Spring Security FAQ

@Test
public void ldapAuthenticationIsSuccessful() throws Exception {
		Hashtable<String,String> env = new Hashtable<String,String>();
		env.put(Context.SECURITY_AUTHENTICATION, "simple");
		env.put(Context.SECURITY_PRINCIPAL, "cn=joe,ou=users,dc=mycompany,dc=com");
		env.put(Context.PROVIDER_URL, "ldap://mycompany.com:389/dc=mycompany,dc=com");
		env.put(Context.SECURITY_CREDENTIALS, "joespassword");
		env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");

		InitialLdapContext ctx = new InitialLdapContext(env, null);

}

@Test
fun ldapAuthenticationIsSuccessful() {
    val env = Hashtable<String, String>()
    env[Context.SECURITY_AUTHENTICATION] = "simple"
    env[Context.SECURITY_PRINCIPAL] = "cn=joe,ou=users,dc=mycompany,dc=com"
    env[Context.PROVIDER_URL] = "ldap://mycompany.com:389/dc=mycompany,dc=com"
    env[Context.SECURITY_CREDENTIALS] = "joespassword"
    env[Context.INITIAL_CONTEXT_FACTORY] = "com.sun.jndi.ldap.LdapCtxFactory"
    val ctx = InitialLdapContext(env, null)
}

	public class MyFilterSecurityMetadataSource implements FilterInvocationSecurityMetadataSource {

		public List<ConfigAttribute> getAttributes(Object object) {
			FilterInvocation fi = (FilterInvocation) object;
				String url = fi.getRequestUrl();
				String httpMethod = fi.getRequest().getMethod();
				List<ConfigAttribute> attributes = new ArrayList<ConfigAttribute>();

				// Lookup your database (or other source) using this information and populate the
				// list of attributes

				return attributes;
		}

		public Collection<ConfigAttribute> getAllConfigAttributes() {
			return null;
		}

		public boolean supports(Class<?> clazz) {
			return FilterInvocation.class.isAssignableFrom(clazz);
		}
	}

class MyFilterSecurityMetadataSource : FilterInvocationSecurityMetadataSource {
    override fun getAttributes(securedObject: Any): List<ConfigAttribute> {
        val fi = securedObject as FilterInvocation
        val url = fi.requestUrl
        val httpMethod = fi.request.method

        // Lookup your database (or other source) using this information and populate the
        // list of attributes
        return ArrayList()
    }

    override fun getAllConfigAttributes(): Collection<ConfigAttribute>? {
        return null
    }

    override fun supports(clazz: Class<*>): Boolean {
        return FilterInvocation::class.java.isAssignableFrom(clazz)
    }
}

public class MyAuthoritiesPopulator implements LdapAuthoritiesPopulator {
    @Autowired
    JdbcTemplate template;

    List<GrantedAuthority> getGrantedAuthorities(DirContextOperations userData, String username) {
        return template.query("select role from roles where username = ?",
                new String[] {username},
                new RowMapper<GrantedAuthority>() {
             /**
             *  We're assuming here that you're using the standard convention of using the role
             *  prefix "ROLE_" to mark attributes which are supported by Spring Security's RoleVoter.
             */
            @Override
            public GrantedAuthority mapRow(ResultSet rs, int rowNum) throws SQLException {
                return new SimpleGrantedAuthority("ROLE_" + rs.getString(1));
            }
        });
    }
}

class MyAuthoritiesPopulator : LdapAuthoritiesPopulator {
    @Autowired
    lateinit var template: JdbcTemplate

    override fun getGrantedAuthorities(userData: DirContextOperations, username: String): MutableList<GrantedAuthority?> {
        return template.query("select role from roles where username = ?",
            arrayOf(username)
        ) { rs, _ ->
            /**
             * We're assuming here that you're using the standard convention of using the role
             * prefix "ROLE_" to mark attributes which are supported by Spring Security's RoleVoter.
             */
            SimpleGrantedAuthority("ROLE_" + rs.getString(1))
        }
    }
}

public class CustomBeanPostProcessor implements BeanPostProcessor {

		public Object postProcessAfterInitialization(Object bean, String name) {
				if (bean instanceof UsernamePasswordAuthenticationFilter) {
						System.out.println("********* Post-processing " + name);
						((UsernamePasswordAuthenticationFilter)bean).setAuthenticationDetailsSource(
										new AuthenticationDetailsSource() {
												public Object buildDetails(Object context) {
														return ((HttpServletRequest)context).getHeader("CUSTOM_HEADER");
												}
										});
				}
				return bean;
		}

		public Object postProcessBeforeInitialization(Object bean, String name) {
				return bean;
		}
}

class CustomBeanPostProcessor : BeanPostProcessor {
    override fun postProcessAfterInitialization(bean: Any, name: String): Any {
        if (bean is UsernamePasswordAuthenticationFilter) {
            println("********* Post-processing $name")
            bean.setAuthenticationDetailsSource(
                AuthenticationDetailsSource<HttpServletRequest, Any?> { context -> context.getHeader("CUSTOM_HEADER") })
        }
        return bean
    }

    override fun postProcessBeforeInitialization(bean: Any, name: String?): Any {
        return bean
    }
}