spring-security/docs/modules/ROOT/pages/migration.adoc

[[migration]]
= Migrating to 6.0

The Spring Security team has prepared the 5.8 release to simplify upgrading to Spring Security 6.0.
Use 5.8 and the steps below to minimize changes when
ifdef::spring-security-version[]
xref:6.0.0@migration.adoc[updating to 6.0]
endif::[]
ifndef::spring-security-version[]
updating to 6.0
endif::[]
.

== Servlet

=== Defer Loading CsrfToken

In Spring Security 5, the default behavior is that the `CsrfToken` will be loaded on every request.
This means that in a typical setup, the `HttpSession` must be read for every request even if it is unnecessary.

In Spring Security 6, the default is that the lookup of the `CsrfToken` will be deferred until it is needed.

To opt into the new Spring Security 6 default, the following configuration can be used.

.Defer Loading `CsrfToken`
====
.Java
[source,java,role="primary"]
----
@Bean
DefaultSecurityFilterChain springSecurity(HttpSecurity http) throws Exception {
	CsrfTokenRequestAttributeHandler requestHandler = new CsrfTokenRequestAttributeHandler();
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName("_csrf");
	http
		// ...
		.csrf((csrf) -> csrf
			.csrfTokenRequestHandler(requestHandler)
		);
	return http.build();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
open fun springSecurity(http: HttpSecurity): SecurityFilterChain {
	val requestHandler = CsrfTokenRequestAttributeHandler()
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName("_csrf")
	http {
		csrf {
			csrfTokenRequestHandler = requestHandler
		}
	}
	return http.build()
}
----

.XML
[source,xml,role="secondary"]
----
<http>
	<!-- ... -->
	<csrf request-handler-ref="requestHandler"/>
</http>
<b:bean id="requestHandler"
	class="org.springframework.security.web.csrf.CsrfTokenRequestAttributeHandler"
	p:csrfRequestAttributeName="_csrf"/>
----
====

If this breaks your application, then you can explicitly opt into the 5.8 defaults using the following configuration:

.Explicit Configure `CsrfToken` with 5.8 Defaults
====
.Java
[source,java,role="primary"]
----
@Bean
DefaultSecurityFilterChain springSecurity(HttpSecurity http) throws Exception {
	CsrfTokenRequestAttributeHandler requestHandler = new CsrfTokenRequestAttributeHandler();
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName(null);
	http
		// ...
		.csrf((csrf) -> csrf
			.csrfTokenRequestHandler(requestHandler)
		);
	return http.build();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
open fun springSecurity(http: HttpSecurity): SecurityFilterChain {
	val requestHandler = CsrfTokenRequestAttributeHandler()
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName(null)
	http {
		csrf {
			csrfTokenRequestHandler = requestHandler
		}
	}
	return http.build()
}
----

.XML
[source,xml,role="secondary"]
----
<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>
----
====

=== CSRF BREACH Protection

If the steps for <<Defer Loading CsrfToken>> work for you, then you can also opt into Spring Security 6's default support for BREACH protection of the `CsrfToken` using the following configuration:

.`CsrfToken` BREACH Protection
====
.Java
[source,java,role="primary"]
----
@Bean
DefaultSecurityFilterChain springSecurity(HttpSecurity http) throws Exception {
	XorCsrfTokenRequestAttributeHandler requestHandler = new XorCsrfTokenRequestAttributeHandler();
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName("_csrf");
	http
		// ...
		.csrf((csrf) -> csrf
			.csrfTokenRequestHandler(requestHandler)
		);
	return http.build();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
open fun springSecurity(http: HttpSecurity): SecurityFilterChain {
	val requestHandler = XorCsrfTokenRequestAttributeHandler()
	// set the name of the attribute the CsrfToken will be populated on
	requestHandler.setCsrfRequestAttributeName("_csrf")
	http {
		csrf {
			csrfTokenRequestHandler = requestHandler
		}
	}
	return http.build()
}
----

.XML
[source,xml,role="secondary"]
----
<http>
	<!-- ... -->
	<csrf request-handler-ref="requestHandler"/>
</http>
<b:bean id="requestHandler"
	class="org.springframework.security.web.csrf.XorCsrfTokenRequestAttributeHandler"
	p:csrfRequestAttributeName="_csrf"/>
----
====

=== Explicit Save SecurityContextRepository

In Spring Security 5, the default behavior is for the xref:servlet/authentication/architecture.adoc#servlet-authentication-securitycontext[`SecurityContext`] to automatically be saved to the xref:servlet/authentication/persistence.adoc#securitycontextrepository[`SecurityContextRepository`] using the xref:servlet/authentication/persistence.adoc#securitycontextpersistencefilter[`SecurityContextPersistenceFilter`].
Saving must be done just prior to the `HttpServletResponse` being committed and just before `SecurityContextPersistenceFilter`.
Unfortunately, automatic persistence of the `SecurityContext` can surprise users when it is done prior to the request completing (i.e. just prior to committing the `HttpServletResponse`).
It also is complex to keep track of the state to determine if a save is necessary causing unnecessary writes to the `SecurityContextRepository` (i.e. `HttpSession`) at times.

In Spring Security 6, the default behavior is that the xref:servlet/authentication/persistence.adoc#securitycontextholderfilter[`SecurityContextHolderFilter`] will only read the `SecurityContext` from  `SecurityContextRepository` and populate it in the `SecurityContextHolder`.
Users now must explicitly save the `SecurityContext` with the `SecurityContextRepository` if they want the `SecurityContext` to persist between requests.
This removes ambiguity and improves performance by only requiring writing to the `SecurityContextRepository` (i.e. `HttpSession`) when it is necessary.

To opt into the new Spring Security 6 default, the following configuration can be used.

include::partial$servlet/architecture/security-context-explicit.adoc[]

=== Deprecation in SecurityContextRepository

In Spring Security 5.7, a new method was added to xref:servlet/authentication/persistence.adoc#securitycontextrepository[`SecurityContextRepository`] with the signature:

    Supplier<SecurityContext> loadContext(HttpServletRequest request)

With the addition of xref:servlet/authentication/persistence.adoc#delegatingsecuritycontextrepository[`DelegatingSecurityContextRepository`] in Spring Security 5.8, that method was deprecated in favor of a new method with the signature:

    DeferredSecurityContext loadDeferredContext(HttpServletRequest request)

In Spring Security 6, the deprecated method was removed.
If you have implemented `SecurityContextRepository` yourself and added an implementation of the `loadContext(request)` method, you can prepare for Spring Security 6 by removing the implementation of that method and implementing the new method instead.

To get started implementing the new method, use the following example that adapts a `Supplier<SecurityContext>` to provide a `DeferredSecurityContext`:

[NOTE]
====
The adapted `Supplier` should return `null` when no `SecurityContext` is available, which was not the case with the `Supplier` returned from `loadContext(request)`.
====

.Adapt `Supplier<SecurityContext>` to `DeferredSecurityContext`
====
.Java
[source,java,role="primary"]
----
@Override
public DeferredSecurityContext loadDeferredContext(HttpServletRequest request) {
	// Adapt a supplier that returns null when the context is not available
	Supplier<SecurityContext> supplier = () -> getContextOrNull(request);
	SecurityContextHolderStrategy strategy = SecurityContextHolder.getContextHolderStrategy();
	return new DeferredSecurityContext() {
		private SecurityContext securityContext;
		private boolean isGenerated;

		@Override
		public SecurityContext get() {
			if (this.securityContext == null) {
				this.securityContext = supplier.get();
				if (this.securityContext == null) {
					this.securityContext = strategy.createEmptyContext();
					this.isGenerated = true;
				}
			}
			return this.securityContext;
		}

		@Override
		public boolean isGenerated() {
			get();
			return this.isGenerated;
		}
	};
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
override fun loadDeferredContext(request: HttpServletRequest): DeferredSecurityContext {
	// Adapt a supplier that returns null when the context is not available
	val supplier: Supplier<SecurityContext?> = SingletonSupplier.of {
		getContextOrNull(request)
	}
	val strategy = SecurityContextHolder.getContextHolderStrategy()
	return object : DeferredSecurityContext {
		private var securityContext: SecurityContext? = null
		private var isGenerated = false

		override fun get(): SecurityContext {
			if (securityContext == null) {
				securityContext = supplier.get()
					?: strategy.createEmptyContext().also { isGenerated = true }
			}
			return securityContext!!
		}

		override fun isGenerated(): Boolean {
			get()
			return isGenerated
		}
	}
}
----
====

[[requestcache-query-optimization]]
=== Optimize Querying of `RequestCache`

In Spring Security 5, the default behavior is to query the xref:servlet/architecture.adoc#savedrequests[saved request] on every request.
This means that in a typical setup, that in order to use the xref:servlet/architecture.adoc#requestcache[`RequestCache`] the `HttpSession` is queried on every request.

In Spring Security 6, the default is that `RequestCache` will only be queried for a cached request if the HTTP parameter `continue` is defined.
This allows Spring Security to avoid unnecessarily reading the `HttpSession` with the `RequestCache`.

In Spring Security 5 the default is to use `HttpSessionRequestCache` which will be queried for a cached request on every request.
If you are not overriding the defaults (i.e. using `NullRequestCache`), then the following configuration can be used to explicitly opt into the Spring Security 6 behavior in Spring Security 5.8:

include::partial$servlet/architecture/request-cache-continue.adoc[]

=== Use `AuthorizationManager` for Method Security

xref:servlet/authorization/method-security.adoc[Method Security] has been xref:servlet/authorization/method-security.adoc#jc-enable-method-security[simplified] through {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[the `AuthorizationManager` API] and direct use of Spring AOP.

Should you run into trouble with making these changes, note that `@EnableGlobalMethodSecurity`, while deprecated, will not be removed in 6.0, allowing you to opt out by sticking with the old annotation.

