001 /**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one or more
004 * contributor license agreements. See the NOTICE file distributed with
005 * this work for additional information regarding copyright ownership.
006 * The ASF licenses this file to You under the Apache License, Version 2.0
007 * (the "License"); you may not use this file except in compliance with
008 * the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package org.apache.geronimo.util.asn1.x509;
020
021 import org.apache.geronimo.util.asn1.DERBitString;
022
023 /**
024 * The KeyUsage object.
025 * <pre>
026 * id-ce-keyUsage OBJECT IDENTIFIER ::= { id-ce 15 }
027 *
028 * KeyUsage ::= BIT STRING {
029 * digitalSignature (0),
030 * nonRepudiation (1),
031 * keyEncipherment (2),
032 * dataEncipherment (3),
033 * keyAgreement (4),
034 * keyCertSign (5),
035 * cRLSign (6),
036 * encipherOnly (7),
037 * decipherOnly (8) }
038 * </pre>
039 */
040 public class KeyUsage
041 extends DERBitString
042 {
043 public static final int digitalSignature = (1 << 7);
044 public static final int nonRepudiation = (1 << 6);
045 public static final int keyEncipherment = (1 << 5);
046 public static final int dataEncipherment = (1 << 4);
047 public static final int keyAgreement = (1 << 3);
048 public static final int keyCertSign = (1 << 2);
049 public static final int cRLSign = (1 << 1);
050 public static final int encipherOnly = (1 << 0);
051 public static final int decipherOnly = (1 << 15);
052
053 /**
054 * Basic constructor.
055 *
056 * @param usage - the bitwise OR of the Key Usage flags giving the
057 * allowed uses for the key.
058 * e.g. (KeyUsage.keyEncipherment | KeyUsage.dataEncipherment)
059 */
060 public KeyUsage(
061 int usage)
062 {
063 super(getBytes(usage), getPadBits(usage));
064 }
065
066 public KeyUsage(
067 DERBitString usage)
068 {
069 super(usage.getBytes(), usage.getPadBits());
070 }
071
072 public String toString()
073 {
074 if (data.length == 1)
075 {
076 return "KeyUsage: 0x" + Integer.toHexString(data[0] & 0xff);
077 }
078 return "KeyUsage: 0x" + Integer.toHexString((data[1] & 0xff) << 8 | (data[0] & 0xff));
079 }
080 }