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196 lines
8.7 KiB
C
196 lines
8.7 KiB
C
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/** @file
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TCG Service Protocol as defined in TCG_EFI_Protocol_1_22_Final
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See http://trustedcomputinggroup.org for the latest specification
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Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _TCG_SERVICE_PROTOCOL_H_
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#define _TCG_SERVICE_PROTOCOL_H_
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#include <IndustryStandard/UefiTcgPlatform.h>
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#define EFI_TCG_PROTOCOL_GUID \
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{0xf541796d, 0xa62e, 0x4954, { 0xa7, 0x75, 0x95, 0x84, 0xf6, 0x1b, 0x9c, 0xdd } }
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typedef struct _EFI_TCG_PROTOCOL EFI_TCG_PROTOCOL;
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typedef struct {
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UINT8 Major;
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UINT8 Minor;
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UINT8 RevMajor;
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UINT8 RevMinor;
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} TCG_VERSION;
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typedef struct _TCG_EFI_BOOT_SERVICE_CAPABILITY {
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UINT8 Size; /// Size of this structure.
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TCG_VERSION StructureVersion;
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TCG_VERSION ProtocolSpecVersion;
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UINT8 HashAlgorithmBitmap; /// Hash algorithms .
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/// This protocol is capable of : 01=SHA-1.
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BOOLEAN TPMPresentFlag; /// 00h = TPM not present.
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BOOLEAN TPMDeactivatedFlag; /// 01h = TPM currently deactivated.
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} TCG_EFI_BOOT_SERVICE_CAPABILITY;
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typedef UINT32 TCG_ALGORITHM_ID;
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/**
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This service provides EFI protocol capability information, state information
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about the TPM, and Event Log state information.
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@param This Indicates the calling context
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@param ProtocolCapability The callee allocates memory for a TCG_BOOT_SERVICE_CAPABILITY
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structure and fills in the fields with the EFI protocol
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capability information and the current TPM state information.
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@param TCGFeatureFlags This is a pointer to the feature flags. No feature
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flags are currently defined so this parameter
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MUST be set to 0. However, in the future,
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feature flags may be defined that, for example,
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enable hash algorithm agility.
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@param EventLogLocation This is a pointer to the address of the event log in memory.
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@param EventLogLastEntry If the Event Log contains more than one entry,
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this is a pointer to the address of the start of
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the last entry in the event log in memory.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_INVALID_PARAMETER ProtocolCapability does not match TCG capability.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_TCG_STATUS_CHECK)(
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IN EFI_TCG_PROTOCOL *This,
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OUT TCG_EFI_BOOT_SERVICE_CAPABILITY
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*ProtocolCapability,
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OUT UINT32 *TCGFeatureFlags,
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OUT EFI_PHYSICAL_ADDRESS *EventLogLocation,
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OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry
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);
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/**
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This service abstracts the capability to do a hash operation on a data buffer.
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@param This Indicates the calling context.
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@param HashData The pointer to the data buffer to be hashed.
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@param HashDataLen The length of the data buffer to be hashed.
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@param AlgorithmId Identification of the Algorithm to use for the hashing operation.
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@param HashedDataLen Resultant length of the hashed data.
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@param HashedDataResult Resultant buffer of the hashed data.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_INVALID_PARAMETER HashDataLen is NULL.
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@retval EFI_INVALID_PARAMETER HashDataLenResult is NULL.
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@retval EFI_OUT_OF_RESOURCES Cannot allocate buffer of size *HashedDataLen.
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@retval EFI_UNSUPPORTED AlgorithmId not supported.
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@retval EFI_BUFFER_TOO_SMALL *HashedDataLen < sizeof (TCG_DIGEST).
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_TCG_HASH_ALL)(
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IN EFI_TCG_PROTOCOL *This,
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IN UINT8 *HashData,
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IN UINT64 HashDataLen,
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IN TCG_ALGORITHM_ID AlgorithmId,
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IN OUT UINT64 *HashedDataLen,
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IN OUT UINT8 **HashedDataResult
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);
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/**
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This service abstracts the capability to add an entry to the Event Log.
