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package org.spongycastle.jcajce.provider.asymmetric.rsa;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.DEROutputStream;
import org.spongycastle.asn1.pkcs.RSAESOAEPparams;
import org.spongycastle.asn1.pkcs.RSASSAPSSparams;
public abstract class AlgorithmParametersSpi
extends java.security.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 OAEP
extends AlgorithmParametersSpi
{
AlgorithmParameterSpec currentSpec;
/**
* Return the PKCS#1 ASN.1 structure RSAES-OAEP-params.
*/
protected byte[] engineGetEncoded()
{
return null;
}
protected byte[] engineGetEncoded(
String format)
{
if (this.isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
throw new InvalidParameterSpecException("unknown parameter spec passed to OAEP parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
this.currentSpec = paramSpec;
}
protected void engineInit(
byte[] params)
throws IOException
{
try
{
RSAESOAEPparams oaepP = RSAESOAEPparams.getInstance(params);
throw new IOException("Operation not supported");
}
catch (ClassCastException e)
{
throw new IOException("Not a valid OAEP Parameter encoding.");
}
catch (ArrayIndexOutOfBoundsException e)
{
throw new IOException("Not a valid OAEP Parameter encoding.");
}
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (format.equalsIgnoreCase("X.509")
|| format.equalsIgnoreCase("ASN.1"))
{
engineInit(params);
}
else
{
throw new IOException("Unknown parameter format " + format);
}
}
protected String engineToString()
{
return "OAEP Parameters";
}
}
public static class PSS
extends AlgorithmParametersSpi
{
/**
* Return the PKCS#1 ASN.1 structure RSASSA-PSS-params.
*/
protected byte[] engineGetEncoded()
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
RSASSAPSSparams pssP = new RSASSAPSSparams(RSASSAPSSparams.DEFAULT_HASH_ALGORITHM, RSASSAPSSparams.DEFAULT_MASK_GEN_FUNCTION, new ASN1Integer(20), RSASSAPSSparams.DEFAULT_TRAILER_FIELD);
dOut.writeObject(pssP);
dOut.close();
return bOut.toByteArray();
}
protected byte[] engineGetEncoded(
String format)
throws IOException
{
if (format.equalsIgnoreCase("X.509")
|| format.equalsIgnoreCase("ASN.1"))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
throw new InvalidParameterSpecException("unknown parameter spec passed to PSS parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
throw new InvalidParameterSpecException("Not implemented");
}
protected void engineInit(
byte[] params)
throws IOException
{
try
{
RSASSAPSSparams pssP = RSASSAPSSparams.getInstance(params);
}
catch (ClassCastException e)
{
throw new IOException("Not a valid PSS Parameter encoding.");
}
catch (ArrayIndexOutOfBoundsException e)
{
throw new IOException("Not a valid PSS Parameter encoding.");
}
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (this.isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
engineInit(params);
}
else
{
throw new IOException("Unknown parameter format " + format);
}
}
protected String engineToString()
{
return "PSS Parameters";
}
}
}
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