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    1   /* Copyright 2004 Acegi Technology Pty Limited
    2    *
    3    * Licensed under the Apache License, Version 2.0 (the "License");
    4    * you may not use this file except in compliance with the License.
    5    * You may obtain a copy of the License at
    6    *
    7    *     http://www.apache.org/licenses/LICENSE-2.0
    8    *
    9    * Unless required by applicable law or agreed to in writing, software
    10   * distributed under the License is distributed on an "AS IS" BASIS,
    11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12   * See the License for the specific language governing permissions and
    13   * limitations under the License.
    14   */
    15
    16  package org.acegisecurity.providers.dao;
    17
    18  import org.acegisecurity.userdetails.UserDetails;
    19
    20
    21  /***
    22   * Provides alternative sources of the salt to use for encoding passwords.
    23   *
    24   * @author Ben Alex
    25   * @version $Id: SaltSource.java,v 1.5 2005/11/29 13:10:08 benalex Exp $
    26   */
    27  public interface SaltSource {
    28      //~ Methods ================================================================
    29
    30      /***
    31       * Returns the salt to use for the indicated user.
    32       *
    33       * @param user from the <code>AuthenticationDao</code>
    34       *
    35       * @return the salt to use for this <code>UserDetails</code>
    36       */
    37      public Object getSalt(UserDetails user);
    38  }