1 files changed, 29 insertions, 0 deletions
diff --git a/src/System.Private.CoreLib/shared/Interop/Windows/BCrypt/Interop.BCryptGenRandom.GetRandomBytes.cs b/src/System.Private.CoreLib/shared/Interop/Windows/BCrypt/Interop.BCryptGenRandom.GetRandomBytes.cs
new file mode 100644
index 000000000..4d75163d4
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/Interop/Windows/BCrypt/Interop.BCryptGenRandom.GetRandomBytes.cs
@@ -0,0 +1,29 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+internal partial class Interop
+{
+    internal static unsafe void GetRandomBytes(byte* buffer, int length)
+    {
+        Debug.Assert(buffer != null);
+        Debug.Assert(length >= 0);
+
+        BCrypt.NTSTATUS status = BCrypt.BCryptGenRandom(IntPtr.Zero, buffer, length, BCrypt.BCRYPT_USE_SYSTEM_PREFERRED_RNG);
+        if (status != BCrypt.NTSTATUS.STATUS_SUCCESS)
+        {
+            if (status == BCrypt.NTSTATUS.STATUS_NO_MEMORY)
+            {
+                throw new OutOfMemoryException();
+            }
+            else
+            {
+                throw new InvalidOperationException();
+            }
+        }
+    }
+}