クロスサイトリクエストフォージェリ (CSRF)

import org.springframework.security.config.annotation.web.invoke

@Configuration
@EnableWebSecurity
class SecurityConfig {

    @Bean
    open fun securityFilterChain(http: HttpSecurity): SecurityFilterChain {
        val requestHandler = XorCsrfTokenRequestAttributeHandler()
        // set the name of the attribute the CsrfToken will be populated on
        requestHandler.setCsrfRequestAttributeName(null)
        http {
            // ...
            csrf {
                csrfTokenRequestHandler = requestHandler
            }
        }
        return http.build()
    }
}

<http>
	<!-- ... -->
	<csrf request-handler-ref="requestHandler"/>
</http>
<b:bean id="requestHandler"
	class="org.springframework.security.web.csrf.CsrfTokenRequestAttributeHandler">
	<b:property name="csrfRequestAttributeName">
		<b:null/>
	</b:property>
</b:bean>

import org.springframework.security.config.annotation.web.invoke

@Configuration
@EnableWebSecurity
class SecurityConfig {

    @Bean
    open fun securityFilterChain(http: HttpSecurity): SecurityFilterChain {
        http {
            // ...
            exceptionHandling {
                accessDeniedPage = "/access-denied"
            }
        }
        return http.build()
    }
}

<http>
	<!-- ... -->
	<access-denied-handler error-page="/access-denied"/>
</http>

import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.*
import org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.*
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*
import org.springframework.test.web.servlet.result.MockMvcResultMatchers.*

@ExtendWith(SpringExtension::class)
@ContextConfiguration(classes = [SecurityConfig::class])
@WebAppConfiguration
class CsrfTests {
	private lateinit var mockMvc: MockMvc

	@BeforeEach
	fun setUp(applicationContext: WebApplicationContext) {
		mockMvc = MockMvcBuilders.webAppContextSetup(applicationContext)
			.apply<DefaultMockMvcBuilder>(springSecurity())
			.build()
	}

	@Test
	fun loginWhenValidCsrfTokenThenSuccess() {
		mockMvc.perform(post("/login").with(csrf())
				.accept(MediaType.TEXT_HTML)
				.param("username", "user")
				.param("password", "password"))
			.andExpect(status().is3xxRedirection)
			.andExpect(header().string(HttpHeaders.LOCATION, "/"))
	}

	@Test
	fun loginWhenInvalidCsrfTokenThenForbidden() {
		mockMvc.perform(post("/login").with(csrf().useInvalidToken())
				.accept(MediaType.TEXT_HTML)
				.param("username", "user")
				.param("password", "password"))
			.andExpect(status().isForbidden)
	}

	@Test
	fun loginWhenMissingCsrfTokenThenForbidden() {
		mockMvc.perform(post("/login")
				.accept(MediaType.TEXT_HTML)
				.param("username", "user")
				.param("password", "password"))
			.andExpect(status().isForbidden)
	}

	@Test
	@WithMockUser
	@Throws(Exception::class)
	fun logoutWhenValidCsrfTokenThenSuccess() {
		mockMvc.perform(post("/logout").with(csrf())
				.accept(MediaType.TEXT_HTML))
			.andExpect(status().is3xxRedirection)
			.andExpect(header().string(HttpHeaders.LOCATION, "/login?logout"))
	}
}

import org.springframework.security.config.annotation.web.invoke

@Configuration
@EnableWebSecurity
class SecurityConfig {

    @Bean
    open fun securityFilterChain(http: HttpSecurity): SecurityFilterChain {
        http {
            // ...
            csrf {
                ignoringRequestMatchers("/api/*")
            }
        }
        return http.build()
    }
}

<http>
	<!-- ... -->
	<csrf request-matcher-ref="csrfMatcher"/>
</http>
<b:bean id="csrfMatcher"
    class="org.springframework.security.web.util.matcher.AndRequestMatcher">
    <b:constructor-arg value="#{T(org.springframework.security.web.csrf.CsrfFilter).DEFAULT_CSRF_MATCHER}"/>
    <b:constructor-arg>
        <b:bean class="org.springframework.security.web.util.matcher.NegatedRequestMatcher">
            <b:bean class="org.springframework.security.web.util.matcher.AntPathRequestMatcher">
                <b:constructor-arg value="/api/*"/>
            </b:bean>
        </b:bean>
    </b:constructor-arg>
</b:bean>

import org.springframework.security.config.annotation.web.invoke

@Configuration
@EnableWebSecurity
class SecurityConfig {

    @Bean
    open fun securityFilterChain(http: HttpSecurity): SecurityFilterChain {
        http {
            // ...
            csrf {
                disable()
            }
        }
        return http.build()
    }
}

<http>
	<!-- ... -->
	<csrf disabled="true"/>
</http>