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package org.bouncycastle.cert.jcajce;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.security.NoSuchProviderException;
import java.security.Provider;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import org.bouncycastle.cert.X509CertificateHolder;
/**
* Converter for producing X509Certificate objects tied to a specific provider from X509CertificateHolder objects.
*/
public class JcaX509CertificateConverter
{
private CertHelper helper = new DefaultCertHelper();
/**
* Base constructor, configure with the default provider.
*/
public JcaX509CertificateConverter()
{
this.helper = new DefaultCertHelper();
}
/**
* Set the provider to use from a Provider object.
*
* @param provider the provider to use.
* @return the converter instance.
*/
public JcaX509CertificateConverter setProvider(Provider provider)
{
this.helper = new ProviderCertHelper(provider);
return this;
}
/**
* Set the provider to use by name.
*
* @param providerName name of the provider to use.
* @return the converter instance.
*/
public JcaX509CertificateConverter setProvider(String providerName)
{
this.helper = new NamedCertHelper(providerName);
return this;
}
/**
* Use the configured converter to produce a X509Certificate object from a X509CertificateHolder object.
*
* @param certHolder the holder to be converted
* @return a X509Certificate object
* @throws CertificateException if the conversion is unable to be made.
*/
public X509Certificate getCertificate(X509CertificateHolder certHolder)
throws CertificateException
{
try
{
CertificateFactory cFact = helper.getCertificateFactory("X.509");
return (X509Certificate)cFact.generateCertificate(new ByteArrayInputStream(certHolder.getEncoded()));
}
catch (IOException e)
{
throw new ExCertificateParsingException("exception parsing certificate: " + e.getMessage(), e);
}
catch (NoSuchProviderException e)
{
throw new ExCertificateException("cannot find required provider:" + e.getMessage(), e);
}
}
private class ExCertificateParsingException
extends CertificateParsingException
{
private Throwable cause;
public ExCertificateParsingException(String msg, Throwable cause)
{
super(msg);
this.cause = cause;
}
public Throwable getCause()
{
return cause;
}
}
private class ExCertificateException
extends CertificateException
{
private Throwable cause;
public ExCertificateException(String msg, Throwable cause)
{
super(msg);
this.cause = cause;
}
public Throwable getCause()
{
return cause;
}
}
}
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