SecurityPkg/TPM2: Extract GetSupportedAndActivePcrs to Tpm2CommandLib

This patch extracts function Tpm2GetCapabilitySupportedAndActivePcrs()
from drivers and also update Tcg2ExecutePhysicalPresence() to call
Tpm2GetCapabilitySupportedAndActivePcrs() instead of
Tcg2Protocol->GetCapability to query the TPM to determine which
hashing algorithms are supported.

Cc: Chao B Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/SecurityPkg/Include/Library/Tpm2CommandLib.h b/SecurityPkg/Include/Library/Tpm2CommandLib.h
index 825ffc37a4..9a1dd8d8ac 100644
--- a/SecurityPkg/Include/Library/Tpm2CommandLib.h
+++ b/SecurityPkg/Include/Library/Tpm2CommandLib.h
@@ -763,6 +763,24 @@ Tpm2GetCapabilityPcrs (
   );

 

 /**

+  This function will query the TPM to determine which hashing algorithms

+  are supported and which PCR banks are currently active.

+

+  @param[out]  TpmHashAlgorithmBitmap A bitmask containing the algorithms supported by the TPM.

+  @param[out]  ActivePcrBanks         A bitmask containing the PCRs currently allocated.

+

+  @retval     EFI_SUCCESS   TPM was successfully queried and return values can be trusted.

+  @retval     Others        An error occurred, likely in communication with the TPM.

+

+**/

+EFI_STATUS

+EFIAPI

+Tpm2GetCapabilitySupportedAndActivePcrs(

+  OUT UINT32                            *TpmHashAlgorithmBitmap,

+  OUT UINT32                            *ActivePcrBanks

+  );

+

+/**

   This command returns the information of TPM AlgorithmSet.

 

   This function parse the value got from TPM2_GetCapability and return the AlgorithmSet.