Md5-typescript/index.ts at master · FreshTouch/Md5-typescript · GitHub

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export class Md5 {

    private static _string: string;
    private static x: Array<number> = <Array<number>>Array();
    private static k: number;
    private static AA: number;
    private static BB: number;
    private static CC: number;
    private static DD: number;
    private static a: number;
    private static b: number;
    private static c: number;
    private static d: number;
    private static S11: number = 7;
    private static S12: number = 12;
    private static S13: number = 17;
    private static S14: number = 22;
    private static S21: number = 5;
    private static S22: number = 9;
    private static S23: number = 14;
    private static S24: number = 20;
    private static S31: number = 4;
    private static S32: number = 11;
    private static S33: number = 16;
    private static S34: number = 23;
    private static S41: number = 6;
    private static S42: number = 10;
    private static S43: number = 15;
    private static S44: number = 21;

    private static RotateLeft: Function = ( lValue: number, iShiftBits: number ) : number => (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));

    private static AddUnsigned( lX: number, lY: number ) : number
    {
        let lX4: number,
            lY4: number,
            lX8: number,
            lY8: number,
            lResult: number;

        lX8 = (lX & 0x80000000);
        lY8 = (lY & 0x80000000);
        lX4 = (lX & 0x40000000);
        lY4 = (lY & 0x40000000);
        lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);

        if ( !!(lX4 & lY4) )
        {
            return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
        }

        if ( !!(lX4 | lY4) )
        {
            if ( !!(lResult & 0x40000000) )
            {
                return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
            }
            else
            {
                return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
            }
        }
        else
        {
            return (lResult ^ lX8 ^ lY8);
        }
    }

    private static F: Function = ( x: number, y: number, z: number ) : number => (x & y) | ((~x) & z);

    private static G: Function = ( x: number, y: number, z: number ) : number => (x & z) | (y & (~z));

    private static H: Function = ( x: number, y: number, z: number ) : number => (x ^ y ^ z);

    private static I: Function = ( x: number, y: number, z: number ) : number => (y ^ (x | (~z)));

    private static FF( a: number, b: number, c: number, d: number, x: number, s: number, ac: number ) : number
    {
        a = this.AddUnsigned(a, this.AddUnsigned(this.AddUnsigned(this.F(b, c, d), x), ac));
        return this.AddUnsigned(this.RotateLeft(a, s), b);
    }

    private static GG( a: number, b: number, c: number, d: number, x: number, s: number, ac: number) : number
    {
        a = this.AddUnsigned(a, this.AddUnsigned(this.AddUnsigned(this.G(b, c, d), x), ac));
        return this.AddUnsigned(this.RotateLeft(a, s), b);
    }

    private static HH( a: number, b: number, c: number, d: number, x: number, s: number, ac: number ) : number
    {
        a = this.AddUnsigned(a, this.AddUnsigned(this.AddUnsigned(this.H(b, c, d), x), ac));
        return this.AddUnsigned(this.RotateLeft(a, s), b);
    }

    private static II(a: number, b: number, c: number, d: number, x: number, s: number, ac: number) : number
    {
        a = this.AddUnsigned(a, this.AddUnsigned(this.AddUnsigned(this.I(b, c, d), x), ac));
        return this.AddUnsigned(this.RotateLeft(a, s), b);
    }

    private static ConvertToWordArray( string: string ) : Array<number>
    {
        let lWordCount: number,
            lMessageLength: number = string.length,
            lNumberOfWords_temp1: number = lMessageLength + 8,
            lNumberOfWords_temp2: number = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64,
            lNumberOfWords: number = (lNumberOfWords_temp2 + 1) * 16,
            lWordArray: Array<number> = Array(lNumberOfWords - 1),
            lBytePosition: number = 0,
            lByteCount: number = 0;

        while ( lByteCount < lMessageLength )
        {
            lWordCount = (lByteCount - (lByteCount % 4)) / 4;
            lBytePosition = (lByteCount % 4) * 8;
            lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
            lByteCount++;
        }

        lWordCount = (lByteCount - (lByteCount % 4)) / 4;
        lBytePosition = (lByteCount % 4) * 8;
        lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
        lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
        lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;

        return lWordArray;
    }

    private static WordToHex( lValue: number ) : string
    {
        let WordToHexValue: string = "",
            WordToHexValue_temp: string = "",
            lByte: number,
            lCount: number;

        for ( lCount = 0; lCount <= 3; lCount++ )
        {
            lByte = (lValue >>> (lCount * 8)) & 255;
            WordToHexValue_temp = "0" + lByte.toString(16);
            WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
        }

        return WordToHexValue;
    }

    private static Utf8Encode( string: string ) : string
    {
        let utftext: string = "",
            c: number;

        string = string.replace(/\r\n/g, "\n");

        for ( let n = 0; n < string.length; n++ )
        {
            c = string.charCodeAt(n);

