index.js

/**
Modified to generate encrypted passwords for TightVNC server
Carlos Galveias.
*/

/*
  d3des.c translated to JavaScript
  Andrey Sidorov <andrey.sidorov@gmail.com>
*/

/* D3DES (V5.09) -
 *
 * A portable, public domain, version of the Data Encryption Standard.
 *
 * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
 * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
 * code;  Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
 * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
 * for humouring me on.
 *
 * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
 * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
 */

/* D2_DES and D3_DES code removed, by Constantin Kaplinsky */

var KnL = new Array(32);
var EN0 = 0;
var DE1 = 1;

// ThightVNC Challenge key is a predefined key. Taken from VncpassCrypt.cpp from tightVNC Source
const challenge = [23, 82, 107, 6, 35, 78, 88, 7];

/* The following array is reversed for VNC compatibility,
   by Constantin Kaplinsky */

var bytebit = [01, 02, 04, 010, 020, 040, 0100, 0200];

var bigbyte = [
    0x800000, 0x400000, 0x200000, 0x100000,
    0x80000, 0x40000, 0x20000, 0x10000,
    0x8000, 0x4000, 0x2000, 0x1000,
    0x800, 0x400, 0x200, 0x100,
    0x80, 0x40, 0x20, 0x10,
    0x8, 0x4, 0x2, 0x1
];

/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */

var pc1 = [
    56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
    9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
    62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
    13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3
];

var totrot = [
    1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28
];

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
];

function deskey(key, edf) {
    var i, j, l, m, n;
    var pc1m = Buffer.alloc(56);
    var pcr = Buffer.alloc(56);
    var kn = new Array(32);

    for (j = 0; j < 56; j++) {
        l = pc1[j];
        m = l & 07;
        pc1m[j] = (key[l >>> 3] & bytebit[m]) ? 1 : 0;
    }

    for (i = 0; i < 16; i++) {

        if (edf == DE1) m = (15 - i) << 1;
        else m = i << 1;


        n = m + 1;
        kn[m] = kn[n] = 0;
        for (j = 0; j < 28; j++) {
            l = j + totrot[i];
            if (l < 28) pcr[j] = pc1m[l];
            else pcr[j] = pc1m[l - 28];
        }
        for (j = 28; j < 56; j++) {
            l = j + totrot[i];
            if (l < 56) pcr[j] = pc1m[l];
            else pcr[j] = pc1m[l - 28];
        }
        for (j = 0; j < 24; j++) {
            if (pcr[pc2[j]]) kn[m] |= bigbyte[j];
            if (pcr[pc2[j + 24]]) kn[n] |= bigbyte[j];
        }
    }
    cookey(kn);
    return;
}


function cookey(_raw1) {
    var raw1 = 0;
    var cook, raw0;
    var i;

    cook = 0;
    for (i = 0; i < 16; i++, raw1++) {
        raw0 = raw1++;
        KnL[cook] = (_raw1[raw0] & 0x00fc0000) << 6;
        KnL[cook] |= (_raw1[raw0] & 0x00000fc0) << 10;
        KnL[cook] |= (_raw1[raw1] & 0x00fc0000) >>> 10;
        KnL[cook++] |= (_raw1[raw1] & 0x00000fc0) >>> 6;
        KnL[cook] = (_raw1[raw0] & 0x0003f000) << 12;
        KnL[cook] |= (_raw1[raw0] & 0x0000003f) << 16;
        KnL[cook] |= (_raw1[raw1] & 0x0003f000) >>> 4;
        KnL[cook++] |= (_raw1[raw1] & 0x0000003f);
    }
    return;
}

function des(inblock, outblock) {
    var work = new Array(2);
    scrunch(inblock, work);
    desfunc(work, KnL);
    unscrun(work, outblock);
    return;
}

function scrunch(outof, into) {
    into[0] = 0;
    into[1] = 0;

    into[0] = (outof[0] & 0xff) << 24;
    into[0] |= (outof[1] & 0xff) << 16;
    into[0] |= (outof[2] & 0xff) << 8;
    into[0] |= (outof[3] & 0xff);
    into[1] = (outof[4] & 0xff) << 24;
    into[1] |= (outof[5] & 0xff) << 16;
    into[1] |= (outof[6] & 0xff) << 8;
    into[1] |= (outof[7] & 0xff);

