md5 and utf_encode js libraries

app/assets/javascripts/md5.js

+function md5 (str) {
+  // http://kevin.vanzonneveld.net
+  // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
+  // + namespaced by: Michael White (http://getsprink.com)
+  // +    tweaked by: Jack
+  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+  // +      input by: Brett Zamir (http://brett-zamir.me)
+  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+  // -    depends on: utf8_encode
+  // *     example 1: md5('Kevin van Zonneveld');
+  // *     returns 1: '6e658d4bfcb59cc13f96c14450ac40b9'
+  var xl;
+
+  var rotateLeft = function (lValue, iShiftBits) {
+    return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
+  };
+
+  var addUnsigned = function (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);
+    }
+  };
+
+  var _F = function (x, y, z) {
+    return (x & y) | ((~x) & z);
+  };
+  var _G = function (x, y, z) {
+    return (x & z) | (y & (~z));
+  };
+  var _H = function (x, y, z) {
+    return (x ^ y ^ z);
+  };
+  var _I = function (x, y, z) {
+    return (y ^ (x | (~z)));
+  };
+
+  var _FF = function (a, b, c, d, x, s, ac) {
+    a = addUnsigned(a, addUnsigned(addUnsigned(_F(b, c, d), x), ac));
+    return addUnsigned(rotateLeft(a, s), b);
+  };
+
+  var _GG = function (a, b, c, d, x, s, ac) {
+    a = addUnsigned(a, addUnsigned(addUnsigned(_G(b, c, d), x), ac));
+    return addUnsigned(rotateLeft(a, s), b);
+  };
+
+  var _HH = function (a, b, c, d, x, s, ac) {
+    a = addUnsigned(a, addUnsigned(addUnsigned(_H(b, c, d), x), ac));
+    return addUnsigned(rotateLeft(a, s), b);
+  };
+
+  var _II = function (a, b, c, d, x, s, ac) {
+    a = addUnsigned(a, addUnsigned(addUnsigned(_I(b, c, d), x), ac));
+    return addUnsigned(rotateLeft(a, s), b);
+  };
+
+  var convertToWordArray = function (str) {
+    var lWordCount;
+    var lMessageLength = str.length;
+    var lNumberOfWords_temp1 = lMessageLength + 8;
+    var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
+    var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
+    var lWordArray = new Array(lNumberOfWords - 1);
+    var lBytePosition = 0;
+    var lByteCount = 0;
+    while (lByteCount < lMessageLength) {
+      lWordCount = (lByteCount - (lByteCount % 4)) / 4;
+      lBytePosition = (lByteCount % 4) * 8;
+      lWordArray[lWordCount] = (lWordArray[lWordCount] | (str.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;
+  };
+
+  var wordToHex = function (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;
+  };
+
+  var x = [],
+    k, AA, BB, CC, DD, a, b, c, d, S11 = 7,
+    S12 = 12,
+    S13 = 17,
+    S14 = 22,
+    S21 = 5,
+    S22 = 9,
+    S23 = 14,
+    S24 = 20,
+    S31 = 4,
+    S32 = 11,
+    S33 = 16,
+    S34 = 23,
+    S41 = 6,
+    S42 = 10,
+    S43 = 15,
+    S44 = 21;
+
+  str = this.utf8_encode(str);
+  x = convertToWordArray(str);
+  a = 0x67452301;
+  b = 0xEFCDAB89;
+  c = 0x98BADCFE;
+  d = 0x10325476;
+
+  xl = x.length;
+  for (k = 0; k < xl; k += 16) {
+    AA = a;
+    BB = b;
+    CC = c;
+    DD = d;
+    a = _FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
+    d = _FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
+    c = _FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
+    b = _FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
+    a = _FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
+    d = _FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
+    c = _FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
+    b = _FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
+    a = _FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
+    d = _FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
+    c = _FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
+    b = _FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
+    a = _FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
+    d = _FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
+    c = _FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
+    b = _FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
+    a = _GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
+    d = _GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
+    c = _GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
+    b = _GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
+    a = _GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
+    d = _GG(d, a, b, c, x[k + 10], S22, 0x2441453);
+    c = _GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
+    b = _GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
+    a = _GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
+    d = _GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
+    c = _GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
+    b = _GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
+    a = _GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
+    d = _GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
+    c = _GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
+    b = _GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
+    a = _HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
+    d = _HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
+    c = _HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
+    b = _HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
+    a = _HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
+    d = _HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
+    c = _HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
+    b = _HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
+    a = _HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
+    d = _HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
+    c = _HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
+    b = _HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
+    a = _HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
+    d = _HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
+    c = _HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
+    b = _HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
+    a = _II(a, b, c, d, x[k + 0], S41, 0xF4292244);
+    d = _II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
+    c = _II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
+    b = _II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
+    a = _II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
+    d = _II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
+    c = _II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
+    b = _II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
+    a = _II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
+    d = _II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
+    c = _II(c, d, a, b, x[k + 6], S43, 0xA3014314);
+    b = _II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
+    a = _II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
+    d = _II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
+    c = _II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
+    b = _II(b, c, d, a, x[k + 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();
+}

