AESCipher.ts

import crypto from 'crypto';

export default class AESCipher {
  #key: Buffer;

  constructor(key: string) {
      const hash = crypto.createHash('sha256');
      hash.update(key);
      this.#key = hash.digest();
  }

  decrypt(encrypt: string) {
      const encryptBuffer = Buffer.from(encrypt, 'base64');
      const decipher = crypto.createDecipheriv('aes-256-cbc', this.#key, encryptBuffer.slice(0, 16));
      let decrypted = decipher.update(encryptBuffer.slice(16).toString('hex'), 'hex', 'utf8');
      decrypted += decipher.final('utf8');
      return decrypted;
  }
}