Type Script y Sha 1

module gtm {
	export class Sha1 {

		private blockstart: any;
		private W = new Array(80);
		private H0 = 0x67452301;
		private H1 = 0xEFCDAB89;
		private H2 = 0x98BADCFE;
		private H3 = 0x10325476;
		private H4 = 0xC3D2E1F0;
		private A; 
		private B;
		private C;
		private D;
		private E;
		private temp;
		public msg;
		private msg_len;
		private word_array;
		/*msg :        sha1   */
		constructor(msg) {
			this.word_array = new Array();
			this.msg = this.Utf8Encode(msg);
			this.msg_len = this.msg.length;
			for (let i = 0; i < this.msg_len - 3; i += 4) {
				let j = this.msg.charCodeAt(i) << 24 | this.msg.charCodeAt(i + 1) << 16 |
					this.msg.charCodeAt(i + 2) << 8 | this.msg.charCodeAt(i + 3);
				this.word_array.push(j);
			}
			this.initMsg(this.msg_len);
		}

		public initMsg(msg_len) {
			let i;
			switch (msg_len % 4) {
				case 0:
					i = 0x080000000;
					break;
				case 1:
					i = this.msg.charCodeAt(msg_len - 1) << 24 | 0x0800000;
					break;

				case 2:
					i = this.msg.charCodeAt(msg_len - 2) << 24 | this.msg.charCodeAt(msg_len - 1) << 16 | 0x08000;
					break;

				case 3:
					i = this.msg.charCodeAt(msg_len - 3) << 24 | this.msg.charCodeAt(msg_len - 2) << 16 | this.msg.charCodeAt(msg_len - 1) << 8 | 0x80;
					break;
			}
			this.word_array.push(i);
			while ((this.word_array.length % 16) != 14) this.word_array.push(0);
			this.word_array.push(msg_len >>> 29);
			this.word_array.push((msg_len << 3) & 0x0ffffffff);
			this.getTemp();

		}

		public getTemp() {

			for (this.blockstart = 0; this.blockstart < this.word_array.length; this.blockstart += 16) {

				for (let i = 0; i < 16; i++) this.W[i] = this.word_array[this.blockstart + i];
				for (let i = 16; i <= 79; i++) this.W[i] = this.rotate_left(this.W[i - 3] ^ this.W[i - 8] ^ this.W[i - 14] ^ this.W[i - 16], 1);

				this.A = this.H0;
				this.B = this.H1;
				this.C = this.H2;
				this.D = this.H3;
				this.E = this.H4;

				for (let i = 0; i <= 19; i++) {
					this.temp = (this.rotate_left(this.A, 5) + ((this.B & this.C) | (~this.B & this.D)) + this.E + this.W[i] + 0x5A827999) & 0x0ffffffff;
					this.E = this.D;
					this.D = this.C;
					this.C = this.rotate_left(this.B, 30);
					this.B = this.A;
					this.A = this.temp;
				}

				for (let i = 20; i <= 39; i++) {
					this.temp = (this.rotate_left(this.A, 5) + (this.B ^ this.C ^ this.D) + this.E + this.W[i] + 0x6ED9EBA1) & 0x0ffffffff;
					this.E = this.D;
					this.D = this.C;
					this.C = this.rotate_left(this.B, 30);
					this.B = this.A;
					this.A = this.temp;
				}

				for (let i = 40; i <= 59; i++) {
					this.temp = (this.rotate_left(this.A, 5) + ((this.B & this.C) | (this.B & this.D) | (this.C & this.D)) + this.E + this.W[i] + 0x8F1BBCDC) & 0x0ffffffff;
					this.E = this.D;
					this.D = this.C;
					this.C = this.rotate_left(this.B, 30);
					this.B = this.A;
					this.A = this.temp;
				}

				for (let i = 60; i <= 79; i++) {
					this.temp = (this.rotate_left(this.A, 5) + (this.B ^ this.C ^ this.D) + this.E + this.W[i] + 0xCA62C1D6) & 0x0ffffffff;
					this.E = this.D;
					this.D = this.C;
					this.C = this.rotate_left(this.B, 30);
					this.B = this.A;
					this.A = this.temp;
				}

				this.H0 = (this.H0 + this.A) & 0x0ffffffff;
				this.H1 = (this.H1 + this.B) & 0x0ffffffff;
				this.H2 = (this.H2 + this.C) & 0x0ffffffff;
				this.H3 = (this.H3 + this.D) & 0x0ffffffff;
				this.H4 = (this.H4 + this.E) & 0x0ffffffff;
			}

		}
		
		/**  sha1     */
		public hex_sha1() {
			let temp = this.cvt_hex(this.H0) + this.cvt_hex(this.H1) + this.cvt_hex(this.H2) + this.cvt_hex(this.H3) + this.cvt_hex(this.H4);
			return temp.toLowerCase();
		}

		private rotate_left(n, s) {
			var t4 = (n << s) | (n >>> (32 - s));
			return t4;
		};

		private lsb_hex(val) {
			var str = "";
			var i;
			var vh;
			var vl;

			for (i = 0; i <= 6; i += 2) {
				vh = (val >>> (i * 4 + 4)) & 0x0f;
				vl = (val >>> (i * 4)) & 0x0f;
				str += vh.toString(16) + vl.toString(16);
			}
			return str;
		};

		private cvt_hex(val) {
			var str = "";
			var i;
			var v;

			for (i = 7; i >= 0; i--) {
				v = (val >>> (i * 4)) & 0x0f;
				str += v.toString(16);
			}
			return str;
		};


		private Utf8Encode(string) {
			string = string.replace(/\r
/g, "
");
			var utftext = "";

			for (var n = 0; n < string.length; n++) {

				var 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;
		};


	}


}