/*

From : http://www.webtoolkit.info/javascript-sha1.html

*/

He.Bootstrap('Framework.Sha1');

He.Framework.Sha1 = function Sha1(_msg)
{
	function rotate_left(n,s)
	{
		var t4 = ( n << s ) | (n >>> (32 - s));
		return t4;
	}

	function 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;
	}

	function 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;
	}

	function Utf8Encode(string)
	{
		string = string.replace(/\r\n/g,"\n");
		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;
	}

	var blockstart;
	var i, j;
	var W = new Array(80);
	var H0 = 0x67452301;
	var H1 = 0xEFCDAB89;
	var H2 = 0x98BADCFE;
	var H3 = 0x10325476;
	var H4 = 0xC3D2E1F0;
	var A, B, C, D, E;
	var temp;

	_msg = Utf8Encode(_msg);

	var msg_len = _msg.length;

	var word_array = new Array();
	for(i = 0; i < msg_len - 3; i += 4)
	{
		j = (_msg.charCodeAt(i) << 24) | (_msg.charCodeAt(i+1) << 16) | (_msg.charCodeAt(i+2) << 8) | _msg.charCodeAt(i + 3);
		word_array.push(j);
	}

	switch(msg_len % 4)
	{
		case 0:
			i = 0x080000000;
		break;
		case 1:
			i = _msg.charCodeAt(msg_len - 1) << 24 | 0x0800000;
		break;

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

		case 3:
			i = _msg.charCodeAt(msg_len - 3) << 24 | _msg.charCodeAt(msg_len - 2) << 16 | _msg.charCodeAt(msg_len - 1) << 8	| 0x80;
		break;
	}

	word_array.push(i);

	while((word_array.length % 16) != 14)
	{
		word_array.push(0);
	}

	word_array.push(msg_len >>> 29);
	word_array.push((msg_len << 3) & 0x0ffffffff );

	for(blockstart = 0; blockstart < word_array.length; blockstart += 16)
	{
		for(i = 0; i < 16; ++i)
		{
			W[i] = word_array[blockstart + i];
		}

		for(i = 16; i <= 79; ++i)
		{
			W[i] = rotate_left(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);
		}

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

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

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

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

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

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

	}

	return (cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4)).toLowerCase();
}