[[servlet-replace-globalmethodsecurity-with-methodsecurity]]
==== Replace xref:servlet/authorization/method-security.adoc#jc-enable-global-method-security[global method security] with xref:servlet/authorization/method-security.adoc#jc-enable-method-security[method security]

{security-api-url}org/springframework/security/config/annotation/method/configuration/EnableGlobalMethodSecurity.html[`@EnableGlobalMethodSecurity`] and xref:servlet/appendix/namespace/method-security.adoc#nsa-global-method-security[`<global-method-security>`] are deprecated in favor of {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableMethodSecurity.html[`@EnableMethodSecurity`] and xref:servlet/appendix/namespace/method-security.adoc#nsa-method-security[`<method-security>`], respectively.
The new annotation and XML element activate Spring's xref:servlet/authorization/method-security.adoc#jc-enable-method-security[pre-post annotations] by default and use `AuthorizationManager` internally.

This means that the following two listings are functionally equivalent:

====
.Java
[source,java,role="primary"]
----
@EnableGlobalMethodSecurity(prePostEnabled = true)
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableGlobalMethodSecurity(prePostEnabled = true)
----

.Xml
[source,xml,role="secondary"]
----
<global-method-security pre-post-enabled="true"/>
----
====

and:

====
.Java
[source,java,role="primary"]
----
@EnableMethodSecurity
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableMethodSecurity
----

.Xml
[source,xml,role="secondary"]
----
<method-security/>
----
====

For applications not using the pre-post annotations, make sure to turn it off to avoid activating unwanted behavior.

For example, a listing like:

====
.Java
[source,java,role="primary"]
----
@EnableGlobalMethodSecurity(securedEnabled = true)
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableGlobalMethodSecurity(securedEnabled = true)
----

.Xml
[source,xml,role="secondary"]
----
<global-method-security secured-enabled="true"/>
----
====

should change to:

====
.Java
[source,java,role="primary"]
----
@EnableMethodSecurity(securedEnabled = true, prePostEnabled = false)
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableMethodSecurity(securedEnabled = true, prePostEnabled = false)
----

.Xml
[source,xml,role="secondary"]
----
<method-security secured-enabled="true" pre-post-enabled="false"/>
----
====

[[servlet-replace-permissionevaluator-bean-with-methodsecurityexpression-handler]]
==== Publish a `MethodSecurityExpressionHandler` instead of a `PermissionEvaluator`

`@EnableMethodSecurity` does not pick up a `PermissionEvaluator`.
This helps keep its API simple.

If you have a custom {security-api-url}org/springframework/security/access/PermissionEvaluator.html[`PermissionEvaluator`] `@Bean`, please change it from:

====
.Java
[source,java,role="primary"]
----
@Bean
static PermissionEvaluator permissionEvaluator() {
	// ... your evaluator
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
companion object {
	@Bean
	fun permissionEvaluator(): PermissionEvaluator {
		// ... your evaluator
	}
}
----
====

to:

====
.Java
[source,java,role="primary"]
----
@Bean
static MethodSecurityExpressionHandler expressionHandler() {
	var expressionHandler = new DefaultMethodSecurityExpressionHandler();
	expressionHandler.setPermissionEvaluator(myPermissionEvaluator);
	return expressionHandler;
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
companion object {
	@Bean
	fun expressionHandler(): MethodSecurityExpressionHandler {
		val expressionHandler = DefaultMethodSecurityExpressionHandler
		expressionHandler.setPermissionEvaluator(myPermissionEvaluator)
		return expressionHandler
	}
}
----
====

==== Replace any custom method-security ``AccessDecisionManager``s

Your application may have a custom {security-api-url}org/springframework/security/access/AccessDecisionManager.html[`AccessDecisionManager`] or {security-api-url}org/springframework/security/access/AccessDecisionVoter.html[`AccessDecisionVoter`] arrangement.
The preparation strategy will depend on your reason for each arrangement.
Read on to find the best match for your situation.

===== I use `UnanimousBased`

If your application uses {security-api-url}org/springframework/security/access/vote/UnanimousBased.html[`UnanimousBased`] with the default voters, you likely need do nothing since unanimous-based is the default behavior with {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableMethodSecurity.html[`@EnableMethodSecurity`].

However, if you do discover that you cannot accept the default authorization managers, you can use `AuthorizationManagers.allOf` to compose your own arrangement.
Having done that, please follow the details in the reference manual for xref:servlet/authorization/method-security.adoc#jc-method-security-custom-authorization-manager[adding a custom `AuthorizationManager`].

===== I use `AffirmativeBased`

If your application uses {security-api-url}org/springframework/security/access/vote/AffirmativeBased.html[`AffirmativeBased`], then you can construct an equivalent {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`], like so:

====
.Java
[source,java,role="primary"]
----
AuthorizationManager<MethodInvocation> authorization = AuthorizationManagers.anyOf(
		// ... your list of authorization managers
)
----

.Kotlin
[source,kotlin,role="secondary"]
----
val authorization = AuthorizationManagers.anyOf(
		// ... your list of authorization managers
)
----
====

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/method-security.adoc#jc-method-security-custom-authorization-manager[adding a custom `AuthorizationManager`].

===== I use `ConsensusBased`

There is no framework-provided equivalent for {security-api-url}org/springframework/security/access/vote/ConsensusBased.html[`ConsensusBased`].
In that case, please implement a composite {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] that takes the set of delegate ``AuthorizationManager``s into account.

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/method-security.adoc#jc-method-security-custom-authorization-manager[adding a custom `AuthorizationManager`].

===== I use a custom `AccessDecisionVoter`

You should either change the class to implement {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] or create an adapter.

Without knowing what your custom voter is doing, it is impossible to recommend a general-purpose solution.
By way of example, though, here is what adapting {security-api-url}org/springframework/security/access/SecurityMetadataSource.html[`SecurityMetadataSource`] and {security-api-url}org/springframework/security/access/AccessDecisionVoter.html[`AccessDecisionVoter`] for `@PreAuthorize` would look like:

====
.Java
[source,java,role="primary"]
----
public final class PreAuthorizeAuthorizationManagerAdapter implements AuthorizationManager<MethodInvocation> {
    private final SecurityMetadataSource metadata;
    private final AccessDecisionVoter voter;

    public PreAuthorizeAuthorizationManagerAdapter(MethodSecurityExpressionHandler expressionHandler) {
        ExpressionBasedAnnotationAttributeFactory attributeFactory =
                new ExpressionBasedAnnotationAttributeFactory(expressionHandler);
        this.metadata = new PrePostAnnotationSecurityMetadataSource(attributeFactory);
        ExpressionBasedPreInvocationAdvice expressionAdvice = new ExpressionBasedPreInvocationAdvice();
        expressionAdvice.setExpressionHandler(expressionHandler);
        this.voter = new PreInvocationAuthorizationAdviceVoter(expressionAdvice);
    }

    public AuthorizationDecision check(Supplier<Authentication> authentication, MethodInvocation invocation) {
        List<ConfigAttribute> attributes = this.metadata.getAttributes(invocation, AopUtils.getTargetClass(invocation.getThis()));
        int decision = this.voter.vote(authentication.get(), invocation, attributes);
        if (decision == ACCESS_GRANTED) {
            return new AuthorizationDecision(true);
        }
        if (decision == ACCESS_DENIED) {
            return new AuthorizationDecision(false);
        }
        return null; // abstain
    }
}
----
====

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/method-security.adoc#jc-method-security-custom-authorization-manager[adding a custom `AuthorizationManager`].

===== I use a custom `AfterInvocationManager`

{security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] replaces both {security-api-url}org/springframework/security/access/AccessDecisionManager.html[`AccessDecisionManager`] and  {security-api-url}org/springframework/security/access/intercept/AfterInvocationManager.html[`AfterInvocationManager`].
The difference is that `AuthorizationManager<MethodInvocation>` replaces `AccessDecisionManager` and `AuthorizationManager<MethodInvocationResult>` replaces `AfterInvocationManager`.

Given that, <<_i_use_a_custom_accessdecisionvoter,the same rules apply for adaptation>>, where the goal this time is to implement `AuthorizationManager<MethodInvocationResult>` instead of `AuthorizationManager<MethodInvocation>` and use `AuthorizationManagerAfterMethodInterceptor` instead of `AuthorizationManagerBeforeMethodInterceptor`.

===== I use `RunAsManager`

There is currently https://github.com/spring-projects/spring-security/issues/11331[no replacement for `RunAsManager`] though one is being considered.

It is quite straightforward to adapt a `RunAsManager`, though, to the `AuthorizationManager` API, if needed.

Here is some pseudocode to get you started:

====
.Java
[source,java,role="primary"]
----
public final class RunAsAuthorizationManagerAdapter<T> implements AuthorizationManager<T> {
	private final RunAsManager runAs = new RunAsManagerImpl();
	private final SecurityMetadataSource metadata;
    private final AuthorizationManager<T> authorization;

    // ... constructor

    public AuthorizationDecision check(Supplier<Authentication> authentication, T object) {
		Supplier<Authentication> wrapped = (auth) -> {
			List<ConfigAttribute> attributes = this.metadata.getAttributes(object);
			return this.runAs.buildRunAs(auth, object, attributes);
		};
		return this.authorization.check(wrapped, object);
    }
}
----
====

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/method-security.adoc#jc-method-security-custom-authorization-manager[adding a custom `AuthorizationManager`].

[[servlet-check-for-annotationconfigurationexceptions]]
==== Check for ``AnnotationConfigurationException``s

`@EnableMethodSecurity` and `<method-security>` activate stricter enforcement of Spring Security's non-repeatable or otherwise incompatible annotations.
If after moving to either you see ``AnnotationConfigurationException``s in your logs, follow the instructions in the exception message to clean up your application's method security annotation usage.

