113 lines
4.1 KiB
JavaScript
113 lines
4.1 KiB
JavaScript
/*global require */
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(/**
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* @param {CryptoApi} CryptoApi
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* @returns {Md2}
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*/
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function (CryptoApi) {
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'use strict';
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/**
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* @class Md2
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* @extends Hasher8
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* @implements HasherInterface
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* @desc Md2 hasher
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*/
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var Md2 = function (name, options) {
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this.constructor(name, options);
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};
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Md2.prototype = Object.create(CryptoApi.Hasher8.prototype);
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/**
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* @memberOf Md2
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* @constructor
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*/
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Md2.prototype.constructor = function (name, options) {
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CryptoApi.Hasher8.prototype.constructor.call(this, name, options);
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/**
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* @desc Hash state
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* @memberOf! Md2#
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* @alias state.hash
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* @type {number[]}
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*/
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this.state.hash = new Array(48);
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/**
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* @desc Checksum
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* @memberOf! Md2#
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* @alias state.checksum
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* @type {number[]}
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*/
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this.state.checksum = new Array(16);
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};
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/**
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* @desc Constants from Pi
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* @link https://github.com/e-sushi/MD2-S-box-creator
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* @memberOf Md2#
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* @member {number[]} piSubst
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*/
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Md2.prototype.piSubst = [
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0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
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0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
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0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
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0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
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0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
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0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
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0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
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0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
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0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
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0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
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0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
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0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
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0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
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0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
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0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
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0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14];
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/**
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* @memberOf Md2
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* @method processBlock
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* @param {number[]} block
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*/
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Md2.prototype.processBlock = function processBlock(block) {
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// Append hash
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for (var i = 0; i < 16; i++) {
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this.state.hash[16 + i] = block[i];
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this.state.hash[32 + i] = this.state.hash[16 + i] ^ this.state.hash[i];
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}
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// 18 Rounds
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var t = 0;
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for (i = 0; i < 18; i++) {
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for (var j = 0; j < 48; j++) {
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t = this.state.hash[j] ^= this.piSubst[t];
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}
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t = (t + i) & 0xff;
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}
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// Append checksum
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t = this.state.checksum[15];
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for (i = 0; i < 16; i++) {
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t = this.state.checksum[i] ^= this.piSubst[block[i] ^ t];
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}
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};
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/**
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* @memberOf Md2
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* @method finalize
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* @return {HashArray}
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*/
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Md2.prototype.finalize = function finalize() {
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var padLen = this.state.message.length & 0xf;
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this.update(new Array(17 - padLen).join(String.fromCharCode(16 - padLen)));
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// Process checksum
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this.updateFromArray(this.state.checksum);
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// Return hash
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return CryptoApi.hashArray(this.state.hash.slice(0, 16));
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};
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CryptoApi.Hashers.add('md2', Md2);
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return Md2;
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})(
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this.CryptoApi || require('./crypto-api')
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); |