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package org.bouncycastle.jce.provider;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.bouncycastle.jce.X509LDAPCertStoreParameters;
import org.bouncycastle.util.Selector;
import org.bouncycastle.util.StoreException;
import org.bouncycastle.x509.X509CertPairStoreSelector;
import org.bouncycastle.x509.X509CertStoreSelector;
import org.bouncycastle.x509.X509CertificatePair;
import org.bouncycastle.x509.X509StoreParameters;
import org.bouncycastle.x509.X509StoreSpi;
import org.bouncycastle.x509.util.LDAPStoreHelper;
/**
* A SPI implementation of Bouncy Castle <code>X509Store</code> for getting
* certificates form a LDAP directory.
*
* @see org.bouncycastle.x509.X509Store
*/
public class X509StoreLDAPCerts
extends X509StoreSpi
{
private LDAPStoreHelper helper;
public X509StoreLDAPCerts()
{
}
/**
* Initializes this LDAP cert store implementation.
*
* @param params <code>X509LDAPCertStoreParameters</code>.
* @throws IllegalArgumentException if <code>params</code> is not an instance of
* <code>X509LDAPCertStoreParameters</code>.
*/
public void engineInit(X509StoreParameters params)
{
if (!(params instanceof X509LDAPCertStoreParameters))
{
throw new IllegalArgumentException(
"Initialization parameters must be an instance of "
+ X509LDAPCertStoreParameters.class.getName() + ".");
}
helper = new LDAPStoreHelper((X509LDAPCertStoreParameters)params);
}
/**
* Returns a collection of matching certificates from the LDAP location.
* <p>
* The selector must be a of type <code>X509CertStoreSelector</code>. If
* it is not an empty collection is returned.
* </p><p>
* The implementation searches only for CA certificates, if the method
* {@link java.security.cert.X509CertSelector#getBasicConstraints()} is
* greater or equal to 0. If it is -2 only end certificates are searched.
* </p><p>
* The subject and the serial number for end certificates should be
* reasonable criterias for a selector.
* </p>
* @param selector The selector to use for finding.
* @return A collection with the matches.
* @throws StoreException if an exception occurs while searching.
*/
public Collection engineGetMatches(Selector selector) throws StoreException
{
if (!(selector instanceof X509CertStoreSelector))
{
return Collections.EMPTY_SET;
}
X509CertStoreSelector xselector = (X509CertStoreSelector)selector;
Set set = new HashSet();
// test if only CA certificates should be selected
if (xselector.getBasicConstraints() > 0)
{
set.addAll(helper.getCACertificates(xselector));
set.addAll(getCertificatesFromCrossCertificatePairs(xselector));
}
// only end certificates should be selected
else if (xselector.getBasicConstraints() == -2)
{
set.addAll(helper.getUserCertificates(xselector));
}
// nothing specified
else
{
set.addAll(helper.getUserCertificates(xselector));
set.addAll(helper.getCACertificates(xselector));
set.addAll(getCertificatesFromCrossCertificatePairs(xselector));
}
return set;
}
private Collection getCertificatesFromCrossCertificatePairs(
X509CertStoreSelector xselector) throws StoreException
{
Set set = new HashSet();
X509CertPairStoreSelector ps = new X509CertPairStoreSelector();
ps.setForwardSelector(xselector);
ps.setReverseSelector(new X509CertStoreSelector());
Set crossCerts = new HashSet(helper.getCrossCertificatePairs(ps));
Set forward = new HashSet();
Set reverse = new HashSet();
Iterator it = crossCerts.iterator();
while (it.hasNext())
{
X509CertificatePair pair = (X509CertificatePair)it.next();
if (pair.getForward() != null)
{
forward.add(pair.getForward());
}
if (pair.getReverse() != null)
{
reverse.add(pair.getReverse());
}
}
set.addAll(forward);
set.addAll(reverse);
return set;
}
}
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