md5 js

js-md5 - npm https://www.npmjs.com/package/js-md5

  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(string) {
    var lWordCount;
    var lMessageLength = string.length;
    var lNumberOfWordsTempOne = lMessageLength + 8;
    var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
    var lNumberOfWords = (lNumberOfWordsTempTwo + 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;
      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;
  };
  var wordToHex = function(lValue) {
    var WordToHexValue = "",
      WordToHexValueTemp = "",
      lByte, lCount;
    for (lCount = 0; lCount <= 3; lCount++) {
      lByte = (lValue >>> (lCount * 8)) & 255;
      WordToHexValueTemp = "0" + lByte.toString(16);
      WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
    }
    return WordToHexValue;
  };
  var uTF8Encode = function(string) {
    string = string.replace(/x0dx0a/g, "x0a");
    var output = "";
    for (var n = 0; n < string.length; n++) {
      var c = string.charCodeAt(n);
      if (c < 128) {
        output += String.fromCharCode(c);
      } else if ((c > 127) && (c < 2048)) {
        output += String.fromCharCode((c >> 6) | 192);
        output += String.fromCharCode((c & 63) | 128);
      } else {
        output += String.fromCharCode((c >> 12) | 224);
        output += String.fromCharCode(((c >> 6) & 63) | 128);
        output += String.fromCharCode((c & 63) | 128);
      }
    }
    return output;
  };

  function md5(string) {
    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; k < x.length; 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 tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
    return tempValue.toLowerCase();
  }

  //用于微信小程序
  module.exports = {
    md5: md5
  }

  // http://zixuephp.net/static/js/md5.js  
  // 在线测试，用前端js实现MD5()加密 http://www.zixuephp.net/uploads/file/20171102/1509614764989508.html