/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.ldap.authentication;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.ldap.userdetails.LdapUserDetails;
import org.springframework.ldap.core.AuthenticationSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* An AuthenticationSource to retrieve authentication information stored in Spring
* Security's {@link SecurityContextHolder}.
* <p>
* This is a copy of Spring LDAP's AcegiAuthenticationSource, updated for use with Spring
* Security 2.0.
*
* @author Mattias Arthursson
* @author Luke Taylor
* @since 2.0
*/
public class SpringSecurityAuthenticationSource implements AuthenticationSource {
private static final Log log = LogFactory
.getLog(SpringSecurityAuthenticationSource.class);
/**
* Get the principals of the logged in user, in this case the distinguished name.
*
* @return the distinguished name of the logged in user.
*/
public String getPrincipal() {
Authentication authentication = SecurityContextHolder.getContext()
.getAuthentication();
if (authentication == null) {
log.warn("No Authentication object set in SecurityContext - returning empty String as Principal");
return "";
}
Object principal = authentication.getPrincipal();
if (principal instanceof LdapUserDetails) {
LdapUserDetails details = (LdapUserDetails) principal;
return details.getDn();
}
else if (authentication instanceof AnonymousAuthenticationToken) {
if (log.isDebugEnabled()) {
log.debug("Anonymous Authentication, returning empty String as Principal");
}
return "";
}
else {
throw new IllegalArgumentException(
"The principal property of the authentication object"
+ "needs to be an LdapUserDetails.");
}
}
/**
* @see org.springframework.ldap.core.AuthenticationSource#getCredentials()
*/
public String getCredentials() {
Authentication authentication = SecurityContextHolder.getContext()
.getAuthentication();
if (authentication == null) {
log.warn("No Authentication object set in SecurityContext - returning empty String as Credentials");
return "";
}
return (String) authentication.getCredentials();
}
}