Imported Upstream version 1.0.0.9127upstream/1.0.0.9127

1 files changed, 26 insertions, 0 deletions

diff --git a/src/mscorlib/corefx/Interop/Windows/BCrypt/Interop.BCryptGenRandom.cs b/src/mscorlib/corefx/Interop/Windows/BCrypt/Interop.BCryptGenRandom.cs
new file mode 100644
index 0000000000..d2ce4131b0
--- /dev/null
+++ b/src/mscorlib/corefx/Interop/Windows/BCrypt/Interop.BCryptGenRandom.cs
@@ -0,0 +1,26 @@
+// 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 partial class BCrypt
+    {
+        internal static unsafe NTSTATUS BCryptGenRandom(byte* pbBuffer, int count)
+        {
+            Debug.Assert(pbBuffer != null);
+            Debug.Assert(count >= 0);
+
+            return BCryptGenRandom(IntPtr.Zero, pbBuffer, count, BCRYPT_USE_SYSTEM_PREFERRED_RNG);
+        }
+
+        private const int BCRYPT_USE_SYSTEM_PREFERRED_RNG = 0x00000002;
+
+        [DllImport(Libraries.BCrypt, CharSet = CharSet.Unicode)]
+        private static unsafe extern NTSTATUS BCryptGenRandom(IntPtr hAlgorithm, byte* pbBuffer, int cbBuffer, int dwFlags);
+    }
+}