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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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.
*
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package com.sun.crypto.provider;
import java.util.*;
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:
*
* <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;
protected void engineInit(AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof PBEParameterSpec)) {
throw new InvalidParameterSpecException
("Inappropriate parameter specification");
}
this.salt = (byte[])((PBEParameterSpec)paramSpec).getSalt().clone();
this.iCount = ((PBEParameterSpec)paramSpec).getIterationCount();
}
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 AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
throws InvalidParameterSpecException
{
if (PBEParameterSpec.class.isAssignableFrom(paramSpec)) {
return new PBEParameterSpec(this.salt, this.iCount);
} 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;
}
}