web-utils-super/md5.js

前端函数库

/*
 * @Description: md5加密字符串
 * @Author: liushuang
 * @Date: 2022-09-06 12:15:36
 * @LastEditTime: 2022-09-06 11:34:38
 */
const rotateLeft = function (lValue, iShiftBits) {
  return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
};

const addUnsigned = function (lX, lY) {
  let lX4;
  let lY4;
  let lX8;
  let lY8;
  let 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;
    return lResult ^ 0x40000000 ^ lX8 ^ lY8;
  }
  return lResult ^ lX8 ^ lY8;
};

const F = function (x, y, z) {
  return (x & y) | (~x & z);
};

const G = function (x, y, z) {
  return (x & z) | (y & ~z);
};

const H = function (x, y, z) {
  return x ^ y ^ z;
};

const I = function (x, y, z) {
  return y ^ (x | ~z);
};

const 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);
};

const 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);
};

const 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);
};

const 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);
};

const convertToWordArray = function (string) {
  let lWordCount;
  const lMessageLength = string.length;
  const lNumberOfWordsTempOne = lMessageLength + 8;
  const lNumberOfWordsTempTwo =
    (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
  const lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
  const lWordArray = Array(lNumberOfWords - 1);
  let lBytePosition = 0;
  let 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;
};

const wordToHex = function (lValue) {
  let WordToHexValue = "";
  let WordToHexValueTemp = "";
  let lByte;
  let lCount;
  for (lCount = 0; lCount <= 3; lCount++) {
    lByte = (lValue >>> (lCount * 8)) & 255;
    WordToHexValueTemp = `0${lByte.toString(16)}`;
    WordToHexValue += WordToHexValueTemp.substr(
      WordToHexValueTemp.length - 2,
      2
    );
  }
  return WordToHexValue;
};

const uTF8Encode = function (string) {
  string = string.replace(/\x0d\x0a/g, "\x0a");
  let output = "";
  for (let n = 0; n < string.length; n++) {
    const 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;
};

/**
 * @desc: md5加密
 * @param {String} string
 * @return {String}
 */
function md5(string) {
  let x = Array();
  let k;
  let AA;
  let BB;
  let CC;
  let DD;
  let a;
  let b;
  let c;
  let d;
  const S11 = 7;
  const S12 = 12;
  const S13 = 17;
  const S14 = 22;
  const S21 = 5;
  const S22 = 9;
  const S23 = 14;
  const S24 = 20;
  const S31 = 4;
  const S32 = 11;
  const S33 = 16;
  const S34 = 23;
  const S41 = 6;
  const S42 = 10;
  const S43 = 15;
  const 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);
  }
  const tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
  return tempValue.toLowerCase();
}

module.exports = md5;