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[edk2-devel] [PATCH v9 2/5] MdePkg: BaseRngLibDxe: Add RngLib that uses RngDxe

Matthew Carlson posted 5 patches 5 years, 5 months ago
There is a newer version of this series
[edk2-devel] [PATCH v9 2/5] MdePkg: BaseRngLibDxe: Add RngLib that uses RngDxe
Posted by Matthew Carlson 5 years, 5 months ago 
From: Matthew Carlson <macarl@microsoft.com>

This adds a RngLib that uses the RngProtocol to provide randomness.
This means that the RngLib is meant to be used with DXE_DRIVERS.

Ref: https://github.com/tianocore/edk2/pull/845
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1871

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Matthew Carlson <matthewfcarlson@gmail.com>
---
 MdePkg/Library/DxeRngLib/DxeRngLib.c   | 199 ++++++++++++++++++++
 MdePkg/Library/DxeRngLib/DxeRngLib.inf |  38 ++++
 MdePkg/Library/DxeRngLib/DxeRngLib.uni |  15 ++
 MdePkg/MdePkg.dsc                      |   4 +-
 4 files changed, 255 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.c b/MdePkg/Library/DxeRngLib/DxeRngLib.c
new file mode 100644
index 000000000000..8d4e05e52d57
--- /dev/null
+++ b/MdePkg/Library/DxeRngLib/DxeRngLib.c
@@ -0,0 +1,199 @@
+/** @file
+ Provides an implementation of the library class RngLib that uses the Rng protocol.
+
+ Copyright (c) Microsoft Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#include <Uefi.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DebugLib.h>
+#include <Library/RngLib.h>
+#include <Protocol/Rng.h>
+
+/**
+  Routine Description:
+
+  Generates a random number via the NIST
+  800-9A algorithm.  Refer to
+  http://csrc.nist.gov/groups/STM/cavp/documents/drbg/DRBGVS.pdf
+  for more information.
+
+  @param[out] Buffer      Buffer to receive the random number.
+  @param[in]  BufferSize  Number of bytes in Buffer.
+
+  @retval EFI_SUCCESS or underlying failure code.
+**/
+STATIC
+EFI_STATUS
+GenerateRandomNumberViaNist800Algorithm (
+  OUT UINT8  *Buffer,
+  IN  UINTN  BufferSize
+  )
+{
+  EFI_STATUS        Status;
+  EFI_RNG_PROTOCOL  *RngProtocol;
+
+  RngProtocol = NULL;
+
+  if (Buffer == NULL) {
+      DEBUG((DEBUG_ERROR, "%a: Buffer == NULL.\n", __FUNCTION__));
+      return EFI_INVALID_PARAMETER;
+  }
+
+  Status = gBS->LocateProtocol (&gEfiRngProtocolGuid, NULL, (VOID **)&RngProtocol);
+  if (EFI_ERROR (Status) || RngProtocol == NULL) {
+      DEBUG((DEBUG_ERROR, "%a: Could not locate RNG prototocol, Status = %r\n", __FUNCTION__, Status));
+      return Status;
+  }
+
+  Status = RngProtocol->GetRNG (RngProtocol, &gEfiRngAlgorithmSp80090Ctr256Guid, BufferSize, Buffer);
+  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm CTR-256 - Status = %r\n", __FUNCTION__, Status));
+  if (!EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = RngProtocol->GetRNG (RngProtocol, &gEfiRngAlgorithmSp80090Hmac256Guid, BufferSize, Buffer);
+  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm HMAC-256 - Status = %r\n", __FUNCTION__, Status));
+  if (!EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = RngProtocol->GetRNG (RngProtocol, &gEfiRngAlgorithmSp80090Hash256Guid, BufferSize, Buffer);
+  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm Hash-256 - Status = %r\n", __FUNCTION__, Status));
+  if (!EFI_ERROR (Status)) {
+    return Status;
+  }
+  // If all the other methods have failed, use the default method from the RngProtocol
+  Status = RngProtocol->GetRNG (RngProtocol, NULL, BufferSize, Buffer);
+  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm Hash-256 - Status = %r\n", __FUNCTION__, Status));
+  if (!EFI_ERROR (Status)) {
+    return Status;
+  }
+  // If we get to this point, we have failed
+  DEBUG((DEBUG_ERROR, "%a: GetRNG() failed, staus = %r\n", __FUNCTION__, Status));
+
+  return Status;
+}// GenerateRandomNumberViaNist800Algorithm()
+
+
+/**
+  Generates a 16-bit random number.
