- Initial commit

Runtime/3rdParty/BouncyCastle/crypto/agreement/X25519Agreement.cs

@@ -0,0 +1,42 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Agreement
+{
+    public sealed class X25519Agreement
+        : IRawAgreement
+    {
+        private X25519PrivateKeyParameters m_privateKey;
+
+        public void Init(ICipherParameters parameters)
+        {
+            m_privateKey = (X25519PrivateKeyParameters)parameters;
+        }
+
+        public int AgreementSize
+        {
+            get { return X25519PrivateKeyParameters.SecretSize; }
+        }
+
+        public void CalculateAgreement(ICipherParameters publicKey, byte[] buf, int off)
+        {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+            CalculateAgreement(publicKey, buf.AsSpan(off));
+#else
+            m_privateKey.GenerateSecret((X25519PublicKeyParameters)publicKey, buf, off);
+#endif
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public void CalculateAgreement(ICipherParameters publicKey, Span<byte> buf)
+        {
+            m_privateKey.GenerateSecret((X25519PublicKeyParameters)publicKey, buf);
+        }
+#endif
+    }
+}
+#pragma warning restore
+#endif