對稱加密算法AES

AES jdk 加密

所需jar 在前一篇DES加密中

package encrypt;

import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;


public class AES {
    
    private static String src = "不想打老虎了";
    
    public static void main(String[] args) {
        jdkAES();
    }

    
    public static void jdkAES(){
        //生成key
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
            keyGenerator.init(new SecureRandom());
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] keyBytes = secretKey.getEncoded();
            
            
        //key轉換
            Key key = new SecretKeySpec(keyBytes, "AES");
            
        //加密
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] result = cipher.doFinal(src.getBytes());
            System.out.println("jdk AES encrypt:" + Base64.encodeBase64String(result));
            
        //解密
            cipher.init(Cipher.DECRYPT_MODE, key);
            result = cipher.doFinal(result);
            System.out.println("jdk AES decrypt:" + new String(result));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
    }
    
}