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SecurityPkg: Add support for RngDxe on AARCH64 

AARCH64 support has been added to BaseRngLib via the optional
ARMv8.5 FEAT_RNG.

Refactor RngDxe to support AARCH64, note support for it in the
VALID_ARCHITECTURES line of RngDxe.inf and enable it in SecurityPkg.dsc.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Rebecca Cran 2021-05-10 15:53:08 -06:00 committed by mergify[bot]
parent 9301e5644c
commit 4e5ecdbac8
11 changed files with 481 additions and 176 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

126
SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c Normal file
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@ -0,0 +1,126 @@
/** @file
RNG Driver to produce the UEFI Random Number Generator protocol.
The driver will use the RNDR instruction to produce random numbers.
RNG Algorithms defined in UEFI 2.4:
- EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID
- EFI_RNG_ALGORITHM_RAW - Unsupported
- EFI_RNG_ALGORITHM_SP800_90_HMAC_256_GUID
- EFI_RNG_ALGORITHM_SP800_90_HASH_256_GUID
- EFI_RNG_ALGORITHM_X9_31_3DES_GUID - Unsupported
- EFI_RNG_ALGORITHM_X9_31_AES_GUID - Unsupported
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/TimerLib.h>
#include <Protocol/Rng.h>
#include "RngDxeInternals.h"
/**
Produces and returns an RNG value using either the default or specified RNG algorithm.
@param[in] This A pointer to the EFI_RNG_PROTOCOL instance.
@param[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.
@param[in] RNGValueLength The length in bytes of the memory buffer pointed to by
RNGValue. The driver shall return exactly this numbers of bytes.
@param[out] RNGValue A caller-allocated memory buffer filled by the driver with the
resulting RNG value.
@retval EFI_SUCCESS The RNG value was returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by RNGAlgorithm is not supported by
this driver.
@retval EFI_DEVICE_ERROR An RNG value could not be retrieved due to a hardware or
firmware error.
@retval EFI_NOT_READY There is not enough random data available to satisfy the length
requested by RNGValueLength.
@retval EFI_INVALID_PARAMETER RNGValue is NULL or RNGValueLength is zero.
**/
EFI_STATUS
EFIAPI
RngGetRNG (
IN EFI_RNG_PROTOCOL *This,
IN EFI_RNG_ALGORITHM *RNGAlgorithm, OPTIONAL
IN UINTN RNGValueLength,
OUT UINT8 *RNGValue
)
{
EFI_STATUS Status;
if ((RNGValueLength == 0) || (RNGValue == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (RNGAlgorithm == NULL) {
//
// Use the default RNG algorithm if RNGAlgorithm is NULL.
//
RNGAlgorithm = PcdGetPtr (PcdCpuRngSupportedAlgorithm);
}
if (CompareGuid (RNGAlgorithm, PcdGetPtr (PcdCpuRngSupportedAlgorithm))) {
Status = RngGetBytes (RNGValueLength, RNGValue);
return Status;
}
//
// Other algorithms are unsupported by this driver.
//
return EFI_UNSUPPORTED;
}
/**
Returns information about the random number generation implementation.
@param[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.
@param[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.
@retval EFI_SUCCESS The RNG algorithm list was returned successfully.
@retval EFI_BUFFER_TOO_SMALL The buffer RNGAlgorithmList is too small to hold the result.
**/
UINTN
EFIAPI
ArchGetSupportedRngAlgorithms (
IN OUT UINTN *RNGAlgorithmListSize,
OUT EFI_RNG_ALGORITHM *RNGAlgorithmList
)
{
UINTN RequiredSize;
EFI_RNG_ALGORITHM *CpuRngSupportedAlgorithm;
RequiredSize = sizeof (EFI_RNG_ALGORITHM);
if (*RNGAlgorithmListSize < RequiredSize) {
*RNGAlgorithmListSize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
CpuRngSupportedAlgorithm = PcdGetPtr (PcdCpuRngSupportedAlgorithm);
CopyMem(&RNGAlgorithmList[0], CpuRngSupportedAlgorithm, sizeof (EFI_RNG_ALGORITHM));
*RNGAlgorithmListSize = RequiredSize;
return EFI_SUCCESS;
}

