在节点red中从流或全局变量设置"encrypt node“的密钥

const crypto = require('crypto');

// 生成密钥
const key = crypto.randomBytes(32); // 32字节（256位）的密钥

// 加密数据
function encryptData(data) {
  const iv = crypto.randomBytes(16); // 初始化向量
  const cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
  let encrypted = cipher.update(data, 'utf8', 'hex');
  encrypted += cipher.final('hex');
  return { encryptedData: encrypted, iv: iv.toString('hex') };
}

// 解密数据
function decryptData(encryptedData, iv) {
  const decipher = crypto.createDecipheriv('aes-256-c6', key, Buffer.from(iv, 'hex'));
  let decrypted = decipher.update(encryptedData, 'hex', 'utf8');
  decrypted += decipher.final('utf8');
  return decrypted;
}

// 示例数据
const data = 'Hello, World!';
const { encryptedData, iv } = encryptData(data);
console.log('Encrypted Data:', encryptedData);
console.log('IV:', iv);

const decryptedData = decryptData(encryptedData, iv);
console.log('Decrypted Data:', decryptedData);