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283 lines
13 KiB
JavaScript
283 lines
13 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = DES;
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/*
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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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function DES(passwd) {
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"use strict";
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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, 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],
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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,
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a,
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b,
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c,
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d,
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e,
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f,
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SP1,
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SP2,
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SP3,
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SP4,
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SP5,
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SP6,
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SP7,
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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, 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];
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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, 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];
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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, 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];
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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, 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];
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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, 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];
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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, 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];
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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, 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];
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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, 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];
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// Set the key.
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function setKeys(keyBlock) {
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var i,
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j,
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l,
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m,
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n,
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o,
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pc1m = [],
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pcr = [],
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kn = [],
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raw0,
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raw1,
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rawi,
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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,
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b = text.slice(),
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fval,
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keysi = 0,
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l,
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r,
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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;
|
||
|
|
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
|