=== Use `AuthorizationManager` for Message Security

xref:servlet/integrations/websocket.adoc[Message Security] has been xref:servlet/integrations/websocket.adoc#websocket-configuration[improved] through {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[the `AuthorizationManager` API] and direct use of Spring AOP.

Should you run into trouble with making these changes, you can follow the <<servlet-authorizationmanager-messages-opt-out,opt out steps>> at the end of this section.

==== Ensure all messages have defined authorization rules

The now-deprecated {security-api-url}org/springframework/security/config/annotation/web/socket/AbstractSecurityWebSocketMessageBrokerConfigurer.html[message security support] permits all messages by default.
xref:servlet/integrations/websocket.adoc[The new support] has the stronger default of denying all messages.

To prepare for this, ensure that authorization rules exist are declared for every request.

For example, an application configuration like:

====
.Java
[source,java,role="primary"]
----
@Override
protected void configureInbound(MessageSecurityMetadataSourceRegistry messages) {
    messages
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN");
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
override fun configureInbound(messages: MessageSecurityMetadataSourceRegistry) {
    messages
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
}
----

.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker>
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
</websocket-message-broker>
----
====

should change to:

====
.Java
[source,java,role="primary"]
----
@Override
protected void configureInbound(MessageSecurityMetadataSourceRegistry messages) {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
override fun configureInbound(messages: MessageSecurityMetadataSourceRegistry) {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll()
}
----

.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker>
    <intercept-message type="CONNECT" access="permitAll"/>
    <intercept-message type="DISCONNECT" access="permitAll"/>
    <intercept-message type="UNSUBSCRIBE" access="permitAll"/>
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
    <intercept-message pattern="/**" access="denyAll"/>
</websocket-message-broker>
----
====

==== Add `@EnableWebSocketSecurity`

[NOTE]
====
If you want to have CSRF disabled and you are using Java configuration, the migration steps are slightly different.
Instead of using `@EnableWebSocketSecurity`, you will override the appropriate methods in `WebSocketMessageBrokerConfigurer` yourself.
Please see xref:servlet/integrations/websocket.adoc#websocket-sameorigin-disable[the reference manual] for details about this step.
====

If you are using Java Configuration, add {security-api-url}org/springframework/security/config/annotation/web/socket/EnableWebSocketSecurity.html[`@EnableWebSocketSecurity`] to your application.

For example, you can add it to your websocket security configuration class, like so:

====
.Java
[source,java,role="primary"]
----
@EnableWebSocketSecurity
@Configuration
public class WebSocketSecurityConfig extends AbstractSecurityWebSocketMessageBrokerConfigurer {
	// ...
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableWebSocketSecurity
@Configuration
class WebSocketSecurityConfig: AbstractSecurityWebSocketMessageBrokerConfigurer() {
	// ...
}
----
====

This will make a prototype instance of `MessageMatcherDelegatingAuthorizationManager.Builder` available to encourage configuration by composition instead of extension.

==== Use an `AuthorizationManager<Message<?>>` instance

To start using `AuthorizationManager`, you can set the `use-authorization-manager` attribute in XML or you can publish an `AuthorizationManager<Message<?>>` `@Bean` in Java.

For example, the following application configuration:

====
.Java
[source,java,role="primary"]
----
@Override
protected void configureInbound(MessageSecurityMetadataSourceRegistry messages) {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
override fun configureInbound(messages: MessageSecurityMetadataSourceRegistry) {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll()
}
----

.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker>
    <intercept-message type="CONNECT" access="permitAll"/>
    <intercept-message type="DISCONNECT" access="permitAll"/>
    <intercept-message type="UNSUBSCRIBE" access="permitAll"/>
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
    <intercept-message pattern="/**" access="denyAll"/>
</websocket-message-broker>
----
====

changes to:

====
.Java
[source,java,role="primary"]
----
@Bean
AuthorizationManager<Message<?>> messageSecurity(MessageMatcherDelegatingAuthorizationManager.Builder messages) {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll();
	return messages.build();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
fun messageSecurity(val messages: MessageMatcherDelegatingAuthorizationManager.Builder): AuthorizationManager<Message<?>> {
    messages
        .simpTypeMatchers(CONNECT, DISCONNECT, UNSUBSCRIBE).permitAll()
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        .anyMessage().denyAll()
    return messages.build()
}
----

.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker use-authorization-manager="true">
    <intercept-message type="CONNECT" access="permitAll"/>
    <intercept-message type="DISCONNECT" access="permitAll"/>
    <intercept-message type="UNSUBSCRIBE" access="permitAll"/>
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
    <intercept-message pattern="/**" access="denyAll"/>
</websocket-message-broker>
----
====

==== Stop Implementing `AbstractSecurityWebSocketMessageBrokerConfigurer`

If you are using Java configuration, you can now simply extend `WebSocketMessageBrokerConfigurer`.

For example, if your class that extends `AbstractSecurityWebSocketMessageBrokerConfigurer` is called `WebSocketSecurityConfig`, then:

====
.Java
[source,java,role="primary"]
----
@EnableWebSocketSecurity
@Configuration
public class WebSocketSecurityConfig extends AbstractSecurityWebSocketMessageBrokerConfigurer {
	// ...
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableWebSocketSecurity
@Configuration
class WebSocketSecurityConfig: AbstractSecurityWebSocketMessageBrokerConfigurer() {
	// ...
}
----
====

changes to:

====
.Java
[source,java,role="primary"]
----
@EnableWebSocketSecurity
@Configuration
public class WebSocketSecurityConfig implements WebSocketMessageBrokerConfigurer {
	// ...
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableWebSocketSecurity
@Configuration
class WebSocketSecurityConfig: WebSocketMessageBrokerConfigurer {
	// ...
}
----
====

[[servlet-authorizationmanager-messages-opt-out]]
==== Opt-out Steps

In case you had trouble, take a look at these scenarios for optimal opt out behavior:

===== I cannot declare an authorization rule for all requests

If you are having trouble setting an `anyRequest` authorization rule of `denyAll`, please use {security-api-url}org/springframework/security/messaging/access/intercept/MessageMatcherDelegatingAuthorizationManager.Builder.Constraint.html#permitAll()[`permitAll`] instead, like so:

====
.Java
[source,java,role="primary"]
----
@Bean
AuthorizationManager<Message<?>> messageSecurity(MessageMatcherDelegatingAuthorizationManager.Builder messages) {
    messages
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        // ...
        .anyMessage().permitAll();
	return messages.build();
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
fun messageSecurity(val messages: MessageMatcherDelegatingAuthorizationManager.Builder): AuthorizationManager<Message<?>> {
    messages
        .simpDestMatchers("/user/queue/errors").permitAll()
        .simpDestMatchers("/admin/**").hasRole("ADMIN")
        // ...
        .anyMessage().permitAll();
    return messages.build()
}
----

.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker use-authorization-manager="true">
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
    <!-- ... -->
    <intercept-message pattern="/**" access="permitAll"/>
</websocket-message-broker>
----
====

===== I cannot get CSRF working, need some other `AbstractSecurityWebSocketMessageBrokerConfigurer` feature, or am having trouble with `AuthorizationManager`

In the case of Java, you may continue using `AbstractMessageSecurityWebSocketMessageBrokerConfigurer`.
Even though it is deprecated, it will not be removed in 6.0.

In the case of XML, you can opt out of `AuthorizationManager` by setting `use-authorization-manager="false"`:

====
.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker>
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
</websocket-message-broker>
----
====

to:

====
.Xml
[source,xml,role="secondary"]
----
<websocket-message-broker use-authorization-manager="false">
    <intercept-message pattern="/user/queue/errors" access="permitAll"/>
    <intercept-message pattern="/admin/**" access="hasRole('ADMIN')"/>
</websocket-message-broker>
----
====

=== Use `AuthorizationManager` for Request Security

xref:servlet/authorization/authorize-requests.adoc[HTTP Request Security] has been xref:servlet/authorization/authorize-http-requests.adoc[simplified] through {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[the `AuthorizationManager` API].

Should you run into trouble with making these changes, you can follow the <<servlet-authorizationmanager-requests-opt-out,opt out steps>> at the end of this section.

==== Ensure that all requests have defined authorization rules

In Spring Security 5.8 and earlier, requests with no authorization rule are permitted by default.
It is a stronger security position to deny by default, thus requiring that authorization rules be clearly defined for every endpoint.
As such, in 6.0, Spring Security by default denies any request that is missing an authorization rule.

The simplest way to prepare for this change is to introduce an appropriate {security-api-url}org/springframework/security/config/annotation/web/AbstractRequestMatcherRegistry.html#anyRequest()[`anyRequest`] rule as the last authorization rule.
The recommendation is {security-api-url}org/springframework/security/config/annotation/web/configurers/ExpressionUrlAuthorizationConfigurer.AuthorizedUrl.html#denyAll()[`denyAll`] since that is the implied 6.0 default.

[NOTE]
====
You may already have an `anyRequest` rule defined that you are happy with in which case this step can be skipped.
====

Adding `denyAll` to the end looks like changing:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/app/**", hasRole("APP"))
        // ...
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http once-per-request="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
</http>
----
====

to:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http once-per-request="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>
----
====

If you have already migrated to `authorizeHttpRequests`, the recommended change is the same.

==== Switch to `AuthorizationManager`

To opt in to using `AuthorizationManager`, you can use `authorizeHttpRequests` or xref:servlet/appendix/namespace/http.adoc#nsa-http-use-authorization-manager[`use-authorization-manager`] for Java or XML, respectively.

Change:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http once-per-request="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>
----
====

to:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .shouldFilterAllDispatcherTypes(false)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        shouldFilterAllDispatcherTypes = false
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http filter-all-dispatcher-types="false" use-authorization-manager="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>
----
====

==== Migrate SpEL expressions to `AuthorizationManager`

For authorization rules, Java tends to be easier to test and maintain than SpEL.
As such, `authorizeHttpRequests` does not have a method for declaring a `String` SpEL.

