/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.apache.harmony.security.x509; import java.io.IOException; import org.apache.harmony.security.asn1.ASN1BitString; import org.apache.harmony.security.asn1.ASN1Type; /** * Key Usage Extension (OID = 2.5.29.15). * * The ASN.1 definition for Key Usage Extension is: * *
 * id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }
 *
 * KeyUsage ::= BIT STRING {
 *     digitalSignature        (0),
 *     nonRepudiation          (1),
 *     keyEncipherment         (2),
 *     dataEncipherment        (3),
 *     keyAgreement            (4),
 *     keyCertSign             (5),
 *     cRLSign                 (6),
 *     encipherOnly            (7),
 *     decipherOnly            (8)
 * }
 * 
* (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt) */ public final class KeyUsage extends ExtensionValue { /** The names of the usages. */ private static final String[] USAGES = { "digitalSignature", "nonRepudiation", "keyEncipherment", "dataEncipherment", "keyAgreement", "keyCertSign", "cRLSign", "encipherOnly", "decipherOnly", }; /** the value of extension */ private final boolean[] keyUsage; /** * Creates the extension object on the base of its encoded form. */ public KeyUsage(byte[] encoding) throws IOException { super(encoding); this.keyUsage = (boolean[]) ASN1.decode(encoding); } public boolean[] getKeyUsage() { return keyUsage; } @Override public byte[] getEncoded() { if (encoding == null) { encoding = ASN1.encode(keyUsage); } return encoding; } @Override public void dumpValue(StringBuilder sb, String prefix) { sb.append(prefix).append("KeyUsage [\n"); for (int i = 0; i < keyUsage.length; i++) { if (keyUsage[i]) { sb.append(prefix).append(" ").append(USAGES[i]).append('\n'); } } sb.append(prefix).append("]\n"); } /** * X.509 Extension value encoder/decoder. */ private static final ASN1Type ASN1 = new ASN1BitString.ASN1NamedBitList(9); }