ArmTrng.c File Reference

#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/ArmTrngLib.h>
#include <Protocol/Rng.h>
#include "RngDxeInternals.h"

Go to the source code of this file.

Functions
EFI_STATUS EFIAPI	GenerateEntropy (IN UINTN Length, OUT UINT8 *Entropy)

Detailed Description

RNG Driver to produce the UEFI Random Number Generator protocol.

The driver implements the EFI_RNG_ALGORITHM_RAW using the FW-TRNG interface to provide entropy.

Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file ArmTrng.c.

Function Documentation

GenerateEntropy()

EFI_STATUS EFIAPI GenerateEntropy	(	IN UINTN	Length,
		OUT UINT8 *	Entropy
	)

Generate high-quality entropy source using a TRNG or through RDRAND.

Parameters

[in]	Length	Size of the buffer, in bytes, to fill with.
[out]	Entropy	Pointer to the buffer to store the entropy data.

Return values

RETURN_SUCCESS	The function completed successfully.
RETURN_INVALID_PARAMETER	Invalid parameter.
RETURN_UNSUPPORTED	Function not implemented.
RETURN_BAD_BUFFER_SIZE	Buffer size is too small.
RETURN_NOT_READY	No Entropy available.

Definition at line 35 of file ArmTrng.c.