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package org.bouncycastle.jcajce.provider.asymmetric.ecgost;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi;
import org.bouncycastle.jce.interfaces.ECPrivateKey;
import org.bouncycastle.jce.interfaces.ECPublicKey;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
public class KeyFactorySpi
extends BaseKeyFactorySpi
{
public KeyFactorySpi()
{
}
protected KeySpec engineGetKeySpec(
Key key,
Class spec)
throws InvalidKeySpecException
{
if (spec.isAssignableFrom(org.bouncycastle.jce.spec.ECPublicKeySpec.class) && key instanceof ECPublicKey)
{
ECPublicKey k = (ECPublicKey)key;
if (k.getParams() != null)
{
return new org.bouncycastle.jce.spec.ECPublicKeySpec(k.getQ(), k.getParameters());
}
else
{
ECParameterSpec implicitSpec = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa();
return new org.bouncycastle.jce.spec.ECPublicKeySpec(k.getQ(), implicitSpec);
}
}
else if (spec.isAssignableFrom(org.bouncycastle.jce.spec.ECPrivateKeySpec.class) && key instanceof ECPrivateKey)
{
ECPrivateKey k = (ECPrivateKey)key;
if (k.getParams() != null)
{
return new org.bouncycastle.jce.spec.ECPrivateKeySpec(k.getD(), k.getParameters());
}
else
{
ECParameterSpec implicitSpec = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa();
return new org.bouncycastle.jce.spec.ECPrivateKeySpec(k.getD(), implicitSpec);
}
}
return super.engineGetKeySpec(key, spec);
}
protected Key engineTranslateKey(
Key key)
throws InvalidKeyException
{
throw new InvalidKeyException("key type unknown");
}
protected PrivateKey engineGeneratePrivate(
KeySpec keySpec)
throws InvalidKeySpecException
{
if (keySpec instanceof ECPrivateKeySpec)
{
return new BCECGOST3410PrivateKey((ECPrivateKeySpec)keySpec);
}
return super.engineGeneratePrivate(keySpec);
}
protected PublicKey engineGeneratePublic(
KeySpec keySpec)
throws InvalidKeySpecException
{
if (keySpec instanceof ECPublicKeySpec)
{
return new BCECGOST3410PublicKey((ECPublicKeySpec)keySpec);
}
return super.engineGeneratePublic(keySpec);
}
public PrivateKey generatePrivate(PrivateKeyInfo keyInfo)
throws IOException
{
ASN1ObjectIdentifier algOid = keyInfo.getPrivateKeyAlgorithm().getAlgorithm();
if (algOid.equals(CryptoProObjectIdentifiers.gostR3410_2001))
{
return new BCECGOST3410PrivateKey(keyInfo);
}
else
{
throw new IOException("algorithm identifier " + algOid + " in key not recognised");
}
}
public PublicKey generatePublic(SubjectPublicKeyInfo keyInfo)
throws IOException
{
ASN1ObjectIdentifier algOid = keyInfo.getAlgorithm().getAlgorithm();
if (algOid.equals(CryptoProObjectIdentifiers.gostR3410_2001))
{
return new BCECGOST3410PublicKey(keyInfo);
}
else
{
throw new IOException("algorithm identifier " + algOid + " in key not recognised");
}
}
}
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