{
if (this.getVersion() == 2)
{
HashSet set = new HashSet();
X509Extensions extensions = c.getTBSCertList().getExtensions();
Enumeration e = extensions.oids();
while (e.hasMoreElements())
{
DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
X509Extension ext = extensions.getExtension(oid);