1 files changed, 60 insertions, 0 deletions
diff --git a/crypto/src/pqc/asn1/KyberPublicKey.cs b/crypto/src/pqc/asn1/KyberPublicKey.cs
new file mode 100644
index 000000000..9f162e334
--- /dev/null
+++ b/crypto/src/pqc/asn1/KyberPublicKey.cs
@@ -0,0 +1,60 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Pqc.Asn1
+{
+    /**
+     *    Crystal Kyber Public Key Format.
+     *    See https://www.ietf.org/archive/id/draft-uni-qsckeys-kyber-00.html for details.
+     *    <pre>
+     *        KyberPublicKey ::= SEQUENCE {
+     *         t           OCTET STRING,
+     *         rho         OCTET STRING
+     *     }
+     *    </pre>
+     */
+    [Obsolete("Will be removed as this draft proposal was rejected")]
+    public sealed class KyberPublicKey
+        : Asn1Encodable
+    {
+        public static KyberPublicKey GetInstance(object obj)
+        {
+            if (obj == null)
+                return null;
+            if (obj is KyberPublicKey kyberPublicKey)
+                return kyberPublicKey;
+            return new KyberPublicKey(Asn1Sequence.GetInstance(obj));
+        }
+
+        public static KyberPublicKey GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
+        }
+
+        private readonly byte[] m_t;
+        private readonly byte[] m_rho;
+
+        public KyberPublicKey(byte[] t, byte[] rho)
+        {
+            m_t = t;
+            m_rho = rho;
+        }
+
+        private KyberPublicKey(Asn1Sequence seq)
+        {
+            m_t = Arrays.Clone(Asn1OctetString.GetInstance(seq[0]).GetOctets());
+            m_rho = Arrays.Clone(Asn1OctetString.GetInstance(seq[1]).GetOctets());
+        }
+
+        public byte[] T => Arrays.Clone(m_t);
+
+        public byte[] Rho => Arrays.Clone(m_rho);
+
+        public override Asn1Object ToAsn1Object()
+        {
+            return new DerSequence(new DerOctetString(m_t), new DerOctetString(m_rho));
+        }
+    }
+}