import javax.crypto.Cipher
import javax.crypto.KeyGenerator
import java.security.Key


String input = "This is PlainText!"

println "==>> Plain text: ${input} <<=="

String algorithm = "DESede"
Cipher cipher = Cipher.getInstance(algorithm)
Key generatedKey = KeyGenerator.getInstance(algorithm).generateKey()
String encodedGeneratedKey = generatedKey.encoded.encodeBase64()

println "==>> Base64 encoded symkey: ${encodedGeneratedKey} <<=="

cipher.init(Cipher.ENCRYPT_MODE, generatedKey)
byte[] cipherText = cipher.doFinal(input.bytes)

println "==>> Ciphertext: ${new String(cipherText)} <<=="

cipher.init(Cipher.DECRYPT_MODE, generatedKey)
String decrypted = new String(cipher.doFinal(cipherText))

println "==>> Decrypted text: ${decrypted} <<=="

assert input == decrypted