| package org.bouncycastle.jcajce.provider.asymmetric.dh; |
| |
| 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 javax.crypto.interfaces.DHPrivateKey; |
| import javax.crypto.interfaces.DHPublicKey; |
| import javax.crypto.spec.DHPrivateKeySpec; |
| import javax.crypto.spec.DHPublicKeySpec; |
| |
| import org.bouncycastle.asn1.ASN1ObjectIdentifier; |
| import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers; |
| import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; |
| import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; |
| import org.bouncycastle.asn1.x9.X9ObjectIdentifiers; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi; |
| |
| public class KeyFactorySpi |
| extends BaseKeyFactorySpi |
| { |
| public KeyFactorySpi() |
| { |
| } |
| |
| protected KeySpec engineGetKeySpec( |
| Key key, |
| Class spec) |
| throws InvalidKeySpecException |
| { |
| if (spec.isAssignableFrom(DHPrivateKeySpec.class) && key instanceof DHPrivateKey) |
| { |
| DHPrivateKey k = (DHPrivateKey)key; |
| |
| return new DHPrivateKeySpec(k.getX(), k.getParams().getP(), k.getParams().getG()); |
| } |
| else if (spec.isAssignableFrom(DHPublicKeySpec.class) && key instanceof DHPublicKey) |
| { |
| DHPublicKey k = (DHPublicKey)key; |
| |
| return new DHPublicKeySpec(k.getY(), k.getParams().getP(), k.getParams().getG()); |
| } |
| |
| return super.engineGetKeySpec(key, spec); |
| } |
| |
| protected Key engineTranslateKey( |
| Key key) |
| throws InvalidKeyException |
| { |
| if (key instanceof DHPublicKey) |
| { |
| return new BCDHPublicKey((DHPublicKey)key); |
| } |
| else if (key instanceof DHPrivateKey) |
| { |
| return new BCDHPrivateKey((DHPrivateKey)key); |
| } |
| |
| throw new InvalidKeyException("key type unknown"); |
| } |
| |
| protected PrivateKey engineGeneratePrivate( |
| KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof DHPrivateKeySpec) |
| { |
| return new BCDHPrivateKey((DHPrivateKeySpec)keySpec); |
| } |
| |
| return super.engineGeneratePrivate(keySpec); |
| } |
| |
| protected PublicKey engineGeneratePublic( |
| KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof DHPublicKeySpec) |
| { |
| return new BCDHPublicKey((DHPublicKeySpec)keySpec); |
| } |
| |
| return super.engineGeneratePublic(keySpec); |
| } |
| |
| public PrivateKey generatePrivate(PrivateKeyInfo keyInfo) |
| throws IOException |
| { |
| ASN1ObjectIdentifier algOid = keyInfo.getPrivateKeyAlgorithm().getAlgorithm(); |
| |
| if (algOid.equals(PKCSObjectIdentifiers.dhKeyAgreement)) |
| { |
| return new BCDHPrivateKey(keyInfo); |
| } |
| else if (algOid.equals(X9ObjectIdentifiers.dhpublicnumber)) |
| { |
| return new BCDHPrivateKey(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(PKCSObjectIdentifiers.dhKeyAgreement)) |
| { |
| return new BCDHPublicKey(keyInfo); |
| } |
| else if (algOid.equals(X9ObjectIdentifiers.dhpublicnumber)) |
| { |
| return new BCDHPublicKey(keyInfo); |
| } |
| else |
| { |
| throw new IOException("algorithm identifier " + algOid + " in key not recognised"); |
| } |
| } |
| } |