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/* Copyright 2004 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.dao;

import org.acegisecurity.userdetails.UserDetails;


/**
 * Provides alternative sources of the salt to use for encoding passwords.
 *
 * @author Ben Alex
 * @version $Id: SaltSource.java,v 1.5 2005/11/29 13:10:08 benalex Exp $
 */
public interface SaltSource {
    //~ Methods ================================================================

    /**
     * Returns the salt to use for the indicated user.
     *
     * @param user from the AuthenticationDao
     *
     * @return the salt to use for this UserDetails
     */
    public Object getSalt(UserDetails user);
}