0
SecurityPkg/RandomNumberGenerator/RngDxe/AesCore.c → SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c
View File

0
SecurityPkg/RandomNumberGenerator/RngDxe/AesCore.h → SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.h
View File

45
SecurityPkg/RandomNumberGenerator/RngDxe/RdRand.c → SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RdRand.c
View File

@ -8,48 +8,9 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/RngLib.h>
#include "RdRand.h"
#include "AesCore.h"
/**
Calls RDRAND to fill a buffer of arbitrary size with random bytes.
@param[in] Length Size of the buffer, in bytes, to fill with.
@param[out] RandBuffer Pointer to the buffer to store the random result.
@retval EFI_SUCCESS Random bytes generation succeeded.
@retval EFI_NOT_READY Failed to request random bytes.
**/
EFI_STATUS
EFIAPI
RdRandGetBytes (
IN UINTN Length,
OUT UINT8 *RandBuffer
)
{
BOOLEAN IsRandom;
UINT64 TempRand[2];
while (Length > 0) {
IsRandom = GetRandomNumber128 (TempRand);
if (!IsRandom) {
return EFI_NOT_READY;
}
if (Length >= sizeof (TempRand)) {
WriteUnaligned64 ((UINT64*)RandBuffer, TempRand[0]);
RandBuffer += sizeof (UINT64);
WriteUnaligned64 ((UINT64*)RandBuffer, TempRand[1]);
RandBuffer += sizeof (UINT64);
Length -= sizeof (TempRand);
} else {
CopyMem (RandBuffer, TempRand, Length);
Length = 0;
}
}
return EFI_SUCCESS;
}
#include "RdRand.h"
#include "RngDxeInternals.h"
/**
Creates a 128bit random value that is fully forward and backward prediction resistant,
@ -92,7 +53,7 @@ RdRandGetSeed128 (
//
for (Index = 0; Index < 32; Index++) {
MicroSecondDelay (10);
Status = RdRandGetBytes (16, RandByte);
Status = RngGetBytes (16, RandByte);
if (EFI_ERROR (Status)) {
return Status;
}

17
SecurityPkg/RandomNumberGenerator/RngDxe/RdRand.h → SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RdRand.h
View File

@ -23,23 +23,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/TimerLib.h>
#include <Protocol/Rng.h>
/**
Calls RDRAND to fill a buffer of arbitrary size with random bytes.
@param[in] Length Size of the buffer, in bytes, to fill with.
@param[out] RandBuffer Pointer to the buffer to store the random result.
@retval EFI_SUCCESS Random bytes generation succeeded.
@retval EFI_NOT_READY Failed to request random bytes.
**/
EFI_STATUS
EFIAPI
RdRandGetBytes (
IN UINTN Length,
OUT UINT8 *RandBuffer
);
/**
Generate high-quality entropy source through RDRAND.

