/**
 * 前后端请求加解密工具
 *
 * @Description
 * @Author xingzhi.lv
 * @Version 1.0
 * @Date 2021/7/2 15:36
 */
public class RequestAESUtils {
    private static final String ENCRYPT_TYPE = "AES";
    private static final String CIPHER_MODEL = "AES/ECB/PKCS5Padding";

    /**
     * 初始化加密
     *
     * @return
     * @throws Exception
     */
    private static Cipher createAesCipher() throws Exception {
        return Cipher.getInstance(CIPHER_MODEL);
    }

    /**
     * AES方式加密
     * Base64输出
     *
     * @param content
     * @return
     * @throws Exception
     */
    public static String encryptByAES(String content, String key) throws Exception {
        Cipher cipher = createAesCipher();
        KeyGenerator keyGenerator = KeyGenerator.getInstance(ENCRYPT_TYPE);
        keyGenerator.init(128, new SecureRandom(key.getBytes()));
        SecretKeySpec secretKeySpec = new SecretKeySpec(Arrays.copyOf(key.getBytes(StandardCharsets.UTF_8), 16), ENCRYPT_TYPE);
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
        byte[] bytes = cipher.doFinal(content.getBytes());
        // 对字节数组加密生成字符串
        BASE64Encoder base64encoder = new BASE64Encoder();
        String result = base64encoder.encode(bytes);
        return result;
    }

    /**
     * AES方式解密
     * Base64输入
     *
     * @param content
     * @return
     * @throws Exception
     */
    public static String decryptByAes(String content, String key) throws Exception {
        // 对字符串解密形成数组-> 再转为对应编码字符串
        BASE64Decoder dencode = new BASE64Decoder();//创建解码对象
        byte[] bytes = dencode.decodeBuffer(content);//得到字节数组
        Cipher cipher = createAesCipher();
        KeyGenerator keyGenerator = KeyGenerator.getInstance(ENCRYPT_TYPE);
        keyGenerator.init(128, new SecureRandom(key.getBytes()));
        SecretKeySpec secretKeySpec = new SecretKeySpec(Arrays.copyOf(key.getBytes(StandardCharsets.UTF_8), 16), ENCRYPT_TYPE);
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
        byte[] resultDecryptByte = cipher.doFinal(bytes);
        return new String(resultDecryptByte);
    }

//    public static void main(String[] args) throws Exception {
//        String encryContent = RequestAESUtils.encryptByAES("138", "0000000000000000");
//        System.out.println(encryContent);
//        String content = RequestAESUtils.decryptByAes(encryContent, "0000000000000000");
//        System.out.println(content);
//        System.out.println(RequestAESUtils.decryptByAes("1BUqgKqSChvYM6xwB5wIzA==", "0000000000000000"));
//    }

}