            if ( c < 128 )
            {
                utftext += String.fromCharCode(c);
            }
            else if ( (c > 127) && (c < 2048) )
            {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else
            {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    }

    public static init( string: any ) : string
    {
        let temp: string;

        if ( typeof string !== 'string' )
            string = JSON.stringify(string);

        this._string = this.Utf8Encode(string);
        this.x = this.ConvertToWordArray(this._string);

        this.a = 0x67452301;
        this.b = 0xEFCDAB89;
        this.c = 0x98BADCFE;
        this.d = 0x10325476;

        for ( this.k = 0; this.k < this.x.length; this.k += 16 )
        {
            this.AA = this.a;
            this.BB = this.b;
            this.CC = this.c;
            this.DD = this.d;
            this.a = this.FF(this.a, this.b, this.c, this.d, this.x[this.k], this.S11, 0xD76AA478);
            this.d = this.FF(this.d, this.a, this.b, this.c, this.x[this.k + 1], this.S12, 0xE8C7B756);
            this.c = this.FF(this.c, this.d, this.a, this.b, this.x[this.k + 2], this.S13, 0x242070DB);
            this.b = this.FF(this.b, this.c, this.d, this.a, this.x[this.k + 3], this.S14, 0xC1BDCEEE);
            this.a = this.FF(this.a, this.b, this.c, this.d, this.x[this.k + 4], this.S11, 0xF57C0FAF);
            this.d = this.FF(this.d, this.a, this.b, this.c, this.x[this.k + 5], this.S12, 0x4787C62A);
            this.c = this.FF(this.c, this.d, this.a, this.b, this.x[this.k + 6], this.S13, 0xA8304613);
            this.b = this.FF(this.b, this.c, this.d, this.a, this.x[this.k + 7], this.S14, 0xFD469501);
            this.a = this.FF(this.a, this.b, this.c, this.d, this.x[this.k + 8], this.S11, 0x698098D8);
            this.d = this.FF(this.d, this.a, this.b, this.c, this.x[this.k + 9], this.S12, 0x8B44F7AF);
            this.c = this.FF(this.c, this.d, this.a, this.b, this.x[this.k + 10], this.S13, 0xFFFF5BB1);
            this.b = this.FF(this.b, this.c, this.d, this.a, this.x[this.k + 11], this.S14, 0x895CD7BE);
            this.a = this.FF(this.a, this.b, this.c, this.d, this.x[this.k + 12], this.S11, 0x6B901122);
            this.d = this.FF(this.d, this.a, this.b, this.c, this.x[this.k + 13], this.S12, 0xFD987193);
            this.c = this.FF(this.c, this.d, this.a, this.b, this.x[this.k + 14], this.S13, 0xA679438E);
            this.b = this.FF(this.b, this.c, this.d, this.a, this.x[this.k + 15], this.S14, 0x49B40821);
            this.a = this.GG(this.a, this.b, this.c, this.d, this.x[this.k + 1], this.S21, 0xF61E2562);
            this.d = this.GG(this.d, this.a, this.b, this.c, this.x[this.k + 6], this.S22, 0xC040B340);
            this.c = this.GG(this.c, this.d, this.a, this.b, this.x[this.k + 11], this.S23, 0x265E5A51);
            this.b = this.GG(this.b, this.c, this.d, this.a, this.x[this.k], this.S24, 0xE9B6C7AA);
            this.a = this.GG(this.a, this.b, this.c, this.d, this.x[this.k + 5], this.S21, 0xD62F105D);
            this.d = this.GG(this.d, this.a, this.b, this.c, this.x[this.k + 10], this.S22, 0x2441453);
            this.c = this.GG(this.c, this.d, this.a, this.b, this.x[this.k + 15], this.S23, 0xD8A1E681);
            this.b = this.GG(this.b, this.c, this.d, this.a, this.x[this.k + 4], this.S24, 0xE7D3FBC8);
            this.a = this.GG(this.a, this.b, this.c, this.d, this.x[this.k + 9], this.S21, 0x21E1CDE6);
            this.d = this.GG(this.d, this.a, this.b, this.c, this.x[this.k + 14], this.S22, 0xC33707D6);
            this.c = this.GG(this.c, this.d, this.a, this.b, this.x[this.k + 3], this.S23, 0xF4D50D87);
            this.b = this.GG(this.b, this.c, this.d, this.a, this.x[this.k + 8], this.S24, 0x455A14ED);
            this.a = this.GG(this.a, this.b, this.c, this.d, this.x[this.k + 13], this.S21, 0xA9E3E905);
            this.d = this.GG(this.d, this.a, this.b, this.c, this.x[this.k + 2], this.S22, 0xFCEFA3F8);