Instead, you can implement your own `AuthorizationManager` implementation or use `WebExpressionAuthorizationManager`.

For completeness, both options will be demonstrated.

First, if you have the following SpEL:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/complicated/**").access("hasRole('ADMIN') || hasAuthority('SCOPE_read')")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/complicated/**", access("hasRole('ADMIN') || hasAuthority('SCOPE_read')"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----
====

Then you can compose your own `AuthorizationManager` with Spring Security authorization primitives like so:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .shouldFilterAllDispatcherTypes(false)
        .mvcMatchers("/complicated/**").access(anyOf(hasRole("ADMIN"), hasAuthority("SCOPE_read"))
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        shouldFilterAllDispatcherTypes = false
        authorize("/complicated/**", access(anyOf(hasRole("ADMIN"), hasAuthority("SCOPE_read"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----
====

Or you can use `WebExpressionAuthorizationManager` in the following way:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/complicated/**").access(
			new WebExpressionAuthorizationManager("hasRole('ADMIN') || hasAuthority('SCOPE_read')")
        )
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/complicated/**", access(
            WebExpressionAuthorizationManager("hasRole('ADMIN') || hasAuthority('SCOPE_read')"))
        )
        // ...
        authorize(anyRequest, denyAll)
    }
}
----
====

==== Switch to filter all dispatcher types

Spring Security 5.8 and earlier only xref:servlet/authorization/architecture.adoc[perform authorization] once per request.
This means that dispatcher types like `FORWARD` and `INCLUDE` that run after `REQUEST` are not secured by default.

It's recommended that Spring Security secure all dispatch types.
As such, in 6.0, Spring Security changes this default.

So, finally, change your authorization rules to filter all dispatcher types.

To do this, change:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .shouldFilterAllDispatcherTypes(false)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        shouldFilterAllDispatcherTypes = false
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http filter-all-dispatcher-types="false" use-authorization-manager="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>
----
====

to:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .shouldFilterAllDispatcherTypes(true)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        shouldFilterAllDispatcherTypes = true
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http filter-all-dispatcher-types="true" use-authorization-manager="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>
----
====

==== Replace any custom filter-security ``AccessDecisionManager``s

Your application may have a custom {security-api-url}org/springframework/security/access/AccessDecisionManager.html[`AccessDecisionManager`] or {security-api-url}org/springframework/security/access/AccessDecisionVoter.html[`AccessDecisionVoter`] arrangement.
The preparation strategy will depend on your reason for each arrangement.
Read on to find the best match for your situation.

===== I use `UnanimousBased`

If your application uses {security-api-url}org/springframework/security/access/vote/UnanimousBased.html[`UnanimousBased`], you should first adapt or replace any ``AccessDecisionVoter``s and then you can construct an `AuthorizationManager` like so:

====
.Java
[source,java,role="primary"]
----
@Bean
AuthorizationManager<RequestAuthorizationContext> requestAuthorization() {
    PolicyAuthorizationManager policy = ...;
    LocalAuthorizationManager local = ...;
    return AuthorizationMangers.allOf(policy, local);
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
fun requestAuthorization(): AuthorizationManager<RequestAuthorizationContext> {
    val policy: PolicyAuthorizationManager = ...
    val local: LocalAuthorizationManager = ...
    return AuthorizationMangers.allOf(policy, local)
}
----

.Xml
[source,xml,role="secondary"]
----
<bean id="requestAuthorization" class="org.springframework.security.authorization.AuthorizationManagers"
        factory-method="allOf">
    <constructor-arg>
        <util:list>
            <bean class="my.PolicyAuthorizationManager"/>
            <bean class="my.LocalAuthorizationManager"/>
        </util:list>
    </constructor-arg>
</bean>
----
====

then, wire it into the DSL like so:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize.anyRequest().access(requestAuthorization))
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        authorize(anyRequest, requestAuthorization)
    }
    // ...
}
----

.Xml
[source,xml,role="secondary"]
----
<http authorization-manager-ref="requestAuthorization"/>
----
====

[NOTE]
====
`authorizeHttpRequests` is designed so that you can apply a custom `AuthorizationManager` to any url pattern.
See xref:servlet/authorization/authorize-http-requests.adoc#custom-authorization-manager[the reference] for more details.
====

===== I use `AffirmativeBased`

If your application uses {security-api-url}org/springframework/security/access/vote/AffirmativeBased.html[`AffirmativeBased`], then you can construct an equivalent {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`], like so:

====
.Java
[source,java,role="primary"]
----
@Bean
AuthorizationManager<RequestAuthorizationContext> requestAuthorization() {
    PolicyAuthorizationManager policy = ...;
    LocalAuthorizationManager local = ...;
    return AuthorizationMangers.anyOf(policy, local);
}
----

.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
fun requestAuthorization(): AuthorizationManager<RequestAuthorizationContext> {
    val policy: PolicyAuthorizationManager = ...
    val local: LocalAuthorizationManager = ...
    return AuthorizationMangers.anyOf(policy, local)
}
----

.Xml
[source,xml,role="secondary"]
----
<bean id="requestAuthorization" class="org.springframework.security.authorization.AuthorizationManagers"
        factory-method="anyOf">
    <constructor-arg>
        <util:list>
            <bean class="my.PolicyAuthorizationManager"/>
            <bean class="my.LocalAuthorizationManager"/>
        </util:list>
    </constructor-arg>
</bean>
----
====

then, wire it into the DSL like so:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize.anyRequest().access(requestAuthorization))
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        authorize(anyRequest, requestAuthorization)
    }
    // ...
}
----

.Xml
[source,xml,role="secondary"]
----
<http authorization-manager-ref="requestAuthorization"/>
----
====

[NOTE]
====
`authorizeHttpRequests` is designed so that you can apply a custom `AuthorizationManager` to any url pattern.
See xref:servlet/authorization/authorize-http-requests.adoc#custom-authorization-manager[the reference] for more details.
====

===== I use `ConsensusBased`

There is no framework-provided equivalent for {security-api-url}org/springframework/security/access/vote/ConsensusBased.html[`ConsensusBased`].
In that case, please implement a composite {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] that takes the set of delegate ``AuthorizationManager``s into account.

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/authorize-http-requests.adoc#custom-authorization-manager[adding a custom `AuthorizationManager`].

===== I use a custom `AccessDecisionVoter`

You should either change the class to implement {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] or create an adapter.


Without knowing what your custom voter is doing, it is impossible to recommend a general-purpose solution.
By way of example, though, here is what adapting {security-api-url}org/springframework/security/access/SecurityMetadataSource.html[`SecurityMetadataSource`] and {security-api-url}org/springframework/security/access/AccessDecisionVoter.html[`AccessDecisionVoter`] for `anyRequest().authenticated()` would look like:

====
.Java
[source,java,role="primary"]
----
public final class AnyRequestAuthenticatedAuthorizationManagerAdapter implements AuthorizationManager<RequestAuthorizationContext> {
    private final SecurityMetadataSource metadata;
    private final AccessDecisionVoter voter;

    public PreAuthorizeAuthorizationManagerAdapter(SecurityExpressionHandler expressionHandler) {
        Map<RequestMatcher, List<ConfigAttribute>> requestMap = Collections.singletonMap(
                AnyRequestMatcher.INSTANCE, Collections.singletonList(new SecurityConfig("authenticated")));
        this.metadata = new DefaultFilterInvocationSecurityMetadataSource(requestMap);
        WebExpressionVoter voter = new WebExpressionVoter();
        voter.setExpressionHandler(expressionHandler);
        this.voter = voter;
    }

    public AuthorizationDecision check(Supplier<Authentication> authentication, RequestAuthorizationContext context) {
        List<ConfigAttribute> attributes = this.metadata.getAttributes(context);
        int decision = this.voter.vote(authentication.get(), invocation, attributes);
        if (decision == ACCESS_GRANTED) {
            return new AuthorizationDecision(true);
        }
        if (decision == ACCESS_DENIED) {
            return new AuthorizationDecision(false);
        }
        return null; // abstain
    }
}
----
====

Once you have implemented `AuthorizationManager`, please follow the details in the reference manual for xref:servlet/authorization/authorize-http-requests.adoc#custom-authorization-manager[adding a custom `AuthorizationManager`].

[[servlet-authorizationmanager-requests-opt-out]]
==== Opt-out Steps

In case you had trouble, take a look at these scenarios for optimal opt out behavior:

===== I cannot secure all dispatcher types

If you cannot secure all dispatcher types, first try and declare which dispatcher types should not require authorization like so:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .shouldFilterAllDispatcherTypes(true)
        .dispatcherTypeMatchers(FORWARD, INCLUDE).permitAll()
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
        .anyRequest().denyAll()
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        shouldFilterAllDispatcherTypes = true
        authorize(DispatcherTypeRequestMatcher(FORWARD, INCLUDE), permitAll)
        authorize("/app/**", hasRole("APP"))
        // ...
        authorize(anyRequest, denyAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http filter-all-dispatcher-types="true" use-authorization-manager="true">
    <intercept-url request-matcher-ref="dispatchers"/>
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="denyAll"/>
</http>

<bean id="dispatchers" class="org.springframework.security.web.util.matcher.DispatcherTypeRequestMatcher">
    <constructor-arg>
        <util:list value-type="javax.servlet.DispatcherType">
            <value>FORWARD</value>
            <value>INCLUDE</value>
        </util:list>
    </constructor-arg>
</bean>
----
====