+
+  if Rand is NULL, return FALSE.
+
+  @param[out] Rand     Buffer pointer to store the 16-bit random value.
+
+  @retval TRUE         Random number generated successfully.
+  @retval FALSE        Failed to generate the random number.
+
+**/
+BOOLEAN
+EFIAPI
+GetRandomNumber16 (
+  OUT UINT16  *Rand
+  )
+{
+  EFI_STATUS Status;
+
+  if (Rand == NULL)
+  {
+    return FALSE;
+  }
+
+  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8 *)Rand, 2);
+  if (EFI_ERROR (Status)) {
+    return FALSE;
+  }
+  return TRUE;
+}
+
+/**
+  Generates a 32-bit random number.
+
+  if Rand is NULL, return FALSE.
+
+  @param[out] Rand     Buffer pointer to store the 32-bit random value.
+
+  @retval TRUE         Random number generated successfully.
+  @retval FALSE        Failed to generate the random number.
+
+**/
+BOOLEAN
+EFIAPI
+GetRandomNumber32 (
+  OUT UINT32 *Rand
+  )
+{
+  EFI_STATUS Status;
+
+  if (Rand == NULL) {
+    return FALSE;
+  }
+
+  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand, 4);
+  if (EFI_ERROR (Status)) {
+    return FALSE;
+  }
+  return TRUE;
+}
+
+/**
+  Generates a 64-bit random number.
+
+  if Rand is NULL, return FALSE.
+
+  @param[out] Rand     Buffer pointer to store the 64-bit random value.
+
+  @retval TRUE         Random number generated successfully.
+  @retval FALSE        Failed to generate the random number.
+
+**/
+BOOLEAN
+EFIAPI
+GetRandomNumber64 (
+  OUT UINT64 *Rand
+  )
+{
+  EFI_STATUS Status;
+
+  if (Rand == NULL) {
+    return FALSE;
+  }
+
+  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand, 8);
+  if (EFI_ERROR (Status)) {
+    return FALSE;
+  }
+  return TRUE;
+}
+
+/**
+  Generates a 128-bit random number.
+
+  if Rand is NULL, return FALSE.
+
+  @param[out] Rand     Buffer pointer to store the 128-bit random value.
+
+  @retval TRUE         Random number generated successfully.
+  @retval FALSE        Failed to generate the random number.
+
+**/
+BOOLEAN
+EFIAPI
+GetRandomNumber128 (
+  OUT UINT64 *Rand
+  )
+{
+  EFI_STATUS Status;
+
+  if (Rand == NULL) {
+    return FALSE;
+  }
+
+  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand, 16);
+  if (EFI_ERROR (Status)) {
+    return FALSE;
+  }
+  return TRUE;
+}
diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.inf b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
new file mode 100644
index 000000000000..68554ad21146
--- /dev/null
+++ b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
@@ -0,0 +1,38 @@
+# @file
+# Provides implementation of the library class RngLib that uses the RngProtocol
+#
+# @copyright
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION     = 1.27
+  BASE_NAME       = DxeRngLib
+  MODULE_UNI_FILE = DxeRngLib.uni
+  FILE_GUID       = FF9F84C5-A33E-44E3-9BB5-0D654B2D4149
+  MODULE_TYPE     = DXE_DRIVER
+  VERSION_STRING  = 1.0
+  LIBRARY_CLASS   = RngLib|DXE_DRIVER UEFI_APPLICATION UEFI_DRIVER
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[Sources]
+  DxeRngLib.c
+
+[LibraryClasses]
+  DebugLib
+  UefiBootServicesTableLib
+
+[Protocols]
+  gEfiRngProtocolGuid                 ## CONSUMES
+
+[Depex]
+  gEfiRngProtocolGuid
+
+[Guids]
+  gEfiRngAlgorithmSp80090Ctr256Guid
+  gEfiRngAlgorithmSp80090Hash256Guid
+  gEfiRngAlgorithmSp80090Hmac256Guid
diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.uni b/MdePkg/Library/DxeRngLib/DxeRngLib.uni
new file mode 100644
index 000000000000..c904e54b6fb0
--- /dev/null
+++ b/MdePkg/Library/DxeRngLib/DxeRngLib.uni
@@ -0,0 +1,15 @@
+// @file
+// Instance of RNG (Random Number Generator) Library.
