NodeJS AES 256 암복호화 코드

회사에서 서버 개발을 하다가, 모바일 API 전문 암호화 요구사항이 있어서 AES256 암호화 및 복호화 코드를 만들고 사용하고 있다. 코드는 다음과 같다 (Typescript 사용 중).

 

import * as Crypto from 'crypto';

/**
 * AES Algorithm Based Data Encrypt Function
 * @param secretKey -  Encrypt Key
 * @param plainText - The Data Of To Be Encrypt
 */
export const encryptWithAES256 = (secretKey: string, plainText: string): string => {
  const secretKeyToByteArray: Buffer = Buffer.from(secretKey, 'utf8');
  const ivParameter: Buffer = Buffer.from(secretKey.slice(0, 16));
  const cipher: Crypto.Cipher = Crypto.createCipheriv('aes-256-cbc', secretKeyToByteArray, ivParameter);
  let encryptedValue: string = cipher.update(plainText, 'utf8', 'base64');
  encryptedValue += cipher.final('base64');
  return encryptedValue;
};

/**
 * AES Algorithms Based Data Decrypt Function
 * @param secretKey - Decrypt Key
 * @param encryptedText - The Data To Decrypted
 */
export const decryptWithAES256 = (secretKey: string, encryptedText: string): string => {
  const secretKeyToBufferArray: Buffer = Buffer.from(secretKey, 'utf8');
  const ivParameter: Buffer = Buffer.from(secretKey.slice(0, 16));
  const cipher: Crypto.Decipher = Crypto.createDecipheriv('aes-256-cbc', secretKeyToBufferArray, ivParameter);
  let decryptedValue: string = cipher.update(encryptedText, 'base64', 'utf8');
  decryptedValue += cipher.final('utf8');
  return decryptedValue;
};