PrivateKeyUsagePeriod.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » X509 » C# / CSharp Open Source

using System;

namespace Org.BouncyCastle.Asn1.X509{
  /// <remarks>
  /// <pre>
  /// PrivateKeyUsagePeriod ::= SEQUENCE
  /// {
  /// notBefore       [0]     GeneralizedTime OPTIONAL,
  /// notAfter        [1]     GeneralizedTime OPTIONAL }
  /// </pre>
  /// </remarks>
  public class PrivateKeyUsagePeriod
    : Asn1Encodable
  {
    public static PrivateKeyUsagePeriod GetInstance(
      object obj)
    {
      if (obj is PrivateKeyUsagePeriod)
      {
        return (PrivateKeyUsagePeriod) obj;
      }

      if (obj is Asn1Sequence)
      {
        return new PrivateKeyUsagePeriod((Asn1Sequence) obj);
      }

      if (obj is X509Extension)
      {
        return GetInstance(X509Extension.ConvertValueToObject((X509Extension) obj));
      }

      throw new ArgumentException("unknown object in GetInstance: " + obj.GetType().FullName, "obj");
    }

    private DerGeneralizedTime _notBefore, _notAfter;

    private PrivateKeyUsagePeriod(
      Asn1Sequence seq)
    {
      foreach (Asn1TaggedObject tObj in seq)
      {
        if (tObj.TagNo == 0)
        {
          _notBefore = DerGeneralizedTime.GetInstance(tObj, false);
        }
        else if (tObj.TagNo == 1)
        {
          _notAfter = DerGeneralizedTime.GetInstance(tObj, false);
        }
      }
    }

    public DerGeneralizedTime NotBefore
    {
      get { return _notBefore; }
    }

    public DerGeneralizedTime NotAfter
    {
      get { return _notAfter; }
    }

    public override Asn1Object ToAsn1Object()
    {
      Asn1EncodableVector v = new Asn1EncodableVector();

      if (_notBefore != null)
      {
        v.Add(new DerTaggedObject(false, 0, _notBefore));
      }

      if (_notAfter != null)
      {
        v.Add(new DerTaggedObject(false, 1, _notAfter));
      }

      return new DerSequence(v);
    }
  }
}