+//
+// RngLib that uses the Rng Protocol to provide random numbers.
+//
+// Copyright (c) Microsoft Corporation.
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+
+
+#string STR_MODULE_ABSTRACT     #language en-US "Instance of RNG Library"
+
+#string STR_MODULE_DESCRIPTION  #language en-US "BaseRng Library that uses the Rng Protocol to provide random numbers"
+
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index d7ba3a730909..2c3b7966b086 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -62,8 +62,10 @@
   MdePkg/Library/BasePostCodeLibPort80/BasePostCodeLibPort80.inf
   MdePkg/Library/BasePrintLib/BasePrintLib.inf
   MdePkg/Library/BaseReportStatusCodeLibNull/BaseReportStatusCodeLibNull.inf
-  MdePkg/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf
+  MdePkg/Library/DxeRngLib/DxeRngLib.inf
   MdePkg/Library/BaseRngLibNull/BaseRngLibNull.inf
+  MdePkg/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf
+
   MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf
   MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
   MdePkg/Library/BaseTimerLibNullTemplate/BaseTimerLibNullTemplate.inf
-- 
2.28.0.windows.1


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回复: [edk2-devel] [PATCH v9 2/5] MdePkg: BaseRngLibDxe: Add RngLib that uses RngDxe
Posted by gaoliming 5 years, 5 months ago 
Matthew:

> -----邮件原件-----
> 发件人: bounce+27952+64654+4905953+8761045@groups.io
> <bounce+27952+64654+4905953+8761045@groups.io> 代表 Matthew
> Carlson
> 发送时间: 2020年8月27日 4:55
> 收件人: devel@edk2.groups.io
> 抄送: Ard Biesheuvel <ard.biesheuvel@arm.com>; Michael D Kinney
> <michael.d.kinney@intel.com>; Liming Gao <liming.gao@intel.com>;
> Zhiguang Liu <zhiguang.liu@intel.com>; Matthew Carlson
> <matthewfcarlson@gmail.com>
> 主题: [edk2-devel] [PATCH v9 2/5] MdePkg: BaseRngLibDxe: Add RngLib that
> uses RngDxe
> 
> From: Matthew Carlson <macarl@microsoft.com>
> 
> This adds a RngLib that uses the RngProtocol to provide randomness.
> This means that the RngLib is meant to be used with DXE_DRIVERS.
> 
> Ref: https://github.com/tianocore/edk2/pull/845
> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1871
> 
> Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> Signed-off-by: Matthew Carlson <matthewfcarlson@gmail.com>
> ---
>  MdePkg/Library/DxeRngLib/DxeRngLib.c   | 199 ++++++++++++++++++++
>  MdePkg/Library/DxeRngLib/DxeRngLib.inf |  38 ++++
>  MdePkg/Library/DxeRngLib/DxeRngLib.uni |  15 ++
>  MdePkg/MdePkg.dsc                      |   4 +-
>  4 files changed, 255 insertions(+), 1 deletion(-)
> 
> diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.c
> b/MdePkg/Library/DxeRngLib/DxeRngLib.c
> new file mode 100644
> index 000000000000..8d4e05e52d57
> --- /dev/null
> +++ b/MdePkg/Library/DxeRngLib/DxeRngLib.c
> @@ -0,0 +1,199 @@
> +/** @file
> 
> + Provides an implementation of the library class RngLib that uses the Rng
> protocol.