145
SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c Normal file
View File

@ -0,0 +1,145 @@
/** @file
RNG Driver to produce the UEFI Random Number Generator protocol.
The driver will use the new RDRAND instruction to produce high-quality, high-performance
entropy and random number.
RNG Algorithms defined in UEFI 2.4:
- EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID - Supported
(RDRAND implements a hardware NIST SP800-90 AES-CTR-256 based DRBG)
- EFI_RNG_ALGORITHM_RAW - Supported
(Structuring RDRAND invocation can be guaranteed as high-quality entropy source)
- EFI_RNG_ALGORITHM_SP800_90_HMAC_256_GUID - Unsupported
- EFI_RNG_ALGORITHM_SP800_90_HASH_256_GUID - Unsupported
- EFI_RNG_ALGORITHM_X9_31_3DES_GUID - Unsupported
- EFI_RNG_ALGORITHM_X9_31_AES_GUID - Unsupported
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "RdRand.h"
#include "RngDxeInternals.h"
/**
Produces and returns an RNG value using either the default or specified RNG algorithm.
@param[in] This A pointer to the EFI_RNG_PROTOCOL instance.
@param[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.
@param[in] RNGValueLength The length in bytes of the memory buffer pointed to by
RNGValue. The driver shall return exactly this numbers of bytes.
@param[out] RNGValue A caller-allocated memory buffer filled by the driver with the
resulting RNG value.
@retval EFI_SUCCESS The RNG value was returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by RNGAlgorithm is not supported by
this driver.
@retval EFI_DEVICE_ERROR An RNG value could not be retrieved due to a hardware or
firmware error.
@retval EFI_NOT_READY There is not enough random data available to satisfy the length
requested by RNGValueLength.
@retval EFI_INVALID_PARAMETER RNGValue is NULL or RNGValueLength is zero.
**/
EFI_STATUS
EFIAPI
RngGetRNG (
IN EFI_RNG_PROTOCOL *This,
IN EFI_RNG_ALGORITHM *RNGAlgorithm, OPTIONAL
IN UINTN RNGValueLength,
OUT UINT8 *RNGValue
)
{
EFI_STATUS Status;
if ((RNGValueLength == 0) || (RNGValue == NULL)) {
return EFI_INVALID_PARAMETER;
}
Status = EFI_UNSUPPORTED;
if (RNGAlgorithm == NULL) {
//
// Use the default RNG algorithm if RNGAlgorithm is NULL.
//
RNGAlgorithm = &gEfiRngAlgorithmSp80090Ctr256Guid;
}
//
// NIST SP800-90-AES-CTR-256 supported by RDRAND
//
if (CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmSp80090Ctr256Guid)) {
Status = RngGetBytes (RNGValueLength, RNGValue);
return Status;
}
//
// The "raw" algorithm is intended to provide entropy directly
//
if (CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmRaw)) {
//
// When a DRBG is used on the output of a entropy source,
// its security level must be at least 256 bits according to UEFI Spec.
//
if (RNGValueLength < 32) {
return EFI_INVALID_PARAMETER;
}
Status = RdRandGenerateEntropy (RNGValueLength, RNGValue);
return Status;
}
//
// Other algorithms were unsupported by this driver.
//
return Status;
}
/**
Returns information about the random number generation implementation.
@param[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.
@param[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.
@retval EFI_SUCCESS The RNG algorithm list was returned successfully.
@retval EFI_BUFFER_TOO_SMALL The buffer RNGAlgorithmList is too small to hold the result.
**/
UINTN
EFIAPI
ArchGetSupportedRngAlgorithms (
IN OUT UINTN *RNGAlgorithmListSize,
OUT EFI_RNG_ALGORITHM *RNGAlgorithmList
)
{
UINTN RequiredSize;
EFI_RNG_ALGORITHM *CpuRngSupportedAlgorithm;
RequiredSize = 2 * sizeof (EFI_RNG_ALGORITHM);
if (*RNGAlgorithmListSize < RequiredSize) {
*RNGAlgorithmListSize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
CpuRngSupportedAlgorithm = PcdGetPtr (PcdCpuRngSupportedAlgorithm);
CopyMem(&RNGAlgorithmList[0], CpuRngSupportedAlgorithm, sizeof (EFI_RNG_ALGORITHM));
// x86 platforms also support EFI_RNG_ALGORITHM_RAW via RDSEED
CopyMem(&RNGAlgorithmList[1], &gEfiRngAlgorithmRaw, sizeof (EFI_RNG_ALGORITHM));
*RNGAlgorithmListSize = RequiredSize;
return EFI_SUCCESS;
}

