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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.
	*/
	package com.sun.org.apache.xml.internal.security.algorithms;

	import java.util.Map;
	import java.util.concurrent.ConcurrentHashMap;

	import com.sun.org.apache.xml.internal.security.signature.XMLSignature;
	import com.sun.org.apache.xml.internal.security.utils.JavaUtils;
	import org.w3c.dom.Element;


	/**
	* This class maps algorithm identifier URIs to JAVA JCE class names.
	*/
	public class JCEMapper {

	private static final com.sun.org.slf4j.internal.Logger LOG =
	com.sun.org.slf4j.internal.LoggerFactory.getLogger(JCEMapper.class);

	private static Map<String, Algorithm> algorithmsMap =
	new ConcurrentHashMap<String, Algorithm>();

	private static String providerName;

	/**
	* Method register
	*
	* @param id
	* @param algorithm
	* @throws SecurityException if a security manager is installed and the
	* caller does not have permission to register the JCE algorithm
	*/
	public static void register(String id, Algorithm algorithm) {
	JavaUtils.checkRegisterPermission();
	algorithmsMap.put(id, algorithm);
	}

	/**
	* This method registers the default algorithms.
	*/
	public static void registerDefaultAlgorithms() {
	// Digest algorithms
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_NOT_RECOMMENDED_MD5,
	new Algorithm("", "MD5", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_RIPEMD160,
	new Algorithm("", "RIPEMD160", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA1,
	new Algorithm("", "SHA-1", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA224,
	new Algorithm("", "SHA-224", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA256,
	new Algorithm("", "SHA-256", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA384,
	new Algorithm("", "SHA-384", "MessageDigest")
	);
	algorithmsMap.put(
	MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA512,
	new Algorithm("", "SHA-512", "MessageDigest")
	);
	// Signature algorithms
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_DSA,
	new Algorithm("DSA", "SHA1withDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_DSA_SHA256,
	new Algorithm("DSA", "SHA256withDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_NOT_RECOMMENDED_RSA_MD5,
	new Algorithm("RSA", "MD5withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_RIPEMD160,
	new Algorithm("RSA", "RIPEMD160withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA1,
	new Algorithm("RSA", "SHA1withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA224,
	new Algorithm("RSA", "SHA224withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA256,
	new Algorithm("RSA", "SHA256withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA384,
	new Algorithm("RSA", "SHA384withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA512,
	new Algorithm("RSA", "SHA512withRSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA1_MGF1,
	new Algorithm("RSA", "SHA1withRSAandMGF1", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA224_MGF1,
	new Algorithm("RSA", "SHA224withRSAandMGF1", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA256_MGF1,
	new Algorithm("RSA", "SHA256withRSAandMGF1", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA384_MGF1,
	new Algorithm("RSA", "SHA384withRSAandMGF1", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA512_MGF1,
	new Algorithm("RSA", "SHA512withRSAandMGF1", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA1,
	new Algorithm("EC", "SHA1withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA224,
	new Algorithm("EC", "SHA224withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA256,
	new Algorithm("EC", "SHA256withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA384,
	new Algorithm("EC", "SHA384withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA512,
	new Algorithm("EC", "SHA512withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_SIGNATURE_ECDSA_RIPEMD160,
	new Algorithm("EC", "RIPEMD160withECDSA", "Signature")
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_NOT_RECOMMENDED_MD5,
	new Algorithm("", "HmacMD5", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_RIPEMD160,
	new Algorithm("", "HMACRIPEMD160", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_SHA1,
	new Algorithm("", "HmacSHA1", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_SHA224,
	new Algorithm("", "HmacSHA224", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_SHA256,
	new Algorithm("", "HmacSHA256", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_SHA384,
	new Algorithm("", "HmacSHA384", "Mac", 0, 0)
	);
	algorithmsMap.put(
	XMLSignature.ALGO_ID_MAC_HMAC_SHA512,
	new Algorithm("", "HmacSHA512", "Mac", 0, 0)
	);
	}

	/**
	* Method translateURItoJCEID
	*
	* @param algorithmURI
	* @return the JCE standard name corresponding to the given URI
	*/
	public static String translateURItoJCEID(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.jceName;
	}
	return null;
	}

