package org.bouncycastle.jce.provider;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Principal;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.cert.CRLException;
import java.security.cert.Certificate;
import java.security.cert.X509CRL;
import java.security.cert.X509CRLEntry;
import java.security.cert.X509Certificate;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import javax.security.auth.x500.X500Principal;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1OutputStream;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROutputStream;
import org.bouncycastle.asn1.x509.CertificateList;
import org.bouncycastle.asn1.x509.IssuingDistributionPoint;
import org.bouncycastle.asn1.x509.TBSCertList;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.jce.X509Principal;
import org.bouncycastle.x509.extension.X509ExtensionUtil;
/**
* The following extensions are listed in RFC 2459 as relevant to CRLs
*
* Authority Key Identifier
* Issuer Alternative Name
* CRL Number
* Delta CRL Indicator (critical)
* Issuing Distribution Point (critical)
*/
public class X509CRLObject
extends X509CRL
{
private CertificateList c;
private String sigAlgName;
private byte[] sigAlgParams;
public X509CRLObject(
CertificateList c)
throws CRLException
{
this.c = c;
try
{
this.sigAlgName = X509SignatureUtil.getSignatureName(c.getSignatureAlgorithm());
if (c.getSignatureAlgorithm().getParameters() != null)
{
this.sigAlgParams = ((ASN1Encodable)c.getSignatureAlgorithm().getParameters()).getDEREncoded();
}
else
{
this.sigAlgParams = null;
}
}
catch (Exception e)
{
throw new CRLException("CRL contents invalid: " + e);
}
}
/**
* 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();
if (extns != null && !extns.isEmpty())
{
return true;
}
return false;
}
private Set getExtensionOIDs(boolean critical)
{
if (this.getVersion() == 2)
{
Set 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);
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.getTBSCertList().getExtensions();
if (exts != null)
{
X509Extension ext = exts.getExtension(new DERObjectIdentifier(oid));
if (ext != null)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
try
{
dOut.writeObject(ext.getValue());
return bOut.toByteArray();
}
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 void verify(PublicKey key)
throws CRLException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException
{
verify(key, "BC");
}
public void verify(PublicKey key, String sigProvider)
throws CRLException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException
{
if (!c.getSignatureAlgorithm().equals(c.getTBSCertList().getSignature()))
{
throw new CRLException("Signature algorithm on CertifcateList does not match TBSCertList.");
}
Signature sig = Signature.getInstance(getSigAlgName(), sigProvider);
sig.initVerify(key);
sig.update(this.getTBSCertList());
if (!sig.verify(this.getSignature()))
{
throw new SignatureException("CRL does not verify with supplied public key.");
}
}
public int getVersion()
{
return c.getVersion();
}
public Principal getIssuerDN()
{
return new X509Principal(c.getIssuer());
}
public X500Principal getIssuerX500Principal()
{
try
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream aOut = new ASN1OutputStream(bOut);
aOut.writeObject(c.getIssuer());
return new X500Principal(bOut.toByteArray());
}
catch (IOException e)
{
throw new IllegalStateException("can't encode issuer DN");
}
}
public Date getThisUpdate()
{
return c.getThisUpdate().getDate();
}
public Date getNextUpdate()
{
if (c.getNextUpdate() != null)
{
return c.getNextUpdate().getDate();
}
return null;
}
public X509CRLEntry getRevokedCertificate(BigInteger serialNumber)
{
TBSCertList.CRLEntry[] certs = c.getRevokedCertificates();
boolean isIndirect = isIndirectCRL();
if (certs != null)
{
X500Principal previousCertificateIssuer = getIssuerX500Principal();
for (int i = 0; i < certs.length; i++)
{
X509CRLEntryObject crlentry = new X509CRLEntryObject(certs[i],
isIndirect, previousCertificateIssuer);
previousCertificateIssuer = crlentry.getCertificateIssuer();
if (crlentry.getSerialNumber().equals(serialNumber))
{
return crlentry;
}
}
}
return null;
}
private boolean isIndirectCRL()
{
byte[] idp = getExtensionValue(X509Extensions.IssuingDistributionPoint.getId());
boolean isIndirect = false;
try
{
if (idp != null)
{
isIndirect = IssuingDistributionPoint.getInstance(
X509ExtensionUtil.fromExtensionValue(idp))
.isIndirectCRL();
}
}
catch (IOException e)
{
throw new RuntimeException(
"Exception reading IssuingDistributionPoint" + e);
}
return isIndirect;
}
public Set getRevokedCertificates()
{
TBSCertList.CRLEntry[] certs = c.getRevokedCertificates();
boolean isIndirect = isIndirectCRL();
if (certs != null)
{
Set set = new HashSet();
X500Principal previousCertificateIssuer = getIssuerX500Principal();
for (int i = 0; i < certs.length; i++)
{
X509CRLEntryObject crlentry = new X509CRLEntryObject(certs[i],
isIndirect, previousCertificateIssuer);
set.add(crlentry);
previousCertificateIssuer = crlentry.getCertificateIssuer();
}
return set;
}
return null;
}
public byte[] getTBSCertList()
throws CRLException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
try
{
dOut.writeObject(c.getTBSCertList());
return bOut.toByteArray();
}
catch (IOException e)
{
throw new CRLException(e.toString());
}
}
public byte[] getSignature()
{
return c.getSignature().getBytes();
}
public String getSigAlgName()
{
return sigAlgName;
}
public String getSigAlgOID()
{
return c.getSignatureAlgorithm().getObjectId().getId();
}
public byte[] getSigAlgParams()
{
if (sigAlgParams != null)
{
byte[] tmp = new byte[sigAlgParams.length];
System.arraycopy(sigAlgParams, 0, tmp, 0, tmp.length);
return tmp;
}
return null;
}
/**
* Returns a string representation of this CRL.
*
* @return a string representation of this CRL.
*/
public String toString()
{
return "X.509 CRL";
}
/**
* Checks whether the given certificate is on this CRL.
*
* @param cert the certificate to check for.
* @return true if the given certificate is on this CRL,
* false otherwise.
*/
public boolean isRevoked(Certificate cert)
{
if (!cert.getType().equals("X.509"))
{
throw new RuntimeException("X.509 CRL used with non X.509 Cert");
}
TBSCertList.CRLEntry[] certs = c.getRevokedCertificates();
if (certs != null)
{
BigInteger serial = ((X509Certificate)cert).getSerialNumber();
for (int i = 0; i < certs.length; i++)
{
if (certs[i].getUserCertificate().getValue().equals(serial))
{
return true;
}
}
}
return false;
}
}