app/assets/javascripts/utf8_encode.js

+function utf8_encode (argString) {
+  // http://kevin.vanzonneveld.net
+  // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
+  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+  // +   improved by: sowberry
+  // +    tweaked by: Jack
+  // +   bugfixed by: Onno Marsman
+  // +   improved by: Yves Sucaet
+  // +   bugfixed by: Onno Marsman
+  // +   bugfixed by: Ulrich
+  // +   bugfixed by: Rafal Kukawski
+  // +   improved by: kirilloid
+  // +   bugfixed by: kirilloid
+  // *     example 1: utf8_encode('Kevin van Zonneveld');
+  // *     returns 1: 'Kevin van Zonneveld'
+
+  if (argString === null || typeof argString === "undefined") {
+    return "";
+  }
+
+  var string = (argString + ''); // .replace(/\r\n/g, "\n").replace(/\r/g, "\n");
+  var utftext = '',
+    start, end, stringl = 0;
+
+  start = end = 0;
+  stringl = string.length;
+  for (var n = 0; n < stringl; n++) {
+    var c1 = string.charCodeAt(n);
+    var enc = null;
+
+    if (c1 < 128) {
+      end++;
+    } else if (c1 > 127 && c1 < 2048) {
+      enc = String.fromCharCode(
+         (c1 >> 6)        | 192,
+        ( c1        & 63) | 128
+      );
+    } else if (c1 & 0xF800 != 0xD800) {
+      enc = String.fromCharCode(
+         (c1 >> 12)       | 224,
+        ((c1 >> 6)  & 63) | 128,
+        ( c1        & 63) | 128
+      );
+    } else { // surrogate pairs
+      if (c1 & 0xFC00 != 0xD800) { throw new RangeError("Unmatched trail surrogate at " + n); }
+      var c2 = string.charCodeAt(++n);
+      if (c2 & 0xFC00 != 0xDC00) { throw new RangeError("Unmatched lead surrogate at " + (n-1)); }
+      c1 = ((c1 & 0x3FF) << 10) + (c2 & 0x3FF) + 0x10000;
+      enc = String.fromCharCode(
+         (c1 >> 18)       | 240,
+        ((c1 >> 12) & 63) | 128,
+        ((c1 >> 6)  & 63) | 128,
+        ( c1        & 63) | 128
+      );
+    }
+    if (enc !== null) {
+      if (end > start) {
+        utftext += string.slice(start, end);
+      }
+      utftext += enc;
+      start = end = n + 1;
+    }
+  }
+
+  if (end > start) {
+    utftext += string.slice(start, stringl);
+  }
+
+  return utftext;
+}