From: "Zhang, Qi" <qi1.zh...@intel.com> Tpm2GetCapabilityIsCommandImplemented
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2793 check if the commad is supported by comparing the command code with command index. Cc: Jiewen Yao <jiewen....@intel.com> Cc: Jian J Wang <jian.j.w...@intel.com> Cc: Chao Zhang <chao.b.zh...@intel.com> Cc: Rahul Kumar <rahul1.ku...@intel.com> Signed-off-by: Qi Zhang <qi1.zh...@intel.com> --- SecurityPkg/Include/Library/Tpm2CommandLib.h | 16 ++++++++ .../Library/Tpm2CommandLib/Tpm2Capability.c | 40 +++++++++++++++++++ 2 files changed, 56 insertions(+) diff --git a/SecurityPkg/Include/Library/Tpm2CommandLib.h b/SecurityPkg/Include/Library/Tpm2CommandLib.h index ce381e786b..ee8eb62295 100644 --- a/SecurityPkg/Include/Library/Tpm2CommandLib.h +++ b/SecurityPkg/Include/Library/Tpm2CommandLib.h @@ -790,6 +790,22 @@ Tpm2GetCapabilityAlgorithmSet ( OUT UINT32 *AlgorithmSet ); +/** + This function will query if the command is supported. + + @param[In] Command TPM_CC command starts from TPM_CC_FIRST. + @param[out] IsCmdImpl The command is supported or not. + + @retval EFI_SUCCESS Operation completed successfully. + @retval EFI_DEVICE_ERROR The command was unsuccessful. +**/ +EFI_STATUS +EFIAPI +Tpm2GetCapabilityIsCommandImplemented ( + IN TPM_CC Command, + OUT BOOLEAN *IsCmdImpl + ); + /** This command is used to check to see if specific combinations of algorithm parameters are supported. diff --git a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c index 85b11c7715..17c0c3a151 100644 --- a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c +++ b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c @@ -39,6 +39,8 @@ typedef struct { #pragma pack() +#define TPMA_CC_COMMANDINDEX_MASK 0x2000FFFF + /** This command returns various information regarding the TPM and its current state. @@ -628,6 +630,44 @@ Tpm2GetCapabilityAlgorithmSet ( return EFI_SUCCESS; } +/** + This function will query if the command is supported. + + @param[In] Command TPM_CC command starts from TPM_CC_FIRST. + @param[out] IsCmdImpl The command is supported or not. + + @retval EFI_SUCCESS Operation completed successfully. + @retval EFI_DEVICE_ERROR The command was unsuccessful. +**/ +EFI_STATUS +EFIAPI +Tpm2GetCapabilityIsCommandImplemented ( + IN TPM_CC Command, + OUT BOOLEAN *IsCmdImpl + ) +{ + TPMS_CAPABILITY_DATA TpmCap; + TPMI_YES_NO MoreData; + EFI_STATUS Status; + UINT32 Attribute; + + Status = Tpm2GetCapability ( + TPM_CAP_COMMANDS, + Command, + 1, + &MoreData, + &TpmCap + ); + if (EFI_ERROR (Status)) { + return Status; + } + + CopyMem (&Attribute, &TpmCap.data.command.commandAttributes[0], sizeof (UINT32)); + *IsCmdImpl = (Command == (SwapBytes32(Attribute) & TPMA_CC_COMMANDINDEX_MASK)); + + return EFI_SUCCESS; +} + /** This command is used to check to see if specific combinations of algorithm parameters are supported. -- 2.26.2.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#63392): https://edk2.groups.io/g/devel/message/63392 Mute This Topic: https://groups.io/mt/75840053/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
