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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.
package org.bouncycastle.jce.provider;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREnumerated;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROutputStream;
import org.bouncycastle.asn1.util.ASN1Dump;
import org.bouncycastle.asn1.x509.CRLReason;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.asn1.x509.TBSCertList;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.x509.extension.X509ExtensionUtil;
import javax.security.auth.x500.X500Principal;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.cert.CRLException;
import java.security.cert.X509CRLEntry;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
/**
* The following extensions are listed in RFC 2459 as relevant to CRL Entries
*
* ReasonCode Hode Instruction Code Invalidity Date Certificate Issuer
* (critical)
*/
public class X509CRLEntryObject extends X509CRLEntry
{
private TBSCertList.CRLEntry c;
private boolean isIndirect;
private X500Principal previousCertificateIssuer;
private X500Principal certificateIssuer;
public X509CRLEntryObject(TBSCertList.CRLEntry c)
{
this.c = c;
this.certificateIssuer = loadCertificateIssuer();
}
/**
* Constructor for CRLEntries of indirect CRLs. If isIndirect
* is false {@link #getCertificateIssuer()} will always
* return null, previousCertificateIssuer is
* ignored. If this isIndirect is specified and this CRLEntry
* has no certificate issuer CRL entry extension
* previousCertificateIssuer is returned by
* {@link #getCertificateIssuer()}.
*
* @param c
* TBSCertList.CRLEntry object.
* @param isIndirect
* true if the corresponding CRL is a indirect
* CRL.
* @param previousCertificateIssuer
* Certificate issuer of the previous CRLEntry.
*/
public X509CRLEntryObject(
TBSCertList.CRLEntry c,
boolean isIndirect,
X500Principal previousCertificateIssuer)
{
this.c = c;
this.isIndirect = isIndirect;
this.previousCertificateIssuer = previousCertificateIssuer;
this.certificateIssuer = loadCertificateIssuer();
}
/**
* Will return true if any extensions are present and marked as critical as
* we currently dont handle any extensions!
*/
public boolean hasUnsupportedCriticalExtension()
{
Set extns = getCriticalExtensionOIDs();
return extns != null && !extns.isEmpty();
}
private X500Principal loadCertificateIssuer()
{
if (!isIndirect)
{
return null;
}
byte[] ext = getExtensionValue(X509Extensions.CertificateIssuer.getId());
if (ext == null)
{
return previousCertificateIssuer;
}
try
{
GeneralName[] names = GeneralNames.getInstance(
X509ExtensionUtil.fromExtensionValue(ext)).getNames();
for (int i = 0; i < names.length; i++)
{
if (names[i].getTagNo() == GeneralName.directoryName)
{
return new X500Principal(names[i].getName().getDERObject().getDEREncoded());
}
}
return null;
}
catch (IOException e)
{
return null;
}
}
public X500Principal getCertificateIssuer()
{
return certificateIssuer;
}
private Set getExtensionOIDs(boolean critical)
{
X509Extensions extensions = c.getExtensions();
if (extensions != null)
{
Set set = new HashSet();
Enumeration e = extensions.oids();
while (e.hasMoreElements())
{
DERObjectIdentifier oid = (DERObjectIdentifier) e.nextElement();
X509Extension ext = extensions.getExtension(oid);
if (critical == ext.isCritical())
{
set.add(oid.getId());
}
}
return set;
}
return null;
}
public Set getCriticalExtensionOIDs()
{
return getExtensionOIDs(true);
}
public Set getNonCriticalExtensionOIDs()
{
return getExtensionOIDs(false);
}
public byte[] getExtensionValue(String oid)
{
X509Extensions exts = c.getExtensions();
if (exts != null)
{
X509Extension ext = exts.getExtension(new DERObjectIdentifier(oid));
if (ext != null)
{
try
{
return ext.getValue().getEncoded();
}
catch (Exception e)
{
throw new RuntimeException("error encoding " + e.toString());
}
}
}
return null;
}
public byte[] getEncoded()
throws CRLException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
try
{
dOut.writeObject(c);
return bOut.toByteArray();
}
catch (IOException e)
{
throw new CRLException(e.toString());
}
}
public BigInteger getSerialNumber()
{
return c.getUserCertificate().getValue();
}
public Date getRevocationDate()
{
return c.getRevocationDate().getDate();
}
public boolean hasExtensions()
{
return c.getExtensions() != null;
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = System.getProperty("line.separator");
buf.append(" userCertificate: ").append(this.getSerialNumber()).append(nl);
buf.append(" revocationDate: ").append(this.getRevocationDate()).append(nl);
buf.append(" certificateIssuer: ").append(this.getCertificateIssuer()).append(nl);
X509Extensions extensions = c.getExtensions();
if (extensions != null)
{
Enumeration e = extensions.oids();
if (e.hasMoreElements())
{
buf.append(" crlEntryExtensions:").append(nl);
while (e.hasMoreElements())
{
DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
X509Extension ext = extensions.getExtension(oid);
if (ext.getValue() != null)
{
byte[] octs = ext.getValue().getOctets();
ASN1InputStream dIn = new ASN1InputStream(octs);
buf.append(" critical(").append(ext.isCritical()).append(") ");
try
{
if (oid.equals(X509Extensions.ReasonCode))
{
buf.append(new CRLReason(DEREnumerated.getInstance(dIn.readObject()))).append(nl);
}
else if (oid.equals(X509Extensions.CertificateIssuer))
{
buf.append("Certificate issuer: ").append(new GeneralNames((ASN1Sequence)dIn.readObject())).append(nl);
}
else
{
buf.append(oid.getId());
buf.append(" value = ").append(ASN1Dump.dumpAsString(dIn.readObject())).append(nl);
}
}
catch (Exception ex)
{
buf.append(oid.getId());
buf.append(" value = ").append("*****").append(nl);
}
}
else
{
buf.append(nl);
}
}
}
}
return buf.toString();
}
}