package org.bouncycastle.x509;
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.PrivateKey;
import java.security.SecureRandom;
import java.security.Signature;
import java.security.SignatureException;
import java.security.cert.CRLException;
import java.security.cert.X509CRL;
import java.security.cert.X509CRLEntry;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import java.util.SimpleTimeZone;
import java.util.Vector;
import javax.security.auth.x500.X500Principal;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERGeneralizedTime;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DEROutputStream;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.CertificateList;
import org.bouncycastle.asn1.x509.TBSCertList;
import org.bouncycastle.asn1.x509.Time;
import org.bouncycastle.asn1.x509.V2TBSCertListGenerator;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.asn1.x509.X509Name;
import org.bouncycastle.jce.X509Principal;
import org.bouncycastle.jce.provider.X509CRLObject;
/**
* class to produce an X.509 Version 2 CRL.
*/
public class X509V2CRLGenerator
{
private SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmss");
private SimpleTimeZone tz = new SimpleTimeZone(0, "Z");
private V2TBSCertListGenerator tbsGen;
private DERObjectIdentifier sigOID;
private AlgorithmIdentifier sigAlgId;
private String signatureAlgorithm;
private Hashtable extensions = null;
private Vector extOrdering = null;
public X509V2CRLGenerator()
{
dateF.setTimeZone(tz);
tbsGen = new V2TBSCertListGenerator();
}
/**
* reset the generator
*/
public void reset()
{
tbsGen = new V2TBSCertListGenerator();
}
/**
* Set the issuer distinguished name - the issuer is the entity whose private key is used to sign the
* certificate.
*/
public void setIssuerDN(
X500Principal issuer)
{
try
{
tbsGen.setIssuer(new X509Principal(issuer.getEncoded()));
}
catch (IOException e)
{
throw new IllegalArgumentException("can't process principal: " + e);
}
}
/**
* Set the issuer distinguished name - the issuer is the entity whose private key is used to sign the
* certificate.
*/
public void setIssuerDN(
X509Name issuer)
{
tbsGen.setIssuer(issuer);
}
public void setThisUpdate(
Date date)
{
tbsGen.setThisUpdate(new Time(date));
}
public void setNextUpdate(
Date date)
{
tbsGen.setNextUpdate(new Time(date));
}
/**
* Reason being as indicated by ReasonFlags, i.e. ReasonFlags.keyCompromise
* or 0 if ReasonFlags are not to be used
**/
public void addCRLEntry(BigInteger userCertificate, Date revocationDate, int reason)
{
tbsGen.addCRLEntry(new DERInteger(userCertificate), new Time(revocationDate), reason);
}
/**
* Add a CRL entry with an Invalidity Date extension as well as a CRLReason extension.
* Reason being as indicated by ReasonFlags, i.e. ReasonFlags.keyCompromise
* or 0 if ReasonFlags are not to be used
**/
public void addCRLEntry(BigInteger userCertificate, Date revocationDate, int reason, Date invalidityDate)
{
tbsGen.addCRLEntry(new DERInteger(userCertificate), new Time(revocationDate), reason, new DERGeneralizedTime(invalidityDate));
}
/**
* Add a CRL entry with extensions.
**/
public void addCRLEntry(BigInteger userCertificate, Date revocationDate, X509Extensions extensions)
{
tbsGen.addCRLEntry(new DERInteger(userCertificate), new Time(revocationDate), extensions);
}
/**
* Add the CRLEntry objects contained in a previous CRL.
*
* @param other the X509CRL to source the other entries from.
*/
public void addCRL(X509CRL other)
throws CRLException
{
Set revocations = other.getRevokedCertificates();
Iterator it = revocations.iterator();
while (it.hasNext())
{
X509CRLEntry entry = (X509CRLEntry)it.next();
ASN1InputStream aIn = new ASN1InputStream(entry.getEncoded());
try
{
tbsGen.addCRLEntry(ASN1Sequence.getInstance(aIn.readObject()));
}
catch (IOException e)
{
throw new CRLException("exception processing encoding of CRL: " + e.toString());
}
}
}
/**
* Set the signature algorithm. This can be either a name or an OID, names
* are treated as case insensitive.
*
* @param signatureAlgorithm string representation of the algorithm name.
