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	/*
	* Copyright (c) 1997, 2014, 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 com.sun.crypto.provider;

	import java.security.InvalidKeyException;
	import java.security.spec.KeySpec;
	import java.security.spec.InvalidKeySpecException;
	import javax.crypto.SecretKey;
	import javax.crypto.SecretKeyFactorySpi;
	import javax.crypto.spec.PBEKeySpec;
	import java.util.HashSet;
	import java.util.Locale;

	/**
	* This class implements a key factory for PBE keys according to PKCS#5,
	* meaning that the password must consist of printable ASCII characters
	* (values 32 to 126 decimal inclusive) and only the low order 8 bits
	* of each password character are used.
	*
	* @author Jan Luehe
	*
	*/
	abstract class PBEKeyFactory extends SecretKeyFactorySpi {

	private String type;
	private static HashSet<String> validTypes;

	/**
	* Simple constructor
	*/
	private PBEKeyFactory(String keytype) {
	type = keytype;
	}

	static {
	validTypes = new HashSet<>(17);
	validTypes.add("PBEWithMD5AndDES".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithSHA1AndDESede".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithSHA1AndRC2_40".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithSHA1AndRC2_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithSHA1AndRC4_40".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithSHA1AndRC4_128".toUpperCase(Locale.ENGLISH));
	// Proprietary algorithm.
	validTypes.add("PBEWithMD5AndTripleDES".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA1AndAES_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA224AndAES_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA256AndAES_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA384AndAES_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA512AndAES_128".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA1AndAES_256".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA224AndAES_256".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA256AndAES_256".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA384AndAES_256".toUpperCase(Locale.ENGLISH));
	validTypes.add("PBEWithHmacSHA512AndAES_256".toUpperCase(Locale.ENGLISH));
	}

	public static final class PBEWithMD5AndDES
	extends PBEKeyFactory {
	public PBEWithMD5AndDES() {
	super("PBEWithMD5AndDES");
	}
	}

	public static final class PBEWithSHA1AndDESede
	extends PBEKeyFactory {
	public PBEWithSHA1AndDESede() {
	super("PBEWithSHA1AndDESede");
	}
	}

	public static final class PBEWithSHA1AndRC2_40
	extends PBEKeyFactory {
	public PBEWithSHA1AndRC2_40() {
	super("PBEWithSHA1AndRC2_40");
	}
	}

	public static final class PBEWithSHA1AndRC2_128
	extends PBEKeyFactory {
	public PBEWithSHA1AndRC2_128() {
	super("PBEWithSHA1AndRC2_128");
	}
	}

	public static final class PBEWithSHA1AndRC4_40
	extends PBEKeyFactory {
	public PBEWithSHA1AndRC4_40() {
	super("PBEWithSHA1AndRC4_40");
	}
	}

	public static final class PBEWithSHA1AndRC4_128
	extends PBEKeyFactory {
	public PBEWithSHA1AndRC4_128() {
	super("PBEWithSHA1AndRC4_128");
	}
	}

	/*
	* Private proprietary algorithm for supporting JCEKS.
	*/
	public static final class PBEWithMD5AndTripleDES
	extends PBEKeyFactory {
	public PBEWithMD5AndTripleDES() {
	super("PBEWithMD5AndTripleDES");
	}
	}

	public static final class PBEWithHmacSHA1AndAES_128
	extends PBEKeyFactory {
	public PBEWithHmacSHA1AndAES_128() {
	super("PBEWithHmacSHA1AndAES_128");
	}
	}

	public static final class PBEWithHmacSHA224AndAES_128
	extends PBEKeyFactory {
	public PBEWithHmacSHA224AndAES_128() {
	super("PBEWithHmacSHA224AndAES_128");
	}
	}

	public static final class PBEWithHmacSHA256AndAES_128
	extends PBEKeyFactory {
	public PBEWithHmacSHA256AndAES_128() {
	super("PBEWithHmacSHA256AndAES_128");
	}
	}

	public static final class PBEWithHmacSHA384AndAES_128
	extends PBEKeyFactory {
	public PBEWithHmacSHA384AndAES_128() {
	super("PBEWithHmacSHA384AndAES_128");
	}
	}

	public static final class PBEWithHmacSHA512AndAES_128
	extends PBEKeyFactory {
	public PBEWithHmacSHA512AndAES_128() {
	super("PBEWithHmacSHA512AndAES_128");
	}
	}

	public static final class PBEWithHmacSHA1AndAES_256
	extends PBEKeyFactory {
	public PBEWithHmacSHA1AndAES_256() {
	super("PBEWithHmacSHA1AndAES_256");
	}
	}