	/**
	* Method getAlgorithmClassFromURI
	* @param algorithmURI
	* @return the class name that implements this algorithm
	*/
	public static String getAlgorithmClassFromURI(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.algorithmClass;
	}
	return null;
	}

	/**
	* Returns the keylength in bits for a particular algorithm.
	*
	* @param algorithmURI
	* @return The length of the key used in the algorithm
	*/
	public static int getKeyLengthFromURI(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.keyLength;
	}
	return 0;
	}

	public static int getIVLengthFromURI(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.ivLength;
	}
	return 0;
	}

	/**
	* Method getJCEKeyAlgorithmFromURI
	*
	* @param algorithmURI
	* @return The KeyAlgorithm for the given URI.
	*/
	public static String getJCEKeyAlgorithmFromURI(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.requiredKey;
	}
	return null;
	}

	/**
	* Method getJCEProviderFromURI
	*
	* @param algorithmURI
	* @return The JCEProvider for the given URI.
	*/
	public static String getJCEProviderFromURI(String algorithmURI) {
	Algorithm algorithm = getAlgorithm(algorithmURI);
	if (algorithm != null) {
	return algorithm.jceProvider;
	}
	return null;
	}

	/**
	* Method getAlgorithm
	*
	* @param algorithmURI
	* @return The Algorithm object for the given URI.
	*/
	private static Algorithm getAlgorithm(String algorithmURI) {
	LOG.debug("Request for URI {}", algorithmURI);

	if (algorithmURI != null) {
	return algorithmsMap.get(algorithmURI);
	}
	return null;
	}

	/**
	* Gets the default Provider for obtaining the security algorithms
	* @return the default providerId.
	*/
	public static String getProviderId() {
	return providerName;
	}

	/**
	* Sets the default Provider for obtaining the security algorithms
	* @param provider the default providerId.
	* @throws SecurityException if a security manager is installed and the
	* caller does not have permission to register the JCE algorithm
	*/
	public static void setProviderId(String provider) {
	JavaUtils.checkRegisterPermission();
	providerName = provider;
	}

	/**
	* Represents the Algorithm xml element
	*/
	public static class Algorithm {

	final String requiredKey;
	final String jceName;
	final String algorithmClass;
	final int keyLength;
	final int ivLength;
	final String jceProvider;

	/**
	* Gets data from element
	* @param el
	*/
	public Algorithm(Element el) {
	requiredKey = el.getAttributeNS(null, "RequiredKey");
	jceName = el.getAttributeNS(null, "JCEName");
	algorithmClass = el.getAttributeNS(null, "AlgorithmClass");
	jceProvider = el.getAttributeNS(null, "JCEProvider");
	if (el.hasAttribute("KeyLength")) {
	keyLength = Integer.parseInt(el.getAttributeNS(null, "KeyLength"));
	} else {
	keyLength = 0;
	}
	if (el.hasAttribute("IVLength")) {
	ivLength = Integer.parseInt(el.getAttributeNS(null, "IVLength"));
	} else {
	ivLength = 0;
	}
	}

	public Algorithm(String requiredKey, String jceName) {
	this(requiredKey, jceName, null, 0, 0);
	}

	public Algorithm(String requiredKey, String jceName, String algorithmClass) {
	this(requiredKey, jceName, algorithmClass, 0, 0);
	}

	public Algorithm(String requiredKey, String jceName, int keyLength) {
	this(requiredKey, jceName, null, keyLength, 0);
	}

	public Algorithm(String requiredKey, String jceName, String algorithmClass, int keyLength, int ivLength) {
	this(requiredKey, jceName, algorithmClass, keyLength, ivLength, null);
	}

	public Algorithm(String requiredKey, String jceName,
	String algorithmClass, int keyLength, int ivLength, String jceProvider) {
	this.requiredKey = requiredKey;
	this.jceName = jceName;
	this.algorithmClass = algorithmClass;
	this.keyLength = keyLength;
	this.ivLength = ivLength;
	this.jceProvider = jceProvider;
	}
	}
	}

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