Or, if that doesn't work, then you can explicitly opt out of the behavior by setting `filter-all-dispatcher-types` and `filterAllDispatcherTypes` to `false`:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpRequests((authorize) -> authorize
        .filterAllDispatcherTypes(false)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        filterAllDispatcherTypes = false
        authorize("/messages/**", hasRole("APP"))
        // ...
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http filter-all-dispatcher-types="false" use-authorization-manager="true">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
</http>
----
====

or, if you are still using `authorizeRequests` or `use-authorization-manager="false"`, set `oncePerRequest` to `true`:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeRequests((authorize) -> authorize
        .filterSecurityInterceptorOncePerRequest(true)
        .mvcMatchers("/app/**").hasRole("APP")
        // ...
    )
    // ...
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeRequests {
        filterSecurityInterceptorOncePerRequest = true
        authorize("/messages/**", hasRole("APP"))
        // ...
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http once-per-request="true" use-authorization-manager="false">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
</http>
----
====

===== I cannot declare an authorization rule for all requests

If you are having trouble setting an `anyRequest` authorization rule of `denyAll`, please use {security-api-url}org/springframework/security/config/annotation/web/configurers/ExpressionUrlAuthorizationConfigurer.AuthorizedUrl.html#permitAll()[`permitAll`] instead, like so:

====
.Java
[source,java,role="primary"]
----
http
    .authorizeHttpReqeusts((authorize) -> authorize
        .mvcMatchers("/app/*").hasRole("APP")
        // ...
        .anyRequest().permitAll()
    )
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    authorizeHttpRequests {
        authorize("/app*", hasRole("APP"))
        // ...
        authorize(anyRequest, permitAll)
    }
}
----

.Xml
[source,xml,role="secondary"]
----
<http>
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
    <intercept-url pattern="/**" access="permitAll"/>
</http>
----
====

===== I cannot migrate my SpEL or my `AccessDecisionManager`

If you are having trouble with SpEL, `AccessDecisionManager`, or there is some other feature that you are needing to keep using in `<http>` or `authorizeRequests`, try the following.

First, if you still need `authorizeRequests`, you are welcome to keep using it. Even though it is deprecated, it is not removed in 6.0.

Second, if you still need your custom `access-decision-manager-ref` or have some other reason to opt out of `AuthorizationManager`, do:

====
.Xml
[source,xml,role="secondary"]
----
<http use-authorization-manager="false">
    <intercept-url pattern="/app/*" access="hasRole('APP')"/>
    <!-- ... -->
</http>
----
====

=== Propagate ``AuthenticationServiceException``s

{security-api-url}org/springframework/security/web/authentication/AuthenticationFilter.html[`AuthenticationFilter`] propagates {security-api-url}org/springframework/security/authentication/AuthenticationServiceException.html[``AuthenticationServiceException``]s to the {security-api-url}org/springframework/security/authentication/AuthenticationEntryPoint.html[`AuthenticationEntryPoint`].
Because ``AuthenticationServiceException``s represent a server-side error instead of a client-side error, in 6.0, this changes to propagate them to the container.

==== Configure `AuthenticationFailureHandler` to rethrow ``AuthenticationServiceException``s

To prepare for the 6.0 default, wire `AuthenticationFilter` instances with a `AuthenticationFailureHandler` that rethrows ``AuthenticationServiceException``s, like so:

====
.Java
[source,java,role="primary"]
----
AuthenticationFilter authenticationFilter = new AuthenticationFilter(...);
AuthenticationEntryPointFailureHandler handler = new AuthenticationEntryPointFailureHandler(...);
handler.setRethrowAuthenticationServiceException(true);
authenticationFilter.setAuthenticationFailureHandler(handler);
----

.Kotlin
[source,kotlin,role="secondary"]
----
val authenticationFilter: AuthenticationFilter = new AuthenticationFilter(...)
val handler: AuthenticationEntryPointFailureHandler = new AuthenticationEntryPointFailureHandler(...)
handler.setRethrowAuthenticationServiceException(true)
authenticationFilter.setAuthenticationFailureHandler(handler)
----

.Xml
[source,xml,role="secondary"]
----
<bean id="authenticationFilter" class="org.springframework.security.web.authentication.AuthenticationFilter">
    <!-- ... -->
    <property ref="authenticationFailureHandler"/>
</bean>

<bean id="authenticationFailureHandler" class="org.springframework.security.web.authentication.AuthenticationEntryPointFailureHandler">
    <property name="rethrowAuthenticationServiceException" value="true"/>
</bean>
----
====

[[servlet-authenticationfailurehandler-opt-out]]
==== Opt-out Steps

If rethrowing ``AuthenticationServiceException``s gives you trouble, you can set the value to false instead of taking the 6.0 default, like so:

====
.Java
[source,java,role="primary"]
----
AuthenticationFilter authenticationFilter = new AuthenticationFilter(...);
AuthenticationEntryPointFailureHandler handler = new AuthenticationEntryPointFailureHandler(...);
handler.setRethrowAuthenticationServiceException(false);
authenticationFilter.setAuthenticationFailureHandler(handler);
----

.Kotlin
[source,kotlin,role="secondary"]
----
val authenticationFilter: AuthenticationFilter = new AuthenticationFilter(...)
val handler: AuthenticationEntryPointFailureHandler = new AuthenticationEntryPointFailureHandler(...)
handler.setRethrowAuthenticationServiceException(false)
authenticationFilter.setAuthenticationFailureHandler(handler)
----

.Xml
[source,xml,role="secondary"]
----
<bean id="authenticationFilter" class="org.springframework.security.web.authentication.AuthenticationFilter">
    <!-- ... -->
    <property ref="authenticationFailureHandler"/>
</bean>

<bean id="authenticationFailureHandler" class="org.springframework.security.web.authentication.AuthenticationEntryPointFailureHandler">
    <property name="rethrowAuthenticationServiceException" value="false"/>
</bean>
----
====

[[servlet-opt-in-sha256-rememberme]]
=== Use SHA-256 in Remember Me

The `TokenBasedRememberMeServices` implementation now supports SHA-256 for the Remember Me token and this is the default in Spring Security 6.
This change makes the implementation more secure by default since MD5 is already proven to be a weak hashing algorithm and vulnerable against collision attacks and modular differential attacks.

The new generated tokens now have the information of which algorithm was used to generate the token and that information is used in order to match it.
If the algorithm name is not present, then the `matchingAlgorithm` property is used to check the token.
This allows for a smooth transition from MD5 to SHA-256.

To opt into the new Spring Security 6 default to encode the tokens while still being able to decode tokens encoded with MD5, you can set the `encodingAlgorithm` property to SHA-256 and the `matchingAlgorithm` property to MD5.
See the xref:servlet/authentication/rememberme.adoc#_tokenbasedremembermeservices[reference documentation] and the {security-api-url}org/springframework/security/web/authentication/rememberme/TokenBasedRememberMeServices.html[API docs] for more information.

[[servlet-opt-in-sha256-sha256-encoding]]
.Use Spring Security 6 defaults for encoding, SHA-256 for encoding and MD5 for matching
====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http, RememberMeServices rememberMeServices) throws Exception {
        http
                // ...
                .rememberMe((remember) -> remember
                    .rememberMeServices(rememberMeServices)
                );
        return http.build();
    }

    @Bean
    RememberMeServices rememberMeServices(UserDetailsService userDetailsService) {
        RememberMeTokenAlgorithm encodingAlgorithm = RememberMeTokenAlgorithm.SHA256;
        TokenBasedRememberMeServices rememberMe = new TokenBasedRememberMeServices(myKey, userDetailsService, encodingAlgorithm);
        rememberMe.setMatchingAlgorithm(RememberMeTokenAlgorithm.MD5);
        return rememberMe;
    }

}
----

.XML
[source,xml,role="secondary"]
----
<http>
  <remember-me services-ref="rememberMeServices"/>
</http>

<bean id="rememberMeServices" class=
"org.springframework.security.web.authentication.rememberme.TokenBasedRememberMeServices">
    <property name="userDetailsService" ref="myUserDetailsService"/>
    <property name="key" value="springRocks"/>
    <property name="matchingAlgorithm" value="MD5"/>
    <property name="encodingAlgorithm" value="SHA256"/>
</bean>
----
====

At some point, you will want to fully migrate to Spring Security 6 defaults. But how do you know when it is safe to do so?
Let's suppose that you deployed your application using SHA-256 as the encoding algorithm (as you have done <<servlet-opt-in-sha256-sha256-encoding,here>>) on November 1st, if you have the value for the `tokenValiditySeconds` property set to N days (14 is the default), you can migrate to SHA-256 N days after November 1st (which is November 15th in this example).
By that time, all the tokens generated with MD5 will have expired.

.Use Spring Security 6 defaults, SHA-256 for both encoding and matching
====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http, RememberMeServices rememberMeServices) throws Exception {
        http
                // ...
                .rememberMe((remember) -> remember
                    .rememberMeServices(rememberMeServices)
                );
        return http.build();
    }

    @Bean
    RememberMeServices rememberMeServices(UserDetailsService userDetailsService) {
        RememberMeTokenAlgorithm encodingAlgorithm = RememberMeTokenAlgorithm.SHA256;
        TokenBasedRememberMeServices rememberMe = new TokenBasedRememberMeServices(myKey, userDetailsService, encodingAlgorithm);
        rememberMe.setMatchingAlgorithm(RememberMeTokenAlgorithm.SHA256);
        return rememberMe;
    }

}
----

.XML
[source,xml,role="secondary"]
----
<http>
  <remember-me services-ref="rememberMeServices"/>
</http>

<bean id="rememberMeServices" class=
"org.springframework.security.web.authentication.rememberme.TokenBasedRememberMeServices">
    <property name="userDetailsService" ref="myUserDetailsService"/>
    <property name="key" value="springRocks"/>
    <property name="matchingAlgorithm" value="SHA256"/>
    <property name="encodingAlgorithm" value="SHA256"/>
</bean>
----
====

If you are having problems with the Spring Security 6 defaults, you can explicitly opt into 5.8 defaults using the following configuration:

.Use MD5 for both encoding and matching algorithms
====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http, RememberMeServices rememberMeServices) throws Exception {
        http
                // ...
                .rememberMe((remember) -> remember
                    .rememberMeServices(rememberMeServices)
                );
        return http.build();
    }

    @Bean
    RememberMeServices rememberMeServices(UserDetailsService userDetailsService) {
        RememberMeTokenAlgorithm encodingAlgorithm = RememberMeTokenAlgorithm.MD5;
        TokenBasedRememberMeServices rememberMe = new TokenBasedRememberMeServices(myKey, userDetailsService, encodingAlgorithm);
        rememberMe.setMatchingAlgorithm(RememberMeTokenAlgorithm.MD5);
        return rememberMe;
    }

}
----

.XML
[source,xml,role="secondary"]
----
<http>
  <remember-me services-ref="rememberMeServices"/>
</http>

<bean id="rememberMeServices" class=
"org.springframework.security.web.authentication.rememberme.TokenBasedRememberMeServices">
    <property name="userDetailsService" ref="myUserDetailsService"/>
    <property name="key" value="springRocks"/>
    <property name="matchingAlgorithm" value="MD5"/>
    <property name="encodingAlgorithm" value="MD5"/>
</bean>
----
====

=== Stop Using SAML 2.0 `Converter` constructors

In an early release of Spring Security's SAML 2.0 support, `Saml2MetadataFilter` and `Saml2AuthenticationTokenConverter` shipped with constructors of type `Converter`.
This level of abstraction made it tricky to evolve the class and so a dedicated interface `RelyingPartyRegistrationResolver` was introduced in a later release.