	public static final class PBEWithHmacSHA224AndAES_256
	extends PBEKeyFactory {
	public PBEWithHmacSHA224AndAES_256() {
	super("PBEWithHmacSHA224AndAES_256");
	}
	}

	public static final class PBEWithHmacSHA256AndAES_256
	extends PBEKeyFactory {
	public PBEWithHmacSHA256AndAES_256() {
	super("PBEWithHmacSHA256AndAES_256");
	}
	}

	public static final class PBEWithHmacSHA384AndAES_256
	extends PBEKeyFactory {
	public PBEWithHmacSHA384AndAES_256() {
	super("PBEWithHmacSHA384AndAES_256");
	}
	}

	public static final class PBEWithHmacSHA512AndAES_256
	extends PBEKeyFactory {
	public PBEWithHmacSHA512AndAES_256() {
	super("PBEWithHmacSHA512AndAES_256");
	}
	}

	/**
	* Generates a <code>SecretKey</code> object from the provided key
	* specification (key material).
	*
	* @param keySpec the specification (key material) of the secret key
	*
	* @return the secret key
	*
	* @exception InvalidKeySpecException if the given key specification
	* is inappropriate for this key factory to produce a public key.
	*/
	protected SecretKey engineGenerateSecret(KeySpec keySpec)
	throws InvalidKeySpecException
	{
	if (!(keySpec instanceof PBEKeySpec)) {
	throw new InvalidKeySpecException("Invalid key spec");
	}
	return new PBEKey((PBEKeySpec)keySpec, type);
	}

	/**
	* Returns a specification (key material) of the given key
	* in the requested format.
	*
	* @param key the key
	*
	* @param keySpec the requested format in which the key material shall be
	* returned
	*
	* @return the underlying key specification (key material) in the
	* requested format
	*
	* @exception InvalidKeySpecException if the requested key specification is
	* inappropriate for the given key, or the given key cannot be processed
	* (e.g., the given key has an unrecognized algorithm or format).
	*/
	protected KeySpec engineGetKeySpec(SecretKey key, Class<?> keySpecCl)
	throws InvalidKeySpecException {
	if ((key instanceof SecretKey)
	&& (validTypes.contains(key.getAlgorithm().toUpperCase(Locale.ENGLISH)))
	&& (key.getFormat().equalsIgnoreCase("RAW"))) {

	// Check if requested key spec is amongst the valid ones
	if ((keySpecCl != null)
	&& PBEKeySpec.class.isAssignableFrom(keySpecCl)) {
	byte[] passwdBytes = key.getEncoded();
	char[] passwdChars = new char[passwdBytes.length];
	for (int i=0; i<passwdChars.length; i++)
	passwdChars[i] = (char) (passwdBytes[i] & 0x7f);
	PBEKeySpec ret = new PBEKeySpec(passwdChars);
	// password char[] was cloned in PBEKeySpec constructor,
	// so we can zero it out here
	java.util.Arrays.fill(passwdChars, ' ');
	java.util.Arrays.fill(passwdBytes, (byte)0x00);
	return ret;
	} else {
	throw new InvalidKeySpecException("Invalid key spec");
	}
	} else {
	throw new InvalidKeySpecException("Invalid key "
	+ "format/algorithm");
	}
	}

	/**
	* Translates a <code>SecretKey</code> object, whose provider may be
	* unknown or potentially untrusted, into a corresponding
	* <code>SecretKey</code> object of this key factory.
	*
	* @param key the key whose provider is unknown or untrusted
	*
	* @return the translated key
	*
	* @exception InvalidKeyException if the given key cannot be processed by
	* this key factory.
	*/
	protected SecretKey engineTranslateKey(SecretKey key)
	throws InvalidKeyException
	{
	try {
	if ((key != null) &&
	(validTypes.contains(key.getAlgorithm().toUpperCase(Locale.ENGLISH))) &&
	(key.getFormat().equalsIgnoreCase("RAW"))) {

	// Check if key originates from this factory
	if (key instanceof com.sun.crypto.provider.PBEKey) {
	return key;
	}

	// Convert key to spec
	PBEKeySpec pbeKeySpec = (PBEKeySpec)engineGetKeySpec
	(key, PBEKeySpec.class);

	// Create key from spec, and return it
	return engineGenerateSecret(pbeKeySpec);
	} else {
	throw new InvalidKeyException("Invalid key format/algorithm");
	}

	} catch (InvalidKeySpecException ikse) {
	throw new InvalidKeyException("Cannot translate key: "
	+ ikse.getMessage());
	}
	}
	}

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