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	/*
	* Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.security.x509;

	import java.io.IOException;
	import java.lang.reflect.Constructor;
	import java.util.Arrays;

	import sun.security.util.*;

	/**
	* This class represents the OtherName as required by the GeneralNames
	* ASN.1 object. It supplies the generic framework to allow specific
	* Other Name types, and also provides minimal support for unrecognized
	* Other Name types.
	*
	* The ASN.1 definition for OtherName is:
	* <pre>
	* OtherName ::= SEQUENCE {
	* type-id OBJECT IDENTIFIER,
	* value [0] EXPLICIT ANY DEFINED BY type-id
	* }
	* </pre>
	* @author Hemma Prafullchandra
	*/
	public class OtherName implements GeneralNameInterface {

	private String name;
	private ObjectIdentifier oid;
	private byte[] nameValue = null;
	private GeneralNameInterface gni = null;

	private static final byte TAG_VALUE = 0;

	private int myhash = -1;

	/**
	* Create the OtherName object from a passed ObjectIdentfier and
	* byte array name value
	*
	* @param oid ObjectIdentifier of this OtherName object
	* @param value the DER-encoded value of the OtherName
	* @throws IOException on error
	*/
	public OtherName(ObjectIdentifier oid, byte[] value) throws IOException {
	if (oid == null \|\| value == null) {
	throw new NullPointerException("parameters may not be null");
	}
	this.oid = oid;
	this.nameValue = value;
	gni = getGNI(oid, value);
	if (gni != null) {
	name = gni.toString();
	} else {
	name = "Unrecognized ObjectIdentifier: " + oid.toString();
	}
	}

	/**
	* Create the OtherName object from the passed encoded Der value.
	*
	* @param derValue the encoded DER OtherName.
	* @exception IOException on error.
	*/
	public OtherName(DerValue derValue) throws IOException {
	DerInputStream in = derValue.toDerInputStream();

	oid = in.getOID();
	DerValue val = in.getDerValue();
	nameValue = val.toByteArray();
	gni = getGNI(oid, nameValue);
	if (gni != null) {
	name = gni.toString();
	} else {
	name = "Unrecognized ObjectIdentifier: " + oid.toString();
	}
	}

	/**
	* Get ObjectIdentifier
	*/
	public ObjectIdentifier getOID() {
	//XXXX May want to consider cloning this
	return oid;
	}

	/**
	* Get name value
	*/
	public byte[] getNameValue() {
	return nameValue.clone();
	}

	/**
	* Get GeneralNameInterface
	*/
	private GeneralNameInterface getGNI(ObjectIdentifier oid, byte[] nameValue)
	throws IOException {
	try {
	Class<?> extClass = OIDMap.getClass(oid);
	if (extClass == null) { // Unsupported OtherName
	return null;
	}
	Class<?>[] params = { Object.class };
	Constructor<?> cons = extClass.getConstructor(params);

	Object[] passed = new Object[] { nameValue };
	GeneralNameInterface gni =
	(GeneralNameInterface)cons.newInstance(passed);
	return gni;
	} catch (Exception e) {
	throw new IOException("Instantiation error: " + e, e);
	}
	}

	/**
	* Return the type of the GeneralName.
	*/
	public int getType() {
	return GeneralNameInterface.NAME_ANY;
	}

	/**
	* Encode the Other name into the DerOutputStream.
	*
	* @param out the DER stream to encode the Other-Name to.
	* @exception IOException on encoding errors.
	*/
	public void encode(DerOutputStream out) throws IOException {
	if (gni != null) {
	// This OtherName has a supported class
	gni.encode(out);
	return;
	} else {
	// This OtherName has no supporting class
	DerOutputStream tmp = new DerOutputStream();
	tmp.putOID(oid);
	tmp.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, TAG_VALUE), nameValue);
	out.write(DerValue.tag_Sequence, tmp);
	}
	}

	/**
	* Compares this name with another, for equality.
	*
	* @return true iff the names are identical.
	*/
	public boolean equals(Object other) {
	if (this == other) {
	return true;
	}
	if (!(other instanceof OtherName)) {
	return false;
	}
	OtherName otherOther = (OtherName)other;
	if (!(otherOther.oid.equals(oid))) {
	return false;
	}
	GeneralNameInterface otherGNI = null;
	try {
	otherGNI = getGNI(otherOther.oid, otherOther.nameValue);
	} catch (IOException ioe) {
	return false;
	}

	boolean result;
	if (otherGNI != null) {
	try {
	result = (otherGNI.constrains(this) == NAME_MATCH);
	} catch (UnsupportedOperationException ioe) {
	result = false;
	}
	} else {
	result = Arrays.equals(nameValue, otherOther.nameValue);
	}

	return result;
	}

	/**
	* Returns the hash code for this OtherName.
	*
	* @return a hash code value.
	*/
	public int hashCode() {
	if (myhash == -1) {
	myhash = 37 + oid.hashCode();
	for (int i = 0; i < nameValue.length; i++) {
	myhash = 37 * myhash + nameValue[i];
	}
	}
	return myhash;
	}

	/**
	* Convert the name into user readable string.
	*/
	public String toString() {
	return "Other-Name: " + name;
	}

	/**
	* Return type of constraint inputName places on this name:<ul>
	* <li>NAME_DIFF_TYPE = -1: input name is different type from name
	* (i.e. does not constrain).
	* <li>NAME_MATCH = 0: input name matches name.
	* <li>NAME_NARROWS = 1: input name narrows name (is lower in the
	* naming subtree)
	* <li>NAME_WIDENS = 2: input name widens name (is higher in the
	* naming subtree)
	* <li>NAME_SAME_TYPE = 3: input name does not match or narrow name,
	* but is same type.
	* </ul>. These results are used in checking NameConstraints during
	* certification path verification.
	*
	* @param inputName to be checked for being constrained
	* @return constraint type above
	* @throws UnsupportedOperationException if name is same type, but
	* comparison operations are not supported for this name type.
	*/
	public int constrains(GeneralNameInterface inputName) {
	int constraintType;
	if (inputName == null) {
	constraintType = NAME_DIFF_TYPE;
	} else if (inputName.getType() != NAME_ANY) {
	constraintType = NAME_DIFF_TYPE;
	} else {
	throw new UnsupportedOperationException("Narrowing, widening, "
	+ "and matching are not supported for OtherName.");
	}
	return constraintType;
	}

	/**
	* Return subtree depth of this name for purposes of determining
	* NameConstraints minimum and maximum bounds.
	*
	* @return distance of name from root
	* @throws UnsupportedOperationException if not supported for this name type
	*/
	public int subtreeDepth() {
	throw new UnsupportedOperationException
	("subtreeDepth() not supported for generic OtherName");
	}

	}

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