package org.bouncycastle.jce.provider.symmetric;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.misc.CAST5CBCParameters;
import org.bouncycastle.crypto.CipherKeyGenerator;
import org.bouncycastle.crypto.engines.CAST5Engine;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.jce.provider.JCEBlockCipher;
import org.bouncycastle.jce.provider.JCEKeyGenerator;
import org.bouncycastle.jce.provider.JDKAlgorithmParameterGenerator;
import org.bouncycastle.jce.provider.JDKAlgorithmParameters;
import javax.crypto.spec.IvParameterSpec;
import java.io.IOException;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
public final class CAST5
{
private CAST5()
{
}
public static class ECB
extends JCEBlockCipher
{
public ECB()
{
super(new CAST5Engine());
}
}
public static class CBC
extends JCEBlockCipher
{
public CBC()
{
super(new CBCBlockCipher(new CAST5Engine()), 64);
}
}
public static class KeyGen
extends JCEKeyGenerator
{
public KeyGen()
{
super("CAST5", 128, new CipherKeyGenerator());
}
}
public static class AlgParamGen
extends JDKAlgorithmParameterGenerator
{
protected void engineInit(
AlgorithmParameterSpec genParamSpec,
SecureRandom random)
throws InvalidAlgorithmParameterException
{
throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for CAST5 parameter generation.");
}
protected AlgorithmParameters engineGenerateParameters()
{
byte[] iv = new byte[8];
if (random == null)
{
random = new SecureRandom();
}
random.nextBytes(iv);
AlgorithmParameters params;
try
{
params = AlgorithmParameters.getInstance("CAST5", "BC");
params.init(new IvParameterSpec(iv));
}
catch (Exception e)
{
throw new RuntimeException(e.getMessage());
}
return params;
}
}
public static class AlgParams
extends JDKAlgorithmParameters
{
private byte[] iv;
private int keyLength = 128;
protected byte[] engineGetEncoded()
{
byte[] tmp = new byte[iv.length];
System.arraycopy(iv, 0, tmp, 0, iv.length);
return tmp;
}
protected byte[] engineGetEncoded(
String format)
throws IOException
{
if (isASN1FormatString(format))
{
return new CAST5CBCParameters(engineGetEncoded(), keyLength).getEncoded();
}
if (format.equals("RAW"))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == IvParameterSpec.class)
{
return new IvParameterSpec(iv);
}
throw new InvalidParameterSpecException("unknown parameter spec passed to CAST5 parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec instanceof IvParameterSpec)
{
this.iv = ((IvParameterSpec)paramSpec).getIV();
}
else
{
throw new InvalidParameterSpecException("IvParameterSpec required to initialise a CAST5 parameters algorithm parameters object");
}
}
protected void engineInit(
byte[] params)
throws IOException
{
this.iv = new byte[params.length];
System.arraycopy(params, 0, iv, 0, iv.length);
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (isASN1FormatString(format))
{
ASN1InputStream aIn = new ASN1InputStream(params);
CAST5CBCParameters p = CAST5CBCParameters.getInstance(aIn.readObject());
keyLength = p.getKeyLength();
iv = p.getIV();
return;
}
if (format.equals("RAW"))
{
engineInit(params);
return;
}
throw new IOException("Unknown parameters format in IV parameters object");
}
protected String engineToString()
{
return "CAST5 Parameters";
}
}
}