    return;
}

function unscrun(outof, into) {
    into[0] = (outof[0] >>> 24) & 0xff;
    into[1] = (outof[0] >>> 16) & 0xff;
    into[2] = (outof[0] >>> 8) & 0xff;
    into[3] = outof[0] & 0xff;
    into[4] = (outof[1] >>> 24) & 0xff;
    into[5] = (outof[1] >>> 16) & 0xff;
    into[6] = (outof[1] >>> 8) & 0xff;
    into[7] = outof[1] & 0xff;
    return;
}

var SP1 = [
    0x01010400, 0x00000000, 0x00010000, 0x01010404,
    0x01010004, 0x00010404, 0x00000004, 0x00010000,
    0x00000400, 0x01010400, 0x01010404, 0x00000400,
    0x01000404, 0x01010004, 0x01000000, 0x00000004,
    0x00000404, 0x01000400, 0x01000400, 0x00010400,
    0x00010400, 0x01010000, 0x01010000, 0x01000404,
    0x00010004, 0x01000004, 0x01000004, 0x00010004,
    0x00000000, 0x00000404, 0x00010404, 0x01000000,
    0x00010000, 0x01010404, 0x00000004, 0x01010000,
    0x01010400, 0x01000000, 0x01000000, 0x00000400,
    0x01010004, 0x00010000, 0x00010400, 0x01000004,
    0x00000400, 0x00000004, 0x01000404, 0x00010404,
    0x01010404, 0x00010004, 0x01010000, 0x01000404,
    0x01000004, 0x00000404, 0x00010404, 0x01010400,
    0x00000404, 0x01000400, 0x01000400, 0x00000000,
    0x00010004, 0x00010400, 0x00000000, 0x01010004
];

var SP2 = [
    0x80108020, 0x80008000, 0x00008000, 0x00108020,
    0x00100000, 0x00000020, 0x80100020, 0x80008020,
    0x80000020, 0x80108020, 0x80108000, 0x80000000,
    0x80008000, 0x00100000, 0x00000020, 0x80100020,
    0x00108000, 0x00100020, 0x80008020, 0x00000000,
    0x80000000, 0x00008000, 0x00108020, 0x80100000,
    0x00100020, 0x80000020, 0x00000000, 0x00108000,
    0x00008020, 0x80108000, 0x80100000, 0x00008020,
    0x00000000, 0x00108020, 0x80100020, 0x00100000,
    0x80008020, 0x80100000, 0x80108000, 0x00008000,
    0x80100000, 0x80008000, 0x00000020, 0x80108020,
    0x00108020, 0x00000020, 0x00008000, 0x80000000,
    0x00008020, 0x80108000, 0x00100000, 0x80000020,
    0x00100020, 0x80008020, 0x80000020, 0x00100020,
    0x00108000, 0x00000000, 0x80008000, 0x00008020,
    0x80000000, 0x80100020, 0x80108020, 0x00108000
];

var SP3 = [
    0x00000208, 0x08020200, 0x00000000, 0x08020008,
    0x08000200, 0x00000000, 0x00020208, 0x08000200,
    0x00020008, 0x08000008, 0x08000008, 0x00020000,
    0x08020208, 0x00020008, 0x08020000, 0x00000208,
    0x08000000, 0x00000008, 0x08020200, 0x00000200,
    0x00020200, 0x08020000, 0x08020008, 0x00020208,
    0x08000208, 0x00020200, 0x00020000, 0x08000208,
    0x00000008, 0x08020208, 0x00000200, 0x08000000,
    0x08020200, 0x08000000, 0x00020008, 0x00000208,
    0x00020000, 0x08020200, 0x08000200, 0x00000000,
    0x00000200, 0x00020008, 0x08020208, 0x08000200,
    0x08000008, 0x00000200, 0x00000000, 0x08020008,
    0x08000208, 0x00020000, 0x08000000, 0x08020208,
    0x00000008, 0x00020208, 0x00020200, 0x08000008,
    0x08020000, 0x08000208, 0x00000208, 0x08020000,
    0x00020208, 0x00000008, 0x08020008, 0x00020200
];

var SP4 = [
    0x00802001, 0x00002081, 0x00002081, 0x00000080,
    0x00802080, 0x00800081, 0x00800001, 0x00002001,
    0x00000000, 0x00802000, 0x00802000, 0x00802081,
    0x00000081, 0x00000000, 0x00800080, 0x00800001,
    0x00000001, 0x00002000, 0x00800000, 0x00802001,
    0x00000080, 0x00800000, 0x00002001, 0x00002080,
    0x00800081, 0x00000001, 0x00002080, 0x00800080,
    0x00002000, 0x00802080, 0x00802081, 0x00000081,
    0x00800080, 0x00800001, 0x00802000, 0x00802081,
    0x00000081, 0x00000000, 0x00000000, 0x00802000,
    0x00002080, 0x00800080, 0x00800081, 0x00000001,
    0x00802001, 0x00002081, 0x00002081, 0x00000080,
    0x00802081, 0x00000081, 0x00000001, 0x00002000,
    0x00800001, 0x00002001, 0x00802080, 0x00800081,
    0x00002001, 0x00002080, 0x00800000, 0x00802001,
    0x00000080, 0x00800000, 0x00002000, 0x00802080
];

