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package java.security;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
public class KeyFactory extends Object
{
private KeyFactorySpi keyFacSpi;
private Provider provider;
private String algorithm;
protected KeyFactory(
KeyFactorySpi keyFacSpi,
Provider provider,
String algorithm)
{
this.keyFacSpi = keyFacSpi;
this.provider = provider;
this.algorithm = algorithm;
}
public final PrivateKey generatePrivate(KeySpec keySpec)
throws InvalidKeySpecException
{
return keyFacSpi.engineGeneratePrivate(keySpec);
}
public final PublicKey generatePublic(KeySpec keySpec)
throws InvalidKeySpecException
{
return keyFacSpi.engineGeneratePublic(keySpec);
}
public final String getAlgorithm()
{
return algorithm;
}
public static KeyFactory getInstance(String algorithm)
throws NoSuchAlgorithmException
{
try
{
SecurityUtil.Implementation imp = SecurityUtil.getImplementation("KeyFactory", algorithm, null);
if (imp != null)
{
return new KeyFactory((KeyFactorySpi)imp.getEngine(), imp.getProvider(), algorithm);
}
throw new NoSuchAlgorithmException("can't find algorithm " + algorithm);
}
catch (NoSuchProviderException e)
{
throw new NoSuchAlgorithmException(algorithm + " not found");
}
}
public static KeyFactory getInstance(String algorithm, String provider)
throws NoSuchAlgorithmException, NoSuchProviderException
{
SecurityUtil.Implementation imp = SecurityUtil.getImplementation("KeyFactory", algorithm, null);
if (imp != null)
{
return new KeyFactory((KeyFactorySpi)imp.getEngine(), imp.getProvider(), algorithm);
}
throw new NoSuchAlgorithmException("can't find algorithm " + algorithm);
}
public final KeySpec getKeySpec(Key key, Class keySpec)
throws InvalidKeySpecException
{
return keyFacSpi.engineGetKeySpec(key, keySpec);
}
public final Provider getProvider()
{
return provider;
}
public final Key translateKey(Key key)
throws InvalidKeyException
{
return keyFacSpi.engineTranslateKey(key);
}
}
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