zircon/experimental/syscalls/cprng.test.fidl

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// !!! THIS FILE IS NOT YET USED !!!
// See //zircon/system/public/zircon/syscalls.banjo.
// !!! THIS FILE IS NOT YET USED !!!

library zz;

[Transport="Syscall"]
protocol Cprng {
    [Internal]
    DrawOnce() -> (status status, vector<byte> buffer);

    /// Draw from the kernel's CPRNG.
    [Vdsocall,
     In0="mutable<vector<byte>>"]
    Draw(vector<byte> buffer) -> ();

    /// Add entropy to the kernel CPRNG.
    AddEntropy(vector<byte> buffer) -> (status status);
};