AES128CBC加密模式(工具类和源码)

AES128CBC加密模式

参考链接

https://www.cnblogs.com/better-farther-world2099/p/13293291.html

实例代码

public static void main(String[] args) throws Exception{
        List<Dish> list=new ArrayList<>();
        Dish dish=new Dish();
        dish.setId(66L);
        dish.setDescription("9999");
        list.add(dish);
        System.out.println("加密前列表元素");
        System.out.println(list);
        String jsonStr = JSONUtil.toJsonStr(list);
        System.out.println("json串为：");
        System.out.println(jsonStr);

        String encryptAES = AESHelper.encryptAES(jsonStr);
        System.out.println("加密后串");
        System.out.println(encryptAES);

        System.out.println("解密后串");
        String decryptAES = AESHelper.decryptAES(encryptAES);
        System.out.println(decryptAES);

        List<Dish> dishes = JSONUtil.toList(decryptAES, Dish.class);
        System.out.println("解密后实体类");
        dishes.stream().forEach(System.out::println);
    }
}

加密工具类，这里头封装了aes加密解密以及base64

public class AESHelper {

    /*
     * 加密用的Key 可以用26个字母和数字组成 使用AES-128-CBC加密模式，key需要为16位。
     */
    private static final String key="hj7x89H$yuBI0456";
    private static final String iv ="NIfb&95GUY86Gfgh";

    public static String encryptAES(String data) throws Exception {
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();
            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;

            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }

            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());  // CBC模式，需要一个向量iv，可增加加密算法的强度

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);

            return AESHelper.encode(encrypted).trim(); // BASE64做转码。

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String decryptAES(String data) throws Exception {
        try
        {
            byte[] encrypted1 = AESHelper.decode(data);//先用base64解密

            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original);
            return originalString.trim();
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 编码
     * @param byteArray
     * @return
     */
    public static String encode(byte[] byteArray) {
        return new String(new Base64().encode(byteArray));
    }

    /**
     * 解码
     * @param base64EncodedString
     * @return
     */
    public static byte[] decode(String base64EncodedString) {
        return new Base64().decode(base64EncodedString);
    }

}