170
SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.c
View File

@ -1,34 +1,32 @@
/** @file
RNG Driver to produce the UEFI Random Number Generator protocol.
The driver will use the new RDRAND instruction to produce high-quality, high-performance
entropy and random number.
The driver uses CPU RNG instructions to produce high-quality,
high-performance entropy and random number.
RNG Algorithms defined in UEFI 2.4:
- EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID - Supported
(RDRAND implements a hardware NIST SP800-90 AES-CTR-256 based DRBG)
- EFI_RNG_ALGORITHM_RAW - Supported
(Structuring RDRAND invocation can be guaranteed as high-quality entropy source)
- EFI_RNG_ALGORITHM_SP800_90_HMAC_256_GUID - Unsupported
- EFI_RNG_ALGORITHM_SP800_90_HASH_256_GUID - Unsupported
- EFI_RNG_ALGORITHM_X9_31_3DES_GUID - Unsupported
- EFI_RNG_ALGORITHM_X9_31_AES_GUID - Unsupported
- EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID
- EFI_RNG_ALGORITHM_RAW
- EFI_RNG_ALGORITHM_SP800_90_HMAC_256_GUID
- EFI_RNG_ALGORITHM_SP800_90_HASH_256_GUID
- EFI_RNG_ALGORITHM_X9_31_3DES_GUID
- EFI_RNG_ALGORITHM_X9_31_AES_GUID
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "RdRand.h"
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/RngLib.h>
#include <Library/TimerLib.h>
#include <Protocol/Rng.h>
//
// Supported RNG Algorithms list by this driver.
//
EFI_RNG_ALGORITHM mSupportedRngAlgorithms[] = {
EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID,
EFI_RNG_ALGORITHM_RAW
};
#include "RngDxeInternals.h"
/**
Returns information about the random number generation implementation.
@ -62,103 +60,20 @@ RngGetInfo (
)
{
EFI_STATUS Status;
UINTN RequiredSize;
if ((This == NULL) || (RNGAlgorithmListSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
RequiredSize = sizeof (mSupportedRngAlgorithms);
if (*RNGAlgorithmListSize < RequiredSize) {
Status = EFI_BUFFER_TOO_SMALL;
//
// Return algorithm list supported by driver.
//
if (RNGAlgorithmList != NULL) {
Status = ArchGetSupportedRngAlgorithms (RNGAlgorithmListSize, RNGAlgorithmList);
} else {
//
// Return algorithm list supported by driver.
//
if (RNGAlgorithmList != NULL) {
CopyMem (RNGAlgorithmList, mSupportedRngAlgorithms, RequiredSize);
Status = EFI_SUCCESS;
} else {
Status = EFI_INVALID_PARAMETER;
}
}
*RNGAlgorithmListSize = RequiredSize;
return Status;
}
/**
Produces and returns an RNG value using either the default or specified RNG algorithm.
@param[in] This A pointer to the EFI_RNG_PROTOCOL instance.
@param[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.
@param[in] RNGValueLength The length in bytes of the memory buffer pointed to by
RNGValue. The driver shall return exactly this numbers of bytes.
@param[out] RNGValue A caller-allocated memory buffer filled by the driver with the
resulting RNG value.
@retval EFI_SUCCESS The RNG value was returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by RNGAlgorithm is not supported by
this driver.
@retval EFI_DEVICE_ERROR An RNG value could not be retrieved due to a hardware or
firmware error.
@retval EFI_NOT_READY There is not enough random data available to satisfy the length
requested by RNGValueLength.
@retval EFI_INVALID_PARAMETER RNGValue is NULL or RNGValueLength is zero.
**/
EFI_STATUS
EFIAPI
RngGetRNG (
IN EFI_RNG_PROTOCOL *This,
IN EFI_RNG_ALGORITHM *RNGAlgorithm, OPTIONAL
IN UINTN RNGValueLength,
OUT UINT8 *RNGValue
)
{
EFI_STATUS Status;
if ((RNGValueLength == 0) || (RNGValue == NULL)) {
return EFI_INVALID_PARAMETER;
Status = EFI_INVALID_PARAMETER;
}
Status = EFI_UNSUPPORTED;
if (RNGAlgorithm == NULL) {
//
// Use the default RNG algorithm if RNGAlgorithm is NULL.
//
RNGAlgorithm = &gEfiRngAlgorithmSp80090Ctr256Guid;
}
//
// NIST SP800-90-AES-CTR-256 supported by RDRAND
//
if (CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmSp80090Ctr256Guid)) {
Status = RdRandGetBytes (RNGValueLength, RNGValue);
return Status;
}
//
// The "raw" algorithm is intended to provide entropy directly
//
if (CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmRaw)) {
//
// When a DRBG is used on the output of a entropy source,
// its security level must be at least 256 bits according to UEFI Spec.
//
if (RNGValueLength < 32) {
return EFI_INVALID_PARAMETER;
}
Status = RdRandGenerateEntropy (RNGValueLength, RNGValue);
return Status;
}
//
// Other algorithms were unsupported by this driver.
//
return Status;
}
@ -204,3 +119,44 @@ RngDriverEntry (
return Status;
}
/**
Calls RDRAND to fill a buffer of arbitrary size with random bytes.
@param[in] Length Size of the buffer, in bytes, to fill with.
@param[out] RandBuffer Pointer to the buffer to store the random result.
@retval EFI_SUCCESS Random bytes generation succeeded.
@retval EFI_NOT_READY Failed to request random bytes.
**/
EFI_STATUS
EFIAPI
RngGetBytes (
IN UINTN Length,
OUT UINT8 *RandBuffer
)
{
BOOLEAN IsRandom;
UINT64 TempRand[2];
while (Length > 0) {
IsRandom = GetRandomNumber128 (TempRand);
if (!IsRandom) {
return EFI_NOT_READY;
}
if (Length >= sizeof (TempRand)) {
WriteUnaligned64 ((UINT64*)RandBuffer, TempRand[0]);
RandBuffer += sizeof (UINT64);
WriteUnaligned64 ((UINT64*)RandBuffer, TempRand[1]);
RandBuffer += sizeof (UINT64);
Length -= sizeof (TempRand);
} else {
CopyMem (RandBuffer, TempRand, Length);
Length = 0;
}
}
return EFI_SUCCESS;
}

