回复: [edk2-devel] [PATCH v1 0/8] SecurityPkg/MdePkg: RngLib GUID

["gaoliming" <gaoliming@byosoft.com.cn>]

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@arm.com>
> 发送时间: 2023年6月23日 17:02
> 收件人: devel@edk2.groups.io
> 抄送: Michael D Kinney <michael.d.kinney@intel.com>; Liming Gao
> <gaoliming@byosoft.com.cn>; Zhiguang Liu <zhiguang.liu@intel.com>; Jiewen
> Yao <jiewen.yao@intel.com>; Jian J Wang <jian.j.wang@intel.com>; Ard
> Biesheuvel <ardb+tianocore@kernel.org>; Sami Mujawar
> <sami.mujawar@arm.com>; Jose Marinho <Jose.Marinho@arm.com>; Samer
> El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@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@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(-)
> >