Concurent Session Control Not working...??

[griff]

Hi all,

Using Spring Security 3.1.0, I cannot seem to get the concurrent session control feature to work. When I log into my system at the same time using IE and FireFox (using my local workstation) I see my user principle in the session registry twice. I am expecting the concurrent session control to log me out or throw an exception or do something that indicates I am logged into the site more than once and it is not permitted.

For what it's worth, I could not get the concurrency control to work at all using the auto config of the HTTP namespace element, even with specifying that my site uses a custom login form. I'm wondering if that might be due to the fact that my authentication is provided via LDAP...?

Here's my security config.

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
	xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/security
           http://www.springframework.org/schema/security/spring-security-3.0.xsd">

	<http auto-config="false" use-expressions="true" entry-point-ref="authenticationProcessingFilterEntryPoint">
   		<custom-filter position="CONCURRENT_SESSION_FILTER" ref="concurrencyFilter" />
   		<custom-filter position="FORM_LOGIN_FILTER" ref="myAuthFilter"/>
    	<session-management session-authentication-strategy-ref="sas"/>
		<intercept-url pattern="/" access="permitAll" />
		<intercept-url pattern="/css/**" access="permitAll" />
		<intercept-url pattern="/images/**" access="permitAll" />
		<intercept-url pattern="/js/**" access="permitAll" />
		<intercept-url pattern="/public/**" access="permitAll" />
		<intercept-url pattern="/home/**" access="permitAll" />
		<intercept-url pattern="/admin/user/**" access="hasRole('AUTH_MANAGE_USERS')" />
		<intercept-url pattern="/admin/group/**" access="hasRole('AUTH_MANAGE_USERS')" />
		<intercept-url pattern="/**" access="isAuthenticated()" />
		<access-denied-handler error-page="/403.html"/>
		<logout invalidate-session="true" logout-success-url="/public/home.do"/>
	</http>
	
    <beans:bean id="authenticationProcessingFilterEntryPoint"
          class="org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint">
        <beans:property name="loginFormUrl" value="/public/login.do"/>
        <beans:property name="forceHttps" value="false"/>
    </beans:bean>
	
	 <beans:bean id="concurrencyFilter"
	      class="org.springframework.security.web.session.ConcurrentSessionFilter">
	    <beans:property name="sessionRegistry" ref="sessionRegistry" />
	    <beans:property name="expiredUrl" value="/expired.html" />
	  </beans:bean>
	  
	  <beans:bean id="myAuthFilter" class="org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter">
	    <beans:property name="sessionAuthenticationStrategy" ref="sas" />
	    <beans:property name="authenticationManager" ref="authenticationManager" />
	  </beans:bean>
	  
	  <beans:bean id="sas" class="org.springframework.security.web.authentication.session.ConcurrentSessionControlStrategy">
	    <beans:constructor-arg name="sessionRegistry" ref="sessionRegistry" />
	    <beans:property name="maximumSessions" value="1" />
	    <beans:property name="exceptionIfMaximumExceeded" value="true"/>
	  </beans:bean>

	<authentication-manager alias="authenticationManager">
		<authentication-provider ref='ldapProvider' />
		<authentication-provider ref="externalUserLdapProvider"/>
	</authentication-manager>

	<beans:bean id="sessionRegistry" class="org.springframework.security.core.session.SessionRegistryImpl" />

	<beans:bean id="securityContext" 
		class="org.springframework.security.core.context.SecurityContextHolder" factory-method="getContext"/>

	<beans:bean id="ldapProvider"
		class="org.springframework.security.ldap.authentication.LdapAuthenticationProvider">
		<beans:constructor-arg ref="bindAuthenticator" />
		<beans:constructor-arg ref="userService" />
		<beans:property name="userDetailsContextMapper" ref="permissionedUserContextMapper" />
	</beans:bean>

	<beans:bean id="permissionedUserContextMapper"
		class="...service.impl.PermissionedUserContextMapperImpl" >
		<beans:property name="userDao" ref="userDao"/>
	</beans:bean>		

	<!-- LDAP via AD-->
	<beans:bean id="bindAuthenticator"
		class="org.springframework.security.ldap.authentication.BindAuthenticator">
		<beans:constructor-arg ref="contextSource" />
		<beans:property name="userSearch" ref="userSearch" />
	</beans:bean>

	<beans:bean id="userSearch"
		class="org.springframework.security.ldap.search.FilterBasedLdapUserSearch">
		<beans:constructor-arg>
			<beans:value></beans:value>
		</beans:constructor-arg>
		<beans:constructor-arg>
			<beans:value>(sAMAccountName={0})</beans:value>
		</beans:constructor-arg>
		<beans:constructor-arg ref="contextSource" />
		<beans:property name="searchSubtree">
			<beans:value>true</beans:value>
		</beans:property>
	</beans:bean>

	<beans:bean id="contextSource"
		class="org.springframework.security.ldap.DefaultSpringSecurityContextSource">
		<beans:constructor-arg
			value="ldap://omitted" />
		<beans:property name="userDn"
			value="ommitted" />
		<beans:property name="password" value="omitted" />
	</beans:bean>
	
	<!--  Second LDAP Authenticator (Apache DS) -->
    <beans:bean id="externalUserLdapProvider" class="org.springframework.security.ldap.authentication.LdapAuthenticationProvider">
        <beans:constructor-arg ref="externalUserBindAuthenticator"/>
		<beans:constructor-arg ref="userService" />
		<beans:property name="userDetailsContextMapper" ref="permissionedUserContextMapper" />
    </beans:bean>

	<beans:bean id="externalUserBindAuthenticator" class="org.springframework.security.ldap.authentication.BindAuthenticator">
		<beans:constructor-arg ref="externalUserContextSource" />
		<beans:property name="userDnPatterns">
			<beans:list>
				<beans:value>cn={0},ou=Users</beans:value>
			</beans:list>
		</beans:property>
	</beans:bean>
	
	<beans:bean id="externalUserContextSource" 
			class="org.springframework.security.ldap.DefaultSpringSecurityContextSource">
     <beans:constructor-arg value="ldap://omitted"/>
	</beans:bean>

</beans:beans>

Am I missing some property that should tell the concurrency control strategy to barf if the user logs more than 1 session? I know the same user is logging more than one session -- as I am seeing duplicate principles in the session registry.

Any/all replies are very much appreciated! Thanks in advance!

[Rob Winch]

What UserDetails implementation does PermissionedUserContextMapperImpl return? Does the UserDetails implementation implement equals and hashCode properly?

[griff]

You were correct, my UserDetails object was not implementing the equals/hashCode/toString methods. Once added, it works as it should.

Thanks for the reply!