diff --git a/Crypto/src/asn1/ocsp/ResponseData.cs b/Crypto/src/asn1/ocsp/ResponseData.cs
new file mode 100644
index 000000000..173829db8
--- /dev/null
+++ b/Crypto/src/asn1/ocsp/ResponseData.cs
@@ -0,0 +1,158 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Ocsp
+{
+ public class ResponseData
+ : Asn1Encodable
+ {
+ private static readonly DerInteger V1 = new DerInteger(0);
+
+ private readonly bool versionPresent;
+ private readonly DerInteger version;
+ private readonly ResponderID responderID;
+ private readonly DerGeneralizedTime producedAt;
+ private readonly Asn1Sequence responses;
+ private readonly X509Extensions responseExtensions;
+
+ public static ResponseData GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ public static ResponseData GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is ResponseData)
+ {
+ return (ResponseData)obj;
+ }
+
+ if (obj is Asn1Sequence)
+ {
+ return new ResponseData((Asn1Sequence)obj);
+ }
+
+ throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+ }
+
+ public ResponseData(
+ DerInteger version,
+ ResponderID responderID,
+ DerGeneralizedTime producedAt,
+ Asn1Sequence responses,
+ X509Extensions responseExtensions)
+ {
+ this.version = version;
+ this.responderID = responderID;
+ this.producedAt = producedAt;
+ this.responses = responses;
+ this.responseExtensions = responseExtensions;
+ }
+
+ public ResponseData(
+ ResponderID responderID,
+ DerGeneralizedTime producedAt,
+ Asn1Sequence responses,
+ X509Extensions responseExtensions)
+ : this(V1, responderID, producedAt, responses, responseExtensions)
+ {
+ }
+
+ private ResponseData(
+ Asn1Sequence seq)
+ {
+ int index = 0;
+
+ Asn1Encodable enc = seq[0];
+ if (enc is Asn1TaggedObject)
+ {
+ Asn1TaggedObject o = (Asn1TaggedObject)enc;
+
+ if (o.TagNo == 0)
+ {
+ this.versionPresent = true;
+ this.version = DerInteger.GetInstance(o, true);
+ index++;
+ }
+ else
+ {
+ this.version = V1;
+ }
+ }
+ else
+ {
+ this.version = V1;
+ }
+
+ this.responderID = ResponderID.GetInstance(seq[index++]);
+ this.producedAt = (DerGeneralizedTime)seq[index++];
+ this.responses = (Asn1Sequence)seq[index++];
+
+ if (seq.Count > index)
+ {
+ this.responseExtensions = X509Extensions.GetInstance(
+ (Asn1TaggedObject)seq[index], true);
+ }
+ }
+
+ public DerInteger Version
+ {
+ get { return version; }
+ }
+
+ public ResponderID ResponderID
+ {
+ get { return responderID; }
+ }
+
+ public DerGeneralizedTime ProducedAt
+ {
+ get { return producedAt; }
+ }
+
+ public Asn1Sequence Responses
+ {
+ get { return responses; }
+ }
+
+ public X509Extensions ResponseExtensions
+ {
+ get { return responseExtensions; }
+ }
+
+ /**
+ * Produce an object suitable for an Asn1OutputStream.
+ * <pre>
+ * ResponseData ::= Sequence {
+ * version [0] EXPLICIT Version DEFAULT v1,
+ * responderID ResponderID,
+ * producedAt GeneralizedTime,
+ * responses Sequence OF SingleResponse,
+ * responseExtensions [1] EXPLICIT Extensions OPTIONAL }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+
+ if (versionPresent || !version.Equals(V1))
+ {
+ v.Add(new DerTaggedObject(true, 0, version));
+ }
+
+ v.Add(responderID, producedAt, responses);
+
+ if (responseExtensions != null)
+ {
+ v.Add(new DerTaggedObject(true, 1, responseExtensions));
+ }
+
+ return new DerSequence(v);
+ }
+ }
+}
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