In 6.0, the `Converter` constructors are removed.
To prepare for this in 5.8, change classes that implement `Converter<HttpServletRequest, RelyingPartyRegistration>` to instead implement `RelyingPartyRegistrationResolver`.

=== Change to Using `Saml2AuthenticationRequestResolver`

`Saml2AuthenticationContextResolver` and `Saml2AuthenticationRequestFactory` are removed in 6.0 as is the `Saml2WebSsoAuthenticationRequestFilter` that requires them.
They are replaced by `Saml2AuthenticationRequestResolver` and a new constructor in `Saml2WebSsoAuthenticationRequestFilter`.
The new interface removes an unnecessary transport object between the two classes.

Most applications need do nothing; however, if you use or configure `Saml2AuthenticationRequestContextResolver` or `Saml2AuthenticationRequestFactory`, try the following steps to convert instead use `Saml2AuthenticationRequestResolver`.

==== Use `setAuthnRequestCustomizer` instead of `setAuthenticationRequestContextConverter`

If you are calling `OpenSaml4AuthenticationReqeustFactory#setAuthenticationRequestContextConverter`, for example, like so:

====
.Java
[source,java,role="primary"]
----
@Bean
Saml2AuthenticationRequestFactory authenticationRequestFactory() {
    OpenSaml4AuthenticationRequestFactory factory = new OpenSaml4AuthenticationRequestFactory();
	factory.setAuthenticationRequestContextConverter((context) -> {
        AuthnRequestBuilder authnRequestBuilder =  ConfigurationService.get(XMLObjectProviderRegistry.class)
            .getBuilderFactory().getBuilder(AuthnRequest.DEFAULT_ELEMENT_NAME);
		IssuerBuilder issuerBuilder =  ConfigurationService.get(XMLObjectProviderRegistry.class)
            .getBuilderFactory().getBuilder(Issuer.DEFAULT_ELEMENT_NAME);
        tring issuer = context.getIssuer();
		String destination = context.getDestination();
		String assertionConsumerServiceUrl = context.getAssertionConsumerServiceUrl();
		String protocolBinding = context.getRelyingPartyRegistration().getAssertionConsumerServiceBinding().getUrn();
		AuthnRequest auth = authnRequestBuilder.buildObject();
		auth.setID("ARQ" + UUID.randomUUID().toString().substring(1));
		auth.setIssueInstant(Instant.now());
		auth.setForceAuthn(Boolean.TRUE);
		auth.setIsPassive(Boolean.FALSE);
		auth.setProtocolBinding(SAMLConstants.SAML2_POST_BINDING_URI);
		Issuer iss = issuerBuilder.buildObject();
		iss.setValue(issuer);
		auth.setIssuer(iss);
		auth.setDestination(destination);
		auth.setAssertionConsumerServiceURL(assertionConsumerServiceUrl);
	});
	return factory;
}
----
====

to ensure that ForceAuthn is set to `true`, you can instead do:

====
.Java
[source,java,role="primary"]
----
@Bean
Saml2AuthenticationRequestResolver authenticationRequestResolver(RelyingPartyRegistrationResolver registrations) {
    OpenSaml4AuthenticationRequestResolver reaolver = new OpenSaml4AuthenticationRequestResolver(registrations);
	resolver.setAuthnRequestCustomizer((context) -> context.getAuthnRequest().setForceAuthn(Boolean.TRUE));
	return resolver;
}
----
====

Also, since `setAuthnRequestCustomizer` has direct access to the `HttpServletRequest`, there is no need for a `Saml2AuthenticationRequestContextResolver`.
Simply use `setAuthnRequestCustomizer` to read directly from `HttpServletRequest` this information you need.

==== Use `setAuthnRequestCustomizer` instead of `setProtocolBinding`

Instead of doing:

====
.Java
[source,java,role="primary"]
----
@Bean
Saml2AuthenticationRequestFactory authenticationRequestFactory() {
    OpenSaml4AuthenticationRequestFactory factory = new OpenSaml4AuthenticationRequestFactory();
	factory.setProtocolBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST")
	return factory;
}
----
====

you can do:

====
.Java
[source,java,role="primary"]
----
@Bean
Saml2AuthenticationRequestResolver authenticationRequestResolver() {
	OpenSaml4AuthenticationRequestResolver reaolver = new OpenSaml4AuthenticationRequestResolver(registrations);
	resolver.setAuthnRequestCustomizer((context) -> context.getAuthnRequest()
            .setProtocolBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"));
	return resolver;
}
----
====

[NOTE]
====
Since Spring Security only supports the `POST` binding for authentication, there is not very much value in overriding the protocol binding at this point in time.
====

=== Use the latest `Saml2AuthenticationToken` constructor

In an early release, `Saml2AuthenticationToken` took several individual settings as constructor parameters.
This created a challenge each time a new parameter needed to be added.
Since most of these settings were part of `RelyingPartyRegistration`, a new constructor was added where a `RelyingPartyRegistration` could be provided, making the constructor more stable.
It also is valuable in that it more closely aligns with the design of `OAuth2LoginAuthenticationToken`.

Most applications do not construct this class directly since `Saml2WebSsoAuthenticationFilter` does.
However, in the event that your application constructs one, please change from:

====
.Java
[source,java,role="primary"]
----
new Saml2AuthenticationToken(saml2Response, registration.getSingleSignOnServiceLocation(),
    registration.getAssertingParty().getEntityId(), registration.getEntityId(), registration.getCredentials())
----

.Kotlin
[source,kotlin,role="secondary"]
----
Saml2AuthenticationToken(saml2Response, registration.getSingleSignOnServiceLocation(),
    registration.getAssertingParty().getEntityId(), registration.getEntityId(), registration.getCredentials())
----
====

to:

====
.Java
[source,java,role="primary"]
----
new Saml2AuthenticationToken(saml2Response, registration)
----

.Kotlin
[source,kotlin,role="secondary"]
----
Saml2AuthenticationToken(saml2Response, registration)
----
====

=== Use `RelyingPartyRegistration` updated methods

In an early release of Spring Security's SAML support, there was some ambiguity on the meaning of certain `RelyingPartyRegistration` methods and their function.
As more capabilities were added to `RelyingPartyRegistration`, it became necessary to clarify this ambiguity by changing method names to ones that aligned with spec language.

The deprecated methods in `RelyingPartyRegstration` are removed.
To prepare for that, consider the following representative usage of `RelyingPartyRegistration`:

====
.Java
[source,java,role="primary"]
----
String idpEntityId = registration.getRemoteIdpEntityId();
String assertionConsumerServiceUrl = registration.getAssertionConsumerServiceUrlTemplate();
String idpWebSsoUrl = registration.getIdpWebSsoUrl();
String localEntityId = registration.getLocalEntityIdTemplate();
List<Saml2X509Credential> verifying = registration.getCredentials().stream()
        .filter(Saml2X509Credential::isSignatureVerficationCredential)
        .collect(Collectors.toList());
----

.Kotlin
[source,kotlin,role="secondary"]
----
val idpEntityId: String = registration.getRemoteIdpEntityId()
val assertionConsumerServiceUrl: String = registration.getAssertionConsumerServiceUrlTemplate()
val idpWebSsoUrl: String = registration.getIdpWebSsoUrl()
val localEntityId: String = registration.getLocalEntityIdTemplate()
val verifying: List<Saml2X509Credential> = registration.getCredentials()
        .filter(Saml2X509Credential::isSignatureVerficationCredential)
----
====

This should change to:

====
.Java
[source,java,role="primary"]
----
String assertingPartyEntityId = registration.getAssertingPartyDetails().getEntityId();
String assertionConsumerServiceLocation = registration.getAssertionConsumerServiceLocation();
String singleSignOnServiceLocation = registration.getAssertingPartyDetails().getSingleSignOnServiceLocation();
String entityId = registration.getEntityId();
List<Saml2X509Credential> verifying = registration.getAssertingPartyDetails().getVerificationX509Credentials();
----

.Kotlin
[source,kotlin,role="secondary"]
----
val assertingPartyEntityId: String = registration.getAssertingPartyDetails().getEntityId()
val assertionConsumerServiceLocation: String = registration.getAssertionConsumerServiceLocation()
val singleSignOnServiceLocation: String = registration.getAssertingPartyDetails().getSingleSignOnServiceLocation()
val entityId: String = registration.getEntityId()
val verifying: List<Saml2X509Credential> = registration.getAssertingPartyDetails().getVerificationX509Credentials()
----
====

For a complete listing of all changed methods, please see {security-api-url}org/springframework/security/saml2/provider/service/registration/RelyingPartyRegistration.html[``RelyingPartyRegistration``'s JavaDoc].

