1 files changed, 86 insertions, 0 deletions
diff --git a/crypto/src/asn1/tsp/ArchiveTimeStampChain.cs b/crypto/src/asn1/tsp/ArchiveTimeStampChain.cs
new file mode 100644
index 000000000..13138d6f9
--- /dev/null
+++ b/crypto/src/asn1/tsp/ArchiveTimeStampChain.cs
@@ -0,0 +1,86 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Tsp
+{
+    /**
+     * Implementation of ArchiveTimeStampChain type, as defined in RFC4998 and RFC6283.
+     * <p>
+     * An ArchiveTimeStampChain corresponds to a SEQUENCE OF ArchiveTimeStamps, and has the following
+     * ASN.1 Syntax:
+     * <p>
+     * ArchiveTimeStampChain ::= SEQUENCE OF ArchiveTimeStamp
+     */
+    public class ArchiveTimeStampChain
+        : Asn1Encodable
+    {
+        /**
+         * Return an ArchiveTimeStampChain from the given object.
+         *
+         * @param obj the object we want converted.
+         * @return an ArchiveTimeStampChain instance, or null.
+         * @throws IllegalArgumentException if the object cannot be converted.
+         */
+        public static ArchiveTimeStampChain GetInstance(object obj)
+        {
+            if (obj == null)
+                return null;
+            if (obj is ArchiveTimeStampChain archiveTimeStampChain)
+                return archiveTimeStampChain;
+            return new ArchiveTimeStampChain(Asn1Sequence.GetInstance(obj));
+        }
+
+        public static ArchiveTimeStampChain GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
+        {
+            return new ArchiveTimeStampChain(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
+        }
+
+        private readonly Asn1Sequence m_archiveTimeStamps;
+
+        public ArchiveTimeStampChain(ArchiveTimeStamp archiveTimeStamp)
+        {
+            m_archiveTimeStamps = new DerSequence(archiveTimeStamp);
+        }
+
+        public ArchiveTimeStampChain(ArchiveTimeStamp[] archiveTimeStamps)
+        {
+            m_archiveTimeStamps = new DerSequence(archiveTimeStamps);
+        }
+
+        private ArchiveTimeStampChain(Asn1Sequence sequence)
+        {
+            Asn1EncodableVector vector = new Asn1EncodableVector(sequence.Count);
+
+            foreach (var element in sequence)
+            {
+                vector.Add(ArchiveTimeStamp.GetInstance(element));
+            }
+
+            m_archiveTimeStamps = new DerSequence(vector);
+        }
+
+        public virtual ArchiveTimeStamp[] GetArchiveTimestamps() =>
+            m_archiveTimeStamps.MapElements(ArchiveTimeStamp.GetInstance);
+
+        /**
+         * Adds an {@link ArchiveTimeStamp} object to the archive timestamp chain.
+         *
+         * @param archiveTimeStamp the {@link ArchiveTimeStamp} to add.
+         * @return returns the modified chain.
+         */
+        public virtual ArchiveTimeStampChain Append(ArchiveTimeStamp archiveTimeStamp)
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector(m_archiveTimeStamps.Count + 1);
+
+            foreach (var element in m_archiveTimeStamps)
+            {
+                v.Add(element);
+            }
+
+            v.Add(archiveTimeStamp);
+
+            return new ArchiveTimeStampChain(new DerSequence(v));
+        }
+
+        public override Asn1Object ToAsn1Object() => m_archiveTimeStamps;
+    }
+}