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/* Copyright 2004, 2005 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.x509;

import org.acegisecurity.AuthenticationException;
import org.acegisecurity.userdetails.UserDetails;

import java.security.cert.X509Certificate;

/**
 * Populates the UserDetails associated with the X.509
 * certificate presented by a client.
 * 
 * Although the certificate will already have been validated by the web container,
 * implementations may choose to perform additional application-specific checks on
 * the certificate content here. If an implementation chooses to reject the certificate,
 * it should throw a {@link org.acegisecurity.BadCredentialsException}.
 * 
 *
 * @author Luke Taylor
 * @version $Id: X509AuthoritiesPopulator.java,v 1.5 2005/12/21 00:48:57 luke_t Exp $
 */
public interface X509AuthoritiesPopulator {
    /**
     * Obtains the granted authorities for the specified user.
     *
     * 
     * May throw any AuthenticationException or return
     * null if the authorities are unavailable.
     * 
     *
     * @param userCertificate the X.509 certificate supplied
     *
     * @return the details of the indicated user (at minimum the granted
     *         authorities and the username)
     *
     * @throws org.acegisecurity.AuthenticationException if the user details are not available
     *  or the certificate isn't valid for the application's purpose.
     */
    UserDetails getUserDetails(X509Certificate userCertificate)
        throws AuthenticationException;

}