=== Use OpenSAML 4

OpenSAML 3 has reached its end-of-life.
As such, Spring Security 6 drops support for it, bumping up its OpenSAML baseline to 4.

To prepare for the upgrade, update your pom to depend on OpenSAML 4 instead of 3:

====
.Maven
[source,maven,role="primary"]
----
<dependencyManagement>
    <dependency>
        <groupId>org.opensaml</groupId>
        <artifactId>opensaml-core</artifactId>
        <version>4.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.opensaml</groupId>
        <artifactId>opensaml-saml-api</artifactId>
        <version>4.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.opensaml</groupId>
        <artifactId>opensaml-saml-impl</artifactId>
        <version>4.2.1</version>
    </dependency>
</dependencyManagement>
----

.Gradle
[source,gradle,role="secondary"]
----
dependencies {
    constraints {
        api "org.opensaml:opensaml-core:4.2.1"
        api "org.opensaml:opensaml-saml-api:4.2.1"
        api "org.opensaml:opensaml-saml-impl:4.2.1"
    }
}
----
====

You must use at least OpenSAML 4.1.1 to update to Spring Security 6's SAML support.

=== Use `OpenSaml4AuthenticationProvider`

In order to support both OpenSAML 3 and 4 at the same time, Spring Security released `OpenSamlAuthenticationProvider` and `OpenSaml4AuthenticationProvider`.
In 6.0, because OpenSAML3 support is removed, `OpenSamlAuthenticationProvider` is removed as well.

Not all methods in `OpenSamlAuthenticationProvider` were ported 1-to-1 to `OpenSaml4AuthenticationProvider`.
As such, some adjustment will be required to make the challenge.

Consider the following representative usage of `OpenSamlAuthenticationProvider`:

====
.Java
[source,java,role="primary"]
----
OpenSamlAuthenticationProvider versionThree = new OpenSamlAuthenticationProvider();
versionThree.setAuthoritiesExtractor(myAuthoritiesExtractor);
versionThree.setResponseTimeValidationSkew(myDuration);
----

.Kotlin
[source,kotlin,role="secondary"]
----
val versionThree: OpenSamlAuthenticationProvider = OpenSamlAuthenticationProvider()
versionThree.setAuthoritiesExtractor(myAuthoritiesExtractor)
versionThree.setResponseTimeValidationSkew(myDuration)
----
====

This should change to:

====
.Java
[source,java,role="primary"]
----
Converter<ResponseToken, Saml2Authentication> delegate = OpenSaml4AuthenticationProvider
        .createDefaultResponseAuthenticationConverter();
OpenSaml4AuthenticationProvider versionFour = new OpenSaml4AuthenticationProvider();
versionFour.setResponseAuthenticationConverter((responseToken) -> {
	Saml2Authentication authentication = delegate.convert(responseToken);
	Assertion assertion = responseToken.getResponse().getAssertions().get(0);
	AuthenticatedPrincipal principal = (AuthenticatedPrincipal) authentication.getPrincipal();
	Collection<GrantedAuthority> authorities = myAuthoritiesExtractor.convert(assertion);
	return new Saml2Authentication(principal, authentication.getSaml2Response(), authorities);
});
Converter<AssertionToken, Saml2ResponseValidationResult> validator = OpenSaml4AuthenticationProvider
        .createDefaultAssertionValidatorWithParameters((p) -> p.put(CLOCK_SKEW, myDuration));
versionFour.setAssertionValidator(validator);
----

.Kotlin
[source,kotlin,role="secondary"]
----
val delegate = OpenSaml4AuthenticationProvider.createDefaultResponseAuthenticationConverter()
val versionFour = OpenSaml4AuthenticationProvider()
versionFour.setResponseAuthenticationConverter({
    responseToken -> {
        val authentication = delegate.convert(responseToken)
        val assertion = responseToken.getResponse().getAssertions().get(0)
        val principal = (AuthenticatedPrincipal) authentication.getPrincipal()
        val authorities = myAuthoritiesExtractor.convert(assertion)
        return Saml2Authentication(principal, authentication.getSaml2Response(), authorities)
    }
})
val validator = OpenSaml4AuthenticationProvider
        .createDefaultAssertionValidatorWithParameters({ p -> p.put(CLOCK_SKEW, myDuration) })
versionFour.setAssertionValidator(validator)
----
====

[[use-new-requestmatchers]]
=== Use the new `requestMatchers` methods

In Spring Security 5.8, the {security-api-url}org/springframework/security/config/annotation/web/AbstractRequestMatcherRegistry.html#antMatchers(java.lang.String...)[`antMatchers`], {security-api-url}org/springframework/security/config/annotation/web/AbstractRequestMatcherRegistry.html#mvcMatchers(java.lang.String...)[`mvcMatchers`], and {security-api-url}org/springframework/security/config/annotation/web/AbstractRequestMatcherRegistry.html#regexMatchers(java.lang.String...)[`regexMatchers`] methods were deprecated in favor of new xref::servlet/authorization/authorize-http-requests.adoc#_request_matchers[`requestMatchers` methods].

The new `requestMatchers` methods were added xref::servlet/authorization/authorize-http-requests.adoc[to `authorizeHttpRequests`], `authorizeRequests`, CSRF configuration, `WebSecurityCustomizer` and any other places that had the specialized `RequestMatcher` methods.
The deprecated methods are removed in Spring Security 6.

These new methods have more secure defaults since they choose the most appropriate `RequestMatcher` implementation for your application.
In summary, the new methods choose the `MvcRequestMatcher` implementation if your application has Spring MVC in the classpath, falling back to the `AntPathRequestMatcher` implementation if Spring MVC is not present (aligning the behavior with the Kotlin equivalent methods).

To start using the new methods, you can replace the deprecated methods with the new ones. For example, the following application configuration:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .antMatchers("/api/admin/**").hasRole("ADMIN")
                .antMatchers("/api/user/**").hasRole("USER")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

can be changed to:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .requestMatchers("/api/admin/**").hasRole("ADMIN")
                .requestMatchers("/api/user/**").hasRole("USER")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

If you have Spring MVC in the classpath and are using the `mvcMatchers` methods, you can replace it with the new methods and Spring Security will choose the `MvcRequestMatcher` implementation for you.
The following configuration:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
@EnableWebMvc
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .mvcMatchers("/admin/**").hasRole("ADMIN")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

is equivalent to:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
@EnableWebMvc
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .requestMatchers("/admin/**").hasRole("ADMIN")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

If you are customizing the `servletPath` property of the `MvcRequestMatcher`, you can now use the `MvcRequestMatcher.Builder` to create `MvcRequestMatcher` instances that share the same servlet path:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
@EnableWebMvc
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .mvcMatchers("/admin").servletPath("/path").hasRole("ADMIN")
                .mvcMatchers("/user").servletPath("/path").hasRole("USER")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

The code above can be rewritten using the `MvcRequestMatcher.Builder` and the `requestMatchers` method:

====
.Java
[source,java,role="primary"]
----
@Configuration
@EnableWebSecurity
@EnableWebMvc
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http, HandlerMappingIntrospector introspector) throws Exception {
        MvcRequestMatcher.Builder mvcMatcherBuilder = new MvcRequestMatcher.Builder(introspector).servletPath("/path");
        http
            .authorizeHttpRequests((authz) -> authz
                .requestMatchers(mvcMatcherBuilder.pattern("/admin")).hasRole("ADMIN")
                .requestMatchers(mvcMatcherBuilder.pattern("/user")).hasRole("USER")
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

If you are having problem with the new `requestMatchers` methods, you can always switch back to the `RequestMatcher` implementation that you were using.
For example, if you still want to use `AntPathRequestMatcher` and `RegexRequestMatcher` implementations, you can use the `requestMatchers` method that accepts a `RequestMatcher` instance:

====
.Java
[source,java,role="primary"]
----
import static org.springframework.security.web.util.matcher.AntPathRequestMatcher.antMatcher;
import static org.springframework.security.web.util.matcher.RegexRequestMatcher.regexMatcher;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests((authz) -> authz
                .requestMatchers(antMatcher("/user/**")).hasRole("USER")
                .requestMatchers(antMatcher(HttpMethod.POST, "/user/**")).hasRole("ADMIN")
                .requestMatchers(regexMatcher(".*\\?x=y")).hasRole("SPECIAL") // matches /any/path?x=y
                .anyRequest().authenticated()
            );
        return http.build();
    }

}
----
====

Note that the above sample uses static factory methods from {security-api-url}org/springframework/security/web/util/matcher/AntPathRequestMatcher.html[`AntPathRequestMatcher`] and {security-api-url}org/springframework/security/web/util/matcher/RegexRequestMatcher.html[`RegexRequestMatcher`] to improve readability.

If you are using the `WebSecurityCustomizer` interface, you can replace the deprecated `antMatchers` methods:

====
.Java
[source,java,role="primary"]
----
@Bean
public WebSecurityCustomizer webSecurityCustomizer() {
	return (web) -> web.ignoring().antMatchers("/ignore1", "/ignore2");
}
----
====

with their `requestMatchers` counterparts:

====
.Java
[source,java,role="primary"]
----
@Bean
public WebSecurityCustomizer webSecurityCustomizer() {
	return (web) -> web.ignoring().requestMatchers("/ignore1", "/ignore2");
}
----
====

The same way, if you are customizing the CSRF configuration to ignore some paths, you can replace the deprecated methods with the `requestMatchers` methods:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .csrf((csrf) -> csrf
            .ignoringAntMatchers("/no-csrf")
        );
    return http.build();
}
----
====

can be changed to:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .csrf((csrf) -> csrf
            .ignoringRequestMatchers("/no-csrf")
        );
    return http.build();
}
----
====

[[use-new-security-matchers]]
=== Use the new `securityMatchers` methods

In Spring Security 5.8, the `antMatchers`, `mvcMatchers` and `requestMatchers` methods from `HttpSecurity` were deprecated in favor of new `securityMatchers` methods.