24
SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
View File

@ -26,15 +26,22 @@
#
# The following information is for reference only and not required by the build tools.
#
# VALID_ARCHITECTURES = IA32 X64
# VALID_ARCHITECTURES = IA32 X64 AARCH64
#
[Sources.common]
RngDxe.c
RdRand.c
RdRand.h
AesCore.c
AesCore.h
RngDxeInternals.h
[Sources.IA32, Sources.X64]
Rand/RngDxe.c
Rand/RdRand.c
Rand/RdRand.h
Rand/AesCore.c
Rand/AesCore.h
[Sources.AARCH64]
AArch64/RngDxe.c
[Packages]
MdePkg/MdePkg.dec
@ -50,12 +57,19 @@
RngLib
[Guids]
gEfiRngAlgorithmSp80090Hash256Guid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
gEfiRngAlgorithmSp80090Hmac256Guid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
gEfiRngAlgorithmSp80090Ctr256Guid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
gEfiRngAlgorithmX9313DesGuid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
gEfiRngAlgorithmX931AesGuid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
gEfiRngAlgorithmRaw ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
[Protocols]
gEfiRngProtocolGuid ## PRODUCES
[Pcd]
gEfiSecurityPkgTokenSpaceGuid.PcdCpuRngSupportedAlgorithm ## CONSUMES
[Depex]
TRUE

