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    1   /* Copyright 2004, 2005 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.salt;
    17
    18  import org.acegisecurity.providers.dao.SaltSource;
    19  import org.acegisecurity.userdetails.UserDetails;
    20
    21  import org.springframework.beans.factory.InitializingBean;
    22
    23
    24  /***
    25   * Uses a static system-wide <code>String</code> as the salt.
    26   *
    27   * <P>
    28   * Does not supply a different salt for each {@link User}. This means users
    29   * sharing the same password will still have the same digested password. Of
    30   * benefit is the digested passwords will at least be more protected than if
    31   * stored without any salt.
    32   * </p>
    33   *
    34   * @author Ben Alex
    35   * @version $Id: SystemWideSaltSource.java,v 1.6 2005/11/29 13:10:12 benalex Exp $
    36   */
    37  public class SystemWideSaltSource implements SaltSource, InitializingBean {
    38      //~ Instance fields ========================================================
    39
    40      private String systemWideSalt;
    41
    42      //~ Methods ================================================================
    43
    44      public Object getSalt(UserDetails user) {
    45          return this.systemWideSalt;
    46      }
    47
    48      public void setSystemWideSalt(String systemWideSalt) {
    49          this.systemWideSalt = systemWideSalt;
    50      }
    51
    52      public String getSystemWideSalt() {
    53          return this.systemWideSalt;
    54      }
    55
    56      public void afterPropertiesSet() throws Exception {
    57          if ((this.systemWideSalt == null) || "".equals(this.systemWideSalt)) {
    58              throw new IllegalArgumentException("A systemWideSalt must be set");
    59          }
    60      }
    61  }