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| author | Pierre Gondois <pierre.gondois@arm.com> | 2023-08-11 16:33:07 +0200 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-09-08 09:48:55 +0000 |
| commit | 414c0f20896f3dec412135fa4260f8aad8bef246 (patch) | |
| tree | ee674106597689bde7923bea7170a9e00b8e1a3f | |
| parent | cf07238e5fa4f8b1138ac1c9e80530b4d4e59f1c (diff) | |
| download | edk2-414c0f20896f3dec412135fa4260f8aad8bef246.tar.gz edk2-414c0f20896f3dec412135fa4260f8aad8bef246.tar.bz2 edk2-414c0f20896f3dec412135fa4260f8aad8bef246.zip | |
MdeModulePkg/Rng: Add GUID to describe unsafe Rng algorithms
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4441
The EFI_RNG_PROTOCOL can rely on 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,
a GetRngGuid() function is added in a following patch.
Prepare GetRngGuid() return values and add a gEdkiiRngAlgorithmUnSafe
to describe an unsafe implementation, cf. the BaseRngLibTimerLib.
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Kun Qin <kun.qin@microsoft.com>
| -rw-r--r-- | MdeModulePkg/Include/Guid/RngAlgorithm.h | 23 | ||||
| -rw-r--r-- | MdeModulePkg/MdeModulePkg.dec | 3 |
2 files changed, 26 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/RngAlgorithm.h b/MdeModulePkg/Include/Guid/RngAlgorithm.h new file mode 100644 index 0000000000..e2ac2ba3e5 --- /dev/null +++ b/MdeModulePkg/Include/Guid/RngAlgorithm.h @@ -0,0 +1,23 @@ +/** @file
+ Rng Algorithm
+
+ Copyright (c) 2023, Arm Limited. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef RNG_ALGORITHM_GUID_H_
+#define RNG_ALGORITHM_GUID_H_
+
+///
+/// The implementation of a Random Number Generator might be unsafe, when using
+/// a dummy implementation for instance. Allow identifying such implementation
+/// with this GUID.
+///
+#define EDKII_RNG_ALGORITHM_UNSAFE \
+ { \
+ 0x869f728c, 0x409d, 0x4ab4, {0xac, 0x03, 0x71, 0xd3, 0x09, 0xc1, 0xb3, 0xf4 } \
+ }
+
+extern EFI_GUID gEdkiiRngAlgorithmUnSafe;
+
+#endif // #ifndef RNG_ALGORITHM_GUID_H_
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec index 0ff058b0a9..dd182c02fd 100644 --- a/MdeModulePkg/MdeModulePkg.dec +++ b/MdeModulePkg/MdeModulePkg.dec @@ -418,6 +418,9 @@ ## Include/Guid/MigratedFvInfo.h
gEdkiiMigratedFvInfoGuid = { 0xc1ab12f7, 0x74aa, 0x408d, { 0xa2, 0xf4, 0xc6, 0xce, 0xfd, 0x17, 0x98, 0x71 } }
+ ## Include/Guid/RngAlgorithm.h
+ gEdkiiRngAlgorithmUnSafe = { 0x869f728c, 0x409d, 0x4ab4, {0xac, 0x03, 0x71, 0xd3, 0x09, 0xc1, 0xb3, 0xf4 }}
+
#
# GUID defined in UniversalPayload
#
|