springboot中request和response的加解密實(shí)現(xiàn)代碼

更新時間：2022年06月08日 08:28:07 作者：ldcaws

這篇文章主要介紹了springboot中request和response的加解密實(shí)現(xiàn),在springboot中提供了RequestBodyAdviceAdapter和ResponseBodyAdvice，利用這兩個工具可以非常方便的對請求和響應(yīng)進(jìn)行預(yù)處理，需要的朋友可以參考下

1、新建一個springboot工程，pom依賴如下

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

2、自定義加密、解密的注解

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Encrypt {
}
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.PARAMETER})
public @interface Decrypt {
}

其中加密注解放在方法上，解密注解可以放在方法上，也可以放在參數(shù)上。

3、加密算法

定義一個加密工具類，加密算法分為對稱加密和非對稱加密，本次使用java自帶的Ciphor來實(shí)現(xiàn)對稱加密，使用AES算法，如下

public class AESUtils {
    private static final String AES_ALGORITHM = "AES/ECB/PKCS5Padding";
    private static final String key = "1234567890abcdef";
    /**
     * 獲取 cipher
     * @param key
     * @param model
     * @return
     * @throws Exception
     */
    private static Cipher getCipher(byte[] key, int model) throws Exception {
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
        cipher.init(model, secretKeySpec);
        return cipher;
    }
    /**
     * AES加密
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static String encrypt(byte[] data, byte[] key) throws Exception {
        Cipher cipher = getCipher(key, Cipher.ENCRYPT_MODE);
        return Base64.getEncoder().encodeToString(cipher.doFinal(data));
    }
    /**
     * AES解密
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
        Cipher cipher = getCipher(key, Cipher.DECRYPT_MODE);
        return cipher.doFinal(Base64.getDecoder().decode(data));
    }
}

其中加密后的數(shù)據(jù)使用Base64算法進(jìn)行編碼，獲取可讀字符串；解密的輸入也是一個Base64編碼之后的字符串，先進(jìn)行解碼再進(jìn)行解密。

4、對請求數(shù)據(jù)進(jìn)行解密處理

@EnableConfigurationProperties(KeyProperties.class)
@ControllerAdvice
public class DecryptRequest extends RequestBodyAdviceAdapter {

    @Autowired
    private KeyProperties keyProperties;

    /**
     * 該方法用于判斷當(dāng)前請求，是否要執(zhí)行beforeBodyRead方法
     *
     * @param methodParameter handler方法的參數(shù)對象
     * @param targetType      handler方法的參數(shù)類型
     * @param converterType   將會使用到的Http消息轉(zhuǎn)換器類類型
     * @return 返回true則會執(zhí)行beforeBodyRead
     */
    @Override
    public boolean supports(MethodParameter methodParameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
        return methodParameter.hasMethodAnnotation(Decrypt.class) || methodParameter.hasParameterAnnotation(Decrypt.class);
    }

    /**
     * 在Http消息轉(zhuǎn)換器執(zhí)轉(zhuǎn)換，之前執(zhí)行
     * @param inputMessage
     * @param parameter
     * @param targetType
     * @param converterType
     * @return 返回 一個自定義的HttpInputMessage
     * @throws IOException
     */
    @Override
    public HttpInputMessage beforeBodyRead(final HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) throws IOException {
        byte[] body = new byte[inputMessage.getBody().available()];
        inputMessage.getBody().read(body);
        try {
            byte[] keyBytes = keyProperties.getKey().getBytes();
            byte[] decrypt = AESUtils.decrypt(body, keyBytes);
            final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(decrypt);
            return new HttpInputMessage() {
                @Override
                public InputStream getBody() throws IOException {
                    return byteArrayInputStream;
                }

                @Override
                public HttpHeaders getHeaders() {
                    return inputMessage.getHeaders();
                }
            };
        } catch (Exception e) {
            e.printStackTrace();
        }
        return super.beforeBodyRead(inputMessage, parameter, targetType, converterType);
    }
}

5、對響應(yīng)數(shù)據(jù)進(jìn)行加密處理

@EnableConfigurationProperties(KeyProperties.class)
@ControllerAdvice
public class EncryptResponse implements ResponseBodyAdvice<RespBean> {

    private ObjectMapper objectMapper = new ObjectMapper();

    @Autowired
    private KeyProperties keyProperties;

    /**
     * 該方法用于判斷當(dāng)前請求的返回值，是否要執(zhí)行beforeBodyWrite方法
     *
     * @param methodParameter handler方法的參數(shù)對象
     * @param converterType   將會使用到的Http消息轉(zhuǎn)換器類類型
     * @return 返回true則會執(zhí)行beforeBodyWrite
     */
    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> converterType) {
        return methodParameter.hasMethodAnnotation(Encrypt.class);
    }

    /**
     * 在Http消息轉(zhuǎn)換器執(zhí)轉(zhuǎn)換，之前執(zhí)行
     * @param body
     * @param returnType
     * @param selectedContentType
     * @param selectedConverterType
     * @param request
     * @param response
     * @return 返回 一個自定義的HttpInputMessage，可以為null，表示沒有任何響應(yīng)
     */
    @Override
    public RespBean beforeBodyWrite(RespBean body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        byte[] keyBytes = keyProperties.getKey().getBytes();
        try {
            if (body.getMsg() != null) {
                body.setMsg(AESUtils.encrypt(body.getMsg().getBytes(), keyBytes));
            }
            if (body.getObj() != null) {
                body.setObj(AESUtils.encrypt(objectMapper.writeValueAsBytes(body.getObj()), keyBytes));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return body;
    }
}

6、加解密的key的配置類，從配置文件中讀取

@ConfigurationProperties(prefix = "spring.encrypt")
public class KeyProperties {

    private final static String DEFAULT_KEY = "1234567890abcdef";
    private String key = DEFAULT_KEY;

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }
}

7、測試

application中的key配置

spring.encrypt.key=1234567890abcdef

	@GetMapping("/user")
    @Encrypt
    public RespBean getUser() {
        User user = new User();
        user.setId(1L);
        user.setUsername("caocao");
        return RespBean.ok("ok", user);
    }

    @PostMapping("/user")
    public RespBean addUser(@RequestBody @Decrypt User user) {
        System.out.println("user = " + user);
        return RespBean.ok("ok", user);
    }

測試結(jié)果

在這里插入圖片描述