1 files changed, 46 insertions, 0 deletions
diff --git a/lib/NVault.Crypto.Noscrypt/src/NCExtensions.cs b/lib/NVault.Crypto.Noscrypt/src/NCExtensions.cs
new file mode 100644
index 0000000..875721f
--- /dev/null
+++ b/lib/NVault.Crypto.Noscrypt/src/NCExtensions.cs
@@ -0,0 +1,46 @@
+// 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.InteropServices;
+
+using static NVault.Crypto.Noscrypt.LibNoscrypt;
+
+namespace NVault.Crypto.Noscrypt
+{
+    public static class NCExtensions
+    {
+        public static void SignData(
+            this NostrCrypto 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(
+                in secKey,
+                in MemoryMarshal.GetReference(random32),
+                in MemoryMarshal.GetReference(data),
+                data.Length,
+                ref MemoryMarshal.GetReference(signatureBuffer)
+            );
+        }
+    }
+}