init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Crmf/OptionalValidity.cs

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+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Crmf;
+
+public class OptionalValidity : Asn1Encodable
+{
+	private readonly Time notBefore;
+
+	private readonly Time notAfter;
+
+	public virtual Time NotBefore => notBefore;
+
+	public virtual Time NotAfter => notAfter;
+
+	private OptionalValidity(Asn1Sequence seq)
+	{
+		foreach (Asn1TaggedObject item in seq)
+		{
+			if (item.TagNo == 0)
+			{
+				notBefore = Time.GetInstance(item, explicitly: true);
+			}
+			else
+			{
+				notAfter = Time.GetInstance(item, explicitly: true);
+			}
+		}
+	}
+
+	public static OptionalValidity GetInstance(object obj)
+	{
+		if (obj == null || obj is OptionalValidity)
+		{
+			return (OptionalValidity)obj;
+		}
+		return new OptionalValidity(Asn1Sequence.GetInstance(obj));
+	}
+
+	public OptionalValidity(Time notBefore, Time notAfter)
+	{
+		this.notBefore = notBefore;
+		this.notAfter = notAfter;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		if (notBefore != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: true, 0, notBefore));
+		}
+		if (notAfter != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: true, 1, notAfter));
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+}