/*
* 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.
*/
/*
* Imported by CG 20090321 based on Apache Harmony ("enhanced") revision 541025.
*/
package org.apache.harmony.security.x509;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import org.apache.harmony.security.asn1.ASN1Type;
import org.apache.harmony.security.asn1.ASN1SequenceOf;
import org.apache.harmony.security.asn1.ASN1Oid;
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:
*
* <pre>
* id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 }
*
* ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
*
* KeyPurposeId ::= OBJECT IDENTIFIER
* </pre>
* (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt
*/
public class ExtendedKeyUsage extends ExtensionValue {
// the value of extension
private List keys;
/**
* Creates an object on the base of list of integer arrays representing
* key purpose IDs.
*/
public ExtendedKeyUsage(List keys) {
this.keys = 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;
}
/**
* Returns the encoded form of the object.
*/
public byte[] getEncoded() {
if (encoding == null) {
encoding = ASN1.encode(keys);
}
return encoding;
}
/**
* Places the string representation of extension value
* into the StringBuffer object.
*/
public void dumpValue(StringBuffer buffer, String prefix) {
buffer.append(prefix).append("Extended Key Usage: "); //$NON-NLS-1$
if (keys == null) {
try {
keys = getExtendedKeyUsage();
} catch (IOException e) {
// incorrect extension value encoding
super.dumpValue(buffer);
return;
}
}
buffer.append('[');
for (Iterator it=keys.iterator(); it.hasNext();) {
buffer.append(" \"").append(it.next()).append('"'); //$NON-NLS-1$
if (it.hasNext()) {
buffer.append(',');
}
}
buffer.append(" ]\n"); //$NON-NLS-1$
}
/**
* 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);
}
});
}