JavaScript MD5

	/**
	 * source: http://css-tricks.com/snippets/javascript/javascript-md5/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+CSS-TricksSnippets+%28CSS-Tricks+Snippet+Feed%29
	 * usage: MD5("whatever");
	 */
	var MD5 = function (string) {
function RotateLeft(lValue, iShiftBits) { return (lValue<>>(32-iShiftBits)); }
function AddUnsigned(lX,lY) { var lX4,lY4,lX8,lY8,lResult; 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); } }
function F(x,y,z) { return (x & y) | ((~x) & z); } function G(x,y,z) { return (x & z) | (y & (~z)); } function H(x,y,z) { return (x ^ y ^ z); } function I(x,y,z) { return (y ^ (x | (~z))); }
function FF(a,b,c,d,x,s,ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); };
function GG(a,b,c,d,x,s,ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); };
function HH(a,b,c,d,x,s,ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); };
function II(a,b,c,d,x,s,ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); };
function ConvertToWordArray(string) { var lWordCount; var lMessageLength = string.length; var lNumberOfWords_temp1=lMessageLength + 8; var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64; var lNumberOfWords = (lNumberOfWords_temp2+1)*16; var lWordArray=Array(lNumberOfWords-1); var lBytePosition = 0; var lByteCount = 0; while ( lByteCount < lMessageLength ) { lWordCount = (lByteCount-(lByteCount % 4))/4; lBytePosition = (lByteCount % 4)*8; lWordArraylWordCount = (lWordArraylWordCount | (string.charCodeAt(lByteCount)<lWordCount = lWordArraylWordCount | (0x80<lNumberOfWords-2 = lMessageLength<<3; lWordArraylNumberOfWords-1 = lMessageLength>>>29; return lWordArray; };
function WordToHex(lValue) { var WordToHexValue="",WordToHexValue_temp="",lByte,lCount; 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; };
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 x=Array(); var k,AA,BB,CC,DD,a,b,c,d; var S11=7, S12=12, S13=17, S14=22; var S21=5, S22=9 , S23=14, S24=20; var S31=4, S32=11, S33=16, S34=23; var S41=6, S42=10, S43=15, S44=21;
string = Utf8Encode(string);
x = ConvertToWordArray(string);
a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
for (k=0;kk+0, S11,0xD76AA478); d=FF(d,a,b,c,xk+1, S12,0xE8C7B756); c=FF(c,d,a,b,xk+2, S13,0x242070DB); b=FF(b,c,d,a,xk+3, S14,0xC1BDCEEE); a=FF(a,b,c,d,xk+4, S11,0xF57C0FAF); d=FF(d,a,b,c,xk+5, S12,0x4787C62A); c=FF(c,d,a,b,xk+6, S13,0xA8304613); b=FF(b,c,d,a,xk+7, S14,0xFD469501); a=FF(a,b,c,d,xk+8, S11,0x698098D8); d=FF(d,a,b,c,xk+9, S12,0x8B44F7AF); c=FF(c,d,a,b,xk+10,S13,0xFFFF5BB1); b=FF(b,c,d,a,xk+11,S14,0x895CD7BE); a=FF(a,b,c,d,xk+12,S11,0x6B901122); d=FF(d,a,b,c,xk+13,S12,0xFD987193); c=FF(c,d,a,b,xk+14,S13,0xA679438E); b=FF(b,c,d,a,xk+15,S14,0x49B40821); a=GG(a,b,c,d,xk+1, S21,0xF61E2562); d=GG(d,a,b,c,xk+6, S22,0xC040B340); c=GG(c,d,a,b,xk+11,S23,0x265E5A51); b=GG(b,c,d,a,xk+0, S24,0xE9B6C7AA); a=GG(a,b,c,d,xk+5, S21,0xD62F105D); d=GG(d,a,b,c,xk+10,S22,0x2441453); c=GG(c,d,a,b,xk+15,S23,0xD8A1E681); b=GG(b,c,d,a,xk+4, S24,0xE7D3FBC8); a=GG(a,b,c,d,xk+9, S21,0x21E1CDE6); d=GG(d,a,b,c,xk+14,S22,0xC33707D6); c=GG(c,d,a,b,xk+3, S23,0xF4D50D87); b=GG(b,c,d,a,xk+8, S24,0x455A14ED); a=GG(a,b,c,d,xk+13,S21,0xA9E3E905); d=GG(d,a,b,c,xk+2, S22,0xFCEFA3F8); c=GG(c,d,a,b,xk+7, S23,0x676F02D9); b=GG(b,c,d,a,xk+12,S24,0x8D2A4C8A); a=HH(a,b,c,d,xk+5, S31,0xFFFA3942); d=HH(d,a,b,c,xk+8, S32,0x8771F681); c=HH(c,d,a,b,xk+11,S33,0x6D9D6122); b=HH(b,c,d,a,xk+14,S34,0xFDE5380C); a=HH(a,b,c,d,xk+1, S31,0xA4BEEA44); d=HH(d,a,b,c,xk+4, S32,0x4BDECFA9); c=HH(c,d,a,b,xk+7, S33,0xF6BB4B60); b=HH(b,c,d,a,xk+10,S34,0xBEBFBC70); a=HH(a,b,c,d,xk+13,S31,0x289B7EC6); d=HH(d,a,b,c,xk+0, S32,0xEAA127FA); c=HH(c,d,a,b,xk+3, S33,0xD4EF3085); b=HH(b,c,d,a,xk+6, S34,0x4881D05); a=HH(a,b,c,d,xk+9, S31,0xD9D4D039); d=HH(d,a,b,c,xk+12,S32,0xE6DB99E5); c=HH(c,d,a,b,xk+15,S33,0x1FA27CF8); b=HH(b,c,d,a,xk+2, S34,0xC4AC5665); a=II(a,b,c,d,xk+0, S41,0xF4292244); d=II(d,a,b,c,xk+7, S42,0x432AFF97); c=II(c,d,a,b,xk+14,S43,0xAB9423A7); b=II(b,c,d,a,xk+5, S44,0xFC93A039); a=II(a,b,c,d,xk+12,S41,0x655B59C3); d=II(d,a,b,c,xk+3, S42,0x8F0CCC92); c=II(c,d,a,b,xk+10,S43,0xFFEFF47D); b=II(b,c,d,a,xk+1, S44,0x85845DD1); a=II(a,b,c,d,xk+8, S41,0x6FA87E4F); d=II(d,a,b,c,xk+15,S42,0xFE2CE6E0); c=II(c,d,a,b,xk+6, S43,0xA3014314); b=II(b,c,d,a,xk+13,S44,0x4E0811A1); a=II(a,b,c,d,xk+4, S41,0xF7537E82); d=II(d,a,b,c,xk+11,S42,0xBD3AF235); c=II(c,d,a,b,xk+2, S43,0x2AD7D2BB); b=II(b,c,d,a,xk+9, S44,0xEB86D391); a=AddUnsigned(a,AA); b=AddUnsigned(b,BB); c=AddUnsigned(c,CC); d=AddUnsigned(d,DD); }
var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);
return temp.toLowerCase(); }

Wiki-Datei des Artikels herunterladen