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package java.security;
import java.io.IOException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
public class AlgorithmParameters extends Object
{
private AlgorithmParametersSpi spi;
private Provider provider;
private String algorithm;
protected AlgorithmParameters(
AlgorithmParametersSpi paramSpi,
Provider provider,
String algorithm)
{
this.spi = paramSpi;
this.provider = provider;
this.algorithm = algorithm;
}
public final String getAlgorithm()
{
return algorithm;
}
public final byte[] getEncoded() throws IOException
{
return spi.engineGetEncoded();
}
public final byte[] getEncoded(String format) throws IOException
{
return spi.engineGetEncoded(format);
}
public static AlgorithmParameters getInstance(String algorithm)
throws NoSuchAlgorithmException
{
try
{
SecurityUtil.Implementation imp = SecurityUtil.getImplementation("AlgorithmParameters", algorithm, null);
if (imp != null)
{
return new AlgorithmParameters((AlgorithmParametersSpi)imp.getEngine(), imp.getProvider(), algorithm);
}
throw new NoSuchAlgorithmException("can't find algorithm " + algorithm);
}
catch (NoSuchProviderException e)
{
throw new NoSuchAlgorithmException(algorithm + " not found");
}
}
public static AlgorithmParameters getInstance(String algorithm, String provider)
throws NoSuchAlgorithmException, NoSuchProviderException
{
SecurityUtil.Implementation imp = SecurityUtil.getImplementation("AlgorithmParameters", algorithm, provider);
if (imp != null)
{
return new AlgorithmParameters((AlgorithmParametersSpi)imp.getEngine(), imp.getProvider(), algorithm);
}
throw new NoSuchAlgorithmException("can't find algorithm " + algorithm);
}
public final AlgorithmParameterSpec getParameterSpec(Class paramSpec)
throws InvalidParameterSpecException
{
return spi.engineGetParameterSpec(paramSpec);
}
public final Provider getProvider()
{
return provider;
}
public final void init(AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
spi.engineInit(paramSpec);
}
public final void init(byte[] params) throws IOException
{
spi.engineInit(params);
}
public final void init(byte[] params, String format) throws IOException
{
spi.engineInit(params, format);
}
public final String toString()
{
return spi.engineToString();
}
}
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