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@param This Indicates the calling context
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@param TCGLogData The pointer to the start of the data buffer containing
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the TCG_PCR_EVENT data structure. All fields in
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this structure are properly filled by the caller.
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@param EventNumber The event number of the event just logged.
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@param Flags Indicates additional flags. Only one flag has been
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defined at this time, which is 0x01 and means the
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extend operation should not be performed. All
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other bits are reserved.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_OUT_OF_RESOURCES Insufficient memory in the event log to complete this action.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_TCG_LOG_EVENT)(
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IN EFI_TCG_PROTOCOL *This,
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IN TCG_PCR_EVENT *TCGLogData,
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IN OUT UINT32 *EventNumber,
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IN UINT32 Flags
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);
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/**
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This service is a proxy for commands to the TPM.
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@param This Indicates the calling context.
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@param TpmInputParameterBlockSize Size of the TPM input parameter block.
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@param TpmInputParameterBlock The pointer to the TPM input parameter block.
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@param TpmOutputParameterBlockSize Size of the TPM output parameter block.
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@param TpmOutputParameterBlock The pointer to the TPM output parameter block.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_INVALID_PARAMETER Invalid ordinal.
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@retval EFI_UNSUPPORTED Current Task Priority Level >= EFI_TPL_CALLBACK.
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@retval EFI_TIMEOUT The TIS timed-out.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_TCG_PASS_THROUGH_TO_TPM)(
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IN EFI_TCG_PROTOCOL *This,
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IN UINT32 TpmInputParameterBlockSize,
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IN UINT8 *TpmInputParameterBlock,
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IN UINT32 TpmOutputParameterBlockSize,
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IN UINT8 *TpmOutputParameterBlock
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);
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/**
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This service abstracts the capability to do a hash operation on a data buffer, extend a specific TPM PCR with the hash result, and add an entry to the Event Log
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@param This Indicates the calling context
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@param HashData The physical address of the start of the data buffer
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to be hashed, extended, and logged.
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@param HashDataLen The length, in bytes, of the buffer referenced by HashData
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@param AlgorithmId Identification of the Algorithm to use for the hashing operation
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@param TCGLogData The physical address of the start of the data
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buffer containing the TCG_PCR_EVENT data structure.
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@param EventNumber The event number of the event just logged.
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@param EventLogLastEntry The physical address of the first byte of the entry
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just placed in the Event Log. If the Event Log was
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empty when this function was called then this physical
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address will be the same as the physical address of
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the start of the Event Log.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_UNSUPPORTED AlgorithmId != TPM_ALG_SHA.
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@retval EFI_UNSUPPORTED Current TPL >= EFI_TPL_CALLBACK.
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@retval EFI_DEVICE_ERROR The command was unsuccessful.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_TCG_HASH_LOG_EXTEND_EVENT)(
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IN EFI_TCG_PROTOCOL *This,
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IN EFI_PHYSICAL_ADDRESS HashData,
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IN UINT64 HashDataLen,
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IN TCG_ALGORITHM_ID AlgorithmId,
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IN OUT TCG_PCR_EVENT *TCGLogData,
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IN OUT UINT32 *EventNumber,
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OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry
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);
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///
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/// The EFI_TCG Protocol abstracts TCG activity.
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///
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struct _EFI_TCG_PROTOCOL {
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EFI_TCG_STATUS_CHECK StatusCheck;
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EFI_TCG_HASH_ALL HashAll;
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EFI_TCG_LOG_EVENT LogEvent;
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EFI_TCG_PASS_THROUGH_TO_TPM PassThroughToTpm;
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EFI_TCG_HASH_LOG_EXTEND_EVENT HashLogExtendEvent;
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};
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extern EFI_GUID gEfiTcgProtocolGuid;
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#endif
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