回复: [edk2-devel] [PATCH v1 0/8] SecurityPkg/MdePkg: RngLib GUID
gaoliming via groups.io
gaoliming=byosoft.com.cn at groups.io
Sun Jun 25 03:13:01 UTC 2023
Pierre:
This patch set moves PCD from gEfiSecurityPkgTokenSpaceGuid.PcdCpuRngSupportedAlgorithm to MdePkg. It may impact the platform those set this PCD in their DSC. Have you evaluated its impact?
Thanks
Liming
> -----邮件原件-----
> 发件人: Pierre Gondois <pierre.gondois at arm.com>
> 发送时间: 2023年6月23日 17:02
> 收件人: devel at edk2.groups.io
> 抄送: Michael D Kinney <michael.d.kinney at intel.com>; Liming Gao
> <gaoliming at byosoft.com.cn>; Zhiguang Liu <zhiguang.liu at intel.com>; Jiewen
> Yao <jiewen.yao at intel.com>; Jian J Wang <jian.j.wang at intel.com>; Ard
> Biesheuvel <ardb+tianocore at kernel.org>; Sami Mujawar
> <sami.mujawar at arm.com>; Jose Marinho <Jose.Marinho at arm.com>; Samer
> El-Haj-Mahmoud <Samer.El-Haj-Mahmoud at arm.com>
> 主题: Re: [edk2-devel] [PATCH v1 0/8] SecurityPkg/MdePkg: RngLib GUID
>
> Hello,
> Just a ping for the patch-set,
>
> Regards,
> Pierre
>
> On 5/9/23 09:40, PierreGondois via groups.io wrote:
> > From: Pierre Gondois <pierre.gondois at arm.com>
> >
> > This patchset follows the 'code first' approach and relies on [1].
> > This patchset follows the thread at [3] that aims to solve [2].
> > [1] and [2] are bound and this patchset aims to solve both.
> >
> > In this patchset:
> > a-
> > The RngDxe can rely on the RngLib. However the RngLib has no
> > interface allowing to describe which Rng algorithm is implemented.
> > The RngDxe must advertise the algorithm that are available through
> > the RngGetInfo() callback.
> > Add a GetRngGuid() for interface to the RngLib.
> >
> > b-
> > The Arm Architecture states the RNDR that the DRBG algorithm should
> > be compliant with NIST SP800-90A, while not mandating a particular
> > algorithm, so as to be inclusive of different geographies.
> > The RngLib can rely on this Arm RNDR instruction. In order to
> > accurately describe the implementation using the RNDR instruction,
> > add a EFI_RNG_ALGORITHM_ARM_RNDR GUID [1].
> >
> > c-
> > For the same reason as a/b, add a GUID describing unsafe RNG
> > algorithms, allowing to accurately describe the BaseRngLibTimerLib.
> >
> > d-
> > Use a/b/c mechanisms/GUIDs to select a safe Rng algorithm in the
> > Arm implementation of the RngDxe.
> >
> > [1] BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4441
> > [2] BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4151
> > [3] https://edk2.groups.io/g/devel/message/100806
> >
> > Pierre Gondois (8):
> > MdePkg/ArmTrngLib: Remove ASSERTs in Null implementation
> > MdePkg/MdePkg.dec: Move PcdCpuRngSupportedAlgorithm to MdePkg
> > MdePkg/DxeRngLib: Request raw algorithm instead of default
> > MdePkg/Rng: Add GUIDs to describe Rng algorithms
> > MdePkg/Rng: Add GetRngGuid() to RngLib
> > SecurityPkg/RngDxe: Use GetRngGuid() when probing RngLib
> > SecurityPkg/RngDxe: Select safe default Rng algorithm
> > SecurityPkg/RngDxe: Simplify Rng algorithm selection for Arm
> >
> > MdePkg/Include/Library/RngLib.h | 17 +++++
> > MdePkg/Include/Protocol/Rng.h | 20 ++++++
> > .../BaseArmTrngLibNull/BaseArmTrngLibNull.c | 4 --
> > MdePkg/Library/BaseRngLib/AArch64/Rndr.c | 42 +++++++++++
> > MdePkg/Library/BaseRngLib/BaseRngLib.inf | 9 +++
> > MdePkg/Library/BaseRngLib/Rand/RdRand.c | 26 +++++++
> > .../Library/BaseRngLibNull/BaseRngLibNull.c | 22 ++++++
> > .../BaseRngLibTimerLib/BaseRngLibTimerLib.inf | 3 +
> > .../Library/BaseRngLibTimerLib/RngLibTimer.c | 28 ++++++++
> > MdePkg/Library/DxeRngLib/DxeRngLib.c | 36 +++++++++-
> > MdePkg/MdePkg.dec | 7 ++
> > .../RngDxe/AArch64/AArch64Algo.c | 70
> +++++++++++++++----
> > .../RandomNumberGenerator/RngDxe/ArmRngDxe.c | 23 +++---
> > .../RandomNumberGenerator/RngDxe/RngDxe.inf | 5 +-
> > SecurityPkg/SecurityPkg.dec | 2 -
> > 15 files changed, 278 insertions(+), 36 deletions(-)
> >
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