            this.c = this.GG(this.c, this.d, this.a, this.b, this.x[this.k + 7], this.S23, 0x676F02D9);
            this.b = this.GG(this.b, this.c, this.d, this.a, this.x[this.k + 12], this.S24, 0x8D2A4C8A);
            this.a = this.HH(this.a, this.b, this.c, this.d, this.x[this.k + 5], this.S31, 0xFFFA3942);
            this.d = this.HH(this.d, this.a, this.b, this.c, this.x[this.k + 8], this.S32, 0x8771F681);
            this.c = this.HH(this.c, this.d, this.a, this.b, this.x[this.k + 11], this.S33, 0x6D9D6122);
            this.b = this.HH(this.b, this.c, this.d, this.a, this.x[this.k + 14], this.S34, 0xFDE5380C);
            this.a = this.HH(this.a, this.b, this.c, this.d, this.x[this.k + 1], this.S31, 0xA4BEEA44);
            this.d = this.HH(this.d, this.a, this.b, this.c, this.x[this.k + 4], this.S32, 0x4BDECFA9);
            this.c = this.HH(this.c, this.d, this.a, this.b, this.x[this.k + 7], this.S33, 0xF6BB4B60);
            this.b = this.HH(this.b, this.c, this.d, this.a, this.x[this.k + 10], this.S34, 0xBEBFBC70);
            this.a = this.HH(this.a, this.b, this.c, this.d, this.x[this.k + 13], this.S31, 0x289B7EC6);
            this.d = this.HH(this.d, this.a, this.b, this.c, this.x[this.k], this.S32, 0xEAA127FA);
            this.c = this.HH(this.c, this.d, this.a, this.b, this.x[this.k + 3], this.S33, 0xD4EF3085);
            this.b = this.HH(this.b, this.c, this.d, this.a, this.x[this.k + 6], this.S34, 0x4881D05);
            this.a = this.HH(this.a, this.b, this.c, this.d, this.x[this.k + 9], this.S31, 0xD9D4D039);
            this.d = this.HH(this.d, this.a, this.b, this.c, this.x[this.k + 12], this.S32, 0xE6DB99E5);
            this.c = this.HH(this.c, this.d, this.a, this.b, this.x[this.k + 15], this.S33, 0x1FA27CF8);
            this.b = this.HH(this.b, this.c, this.d, this.a, this.x[this.k + 2], this.S34, 0xC4AC5665);
            this.a = this.II(this.a, this.b, this.c, this.d, this.x[this.k], this.S41, 0xF4292244);
            this.d = this.II(this.d, this.a, this.b, this.c, this.x[this.k + 7], this.S42, 0x432AFF97);
            this.c = this.II(this.c, this.d, this.a, this.b, this.x[this.k + 14], this.S43, 0xAB9423A7);
            this.b = this.II(this.b, this.c, this.d, this.a, this.x[this.k + 5], this.S44, 0xFC93A039);
            this.a = this.II(this.a, this.b, this.c, this.d, this.x[this.k + 12], this.S41, 0x655B59C3);
            this.d = this.II(this.d, this.a, this.b, this.c, this.x[this.k + 3], this.S42, 0x8F0CCC92);
            this.c = this.II(this.c, this.d, this.a, this.b, this.x[this.k + 10], this.S43, 0xFFEFF47D);
            this.b = this.II(this.b, this.c, this.d, this.a, this.x[this.k + 1], this.S44, 0x85845DD1);
            this.a = this.II(this.a, this.b, this.c, this.d, this.x[this.k + 8], this.S41, 0x6FA87E4F);
            this.d = this.II(this.d, this.a, this.b, this.c, this.x[this.k + 15], this.S42, 0xFE2CE6E0);
            this.c = this.II(this.c, this.d, this.a, this.b, this.x[this.k + 6], this.S43, 0xA3014314);
            this.b = this.II(this.b, this.c, this.d, this.a, this.x[this.k + 13], this.S44, 0x4E0811A1);
            this.a = this.II(this.a, this.b, this.c, this.d, this.x[this.k + 4], this.S41, 0xF7537E82);
            this.d = this.II(this.d, this.a, this.b, this.c, this.x[this.k + 11], this.S42, 0xBD3AF235);
            this.c = this.II(this.c, this.d, this.a, this.b, this.x[this.k + 2], this.S43, 0x2AD7D2BB);
            this.b = this.II(this.b, this.c, this.d, this.a, this.x[this.k + 9], this.S44, 0xEB86D391);

            this.a = this.AddUnsigned(this.a, this.AA);
            this.b = this.AddUnsigned(this.b, this.BB);
            this.c = this.AddUnsigned(this.c, this.CC);
            this.d = this.AddUnsigned(this.d, this.DD);
        }

        temp = this.WordToHex(this.a) + this.WordToHex(this.b) + this.WordToHex(this.c) + this.WordToHex(this.d);
        return temp.toLowerCase();
    }
}