Untitled

Username Password Authentication in Spring Security
<beans:bean id="myProvider" class="com.example.MyProvider"></beans:bean>

<authentication-manager>
    <authentication-provider ref="myProvider"></authentication-provider>
</authentication-manager>

public UserDetails loadUserByUsername(String username)

public Collection<GrantedAuthority> getAuthorities()

<http auto-config="true">
    <intercept-url pattern="/admin/**" access="IS_AUTHENTICATED_REMEMBERED"/>
    <intercept-url pattern="/welcome/**" access="IS_AUTHENTICATED_REMEMBERED" />
    <intercept-url pattern="/**" access="IS_AUTHENTICATED_ANONYMOUSLY" />
    <form-login login-page="/login" />
    <logout logout-success-url="/" logout-url="/logout" />
    <!-- Limits the number of concurent sessions a user can have
    <concurrent-session-control max-sessions="1" exception-if-maximum-exceeded="true"/>
-->
</http>


<!--
Usernames/Passwords are
    rod/koala
    dianne/emu
    scott/wombat
-->

<authentication-manager>
    <authentication-provider>
        <password-encoder hash="md5"/>
        <user-service>
            <user name="rod" password="a564de63c2d0da68cf47586ee05984d7" authorities="ROLE_SUPERVISOR, ROLE_USER, ROLE_TELLER" />
            <user name="dianne" password="65d15fe9156f9c4bbffd98085992a44e" authorities="ROLE_USER,ROLE_TELLER" />
            <user name="scott" password="2b58af6dddbd072ed27ffc86725d7d3a" authorities="ROLE_USER" />
        </user-service>
    </authentication-provider>
</authentication-manager>

<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
  <filter-name>springSecurityFilterChain</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
    <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
</listener>

<beans:bean id="authenticationManager"
     class="org.springframework.security.authentication.ProviderManager">

  <beans:property name="providers">
    <beans:list>
      <beans:ref local="myAuthenticationProvider"/>
    </beans:list>
  </beans:property>
</beans:bean>

<beans:bean id="myAuthenticationProvider" class="com.example.MyAuthenticationProvider">
</beans:bean>

<authentication-manager>
    <authentication-provider ref="myAuthenticationProvider"/>
</authentication-manager>

public class AConnexAuthenticationProvider implements AuthenticationProvider {

    static final List<GrantedAuthority> AUTHORITIES = new ArrayList<GrantedAuthority>();

    static {
      AUTHORITIES.add(new GrantedAuthorityImpl("ROLE_USER"));
    }

    @Override
    public Authentication authenticate(Authentication auth)
            throws AuthenticationException {
        return new UsernamePasswordAuthenticationToken(auth.getName(), auth.getCredentials(), AUTHORITIES);
    }

    @Override
    public boolean supports(Class<? extends Object> paramClass) {
        return true;
    }
}