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	/*
	* reserved comment block
	* DO NOT REMOVE OR ALTER!
	*/
	/**
	* 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.
	*/
	/*
	* Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
	*/
	/*
	* $Id: DOMPGPData.java 1788465 2017-03-24 15:10:51Z coheigea $
	*/
	package org.jcp.xml.dsig.internal.dom;

	import java.util.*;

	import javax.xml.crypto.*;
	import javax.xml.crypto.dsig.XMLSignature;
	import javax.xml.crypto.dsig.keyinfo.PGPData;

	import org.w3c.dom.Element;
	import org.w3c.dom.Node;

	import com.sun.org.apache.xml.internal.security.utils.XMLUtils;

	/**
	* DOM-based implementation of PGPData.
	*
	*/
	public final class DOMPGPData extends BaseStructure implements PGPData {

	private final byte[] keyId;
	private final byte[] keyPacket;
	private final List<XMLStructure> externalElements;

	/**
	* Creates a {@code DOMPGPData} containing the specified key packet.
	* and optional list of external elements.
	*
	* @param keyPacket a PGP Key Material Packet as defined in section 5.5 of
	* <a href="http://www.ietf.org/rfc/rfc2440.txt">RFC 2440</a>. The
	* array is cloned to prevent subsequent modification.
	* @param other a list of {@link XMLStructure}s representing elements from
	* an external namespace. The list is defensively copied to prevent
	* subsequent modification. May be {@code null} or empty.
	* @throws NullPointerException if {@code keyPacket} is
	* {@code null}
	* @throws IllegalArgumentException if the key packet is not in the
	* correct format
	* @throws ClassCastException if {@code other} contains any
	* entries that are not of type {@link XMLStructure}
	*/
	public DOMPGPData(byte[] keyPacket, List<? extends XMLStructure> other) {
	if (keyPacket == null) {
	throw new NullPointerException("keyPacket cannot be null");
	}
	if (other == null \|\| other.isEmpty()) {
	this.externalElements = Collections.emptyList();
	} else {
	this.externalElements =
	Collections.unmodifiableList(new ArrayList<>(other));
	for (int i = 0, size = this.externalElements.size(); i < size; i++) {
	if (!(this.externalElements.get(i) instanceof XMLStructure)) {
	throw new ClassCastException
	("other["+i+"] is not a valid PGPData type");
	}
	}
	}
	this.keyPacket = keyPacket.clone();
	checkKeyPacket(keyPacket);
	this.keyId = null;
	}

	/**
	* Creates a {@code DOMPGPData} containing the specified key id and
	* optional key packet and list of external elements.
	*
	* @param keyId a PGP public key id as defined in section 11.2 of
	* <a href="http://www.ietf.org/rfc/rfc2440.txt">RFC 2440</a>. The
	* array is cloned to prevent subsequent modification.
	* @param keyPacket a PGP Key Material Packet as defined in section 5.5 of
	* <a href="http://www.ietf.org/rfc/rfc2440.txt">RFC 2440</a> (may
	* be {@code null}). The array is cloned to prevent subsequent
	* modification.
	* @param other a list of {@link XMLStructure}s representing elements from
	* an external namespace. The list is defensively copied to prevent
	* subsequent modification. May be {@code null} or empty.
	* @throws NullPointerException if {@code keyId} is {@code null}
	* @throws IllegalArgumentException if the key id or packet is not in the
	* correct format
	* @throws ClassCastException if {@code other} contains any
	* entries that are not of type {@link XMLStructure}
	*/
	public DOMPGPData(byte[] keyId, byte[] keyPacket,
	List<? extends XMLStructure> other)
	{
	if (keyId == null) {
	throw new NullPointerException("keyId cannot be null");
	}
	// key ids must be 8 bytes
	if (keyId.length != 8) {
	throw new IllegalArgumentException("keyId must be 8 bytes long");
	}
	if (other == null \|\| other.isEmpty()) {
	this.externalElements = Collections.emptyList();
	} else {
	this.externalElements =
	Collections.unmodifiableList(new ArrayList<>(other));
	for (int i = 0, size = this.externalElements.size(); i < size; i++) {
	if (!(this.externalElements.get(i) instanceof XMLStructure)) {
	throw new ClassCastException
	("other["+i+"] is not a valid PGPData type");
	}
	}
	}
	this.keyId = keyId.clone();
	this.keyPacket = keyPacket == null ? null
	: keyPacket.clone();
	if (keyPacket != null) {
	checkKeyPacket(keyPacket);
	}
	}

	/**
	* Creates a {@code DOMPGPData} from an element.
	*
	* @param pdElem a PGPData element
	*/
	public DOMPGPData(Element pdElem) throws MarshalException {
	// get all children nodes
	byte[] pgpKeyId = null;
	byte[] pgpKeyPacket = null;

	List<XMLStructure> other = new ArrayList<>();
	Node firstChild = pdElem.getFirstChild();
	while (firstChild != null) {
	if (firstChild.getNodeType() == Node.ELEMENT_NODE) {
	Element childElem = (Element)firstChild;
	String localName = childElem.getLocalName();
	String namespace = childElem.getNamespaceURI();
	if ("PGPKeyID".equals(localName) && XMLSignature.XMLNS.equals(namespace)) {
	String content = XMLUtils.getFullTextChildrenFromElement(childElem);
	pgpKeyId = Base64.getMimeDecoder().decode(content);
	} else if ("PGPKeyPacket".equals(localName) && XMLSignature.XMLNS.equals(namespace)) {
	String content = XMLUtils.getFullTextChildrenFromElement(childElem);
	pgpKeyPacket = Base64.getMimeDecoder().decode(content);
	} else {
	other.add
	(new javax.xml.crypto.dom.DOMStructure(childElem));
	}
	}
	firstChild = firstChild.getNextSibling();
	}
	this.keyId = pgpKeyId;
	this.keyPacket = pgpKeyPacket;
	this.externalElements = Collections.unmodifiableList(other);
	}

	@Override
	public byte[] getKeyId() {
	return keyId == null ? null : keyId.clone();
	}

	@Override
	public byte[] getKeyPacket() {
	return keyPacket == null ? null : keyPacket.clone();
	}

	@Override
	public List<XMLStructure> getExternalElements() {
	return externalElements;
	}

	/**
	* We assume packets use the new format packet syntax, as specified in
	* section 4 of RFC 2440.
	*
	* This method only checks if the packet contains a valid tag. The
	* contents of the packet should be checked by the application.
	*/
	private void checkKeyPacket(byte[] keyPacket) {
	// length must be at least 3 (one byte for tag, one byte for length,
	// and minimally one byte of content
	if (keyPacket.length < 3) {
	throw new IllegalArgumentException("keypacket must be at least " +
	"3 bytes long");
	}

	int tag = keyPacket[0];
	// first bit must be set
	if ((tag & 128) != 128) {
	throw new IllegalArgumentException("keypacket tag is invalid: " +
	"bit 7 is not set");
	}
	// make sure using new format
	if ((tag & 64) != 64) {
	throw new IllegalArgumentException("old keypacket tag format is " +
	"unsupported");
	}

	// tag value must be 6, 14, 5 or 7
	if ((tag & 6) != 6 && (tag & 14) != 14 &&
	(tag & 5) != 5 && (tag & 7) != 7) {
	throw new IllegalArgumentException("keypacket tag is invalid: " +
	"must be 6, 14, 5, or 7");
	}
	}
	}

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