关于密码的简单加密方法

//加密
function encrypto( str, xor, hex ) {
    if ( typeof str !== 'string' || typeof xor !== 'number' || typeof hex !== 'number') {
      return;
    }
    let resultList = []; 
    hex = hex <= 25 ? hex : hex % 25;
    for ( let i=0; i<str.length; i++ ) {
      // 提取字符串每个字符的ascll码
      let charCode = str.charCodeAt(i);
      // 进行异或加密
      charCode = (charCode * 1) ^ xor;
      // 异或加密后的字符转成 hex 位数的字符串
      charCode = charCode.toString(hex);
      resultList.push(charCode);
    }
    let splitStr = String.fromCharCode(hex + 97);
    let resultStr = resultList.join( splitStr );
    return resultStr;
}

//解密
function decrypto( str, xor, hex ) { 
    if ( typeof str !== 'string' || typeof xor !== 'number' || typeof hex !== 'number') {
      return;
    }
    let strCharList = [];
    let resultList = []; 
    hex = hex <= 25 ? hex : hex % 25;
    // 解析出分割字符
    let splitStr = String.fromCharCode(hex + 97);
    // 分割出加密字符串的加密后的每个字符
    strCharList = str.split(splitStr);
    for ( let i=0; i<strCharList.length; i++ ) {
      // 将加密后的每个字符转成加密后的ascll码
      let charCode = parseInt(strCharList[i], hex);
      // 异或解密出原字符的ascll码
      charCode = (charCode * 1) ^ xor;
      let strChar = String.fromCharCode(charCode);
      resultList.push(strChar);
    }
    let resultStr = resultList.join('');
    return resultStr;
}