var SP5 = [
    0x00000100, 0x02080100, 0x02080000, 0x42000100,
    0x00080000, 0x00000100, 0x40000000, 0x02080000,
    0x40080100, 0x00080000, 0x02000100, 0x40080100,
    0x42000100, 0x42080000, 0x00080100, 0x40000000,
    0x02000000, 0x40080000, 0x40080000, 0x00000000,
    0x40000100, 0x42080100, 0x42080100, 0x02000100,
    0x42080000, 0x40000100, 0x00000000, 0x42000000,
    0x02080100, 0x02000000, 0x42000000, 0x00080100,
    0x00080000, 0x42000100, 0x00000100, 0x02000000,
    0x40000000, 0x02080000, 0x42000100, 0x40080100,
    0x02000100, 0x40000000, 0x42080000, 0x02080100,
    0x40080100, 0x00000100, 0x02000000, 0x42080000,
    0x42080100, 0x00080100, 0x42000000, 0x42080100,
    0x02080000, 0x00000000, 0x40080000, 0x42000000,
    0x00080100, 0x02000100, 0x40000100, 0x00080000,
    0x00000000, 0x40080000, 0x02080100, 0x40000100
];

var SP6 = [
    0x20000010, 0x20400000, 0x00004000, 0x20404010,
    0x20400000, 0x00000010, 0x20404010, 0x00400000,
    0x20004000, 0x00404010, 0x00400000, 0x20000010,
    0x00400010, 0x20004000, 0x20000000, 0x00004010,
    0x00000000, 0x00400010, 0x20004010, 0x00004000,
    0x00404000, 0x20004010, 0x00000010, 0x20400010,
    0x20400010, 0x00000000, 0x00404010, 0x20404000,
    0x00004010, 0x00404000, 0x20404000, 0x20000000,
    0x20004000, 0x00000010, 0x20400010, 0x00404000,
    0x20404010, 0x00400000, 0x00004010, 0x20000010,
    0x00400000, 0x20004000, 0x20000000, 0x00004010,
    0x20000010, 0x20404010, 0x00404000, 0x20400000,
    0x00404010, 0x20404000, 0x00000000, 0x20400010,
    0x00000010, 0x00004000, 0x20400000, 0x00404010,
    0x00004000, 0x00400010, 0x20004010, 0x00000000,
    0x20404000, 0x20000000, 0x00400010, 0x20004010
];

var SP7 = [
    0x00200000, 0x04200002, 0x04000802, 0x00000000,
    0x00000800, 0x04000802, 0x00200802, 0x04200800,
    0x04200802, 0x00200000, 0x00000000, 0x04000002,
    0x00000002, 0x04000000, 0x04200002, 0x00000802,
    0x04000800, 0x00200802, 0x00200002, 0x04000800,
    0x04000002, 0x04200000, 0x04200800, 0x00200002,
    0x04200000, 0x00000800, 0x00000802, 0x04200802,
    0x00200800, 0x00000002, 0x04000000, 0x00200800,
    0x04000000, 0x00200800, 0x00200000, 0x04000802,
    0x04000802, 0x04200002, 0x04200002, 0x00000002,
    0x00200002, 0x04000000, 0x04000800, 0x00200000,
    0x04200800, 0x00000802, 0x00200802, 0x04200800,
    0x00000802, 0x04000002, 0x04200802, 0x04200000,
    0x00200800, 0x00000000, 0x00000002, 0x04200802,
    0x00000000, 0x00200802, 0x04200000, 0x00000800,
    0x04000002, 0x04000800, 0x00000800, 0x00200002
];

