1 files changed, 75 insertions, 0 deletions
diff --git a/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NoscryptExtensions.cs b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NoscryptExtensions.cs
new file mode 100644
index 0000000..e96ff96
--- /dev/null
+++ b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NoscryptExtensions.cs
@@ -0,0 +1,75 @@
+// Copyright (C) 2024 Vaughn Nugent
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using static VNLib.Utils.Cryptography.Noscrypt.NoscryptLibrary;
+
+namespace VNLib.Utils.Cryptography.Noscrypt
+{
+
+    public static class NoscryptExtensions
+    {
+        public static void SignData(
+            this INostrCrypto lib,
+            ref readonly NCSecretKey secKey,
+            ReadOnlySpan<byte> random32,
+            ReadOnlySpan<byte> data,
+            Span<byte> signatureBuffer
+        )
+        {
+            ArgumentOutOfRangeException.ThrowIfLessThan(signatureBuffer.Length, NC_SIGNATURE_SIZE, nameof(signatureBuffer));
+            ArgumentOutOfRangeException.ThrowIfLessThan(random32.Length, 32, nameof(random32));
+            ArgumentOutOfRangeException.ThrowIfZero(data.Length, nameof(data));
+
+            lib.SignData(
+                secretKey: in secKey,
+                random32: in MemoryMarshal.GetReference(random32),
+                data: in MemoryMarshal.GetReference(data),
+                dataSize: (uint)data.Length,
+                sig64: ref MemoryMarshal.GetReference(signatureBuffer)
+            );
+        }
+
+#if DEBUG
+        /*
+         * Conversation key is not meant to be a public api. Callers 
+         * should use Encrypt/Decrypt methods to handle encryption.
+         * 
+         * This method exists for vector testing purposes only.
+         */
+        public static void GetConverstationKey(
+            this NostrCrypto lib,
+            ref readonly NCSecretKey secretKey,
+            ref readonly NCPublicKey publicKey,
+            Span<byte> conversationKeyOut32
+        )
+        {
+            ArgumentNullException.ThrowIfNull(lib);
+            ArgumentOutOfRangeException.ThrowIfNotEqual(conversationKeyOut32.Length, NC_CONVERSATION_KEY_SIZE, nameof(conversationKeyOut32));
+
+            //Get the conversation key
+            lib.GetConverstationKey(
+                secretKey: in secretKey,
+                publicKey: in publicKey,
+                key32: ref MemoryMarshal.GetReference(conversationKeyOut32)
+            );
+
+        }
+#endif
+    }
+}