117
SecurityPkg/RandomNumberGenerator/RngDxe/RngDxeInternals.h Normal file
View File

@ -0,0 +1,117 @@
/** @file
Function prototypes for UEFI Random Number Generator protocol support.
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef RNGDXE_INTERNALS_H_
#define RNGDXE_INTERNALS_H_
/**
Returns information about the random number generation implementation.
@param[in] This A pointer to the EFI_RNG_PROTOCOL instance.
@param[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.
@param[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.
@retval EFI_SUCCESS The RNG algorithm list was returned successfully.
@retval EFI_UNSUPPORTED The services is not supported by this driver.
@retval EFI_DEVICE_ERROR The list of algorithms could not be retrieved due to a
hardware or firmware error.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
@retval EFI_BUFFER_TOO_SMALL The buffer RNGAlgorithmList is too small to hold the result.
**/
EFI_STATUS
EFIAPI
RngGetInfo (
IN EFI_RNG_PROTOCOL *This,
IN OUT UINTN *RNGAlgorithmListSize,
OUT EFI_RNG_ALGORITHM *RNGAlgorithmList
);
/**
Produces and returns an RNG value using either the default or specified RNG algorithm.
@param[in] This A pointer to the EFI_RNG_PROTOCOL instance.
@param[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.
@param[in] RNGValueLength The length in bytes of the memory buffer pointed to by
RNGValue. The driver shall return exactly this numbers of bytes.
@param[out] RNGValue A caller-allocated memory buffer filled by the driver with the
resulting RNG value.
@retval EFI_SUCCESS The RNG value was returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by RNGAlgorithm is not supported by
this driver.
@retval EFI_DEVICE_ERROR An RNG value could not be retrieved due to a hardware or
firmware error.
@retval EFI_NOT_READY There is not enough random data available to satisfy the length
requested by RNGValueLength.
@retval EFI_INVALID_PARAMETER RNGValue is NULL or RNGValueLength is zero.
**/
EFI_STATUS
EFIAPI
RngGetRNG (
IN EFI_RNG_PROTOCOL *This,
IN EFI_RNG_ALGORITHM *RNGAlgorithm, OPTIONAL
IN UINTN RNGValueLength,
OUT UINT8 *RNGValue
);
/**
Returns information about the random number generation implementation.
@param[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.
@param[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.
@retval EFI_SUCCESS The RNG algorithm list was returned successfully.
@retval EFI_BUFFER_TOO_SMALL The buffer RNGAlgorithmList is too small to hold the result.
**/
UINTN
EFIAPI
ArchGetSupportedRngAlgorithms (
IN OUT UINTN *RNGAlgorithmListSize,
OUT EFI_RNG_ALGORITHM *RNGAlgorithmList
);
/**
Runs CPU RNG instruction to fill a buffer of arbitrary size with random bytes.
@param[in] Length Size of the buffer, in bytes, to fill with.
@param[out] RandBuffer Pointer to the buffer to store the random result.
@retval EFI_SUCCESS Random bytes generation succeeded.
@retval EFI_NOT_READY Failed to request random bytes.
**/
EFI_STATUS
EFIAPI
RngGetBytes (
IN UINTN Length,
OUT UINT8 *RandBuffer
);
#endif // RNGDXE_INTERNALS_H_

2
SecurityPkg/SecurityPkg.dec
View File

@ -297,6 +297,8 @@
gEfiSecurityPkgTokenSpaceGuid.PcdStatusCodeFvVerificationPass|0x0303100A|UINT32|0x00010030
gEfiSecurityPkgTokenSpaceGuid.PcdStatusCodeFvVerificationFail|0x0303100B|UINT32|0x00010031
gEfiSecurityPkgTokenSpaceGuid.PcdCpuRngSupportedAlgorithm|{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}|VOID*|0x00010032
[PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
## Image verification policy for OptionRom. Only following values are valid:<BR><BR>
# NOTE: Do NOT use 0x5 and 0x2 since it violates the UEFI specification and has been removed.<BR>

11
SecurityPkg/SecurityPkg.dsc
View File

@ -259,6 +259,12 @@
[Components.IA32, Components.X64, Components.ARM, Components.AARCH64]
SecurityPkg/Library/AuthVariableLib/AuthVariableLib.inf
[Components.IA32, Components.X64, Components.AARCH64]
#
# Random Number Generator
#
SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
[Components.IA32, Components.X64]
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
@ -334,11 +340,6 @@
SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPresenceLib.inf
SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/StandaloneMmTcg2PhysicalPresenceLib.inf
#
# Random Number Generator
#
SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
#
# Opal Password solution
#