Github #2131

Added missing Inner classes for KeyAgreementSpi in jdk1.11

Author: royb

prov/src/main/jdk1.11/org/bouncycastle/jcajce/provider/asymmetric/edec/KeyAgreementSpi.java

@@ -18,6 +18,7 @@
 import org.bouncycastle.crypto.agreement.XDHUnifiedAgreement;
 import org.bouncycastle.crypto.agreement.kdf.ConcatenationKDFGenerator;
 import org.bouncycastle.crypto.generators.KDF2BytesGenerator;
+import org.bouncycastle.crypto.generators.HKDFBytesGenerator;
 import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
 import org.bouncycastle.crypto.params.X25519PrivateKeyParameters;
 import org.bouncycastle.crypto.params.X25519PublicKeyParameters;
@@ -476,4 +477,23 @@ public X448UwithSHA512KDF()
             super("X448UwithSHA512KDF", new KDF2BytesGenerator(DigestFactory.createSHA512()));
         }
     }
+
+
+    public final static class X448withSHA512HKDF
+            extends KeyAgreementSpi
+    {
+        public X448withSHA512HKDF()
+        {
+            super("X448withSHA512HKDF", new HKDFBytesGenerator(DigestFactory.createSHA512()));
+        }
+    }
+
+    public final static class X25519withSHA256HKDF
+            extends KeyAgreementSpi
+    {
+        public X25519withSHA256HKDF()
+        {
+            super("X25519withSHA256HKDF", new HKDFBytesGenerator(DigestFactory.createSHA256()));
+        }
+    }
 }