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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms.
This jar contains JCE provider for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.7.
package org.spongycastle.jce.provider;
import java.io.IOException;
import java.security.AlgorithmParametersSpi;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import javax.crypto.spec.PBEParameterSpec;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Encoding;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DERInteger;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.pkcs.PBKDF2Params;
import org.spongycastle.asn1.pkcs.PKCS12PBEParams;
import org.spongycastle.jce.spec.IESParameterSpec;
public abstract class JDKAlgorithmParameters
extends AlgorithmParametersSpi
{
protected boolean isASN1FormatString(String format)
{
return format == null || format.equals("ASN.1");
}
protected AlgorithmParameterSpec engineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == null)
{
throw new NullPointerException("argument to getParameterSpec must not be null");
}
return localEngineGetParameterSpec(paramSpec);
}
protected abstract AlgorithmParameterSpec localEngineGetParameterSpec(Class paramSpec)
throws InvalidParameterSpecException;
public static class PBKDF2
extends JDKAlgorithmParameters
{
PBKDF2Params params;
protected byte[] engineGetEncoded()
{
try
{
return params.getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
throw new RuntimeException("Oooops! " + e.toString());
}
}
protected byte[] engineGetEncoded(
String format)
{
if (isASN1FormatString(format))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == PBEParameterSpec.class)
{
return new PBEParameterSpec(params.getSalt(),
params.getIterationCount().intValue());
}
throw new InvalidParameterSpecException("unknown parameter spec passed to PKCS12 PBE parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof PBEParameterSpec))
{
throw new InvalidParameterSpecException("PBEParameterSpec required to initialise a PKCS12 PBE parameters algorithm parameters object");
}
PBEParameterSpec pbeSpec = (PBEParameterSpec)paramSpec;
this.params = new PBKDF2Params(pbeSpec.getSalt(),
pbeSpec.getIterationCount());
}
protected void engineInit(
byte[] params)
throws IOException
{
this.params = PBKDF2Params.getInstance(ASN1Primitive.fromByteArray(params));
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (isASN1FormatString(format))
{
engineInit(params);
return;
}
throw new IOException("Unknown parameters format in PWRIKEK parameters object");
}
protected String engineToString()
{
return "PBKDF2 Parameters";
}
}
public static class PKCS12PBE
extends JDKAlgorithmParameters
{
PKCS12PBEParams params;
protected byte[] engineGetEncoded()
{
try
{
return params.getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
throw new RuntimeException("Oooops! " + e.toString());
}
}
protected byte[] engineGetEncoded(
String format)
{
if (isASN1FormatString(format))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == PBEParameterSpec.class)
{
return new PBEParameterSpec(params.getIV(),
params.getIterations().intValue());
}
throw new InvalidParameterSpecException("unknown parameter spec passed to PKCS12 PBE parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof PBEParameterSpec))
{
throw new InvalidParameterSpecException("PBEParameterSpec required to initialise a PKCS12 PBE parameters algorithm parameters object");
}
PBEParameterSpec pbeSpec = (PBEParameterSpec)paramSpec;
this.params = new PKCS12PBEParams(pbeSpec.getSalt(),
pbeSpec.getIterationCount());
}
protected void engineInit(
byte[] params)
throws IOException
{
this.params = PKCS12PBEParams.getInstance(ASN1Primitive.fromByteArray(params));
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (isASN1FormatString(format))
{
engineInit(params);
return;
}
throw new IOException("Unknown parameters format in PKCS12 PBE parameters object");
}
protected String engineToString()
{
return "PKCS12 PBE Parameters";
}
}
public static class IES
extends JDKAlgorithmParameters
{
IESParameterSpec currentSpec;
/**
* in the absence of a standard way of doing it this will do for
* now...
*/
protected byte[] engineGetEncoded()
{
try
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DEROctetString(currentSpec.getDerivationV()));
v.add(new DEROctetString(currentSpec.getEncodingV()));
v.add(new DERInteger(currentSpec.getMacKeySize()));
return new DERSequence(v).getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
throw new RuntimeException("Error encoding IESParameters");
}
}
protected byte[] engineGetEncoded(
String format)
{
if (isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == IESParameterSpec.class)
{
return currentSpec;
}
throw new InvalidParameterSpecException("unknown parameter spec passed to ElGamal parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof IESParameterSpec))
{
throw new InvalidParameterSpecException("IESParameterSpec required to initialise a IES algorithm parameters object");
}
this.currentSpec = (IESParameterSpec)paramSpec;
}
protected void engineInit(
byte[] params)
throws IOException
{
try
{
ASN1Sequence s = (ASN1Sequence)ASN1Primitive.fromByteArray(params);
this.currentSpec = new IESParameterSpec(
((ASN1OctetString)s.getObjectAt(0)).getOctets(),
((ASN1OctetString)s.getObjectAt(0)).getOctets(),
((DERInteger)s.getObjectAt(0)).getValue().intValue());
}
catch (ClassCastException e)
{
throw new IOException("Not a valid IES Parameter encoding.");
}
catch (ArrayIndexOutOfBoundsException e)
{
throw new IOException("Not a valid IES Parameter encoding.");
}
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
engineInit(params);
}
else
{
throw new IOException("Unknown parameter format " + format);
}
}
protected String engineToString()
{
return "IES Parameters";
}
}
}