/* * 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 java.util.Iterator; import java.util.List; import org.apache.harmony.security.asn1.ASN1Oid; import org.apache.harmony.security.asn1.ASN1SequenceOf; import org.apache.harmony.security.asn1.ASN1Type; import org.apache.harmony.security.asn1.BerInputStream; import org.apache.harmony.security.asn1.ObjectIdentifier; /** * Extended Key Usage Extension (OID == 2.5.29.37). * * The ASN.1 definition for Extended Key Usage Extension is: * *
 *  id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 }
 *
 *  ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
 *
 *  KeyPurposeId ::= OBJECT IDENTIFIER
 * 
* (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt */ public final class ExtendedKeyUsage extends ExtensionValue { // the value of extension private List keys; /** * Creates the extension object on the base of its encoded form. */ public ExtendedKeyUsage(byte[] encoding) { super(encoding); } /** * Returns the list of string representation of OIDs corresponding * to key purpose IDs. */ public List getExtendedKeyUsage() throws IOException { if (keys == null) { keys = (List) ASN1.decode(getEncoded()); } return keys; } @Override public byte[] getEncoded() { if (encoding == null) { encoding = ASN1.encode(keys); } return encoding; } @Override public void dumpValue(StringBuilder sb, String prefix) { sb.append(prefix).append("Extended Key Usage: "); if (keys == null) { try { keys = getExtendedKeyUsage(); } catch (IOException e) { // incorrect extension value encoding super.dumpValue(sb); return; } } sb.append('['); for (Iterator it = keys.iterator(); it.hasNext();) { sb.append(" \"").append(it.next()).append('"'); if (it.hasNext()) { sb.append(','); } } sb.append(" ]\n"); } /** * ASN.1 Encoder/Decoder. */ public static final ASN1Type ASN1 = new ASN1SequenceOf(new ASN1Oid() { public Object getDecodedObject(BerInputStream in) throws IOException { int[] oid = (int[]) super.getDecodedObject(in); return ObjectIdentifier.toString(oid); } }); }