如何使用jmeter处理AES 256加密？

import javax.crypto.Cipher
import javax.crypto.KeyGenerator
import javax.crypto.SecretKey
import javax.crypto.spec.SecretKeySpec
import javax.crypto.spec.IvParameterSpec
import org.apache.commons.codec.binary.Base64

// AES 256 加密函数
def encrypt(String plainText, String key) {
    byte[] clean = plainText.getBytes()

    // 生成随机 IV
    byte[] iv = new byte[16]
    new SecureRandom().nextBytes(iv)
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv)

    // 创建密钥
    SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES")

    // 创建 Cipher 实例并初始化
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
    cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec)

    // 加密
    byte[] encrypted = cipher.doFinal(clean)

    // 将 IV 和加密后的数据一起返回
    byte[] encryptedIVAndText = new byte[iv.length + encrypted.length]
    System.arraycopy(iv, 0, encryptedIVAndText, 0, iv.length)
    System.arraycopy(encrypted, 0, encryptedIVAndText, iv.length, encrypted.length)

    return Base64.encodeBase64String(encryptedIVAndText)
}

// 示例使用
String plainText = "Hello, JMeter!"
String key = "12345678901234567890123456789012" // 32 字节密钥
String encryptedText = encrypt(plainText, key)

log.info("Encrypted Text: " + encryptedText)

import javax.crypto.Cipher
import javax.crypto.spec.SecretKeySpec
import javax.crypto.spec.IvParameterSpec
import org.apache.commons.codec.binary.Base64

// AES 256 解密函数
def decrypt(String encryptedText, String key) {
    byte[] encryptedIvTextBytes = Base64.decodeBase64(encryptedText)
    byte[] iv = new byte[16]
    System.arraycopy(encryptedIvTextBytes, 0, iv, 0, iv.length)
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv)

    int encryptedSize = encryptedIvTextBytes.length - iv.length
    byte[] encryptedBytes = new byte[encryptedSize]
    System.arraycopy(encryptedIvTextBytes, iv.length, encryptedBytes, 0, encryptedSize)

    SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES")

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
    cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec)

    byte[] decrypted = cipher.doFinal(encryptedBytes)

    return new String(decrypted)
}

// 示例使用
String encryptedText = "YOUR_ENCRYPTED_TEXT_HERE"
String key = "12345678901234567890123456789012" // 32 字节密钥
String decryptedText = decrypt(encryptedText, key)

log.info("Decrypted Text: " + decryptedText)