Functions | |
EFI_STATUS EFIAPI | RngGetInfo (IN EFI_RNG_PROTOCOL *This, IN OUT UINTN *RNGAlgorithmListSize, OUT EFI_RNG_ALGORITHM *RNGAlgorithmList) |
EFI_STATUS EFIAPI | RngGetRNG (IN EFI_RNG_PROTOCOL *This, IN EFI_RNG_ALGORITHM *RNGAlgorithm, IN UINTN RNGValueLength, OUT UINT8 *RNGValue) |
EFI_STATUS EFIAPI | RngDriverEntry (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable) |
Variables | |
EFI_RNG_ALGORITHM | mSupportedRngAlgorithms [] |
EFI_RNG_PROTOCOL | mRngRdRand |
The driver will use the new RDRAND instruction to produce high-quality, high-performance entropy and random number.
RNG Algoritnms defined in UEFI 2.4:
Copyright (c) 2013, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
EFI_STATUS EFIAPI RngDriverEntry | ( | IN EFI_HANDLE | ImageHandle, | |
IN EFI_SYSTEM_TABLE * | SystemTable | |||
) |
The user Entry Point for the Random Number Generator (RNG) driver.
[in] | ImageHandle | The firmware allocated handle for the EFI image. |
[in] | SystemTable | A pointer to the EFI System Table. |
EFI_SUCCESS | The entry point is executed successfully. | |
EFI_NOT_SUPPORTED | Platform does not support RNG. | |
Other | Some error occurs when executing this entry point. |
References EFI_STATUS(), IsRdRandSupported(), and mRngRdRand.
EFI_STATUS EFIAPI RngGetInfo | ( | IN EFI_RNG_PROTOCOL * | This, | |
IN OUT UINTN * | RNGAlgorithmListSize, | |||
OUT EFI_RNG_ALGORITHM * | RNGAlgorithmList | |||
) |
Returns information about the random number generation implementation.
[in] | This | A pointer to the EFI_RNG_PROTOCOL instance. |
[in,out] | RNGAlgorithmListSize | On input, the size in bytes of RNGAlgorithmList. On output with a return code of EFI_SUCCESS, the size in bytes of the data returned in RNGAlgorithmList. On output with a return code of EFI_BUFFER_TOO_SMALL, the size of RNGAlgorithmList required to obtain the list. |
[out] | RNGAlgorithmList | A caller-allocated memory buffer filled by the driver with one EFI_RNG_ALGORITHM element for each supported RNG algorithm. The list must not change across multiple calls to the same driver. The first algorithm in the list is the default algorithm for the driver. |
EFI_SUCCESS | The RNG algorithm list was returned successfully. | |
EFI_UNSUPPORTED | The services is not supported by this driver. | |
EFI_DEVICE_ERROR | The list of algorithms could not be retrieved due to a hardware or firmware error. | |
EFI_INVALID_PARAMETER | One or more of the parameters are incorrect. | |
EFI_BUFFER_TOO_SMALL | The buffer RNGAlgorithmList is too small to hold the result. |
References EFI_STATUS(), mSupportedRngAlgorithms, and UINTN().
EFI_STATUS EFIAPI RngGetRNG | ( | IN EFI_RNG_PROTOCOL * | This, | |
IN EFI_RNG_ALGORITHM * | RNGAlgorithm, | |||
IN UINTN | RNGValueLength, | |||
OUT UINT8 * | RNGValue | |||
) |
Produces and returns an RNG value using either the default or specified RNG algorithm.
[in] | This | A pointer to the EFI_RNG_PROTOCOL instance. |
[in] | RNGAlgorithm | A pointer to the EFI_RNG_ALGORITHM that identifies the RNG algorithm to use. May be NULL in which case the function will use its default RNG algorithm. |
[in] | RNGValueLength | The length in bytes of the memory buffer pointed to by RNGValue. The driver shall return exactly this numbers of bytes. |
[out] | RNGValue | A caller-allocated memory buffer filled by the driver with the resulting RNG value. |
EFI_SUCCESS | The RNG value was returned successfully. | |
EFI_UNSUPPORTED | The algorithm specified by RNGAlgorithm is not supported by this driver. | |
EFI_DEVICE_ERROR | An RNG value could not be retrieved due to a hardware or firmware error. | |
EFI_NOT_READY | There is not enough random data available to satisfy the length requested by RNGValueLength. | |
EFI_INVALID_PARAMETER | RNGValue is NULL or RNGValueLength is zero. |
References EFI_STATUS(), RdRandGenerateEntropy(), and RdRandGetBytes().
EFI_RNG_PROTOCOL mRngRdRand |
EFI_RNG_ALGORITHM mSupportedRngAlgorithms[] |
Initial value:
{ EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID, EFI_RNG_ALGORITHM_RAW }
Referenced by RngGetInfo().