*/
public void setSignatureAlgorithm(
String signatureAlgorithm)
{
this.signatureAlgorithm = signatureAlgorithm;
try
{
sigOID = X509Util.getAlgorithmOID(signatureAlgorithm);
}
catch (Exception e)
{
throw new IllegalArgumentException("Unknown signature type requested");
}
sigAlgId = X509Util.getSigAlgID(sigOID);
tbsGen.setSignature(sigAlgId);
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void addExtension(
String OID,
boolean critical,
DEREncodable value)
{
this.addExtension(new DERObjectIdentifier(OID), critical, value);
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void addExtension(
DERObjectIdentifier OID,
boolean critical,
DEREncodable value)
{
if (extensions == null)
{
extensions = new Hashtable();
extOrdering = new Vector();
}
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
try
{
dOut.writeObject(value);
}
catch (IOException e)
{
throw new IllegalArgumentException("error encoding value: " + e);
}
this.addExtension(OID, critical, bOut.toByteArray());
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void addExtension(
String OID,
boolean critical,
byte[] value)
{
this.addExtension(new DERObjectIdentifier(OID), critical, value);
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void addExtension(
DERObjectIdentifier OID,
boolean critical,
byte[] value)
{
if (extensions == null)
{
extensions = new Hashtable();
extOrdering = new Vector();
}
extensions.put(OID, new X509Extension(critical, new DEROctetString(value)));
extOrdering.addElement(OID);
}
/**
* generate an X509 CRL, based on the current issuer and subject
* using the default provider "BC".
*/
public X509CRL generateX509CRL(
PrivateKey key)
throws SecurityException, SignatureException, InvalidKeyException
{
try
{
return generateX509CRL(key, "BC", null);
}
catch (NoSuchProviderException e)
{
throw new SecurityException("BC provider not installed!");
}
}
/**
* generate an X509 CRL, based on the current issuer and subject
* using the default provider "BC" and an user defined SecureRandom object as
* source of randomness.
*/
public X509CRL generateX509CRL(
PrivateKey key,
SecureRandom random)
throws SecurityException, SignatureException, InvalidKeyException
{
try
{
return generateX509CRL(key, "BC", random);
}
catch (NoSuchProviderException e)
{
throw new SecurityException("BC provider not installed!");
}
}
/**
* generate an X509 certificate, based on the current issuer and subject
* using the passed in provider for the signing.
*/
public X509CRL generateX509CRL(
PrivateKey key,
String provider)
throws NoSuchProviderException, SecurityException, SignatureException, InvalidKeyException
{
return generateX509CRL(key, provider, null);
}
/**
* generate an X509 CRL, based on the current issuer and subject,
* using the passed in provider for the signing.
*/
public X509CRL generateX509CRL(
PrivateKey key,
String provider,
SecureRandom random)
throws NoSuchProviderException, SecurityException, SignatureException, InvalidKeyException
{
Signature sig = null;
try
{
sig = Signature.getInstance(sigOID.getId(), provider);
}
catch (NoSuchAlgorithmException ex)
{
try
{
sig = Signature.getInstance(signatureAlgorithm, provider);
}
catch (NoSuchAlgorithmException e)
{
throw new SecurityException("exception creating signature: " + e.toString());
}
}
if (random != null)
{
sig.initSign(key, random);
}
else
{
sig.initSign(key);
}
if (extensions != null)
{
tbsGen.setExtensions(new X509Extensions(extOrdering, extensions));
}
TBSCertList tbsCrl = tbsGen.generateTBSCertList();
try
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
dOut.writeObject(tbsCrl);
sig.update(bOut.toByteArray());
}
catch (Exception e)
{
throw new SecurityException("exception encoding TBS cert - " + e);
}
// Construct the CRL
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(tbsCrl);
v.add(sigAlgId);
v.add(new DERBitString(sig.sign()));
try
{
return new X509CRLObject(new CertificateList(new DERSequence(v)));
}
catch (CRLException e)
{
throw new SecurityException("exception creating CRL: " + e.getMessage());
}
}
/**
* Return an iterator of the signature names supported by the generator.
*
* @return an iterator containing recognised names.
*/
public Iterator getSignatureAlgNames()
{
return X509Util.getAlgNames();
}
}
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