26; c=a|b; d=1<<1; e=1<<11; f=d|e; 122 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, 123 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, 124 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, 125 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]; 126 a=1<<18; b=1<<28; c=a|b; d=1<<6; e=1<<12; f=d|e; 127 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, 128 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, 129 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, 130 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]; 131 132 // Set the key. 133 function setKeys(keyBlock) { 134 var i, j, l, m, n, o, pc1m = [], pcr = [], kn = [], 135 raw0, raw1, rawi, KnLi; 136 137 for (j = 0, l = 56; j < 56; ++j, l-=8) { 138 l += l<-5 ? 65 : l<-3 ? 31 : l<-1 ? 63 : l===27 ? 35 : 0; // PC1 139 m = l & 0x7; 140 pc1m[j] = ((keyBlock[l >>> 3] & (1<<m)) !== 0) ? 1: 0; 141 } 142 143 for (i = 0; i < 16; ++i) { 144 m = i << 1; 145 n = m + 1; 146 kn[m] = kn[n] = 0; 147 for (o=28; o<59; o+=28) { 148 for (j = o-28; j < o; ++j) { 149 l = j + totrot[i]; 150 if (l < o) { 151 pcr[j] = pc1m[l]; 152 } else { 153 pcr[j] = pc1m[l - 28]; 154 } 155 } 156 } 157 for (j = 0; j < 24; ++j) { 158 if (pcr[PC2[j]] !== 0) { 159 kn[m] |= 1<<(23-j); 160 } 161 if (pcr[PC2[j + 24]] !== 0) { 162 kn[n] |= 1<<(23-j); 163 } 164 } 165 } 166 167 // cookey 168 for (i = 0, rawi = 0, KnLi = 0; i < 16; ++i) { 169 raw0 = kn[rawi++]; 170 raw1 = kn[rawi++]; 171 keys[KnLi] = (raw0 & 0x00fc0000) << 6; 172 keys[KnLi] |= (raw0 & 0x00000fc0) << 10; 173 keys[KnLi] |= (raw1 & 0x00fc0000) >>> 10; 174 keys[KnLi] |= (raw1 & 0x00000fc0) >>> 6; 175 ++KnLi; 176 keys[KnLi] = (raw0 & 0x0003f000) << 12; 177 keys[KnLi] |= (raw0 & 0x0000003f) << 16; 178 keys[KnLi] |= (raw1 & 0x0003f000) >>> 4; 179 keys[KnLi] |= (raw1 & 0x0000003f); 180 ++KnLi; 181 } 182 } 183 184 // Encrypt 8 bytes of text 185 function enc8(text) { 186 var i = 0, b = text.slice(), fval, keysi = 0, 187 l, r, x; // left, right, accumulator 188 189 // Squash 8 bytes to 2 ints 190 l = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++]; 191 r = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++]; 192 193 x = ((l >>> 4) ^ r) & 0x0f0f0f0f; 194 r ^= x; 195 l ^= (x << 4); 196 x = ((l >>> 16) ^ r) & 0x0000ffff; 197 r ^= x; 198 l ^= (x << 16); 199 x = ((r >>> 2) ^ l) & 0x33333333; 200 l ^= x; 201 r ^= (x << 2); 202 x = ((r >>> 8) ^ l) & 0x00ff00ff; 203 l ^= x; 204 r ^= (x << 8); 205 r = (r << 1) | ((r >>> 31) & 1); 206 x = (l ^ r) & 0xaaaaaaaa; 207 l ^= x; 208 r ^= x; 209 l = (l << 1) | ((l >>> 31) & 1); 210 211 for (i = 0; i < 8; ++i) { 212 x = (r << 28) | (r >>> 4); 213 x ^= keys[keysi++]; 214 fval = SP7[x & 0x3f]; 215 fval |= SP5[(x >>> 8) & 0x3f]; 216 fval |= SP3[(x >>> 16) & 0x3f]; 217 fval |= SP1[(x >>> 24) & 0x3f]; 218 x = r ^ keys[keysi++]; 219 fval |= SP8[x & 0x3f]; 220 fval |= SP6[(x >>> 8) & 0x3f]; 221 fval |= SP4[(x >>> 16) & 0x3f]; 222 fval |= SP2[(x >>> 24) & 0x3f]; 223 l ^= fval; 224 x = (l << 28) | (l >>> 4); 225 x ^= keys[keysi++]; 226 fval = SP7[x & 0x3f]; 227 fval |= SP5[(x >>> 8) & 0x3f]; 228 fval |= SP3[(x >>> 16) & 0x3f]; 229 fval |= SP1[(x >>> 24) & 0x3f]; 230 x = l ^ keys[keysi++]; 231 fval |= SP8[x & 0x0000003f]; 232 fval |= SP6[(x >>> 8) & 0x3f]; 233 fval |= SP4[(x >>> 16) & 0x3f]; 234 fval |= SP2[(x >>> 24) & 0x3f]; 235 r ^= fval; 236 } 237 238 r = (r << 31) | (r >>> 1); 239 x = (l ^ r) & 0xaaaaaaaa; 240 l ^= x; 241 r ^= x; 242 l = (l << 31) | (l >>> 1); 243 x = ((l >>> 8) ^ r) & 0x00ff00ff; 244 r ^= x; 245 l ^= (x << 8); 246 x = ((l >>> 2) ^ r) & 0x33333333; 247 r ^= x; 248 l ^= (x << 2); 249 x = ((r >>> 16) ^ l) & 0x0000ffff; 250 l ^= x; 251 r ^= (x << 16); 252 x = ((r >>> 4) ^ l) & 0x0f0f0f0f; 253 l ^= x; 254 r ^= (x << 4); 255 256 // Spread ints to bytes 257 x = [r, l]; 258 for (i = 0; i < 8; i++) { 259 b[i] = (x[i>>>2] >>> (8*(3 - (i%4)))) % 256; 260 if (b[i] < 0) { b[i] += 256; } // unsigned 261 } 262 return b; 263 } 264 265 // Encrypt 16 bytes of text using passwd as key 266 function encrypt(t) { 267 return enc8(t.slice(0,8)).concat(enc8(t.slice(8,16))); 268 } 269 270 setKeys(passwd); // Setup keys 271 return {'encrypt': encrypt}; // Public interface 272 273 } // function DES 274
