StaticIvDecrypt.java

package testcode.crypto.iv;

import testcode.util.HexUtil;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class StaticIvDecrypt {

    public static void decrypt(String message,SecretKey secretKey, byte[] iv) throws Exception {
        //IV
        IvParameterSpec ivSpec = new IvParameterSpec(iv);

        //Encrypt
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
        cipher.update(message.getBytes());

        byte[] data = cipher.doFinal();
        System.out.println(HexUtil.toString(data));
    }
}