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[dev-crypto-csharp] CRL distribution points and CRL reason codes

• To: <dev-crypto-csharp@bouncycastle.org>
  
  
• Subject: [dev-crypto-csharp] CRL distribution points and CRL reason
  codes
  
• From: "Danny Heijl" <Danny.Heijl@cevi.be>
  
• Date: Mon, 23 Mar 2009 16:07:48 +0100
  
• List-id: <dev-crypto-csharp@bouncycastle.org>
  
• Thread-index: AcmrySCVddM3IQBhQt6rf2oG+511uA==
  
• Thread-topic: CRL distribution points and CRL reason codes
  

I recently needed to access the CRL distribution point from an X509
certificate and the reason code from a CRL.

I used the following extension methods:

/*+++++++++ start code ++++++++++++*/

using Org.BouncyCastle.X509;
using Org.BouncyCastle.X509.Extension;

namespace Org.BouncyCastle.Asn1.X509 {

    public enum CrlReasonCode {
        Unspecified=0,
        KeyCompromise=1,
        CACompromise=2,
        AffiliationChanged=3,
        Superseded=4,
        CessationOfOperation=5,
        CertificateHold=6,
        Unknown=7,
        RemoveFromCRL=8,
        PrivilegeWithdrawn=9,
        AACompromise=10
    }

    public static class MyCrlExtensions {

        /// <summary>
        /// Gets the reason code enumeration value from the
X509CrlEntry.
        /// </summary>
        /// <param name="ce">The X509 CRL entry instance.</param>
        /// <returns>A reason code enum value</returns>
        public static CrlReasonCode GetReasonCode(this X509CrlEntry ce)
{

            CrlReasonCode Result = CrlReasonCode.Unspecified;

            if (ce.HasExtensions) {
                Asn1OctetString os =
ce.GetExtensionValue(X509Extensions.ReasonCode);
                if (os != null) {
                    Asn1Object ob =
X509ExtensionUtilities.FromExtensionValue(os);