> 
> +
> 
> + Copyright (c) Microsoft Corporation. All rights reserved.
> 
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +
> 
> +**/
> 
> +#include <Uefi.h>
> 
> +#include <Library/UefiBootServicesTableLib.h>
> 
> +#include <Library/DebugLib.h>
> 
> +#include <Library/RngLib.h>
> 
> +#include <Protocol/Rng.h>
> 
> +
> 
> +/**
> 
> +  Routine Description:
> 
> +
> 
> +  Generates a random number via the NIST
> 
> +  800-9A algorithm.  Refer to
> 
> +  http://csrc.nist.gov/groups/STM/cavp/documents/drbg/DRBGVS.pdf
> 
> +  for more information.
> 
> +
> 
> +  @param[out] Buffer      Buffer to receive the random number.
> 
> +  @param[in]  BufferSize  Number of bytes in Buffer.
> 
> +
> 
> +  @retval EFI_SUCCESS or underlying failure code.
> 
> +**/
> 
> +STATIC
> 
> +EFI_STATUS
> 
> +GenerateRandomNumberViaNist800Algorithm (
> 
> +  OUT UINT8  *Buffer,
> 
> +  IN  UINTN  BufferSize
> 
> +  )
> 
> +{
> 
> +  EFI_STATUS        Status;
> 
> +  EFI_RNG_PROTOCOL  *RngProtocol;
> 
> +
> 
> +  RngProtocol = NULL;
> 
> +
> 
> +  if (Buffer == NULL) {
> 
> +      DEBUG((DEBUG_ERROR, "%a: Buffer == NULL.\n",
> __FUNCTION__));
> 
> +      return EFI_INVALID_PARAMETER;
> 
> +  }
> 
> +
> 
> +  Status = gBS->LocateProtocol (&gEfiRngProtocolGuid, NULL, (VOID
> **)&RngProtocol);
> 
> +  if (EFI_ERROR (Status) || RngProtocol == NULL) {
> 
> +      DEBUG((DEBUG_ERROR, "%a: Could not locate RNG prototocol,
> Status = %r\n", __FUNCTION__, Status));
> 
> +      return Status;
> 
> +  }
> 
> +
> 
> +  Status = RngProtocol->GetRNG (RngProtocol,
> &gEfiRngAlgorithmSp80090Ctr256Guid, BufferSize, Buffer);
> 
> +  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm CTR-256 - Status = %r\n",
> __FUNCTION__, Status));
> 
> +  if (!EFI_ERROR (Status)) {
> 
> +    return Status;
> 
> +  }
> 
> +
> 
> +  Status = RngProtocol->GetRNG (RngProtocol,
> &gEfiRngAlgorithmSp80090Hmac256Guid, BufferSize, Buffer);
> 
> +  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm HMAC-256 - Status
> = %r\n", __FUNCTION__, Status));
> 
> +  if (!EFI_ERROR (Status)) {
> 
> +    return Status;
> 
> +  }
> 
> +
> 
> +  Status = RngProtocol->GetRNG (RngProtocol,
> &gEfiRngAlgorithmSp80090Hash256Guid, BufferSize, Buffer);
> 
> +  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm Hash-256 - Status = %r\n",
> __FUNCTION__, Status));
> 
> +  if (!EFI_ERROR (Status)) {
> 
> +    return Status;
> 
> +  }
> 
> +  // If all the other methods have failed, use the default method from
the
> RngProtocol
> 
> +  Status = RngProtocol->GetRNG (RngProtocol, NULL, BufferSize, Buffer);
> 
> +  DEBUG((DEBUG_INFO, "%a: GetRNG algorithm Hash-256 - Status = %r\n",
> __FUNCTION__, Status));
> 
> +  if (!EFI_ERROR (Status)) {
> 
> +    return Status;
> 
> +  }
> 
> +  // If we get to this point, we have failed
> 
> +  DEBUG((DEBUG_ERROR, "%a: GetRNG() failed, staus = %r\n",
> __FUNCTION__, Status));
> 
> +
> 
> +  return Status;
> 
> +}// GenerateRandomNumberViaNist800Algorithm()
> 
> +
> 
> +
> 
> +/**
> 
> +  Generates a 16-bit random number.
