/*
 * Copyright (c) 1998, 2012, 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.io.*;
import java.math.BigInteger;
import java.security.AlgorithmParametersSpi;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import javax.crypto.spec.PBEParameterSpec;
import sun.misc.HexDumpEncoder;
import sun.security.util.*;


This class implements the parameter set used with password-based encryption, which is defined in PKCS#5 as follows:
PBEParameter ::=  SEQUENCE {
    salt   OCTET STRING SIZE(8),
    iterationCount   INTEGER }
Author:Jan Luehe
/** * This class implements the parameter set used with password-based * encryption, which is defined in PKCS#5 as follows: * * <pre> * PBEParameter ::= SEQUENCE { * salt OCTET STRING SIZE(8), * iterationCount INTEGER } * </pre> * * @author Jan Luehe * */
public final class PBEParameters extends AlgorithmParametersSpi { // the salt private byte[] salt = null; // the iteration count private int iCount = 0; // the cipher parameter private AlgorithmParameterSpec cipherParam = null; protected void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException { if (!(paramSpec instanceof PBEParameterSpec)) { throw new InvalidParameterSpecException ("Inappropriate parameter specification"); } this.salt = ((PBEParameterSpec)paramSpec).getSalt().clone(); this.iCount = ((PBEParameterSpec)paramSpec).getIterationCount(); this.cipherParam = ((PBEParameterSpec)paramSpec).getParameterSpec(); } protected void engineInit(byte[] encoded) throws IOException { try { DerValue val = new DerValue(encoded); if (val.tag != DerValue.tag_Sequence) { throw new IOException("PBE parameter parsing error: " + "not a sequence"); } val.data.reset(); this.salt = val.data.getOctetString(); this.iCount = val.data.getInteger(); if (val.data.available() != 0) { throw new IOException ("PBE parameter parsing error: extra data"); } } catch (NumberFormatException e) { throw new IOException("iteration count too big"); } } protected void engineInit(byte[] encoded, String decodingMethod) throws IOException { engineInit(encoded); } protected <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> paramSpec) throws InvalidParameterSpecException { if (PBEParameterSpec.class.isAssignableFrom(paramSpec)) { return paramSpec.cast( new PBEParameterSpec(this.salt, this.iCount, this.cipherParam)); } else { throw new InvalidParameterSpecException ("Inappropriate parameter specification"); } } protected byte[] engineGetEncoded() throws IOException { DerOutputStream out = new DerOutputStream(); DerOutputStream bytes = new DerOutputStream(); bytes.putOctetString(this.salt); bytes.putInteger(this.iCount); out.write(DerValue.tag_Sequence, bytes); return out.toByteArray(); } protected byte[] engineGetEncoded(String encodingMethod) throws IOException { return engineGetEncoded(); } /* * Returns a formatted string describing the parameters. */ protected String engineToString() { String LINE_SEP = System.getProperty("line.separator"); String saltString = LINE_SEP + " salt:" + LINE_SEP + "["; HexDumpEncoder encoder = new HexDumpEncoder(); saltString += encoder.encodeBuffer(salt); saltString += "]"; return saltString + LINE_SEP + " iterationCount:" + LINE_SEP + Debug.toHexString(BigInteger.valueOf(iCount)) + LINE_SEP; } }