var SP8 = [
    0x10001040, 0x00001000, 0x00040000, 0x10041040,
    0x10000000, 0x10001040, 0x00000040, 0x10000000,
    0x00040040, 0x10040000, 0x10041040, 0x00041000,
    0x10041000, 0x00041040, 0x00001000, 0x00000040,
    0x10040000, 0x10000040, 0x10001000, 0x00001040,
    0x00041000, 0x00040040, 0x10040040, 0x10041000,
    0x00001040, 0x00000000, 0x00000000, 0x10040040,
    0x10000040, 0x10001000, 0x00041040, 0x00040000,
    0x00041040, 0x00040000, 0x10041000, 0x00001000,
    0x00000040, 0x10040040, 0x00001000, 0x00041040,
    0x10001000, 0x00000040, 0x10000040, 0x10040000,
    0x10040040, 0x10000000, 0x00040000, 0x10001040,
    0x00000000, 0x10041040, 0x00040040, 0x10000040,
    0x10040000, 0x10001000, 0x10001040, 0x00000000,
    0x10041040, 0x00041000, 0x00041000, 0x00001040,
    0x00001040, 0x00040040, 0x10000000, 0x10041000
];

function desfunc(block, keys) {
    var fval, work, right, leftt;
    var round;

    var keysi = 0;

    leftt = block[0];
    right = block[1];

    work = ((leftt >>> 4) ^ right) & 0x0f0f0f0f;
    right ^= work;
    leftt ^= (work << 4);
    work = ((leftt >>> 16) ^ right) & 0x0000ffff;
    right ^= work;
    leftt ^= (work << 16);
    work = ((right >>> 2) ^ leftt) & 0x33333333;
    leftt ^= work;
    right ^= (work << 2);
    work = ((right >>> 8) ^ leftt) & 0x00ff00ff;
    leftt ^= work;
    right ^= (work << 8);
    right = ((right << 1) | ((right >>> 31) & 1)) & 0xffffffff;
    work = (leftt ^ right) & 0xaaaaaaaa;
    leftt ^= work;
    right ^= work;
    leftt = ((leftt << 1) | ((leftt >>> 31) & 1)) & 0xffffffff;

    for (round = 0; round < 8; round++) {
        work = (right << 28) | (right >>> 4);
        work ^= keys[keysi++];
        fval = SP7[work & 0x3f];
        fval |= SP5[(work >>> 8) & 0x3f];
        fval |= SP3[(work >>> 16) & 0x3f];
        fval |= SP1[(work >>> 24) & 0x3f];
        work = right ^ keys[keysi++];
        fval |= SP8[work & 0x3f];
        fval |= SP6[(work >>> 8) & 0x3f];
        fval |= SP4[(work >>> 16) & 0x3f];
        fval |= SP2[(work >>> 24) & 0x3f];
        leftt ^= fval;
        work = (leftt << 28) | (leftt >>> 4);
        work ^= keys[keysi++];
        fval = SP7[work & 0x3f];
        fval |= SP5[(work >>> 8) & 0x3f];
        fval |= SP3[(work >>> 16) & 0x3f];
        fval |= SP1[(work >>> 24) & 0x3f];
        work = leftt ^ keys[keysi++];
        fval |= SP8[work & 0x3f];
        fval |= SP6[(work >>> 8) & 0x3f];
        fval |= SP4[(work >>> 16) & 0x3f];
        fval |= SP2[(work >>> 24) & 0x3f];
        right ^= fval;
    }

    right = (right << 31) | (right >>> 1);
    work = (leftt ^ right) & 0xaaaaaaaa;
    leftt ^= work;
    right ^= work;
    leftt = (leftt << 31) | (leftt >>> 1);
    work = ((leftt >>> 8) ^ right) & 0x00ff00ff;
    right ^= work;
    leftt ^= (work << 8);
    work = ((leftt >>> 2) ^ right) & 0x33333333;
    right ^= work;
    leftt ^= (work << 2);
    work = ((right >>> 16) ^ leftt) & 0x0000ffff;
    leftt ^= work;
    right ^= (work << 16);
    work = ((right >>> 4) ^ leftt) & 0x0f0f0f0f;
    leftt ^= work;
    right ^= (work << 4);
    block[0] = right;
    block[1] = leftt;
    return;
}

/* Validation sets:
 *
 * Single-length key, single-length plaintext -
 * Key    : 0123 4567 89ab cdef
 * Plain  : 0123 4567 89ab cde7
 * Cipher : c957 4425 6a5e d31d
 *
 * d3des V5.0a rwo 9208.07 18:44 Graven Imagery
 **********************************************************************/


module.exports.encrypt = function(password) {
    var key = Buffer.alloc(8);
    key.write(password.substring(0, 8));
    var res = Buffer.alloc(8);
    deskey(challenge, EN0);
    des(key, res);
    return { buffer: res, string: res.toString('hex') };
}