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SecurityPkg/Tpm2CommandLib: add a new function 

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.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Qi Zhang <qi1.zhang@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Zhang, Qi 2020-07-28 16:20:39 +08:00 committed by mergify[bot]
parent ffde22468e
commit 1b0d659e6d
2 changed files with 56 additions and 0 deletions
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16
SecurityPkg/Include/Library/Tpm2CommandLib.h
View File

@ -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.

40
SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c
View File

@ -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.