diff options
| author | Pierre Gondois <pierre.gondois@arm.com> | 2023-08-11 16:33:08 +0200 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-09-08 09:48:55 +0000 |
| commit | 5443c2dc310d2c8eb15fb8eefd5057342e78cd0d (patch) | |
| tree | d3ebde5ec7e19c6ab8e82712ff67db8a9530ac08 /MdePkg/Library/BaseRngLib/Rand/RdRand.c | |
| parent | 414c0f20896f3dec412135fa4260f8aad8bef246 (diff) | |
| download | edk2-5443c2dc310d2c8eb15fb8eefd5057342e78cd0d.tar.gz edk2-5443c2dc310d2c8eb15fb8eefd5057342e78cd0d.tar.bz2 edk2-5443c2dc310d2c8eb15fb8eefd5057342e78cd0d.zip | |
MdePkg/Rng: Add GetRngGuid() to RngLib
The EFI_RNG_PROTOCOL can use the RngLib. The RngLib has multiple
implementations, some of them are unsafe (e.g. BaseRngLibTimerLib).
To allow the RngDxe to detect when such implementation is used,
add a GetRngGuid() function to the RngLib.
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Kun Qin <kun.qin@microsoft.com>
Diffstat (limited to 'MdePkg/Library/BaseRngLib/Rand/RdRand.c')
| -rw-r--r-- | MdePkg/Library/BaseRngLib/Rand/RdRand.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseRngLib/Rand/RdRand.c b/MdePkg/Library/BaseRngLib/Rand/RdRand.c index 070d41e255..9bd68352f9 100644 --- a/MdePkg/Library/BaseRngLib/Rand/RdRand.c +++ b/MdePkg/Library/BaseRngLib/Rand/RdRand.c @@ -2,6 +2,7 @@ Random number generator services that uses RdRand instruction access
to provide high-quality random numbers.
+Copyright (c) 2023, Arm Limited. All rights reserved.<BR>
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
@@ -11,6 +12,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Uefi.h>
#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include "BaseRngLibInternals.h"
@@ -128,3 +130,27 @@ ArchIsRngSupported ( */
return TRUE;
}
+
+/**
+ Get a GUID identifying the RNG algorithm implementation.
+
+ @param [out] RngGuid If success, contains the GUID identifying
+ the RNG algorithm implementation.
+
+ @retval EFI_SUCCESS Success.
+ @retval EFI_UNSUPPORTED Not supported.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+**/
+EFI_STATUS
+EFIAPI
+GetRngGuid (
+ GUID *RngGuid
+ )
+{
+ if (RngGuid == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ CopyMem (RngGuid, &gEfiRngAlgorithmSp80090Ctr256Guid, sizeof (*RngGuid));
+ return EFI_SUCCESS;
+}
|