/* 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.springframework.security.access.intercept;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.SpringSecurityMessageSource;
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 can authenticate a {@link RunAsUserToken}.<P>Configured in
* the bean context with a key that should match the key used by adapters to generate the <code>RunAsUserToken</code>.
* It treats as valid any <code>RunAsUserToken</code> instance presenting a hash code that matches the
* <code>RunAsImplAuthenticationProvider</code>-configured key.</p>
* <P>If the key does not match, a <code>BadCredentialsException</code> is thrown.</p>
*/
public class RunAsImplAuthenticationProvider implements InitializingBean, AuthenticationProvider, MessageSourceAware {
//~ Instance fields ================================================================================================
protected MessageSourceAccessor messages = SpringSecurityMessageSource.getAccessor();
private String key;
//~ Methods ========================================================================================================
public void afterPropertiesSet() throws Exception {
Assert.notNull(key, "A Key is required and should match that configured for the RunAsManagerImpl");
}
public Authentication authenticate(Authentication authentication)
throws AuthenticationException {
RunAsUserToken token = (RunAsUserToken) authentication;
if (token.getKeyHash() == key.hashCode()) {
return authentication;
} else {
throw new BadCredentialsException(messages.getMessage("RunAsImplAuthenticationProvider.incorrectKey",
"The presented RunAsUserToken does not contain the expected key"));
}
}
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 RunAsUserToken.class.isAssignableFrom(authentication);
}
}