> 
> +
> 
> +  if Rand is NULL, return FALSE.
> 
> +
> 
> +  @param[out] Rand     Buffer pointer to store the 16-bit random value.
> 
> +
> 
> +  @retval TRUE         Random number generated successfully.
> 
> +  @retval FALSE        Failed to generate the random number.
> 
> +
> 
> +**/
> 
> +BOOLEAN
> 
> +EFIAPI
> 
> +GetRandomNumber16 (
> 
> +  OUT UINT16  *Rand
> 
> +  )
> 
> +{
> 
> +  EFI_STATUS Status;
> 
> +
> 
> +  if (Rand == NULL)
> 
> +  {
> 
> +    return FALSE;
> 
> +  }
> 
> +
> 
> +  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8 *)Rand,
> 2);

Here, how about use sizeof (UINT16) to replace hardcode 2? It will be
meaningful. 
The same comments are for the following 4, 8, 16. 16 is 2 * sizeof (UINT64).


Thanks
Liming
> 
> +  if (EFI_ERROR (Status)) {
> 
> +    return FALSE;
> 
> +  }
> 
> +  return TRUE;
> 
> +}
> 
> +
> 
> +/**
> 
> +  Generates a 32-bit random number.
> 
> +
> 
> +  if Rand is NULL, return FALSE.
> 
> +
> 
> +  @param[out] Rand     Buffer pointer to store the 32-bit random value.
> 
> +
> 
> +  @retval TRUE         Random number generated successfully.
> 
> +  @retval FALSE        Failed to generate the random number.
> 
> +
> 
> +**/
> 
> +BOOLEAN
> 
> +EFIAPI
> 
> +GetRandomNumber32 (
> 
> +  OUT UINT32 *Rand
> 
> +  )
> 
> +{
> 
> +  EFI_STATUS Status;
> 
> +
> 
> +  if (Rand == NULL) {
> 
> +    return FALSE;
> 
> +  }
> 
> +
> 
> +  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand,
> 4);
> 
> +  if (EFI_ERROR (Status)) {
> 
> +    return FALSE;
> 
> +  }
> 
> +  return TRUE;
> 
> +}
> 
> +
> 
> +/**
> 
> +  Generates a 64-bit random number.
> 
> +
> 
> +  if Rand is NULL, return FALSE.
> 
> +
> 
> +  @param[out] Rand     Buffer pointer to store the 64-bit random value.
> 
> +
> 
> +  @retval TRUE         Random number generated successfully.
> 
> +  @retval FALSE        Failed to generate the random number.
> 
> +
> 
> +**/
> 
> +BOOLEAN
> 
> +EFIAPI
> 
> +GetRandomNumber64 (
> 
> +  OUT UINT64 *Rand
> 
> +  )
> 
> +{
> 
> +  EFI_STATUS Status;
> 
> +
> 
> +  if (Rand == NULL) {
> 
> +    return FALSE;
> 
> +  }
> 
> +
> 
> +  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand,
> 8);
> 
> +  if (EFI_ERROR (Status)) {
> 
> +    return FALSE;
> 
> +  }
> 
> +  return TRUE;
> 
> +}
> 
> +
> 
> +/**
> 
> +  Generates a 128-bit random number.
> 
> +
> 
> +  if Rand is NULL, return FALSE.
> 
> +
> 
> +  @param[out] Rand     Buffer pointer to store the 128-bit random
> value.
> 
> +
> 
> +  @retval TRUE         Random number generated successfully.
> 
> +  @retval FALSE        Failed to generate the random number.
