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using System;
using System.Collections.Generic;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security.Certificates;
namespace Org.BouncyCastle.X509
{
/**
* class to produce an X.509 Version 2 CRL.
*/
public class X509V2CrlGenerator
{
private readonly X509ExtensionsGenerator extGenerator = new X509ExtensionsGenerator();
private V2TbsCertListGenerator tbsGen;
public X509V2CrlGenerator()
{
tbsGen = new V2TbsCertListGenerator();
}
/// <summary>Create a builder for a version 2 CRL, initialised with another CRL.</summary>
/// <param name="template">Template CRL to base the new one on.</param>
public X509V2CrlGenerator(X509Crl template)
: this(template.CertificateList)
{
}
public X509V2CrlGenerator(CertificateList template)
{
tbsGen = new V2TbsCertListGenerator();
tbsGen.SetIssuer(template.Issuer);
tbsGen.SetThisUpdate(template.ThisUpdate);
tbsGen.SetNextUpdate(template.NextUpdate);
AddCrl(new X509Crl(template));
var extensions = template.TbsCertList.Extensions;
if (extensions != null)
{
foreach (var oid in extensions.ExtensionOids)
{
if (X509Extensions.AltSignatureAlgorithm.Equals(oid) ||
X509Extensions.AltSignatureValue.Equals(oid))
{
continue;
}
X509Extension ext = extensions.GetExtension(oid);
extGenerator.AddExtension(oid, ext.critical, ext.Value.GetOctets());
}
}
}
/**
* reset the generator
*/
public void Reset()
{
tbsGen = new V2TbsCertListGenerator();
extGenerator.Reset();
}
/**
* 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(
DateTime date)
{
tbsGen.SetThisUpdate(new Time(date));
}
public void SetNextUpdate(
DateTime date)
{
tbsGen.SetNextUpdate(new Time(date));
}
/**
* Reason being as indicated by CrlReason, i.e. CrlReason.KeyCompromise
* or 0 if CrlReason is not to be used
**/
public void AddCrlEntry(
BigInteger userCertificate,
DateTime 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 CrlReason, i.e. CrlReason.KeyCompromise
* or 0 if CrlReason is not to be used
**/
public void AddCrlEntry(
BigInteger userCertificate,
DateTime revocationDate,
int reason,
DateTime invalidityDate)
{
tbsGen.AddCrlEntry(new DerInteger(userCertificate), new Time(revocationDate), reason,
new Asn1GeneralizedTime(invalidityDate));
}
/**
* Add a CRL entry with extensions.
**/
public void AddCrlEntry(
BigInteger userCertificate,
DateTime 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)
{
if (other == null)
throw new ArgumentNullException("other");
var revocations = other.GetRevokedCertificates();
if (revocations != null)
{
foreach (X509CrlEntry entry in revocations)
{
try
{
tbsGen.AddCrlEntry(
Asn1Sequence.GetInstance(
Asn1Object.FromByteArray(entry.GetEncoded())));
}
catch (IOException e)
{
throw new CrlException("exception processing encoding of CRL", e);
}
}
}
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void AddExtension(
string oid,
bool critical,
Asn1Encodable extensionValue)
{
extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, extensionValue);
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void AddExtension(
DerObjectIdentifier oid,
bool critical,
Asn1Encodable extensionValue)
{
extGenerator.AddExtension(oid, critical, extensionValue);
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void AddExtension(
string oid,
bool critical,
byte[] extensionValue)
{
extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, new DerOctetString(extensionValue));
}
/**
* add a given extension field for the standard extensions tag (tag 0)
*/
public void AddExtension(
DerObjectIdentifier oid,
bool critical,
byte[] extensionValue)
{
extGenerator.AddExtension(oid, critical, new DerOctetString(extensionValue));
}
/// <summary>
/// Generate a new <see cref="X509Crl"/> using the provided <see cref="ISignatureFactory"/>.
/// </summary>
/// <param name="signatureFactory">A <see cref="ISignatureFactory">signature factory</see> with the necessary
/// algorithm details.</param>
/// <returns>An <see cref="X509Crl"/>.</returns>
public X509Crl Generate(ISignatureFactory signatureFactory)
{
var sigAlgID = (AlgorithmIdentifier)signatureFactory.AlgorithmDetails;
tbsGen.SetSignature(sigAlgID);
if (!extGenerator.IsEmpty)
{
tbsGen.SetExtensions(extGenerator.Generate());
}
TbsCertificateList tbsCertList = tbsGen.GenerateTbsCertList();
IStreamCalculator<IBlockResult> streamCalculator = signatureFactory.CreateCalculator();
using (var sigStream = streamCalculator.Stream)
{
tbsCertList.EncodeTo(sigStream, Asn1Encodable.Der);
}
var signature = streamCalculator.GetResult().Collect();
return new X509Crl(
CertificateList.GetInstance(new DerSequence(tbsCertList, sigAlgID, new DerBitString(signature))));
}
/// <summary>
/// Allows enumeration of the signature names supported by the generator.
/// </summary>
public IEnumerable<string> SignatureAlgNames
{
get { return X509Utilities.GetAlgNames(); }
}
}
}
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