var crypto = require('crypto'),
    algorithm = 'aes-128-cbc',
    password = 'zW7f5YXELwlZMEDvkaeGe1nu51QbAwhB';
var secretKey = 'zW7f5YXELwlZMEDvkaeGe1nu51QbAwhB';

// var crypto = require('crypto'),
//     algorithm = 'aes-256-ctr',
//     password = 'd6F3Efeq';
 const key = crypto.createHash('sha256').update(password).digest('base64').substr(0, 16);

function encrypt(buffer){
  var cipher = crypto.createCipher(algorithm,key)
  var crypted = Buffer.concat([cipher.update(buffer),cipher.final()]);
  return crypted;
}

function decrypt(buffer){
  var decipher = crypto.createDecipher(algorithm,key)
  var dec = Buffer.concat([decipher.update(buffer) , decipher.final()]);
  return dec;
}

 function aesDecrypt (value) {
  // try {
    const encryptedText = Buffer.from(value, 'hex');
    console.log("encryptedText",encryptedText ,encryptedText.toString());
    const key = crypto.createHash('sha256').update(secretKey).digest('base64').substr(0, 16);
    // decipher the string
    console.log("key",key);
    const decipher = crypto.createDecipher(algorithm, Buffer.from(key));
    console.log("decipher",decipher);
    let decrypted = decipher.update(encryptedText, 'hex', 'utf8');
    console.log("decrypted",decrypted, decrypted.length);
    decrypted += decipher.final();
    console.log("decrypted",decrypted, decrypted.length);
    return decrypted;
  // } catch (err) {
  //   // in case failed decryption, return the encrypted itself
  //   return value;

  // }
}
function aesEncrypt(value) {
  // try {
    const key = crypto.createHash('sha256').update(secretKey).digest('base64').substr(0, 16);
    console.log("key",key,Buffer.from(key));
    const cipher = crypto.createCipher(algorithm, Buffer.from(key));
    // cipher.setAutoPadding(false)
    let crypted = cipher.update(value, 'utf8', 'hex');
    console.log("crypted_______________",crypted);
    crypted += cipher.final('hex');
    console.log("crypted",crypted,"_________________", "+++++++",crypted.toString('hex'), value);
    return crypted.toString('hex');
  // } catch (err) {
  //   console.log('aesEncryptError', { value, err });
  //   // in case failed encryption, return the value itself
  //   return value;
  // }
}
// var hw = encrypt(new Buffer("NAM_DEP_TRAI_28", "utf8"))
// outputs hello world
// console.log(hw.toString());
// console.log(decrypt(hw).toString('utf8'));
aesEncrypt("NAM_DEP_TRAI_28");
aesDecrypt("788b395a68ec33f0ff10d2a790c6c235");
// aesDecrypt("1bddc75575ea788075fe18538d8e665a")