SpringSecurity의 CSRF 공격 처리 방법 소개

<!-- 模板引擎 freemarker -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<!-- Security (只使用CSRF部分) -->
<dependency>
  <groupId>org.springframework.security</groupId>
  <artifactId>spring-security-web</artifactId>
</dependency>

@SpringBootApplication
public class Application {

  public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
  }
  
  /**
   * 配置CSRF过滤器
   *
   * @return {@link org.springframework.boot.web.servlet.FilterRegistrationBean}
   */
  @Bean
  public FilterRegistrationBean<CsrfFilter> csrfFilter() {
    FilterRegistrationBean<CsrfFilter> registration = new FilterRegistrationBean<>();
    registration.setFilter(new CsrfFilter(new HttpSessionCsrfTokenRepository()));
    registration.addUrlPatterns("/*");
    registration.setName("csrfFilter");
    return registration;
  }
}

<input name="${(_csrf.parameterName)!}" value="${(_csrf.token)!}" type="hidden" />

xhr.setRequestHeader("${_csrf.headerName}", "${_csrf.token}");