Note that these methods are not the same from `authorizeHttpRequests` methods <<use-new-requestmatchers,which were deprecated>> in favor of the `requestMatchers` methods.
However, the `securityMatchers` methods are similar to the `requestMatchers` methods in the sense that they will choose the most appropriate `RequestMatcher` implementation for your application.
In summary, the new methods choose the `MvcRequestMatcher` implementation if your application has Spring MVC in the classpath, falling back to the `AntPathRequestMatcher` implementation if Spring MVC is not present (aligning the behavior with the Kotlin equivalent methods).
Another reason for adding the `securityMatchers` methods is to avoid confusion with the `requestMatchers` methods from `authorizeHttpRequests`.

The following configuration:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .antMatcher("/api/**", "/app/**")
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/api/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}
----
====

can be rewritten using the `securityMatchers` methods:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .securityMatcher("/api/**", "/app/**")
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/api/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}
----
====

If you are using a custom `RequestMatcher` in your `HttpSecurity` configuration:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .requestMatcher(new MyCustomRequestMatcher())
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/api/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}

public class MyCustomRequestMatcher implements RequestMatcher {
	// ...
}
----
====

you can do the same using `securityMatcher`:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .securityMatcher(new MyCustomRequestMatcher())
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/api/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}

public class MyCustomRequestMatcher implements RequestMatcher {
	// ...
}
----
====

If you are combining multiple `RequestMatcher` implementations in your `HttpSecurity` configuration:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .requestMatchers((matchers) -> matchers
            .antMatchers("/api/**", "/app/**")
            .mvcMatchers("/admin/**")
            .requestMatchers(new MyCustomRequestMatcher())
        )
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}
----
====

you can change it by using `securityMatchers`:

====
.Java
[source,java,role="primary"]
----
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .securityMatchers((matchers) -> matchers
            .requestMatchers("/api/**", "/app/**", "/admin/**")
            .requestMatchers(new MyCustomRequestMatcher())
        )
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers("/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}
----
====

If you are having problems with the `securityMatchers` methods choosing the `RequestMatcher` implementation for you, you can always choose the `RequestMatcher` implementation yourself:

====
.Java
[source,java,role="primary"]
----
import static org.springframework.security.web.util.matcher.AntPathRequestMatcher.antMatcher;

@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    http
        .securityMatcher(antMatcher("/api/**"), antMatcher("/app/**"))
        .authorizeHttpRequests((authz) -> authz
            .requestMatchers(antMatcher("/api/admin/**")).hasRole("ADMIN")
            .anyRequest().authenticated()
        );
    return http.build();
}
----
====

=== Stop using `Encryptors.queryableText`

`Encryptors.queryableText(CharSequence,CharSequence)` is unsafe since https://tanzu.vmware.com/security/cve-2020-5408[the same input data will produce the same output].
It was deprecated and will be removed in 6.0; Spring Security no longer supports encrypting data in this way.

To upgrade, you will either need to re-encrypt with a supported mechanism or store it decrypted.

Consider the following pseudocode for reading each encrypted entry from a table, decrypting it, and then re-encrypting it using a supported mechanism:

====
.Java
[source,java,role="primary"]
----
TextEncryptor deprecated = Encryptors.queryableText(password, salt);
BytesEncryptor aes = new AesBytesEncryptor(password, salt, KeyGenerators.secureRandom(12), CipherAlgorithm.GCM);
TextEncryptor supported = new HexEncodingTextEncryptor(aes);
for (MyEntry entry : entries) {
	String value = deprecated.decrypt(entry.getEncryptedValue()); <1>
	entry.setEncryptedValue(supported.encrypt(value)); <2>
	entryService.save(entry)
}
----
====
<1> - The above uses the deprecated `queryableText` to convert the value to plaintext.
<2> - Then, the value is re-encrypted with a supported Spring Security mechanism.

Please see the reference manual for more information on what xref:features/integrations/cryptography.adoc[encryption mechanisms Spring Security supports].

== Reactive

=== Use `AuthorizationManager` for Method Security

xref:reactive/authorization/method.adoc[Method Security] has been xref:reactive/authorization/method.adoc#jc-enable-reactive-method-security-authorization-manager[improved] through {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[the `AuthorizationManager` API] and direct use of Spring AOP.

Should you run into trouble with making these changes, you can follow the
<<reactive-authorizationmanager-methods-opt-out,opt out steps>> at the end of this section.

In Spring Security 5.8, `useAuthorizationManager` was added to {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableReactiveMethodSecurity.html[`@EnableReactiveMethodSecurity`] to allow applications to opt in to ``AuthorizationManager``'s features.

[[reactive-change-to-useauthorizationmanager]]
==== Change `useAuthorizationManager` to `true`

To opt in, change `useAuthorizationManager` to `true` like so:

====
.Java
[source,java,role="primary"]
----
@EnableReactiveMethodSecurity
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableReactiveMethodSecurity
----
====

changes to:

====
.Java
[source,java,role="primary"]
----
@EnableReactiveMethodSecurity(useAuthorizationManager = true)
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableReactiveMethodSecurity(useAuthorizationManager = true)
----
====

[[reactive-check-for-annotationconfigurationexceptions]]
==== Check for ``AnnotationConfigurationException``s

`useAuthorizationManager` activates stricter enforcement of Spring Security's non-repeatable or otherwise incompatible annotations.
If after turning on `useAuthorizationManager` you see ``AnnotationConfigurationException``s in your logs, follow the instructions in the exception message to clean up your application's method security annotation usage.

[[reactive-authorizationmanager-methods-opt-out]]
==== Opt-out Steps

If you ran into trouble with `AuthorizationManager` for reactive method security, you can opt out by changing:

====
.Java
[source,java,role="primary"]
----
@EnableReactiveMethodSecurity
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableReactiveMethodSecurity
----
====

to:

====
.Java
[source,java,role="primary"]
----
@EnableReactiveMethodSecurity(useAuthorizationManager = false)
----

.Kotlin
[source,kotlin,role="secondary"]
----
@EnableReactiveMethodSecurity(useAuthorizationManager = false)
----
====

=== Propagate ``AuthenticationServiceException``s

{security-api-url}org/springframework/security/web/server/Webauthentication/AuthenticationWebFilter.html[`AuthenticationFilter`] propagates {security-api-url}org/springframework/security/authentication/AuthenticationServiceException.html[``AuthenticationServiceException``]s to the {security-api-url}org/springframework/security/web/server/ServerAuthenticationEntryPoint.html[`ServerAuthenticationEntryPoint`].
Because ``AuthenticationServiceException``s  represent a server-side error instead of a client-side error, in 6.0, this changes to propagate them to the container.

==== Configure `ServerAuthenticationFailureHandler` to rethrow ``AuthenticationServiceException``s

To prepare for the 6.0 default, `httpBasic` and `oauth2ResourceServer` should be configured to rethrow ``AuthenticationServiceException``s.

For each, construct the appropriate authentication entry point for `httpBasic` and for `oauth2ResourceServer`:

====
.Java
[source,java,role="primary"]
----
ServerAuthenticationEntryPoint bearerEntryPoint = new BearerTokenServerAuthenticationEntryPoint();
ServerAuthenticationEntryPoint basicEntryPoint = new HttpStatusServerEntryPoint(HttpStatus.UNAUTHORIZED);
----

.Kotlin
[source,kotlin,role="secondary"]
----
val bearerEntryPoint: ServerAuthenticationEntryPoint = BearerTokenServerAuthenticationEntryPoint()
val basicEntryPoint: ServerAuthenticationEntryPoint = HttpStatusServerEntryPoint(HttpStatus.UNAUTHORIZED)
----
====

[NOTE]
====
If you use a custom `AuthenticationEntryPoint` for either or both mechanisms, use that one instead for the remaining steps.
====

Then, construct and configure a `ServerAuthenticationEntryPointFailureHandler` for each one:

====
.Java
[source,java,role="primary"]
----
AuthenticationFailureHandler bearerFailureHandler = new ServerAuthenticationEntryPointFailureHandler(bearerEntryPoint);
bearerFailureHandler.setRethrowAuthenticationServiceException(true);
AuthenticationFailureHandler basicFailureHandler = new ServerAuthenticationEntryPointFailureHandler(basicEntryPoint);
basicFailureHandler.setRethrowAuthenticationServiceException(true)
----

.Kotlin
[source,kotlin,role="secondary"]
----
val bearerFailureHandler: AuthenticationFailureHandler = ServerAuthenticationEntryPointFailureHandler(bearerEntryPoint)
bearerFailureHandler.setRethrowAuthenticationServiceException(true)
val basicFailureHandler: AuthenticationFailureHandler = ServerAuthenticationEntryPointFailureHandler(basicEntryPoint)
basicFailureHandler.setRethrowAuthenticationServiceException(true)
----
====

Finally, wire each authentication failure handler into the DSL, like so:

====
.Java
[source,java,role="primary"]
----
http
    .httpBasic((basic) -> basic.authenticationFailureHandler(basicFailureHandler))
    .oauth2ResourceServer((oauth2) -> oauth2.authenticationFailureHandler(bearerFailureHandler))
----

.Kotlin
[source,kotlin,role="secondary"]
----
http {
    httpBasic {
        authenticationFailureHandler = basicFailureHandler
    }
    oauth2ResourceServer {
        authenticationFailureHandler = bearerFailureHandler
    }
}
----
====

[[reactive-authenticationfailurehandler-opt-out]]
==== Opt-out Steps

To opt-out of the 6.0 defaults and instead continue to pass `AuthenticationServiceException` on to ``ServerAuthenticationEntryPoint``s, you can follow the same steps as above, except set `rethrowAuthenticationServiceException` to false.