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SpringBoot add XSS Encode for JSON Dto

OWASP Java 2017-02-19 Release 一版小更新就順便把它加進來 SpringBoot 用來過濾 Json 中的非法字元。

非 Json 的自己每一個變數都要自己加

先加入依賴

<dependency>
    <groupId>org.owasp.encoder</groupId>
    <artifactId>encoder</artifactId>
    <version>1.2.1</version>
</dependency>

訂製所有 Stirng 型態的反序列功能

StringDeserializerXSSCharacterEscape.java

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.ContextualDeserializer;
import org.owasp.encoder.Encode;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class StringDeserializerEscapeXSSCharacter extends JsonDeserializer<String> implements ContextualDeserializer {

    private List<String> noEscapeList = new ArrayList<>();

    @Override
    public String deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
        String data = null;
        if (null != jsonParser.getText()) {
            if (noEscapeList.contains(jsonParser.getCurrentValue().getClass().getName() + "." + jsonParser.getCurrentName())) {
                data = jsonParser.getText();
            } else {
                data = Encode.forHtml(jsonParser.getText());
            }
        }
        return data;
    }

    @Override
    public JsonDeserializer<?> createContextual(DeserializationContext deserializationContext, BeanProperty beanProperty) throws JsonMappingException {
        System.out.println("BeanProperty1 " + beanProperty.getMetadata()); // com.fasterxml.jackson.databind.PropertyMetadata@6314f57f

        System.out.println("BeanProperty2 " + beanProperty.getFullName()); // username

        System.out.println("BeanProperty3 " + beanProperty.getType()); // [simple type, class java.lang.String]

        System.out.println("BeanProperty4 " + beanProperty.getName()); // username

        System.out.println("BeanProperty5 " + beanProperty.getMember()); // [method com.pousheng.marketingactivity.admin.TestDto#setUsername(1 params)]

        System.out.println("BeanProperty5.1 " + beanProperty.getMember().getDeclaringClass()); // class com.pousheng.marketingactivity.admin.TestDto

        System.out.println("BeanProperty5.2 " + beanProperty.getMember().getDeclaringClass().getName()); // com.pousheng.marketingactivity.admin.TestDto

        System.out.println("BeanProperty5.3 " + beanProperty.getMember().getName()); // setUsername

        System.out.println("BeanProperty5.4 " + beanProperty.getMember().getAnnotated()); // public void com.pousheng.marketingactivity.admin.TestDto.setUsername(java.lang.String)

        System.out.println("BeanProperty5.5 " + beanProperty.getMember().getTypeContext()); // [AnnotedClass com.pousheng.marketingactivity.admin.TestDto]

        System.out.println("BeanProperty6 " + beanProperty.getWrapperName()); // null


        if (null != beanProperty) {
            NoEscapeXSSCharacter xssAnnotation = beanProperty.getAnnotation(NoEscapeXSSCharacter.class);
            if (null != xssAnnotation) {
                noEscapeList.add(beanProperty.getMember().getDeclaringClass().getName() + "." + beanProperty.getName());
            }
        }
        return this;
    }
}

然後既然要 Encode 非法，自然有需求某些不要 Encode 掉，比如說網頁編輯器的東西

NoEscapeXSSCharacter.java

import com.fasterxml.jackson.annotation.JacksonAnnotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.FIELD, ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotation // important so that it will get included!

public @interface NoEscapeXSSCharacter {
}

配置

ActivityConfig.java

@Slf4j
@Configuration
public class ActivityConfig {
    @Autowired
    private Environment environment;
    @Autowired
    private MarketingActivityAdminProperties marketingActivityAdminProperties;

    @Autowired
    public void configeJackson(ObjectMapper objectMapper) {
        SimpleModule module = new SimpleModule();
        module.addDeserializer(String.class, new StringDeserializerXSSCharacterEscape());
        objectMapper.registerModule(module);
    }
}

範例Dto

TestDto.java

@Data
public class TestDto {
    private Long id;
    @NoEscapeXSSCharacter
    private String username;
    private String name;
}

測試一下

@Autowired
private ObjectMapper mapper;
    
TestDto testDto = mapper.readValue("{/"id/":/"5/",/"username/":/"<script>alert('好的');</script>/",/"name/":/"<script>alert('好的');</script>/"}", TestDto.class);
System.out.println(testDto);

結果

TestDto(id=5, username=<script>alert('好的');</script>, name=<script>alert('好的');</script>)

參考資料

http://owasp.github.io/owasp-java-encoder/

https://github.com/OWASP/owasp-java-encoder

← Springboot multipart max-file-size Exception

原文 http://samchu.logdown.com/posts/3493699-springboot-add-xss-encode-for-json-dto

正文到此结束

所属分类：编程技术 Spring

本文标签： java tar parse Property spring HTML ACE js App http https 需求 core springboot git GitHub list id ip IDE value IO 配置 XML mapper tab map json bean
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