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using System;
using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.X509
{
/// <remarks>Class to produce an X.509 Version 2 AttributeCertificate.</remarks>
public class X509V2AttributeCertificateGenerator
{
private readonly X509ExtensionsGenerator extGenerator = new X509ExtensionsGenerator();
private V2AttributeCertificateInfoGenerator acInfoGen;
private DerObjectIdentifier sigOID;
private AlgorithmIdentifier sigAlgId;
private string signatureAlgorithm;
public X509V2AttributeCertificateGenerator()
{
acInfoGen = new V2AttributeCertificateInfoGenerator();
}
/// <summary>Reset the generator</summary>
public void Reset()
{
acInfoGen = new V2AttributeCertificateInfoGenerator();
extGenerator.Reset();
}
/// <summary>Set the Holder of this Attribute Certificate.</summary>
public void SetHolder(
AttributeCertificateHolder holder)
{
acInfoGen.SetHolder(holder.holder);
}
/// <summary>Set the issuer.</summary>
public void SetIssuer(
AttributeCertificateIssuer issuer)
{
acInfoGen.SetIssuer(AttCertIssuer.GetInstance(issuer.form));
}
/// <summary>Set the serial number for the certificate.</summary>
public void SetSerialNumber(
BigInteger serialNumber)
{
acInfoGen.SetSerialNumber(new DerInteger(serialNumber));
}
public void SetNotBefore(
DateTime date)
{
acInfoGen.SetStartDate(new DerGeneralizedTime(date));
}
public void SetNotAfter(
DateTime date)
{
acInfoGen.SetEndDate(new DerGeneralizedTime(date));
}
/// <summary>
/// Set the signature algorithm. This can be either a name or an OID, names
/// are treated as case insensitive.
/// </summary>
/// <param name="signatureAlgorithm">The algorithm name.</param>
public void SetSignatureAlgorithm(
string signatureAlgorithm)
{
this.signatureAlgorithm = signatureAlgorithm;
try
{
sigOID = X509Utilities.GetAlgorithmOid(signatureAlgorithm);
}
catch (Exception)
{
throw new ArgumentException("Unknown signature type requested");
}
sigAlgId = X509Utilities.GetSigAlgID(sigOID, signatureAlgorithm);
acInfoGen.SetSignature(sigAlgId);
}
/// <summary>Add an attribute.</summary>
public void AddAttribute(
X509Attribute attribute)
{
acInfoGen.AddAttribute(AttributeX509.GetInstance(attribute.ToAsn1Object()));
}
public void SetIssuerUniqueId(
bool[] iui)
{
// TODO convert bool array to bit string
//acInfoGen.SetIssuerUniqueID(iui);
throw Platform.CreateNotImplementedException("SetIssuerUniqueId()");
}
/// <summary>Add a given extension field for the standard extensions tag.</summary>
public void AddExtension(
string oid,
bool critical,
Asn1Encodable extensionValue)
{
extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, extensionValue);
}
/// <summary>
/// Add a given extension field for the standard extensions tag.
/// The value parameter becomes the contents of the octet string associated
/// with the extension.
/// </summary>
public void AddExtension(
string oid,
bool critical,
byte[] extensionValue)
{
extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, extensionValue);
}
/// <summary>
/// Generate an X509 certificate, based on the current issuer and subject.
/// </summary>
public IX509AttributeCertificate Generate(
AsymmetricKeyParameter publicKey)
{
return Generate(publicKey, null);
}
/// <summary>
/// Generate an X509 certificate, based on the current issuer and subject,
/// using the supplied source of randomness, if required.
/// </summary>
public IX509AttributeCertificate Generate(
AsymmetricKeyParameter publicKey,
SecureRandom random)
{
if (!extGenerator.IsEmpty)
{
acInfoGen.SetExtensions(extGenerator.Generate());
}
AttributeCertificateInfo acInfo = acInfoGen.GenerateAttributeCertificateInfo();
Asn1EncodableVector v = new Asn1EncodableVector();
v.Add(acInfo, sigAlgId);
try
{
v.Add(new DerBitString(X509Utilities.GetSignatureForObject(sigOID, signatureAlgorithm, publicKey, random, acInfo)));
return new X509V2AttributeCertificate(AttributeCertificate.GetInstance(new DerSequence(v)));
}
catch (Exception e)
{
// TODO
// throw new ExtCertificateEncodingException("constructed invalid certificate", e);
throw new CertificateEncodingException("constructed invalid certificate", e);
}
}
/// <summary>
/// Allows enumeration of the signature names supported by the generator.
/// </summary>
public IEnumerable SignatureAlgNames
{
get { return X509Utilities.GetAlgNames(); }
}
}
}
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