1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.server.kerberos.sam;
21
22
23 import javax.security.auth.kerberos.KerberosKey;
24
25
26 /**
27 * Checks the integrity of a kerberos key to decode-decrypt an encrypted
28 * generalized timestamp representing the pre-auth data.
29 *
30 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
31 */
32 public interface KeyIntegrityChecker
33 {
34 /**
35 * Checks the integrity of a KerberosKey to decrypt-decode and compare an
36 * encrypted encoded generalized timestamp representing the preauth data.
37 *
38 * @param preauthData the generalized timestamp encrypted with client hotp
39 * generated KerberosKey
40 * @param key the KerberosKey generated from server side hotp value
41 * @return true if the key can decrypt-decode and make sense out of the
42 * timestamp verifying that it is in skew, false otherwise
43 */
44 boolean checkKeyIntegrity( byte[] preauthData, KerberosKey key );
45 }