> 
> +
> 
> +**/
> 
> +BOOLEAN
> 
> +EFIAPI
> 
> +GetRandomNumber128 (
> 
> +  OUT UINT64 *Rand
> 
> +  )
> 
> +{
> 
> +  EFI_STATUS Status;
> 
> +
> 
> +  if (Rand == NULL) {
> 
> +    return FALSE;
> 
> +  }
> 
> +
> 
> +  Status = GenerateRandomNumberViaNist800Algorithm ((UINT8*)Rand,
> 16);
> 
> +  if (EFI_ERROR (Status)) {
> 
> +    return FALSE;
> 
> +  }
> 
> +  return TRUE;
> 
> +}
> 
> diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.inf
> b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
> new file mode 100644
> index 000000000000..68554ad21146
> --- /dev/null
> +++ b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
> @@ -0,0 +1,38 @@
> +# @file
> 
> +# Provides implementation of the library class RngLib that uses the
> RngProtocol
> 
> +#
> 
> +# @copyright
> 
> +# Copyright (c) Microsoft Corporation. All rights reserved.
> 
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +#
> 
> +##
> 
> +
> 
> +[Defines]
> 
> +  INF_VERSION     = 1.27
> 
> +  BASE_NAME       = DxeRngLib
> 
> +  MODULE_UNI_FILE = DxeRngLib.uni
> 
> +  FILE_GUID       = FF9F84C5-A33E-44E3-9BB5-0D654B2D4149
> 
> +  MODULE_TYPE     = DXE_DRIVER
> 
> +  VERSION_STRING  = 1.0
> 
> +  LIBRARY_CLASS   = RngLib|DXE_DRIVER UEFI_APPLICATION
> UEFI_DRIVER
> 
> +
> 
> +[Packages]
> 
> +  MdePkg/MdePkg.dec
> 
> +
> 
> +[Sources]
> 
> +  DxeRngLib.c
> 
> +
> 
> +[LibraryClasses]
> 
> +  DebugLib
> 
> +  UefiBootServicesTableLib
> 
> +
> 
> +[Protocols]
> 
> +  gEfiRngProtocolGuid                 ## CONSUMES
> 
> +
> 
> +[Depex]
> 
> +  gEfiRngProtocolGuid
> 
> +
> 
> +[Guids]
> 
> +  gEfiRngAlgorithmSp80090Ctr256Guid
> 
> +  gEfiRngAlgorithmSp80090Hash256Guid
> 
> +  gEfiRngAlgorithmSp80090Hmac256Guid
> 
> diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.uni
> b/MdePkg/Library/DxeRngLib/DxeRngLib.uni
> new file mode 100644
> index 000000000000..c904e54b6fb0
> --- /dev/null
> +++ b/MdePkg/Library/DxeRngLib/DxeRngLib.uni
> @@ -0,0 +1,15 @@
> +// @file
> 
> +// Instance of RNG (Random Number Generator) Library.
> 
> +//
> 
> +// RngLib that uses the Rng Protocol to provide random numbers.
> 
> +//
> 
> +// Copyright (c) Microsoft Corporation.
> 
> +//
> 
> +// SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +//
> 
> +
> 
> +
> 
> +#string STR_MODULE_ABSTRACT     #language en-US "Instance of RNG
> Library"
> 
> +
> 
> +#string STR_MODULE_DESCRIPTION  #language en-US "BaseRng Library
> that uses the Rng Protocol to provide random numbers"
> 
> +
> 
> diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
> index d7ba3a730909..2c3b7966b086 100644
> --- a/MdePkg/MdePkg.dsc
> +++ b/MdePkg/MdePkg.dsc
> @@ -62,8 +62,10 @@
>    MdePkg/Library/BasePostCodeLibPort80/BasePostCodeLibPort80.inf
> 
>    MdePkg/Library/BasePrintLib/BasePrintLib.inf
> 
> 
> MdePkg/Library/BaseReportStatusCodeLibNull/BaseReportStatusCodeLibNull
> .inf
> 
> -  MdePkg/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf
> 
> +  MdePkg/Library/DxeRngLib/DxeRngLib.inf
> 
>    MdePkg/Library/BaseRngLibNull/BaseRngLibNull.inf
> 
> +  MdePkg/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf
> 
> +
> 
>    MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf
> 
>    MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> 
> 
> MdePkg/Library/BaseTimerLibNullTemplate/BaseTimerLibNullTemplate.inf
> 
> --
> 2.28.0.windows.1
> 
> 
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