zircon/vdso/cprng.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.
library zx;

@transport("Syscall")
protocol cprng {
    @internal
    cprng_draw_once() -> (struct {
        status status;
        buffer vector_void;
    });

    /// Draw from the kernel's CPRNG.
    @vdsocall
    cprng_draw() -> (struct {
        buffer vector_void;
    });

    /// Add entropy to the kernel CPRNG.
    cprng_add_entropy(struct {
        buffer vector_void;
    }) -> (struct {
        status status;
    });
};