Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/GostCryptography/Asn1/Gost/Gost_R3410/Gost_R3410_PublicKey.cs

@@ -0,0 +1,42 @@
+using GostCryptography.Asn1.Ber;
+using GostCryptography.Properties;
+
+namespace GostCryptography.Asn1.Gost.Gost_R3410
+{
+    public abstract class Gost_R3410_PublicKey : Asn1OctetString
+    {
+        private readonly int _keySize;
+
+        protected Gost_R3410_PublicKey(int keySize)
+        {
+            _keySize = keySize;
+        }
+
+        public override void Decode(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
+        {
+            base.Decode(buffer, explicitTagging, implicitLength);
+
+            if (Length != _keySize)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, nameof(Length), Length);
+            }
+        }
+
+        public override int Encode(Asn1BerEncodeBuffer buffer, bool explicitTagging)
+        {
+            if (Length != _keySize)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, nameof(Length), Length);
+            }
+
+            var len = base.Encode(buffer, false);
+
+            if (explicitTagging)
+            {
+                len += buffer.EncodeTagAndLength(Tag, len);
+            }
+
+            return len;
+        }
+    }
+}