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/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * 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.acegisecurity.providers.rememberme;

import org.acegisecurity.AcegiMessageSource;
import org.acegisecurity.Authentication;
import org.acegisecurity.AuthenticationException;
import org.acegisecurity.BadCredentialsException;

import org.acegisecurity.providers.AuthenticationProvider;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.InitializingBean;

import org.springframework.context.MessageSource;
import org.springframework.context.MessageSourceAware;
import org.springframework.context.support.MessageSourceAccessor;

import org.springframework.util.Assert;


/**
 * An {@link AuthenticationProvider} implementation that validates {@link
 * org.acegisecurity.providers.rememberme.RememberMeAuthenticationToken}s.

To be successfully validated, the * {@link org.acegisecurity.providers.rememberme.RememberMeAuthenticationToken#getKeyHash()} must match this class' * {@link #getKey()}.

*/ public class RememberMeAuthenticationProvider implements AuthenticationProvider, InitializingBean, MessageSourceAware { //~ Static fields/initializers ===================================================================================== private static final Log logger = LogFactory.getLog(RememberMeAuthenticationProvider.class); //~ Instance fields ================================================================================================ protected MessageSourceAccessor messages = AcegiMessageSource.getAccessor(); private String key; //~ Methods ======================================================================================================== public void afterPropertiesSet() throws Exception { Assert.hasLength(key); Assert.notNull(this.messages, "A message source must be set"); } public Authentication authenticate(Authentication authentication) throws AuthenticationException { if (!supports(authentication.getClass())) { return null; } if (this.key.hashCode() != ((RememberMeAuthenticationToken) authentication).getKeyHash()) { throw new BadCredentialsException(messages.getMessage("RememberMeAuthenticationProvider.incorrectKey", "The presented RememberMeAuthenticationToken does not contain the expected key")); } return authentication; } public String getKey() { return key; } public void setKey(String key) { this.key = key; } public void setMessageSource(MessageSource messageSource) { this.messages = new MessageSourceAccessor(messageSource); } public boolean supports(Class authentication) { return (RememberMeAuthenticationToken.class.isAssignableFrom(authentication)); } }




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