diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibTcg2/Tpm2DeviceLibTcg2.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibTcg2/Tpm2DeviceLibTcg2.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibTcg2/Tpm2DeviceLibTcg2.c b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibTcg2/Tpm2DeviceLibTcg2.c new file mode 100644 index 00000000..dc7ce816 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibTcg2/Tpm2DeviceLibTcg2.c @@ -0,0 +1,119 @@ +/** @file + This library is TPM2 TCG2 protocol lib. + +Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <Library/BaseLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/DebugLib.h> +#include <Library/UefiBootServicesTableLib.h> +#include <Library/Tpm2DeviceLib.h> +#include <Protocol/Tcg2Protocol.h> +#include <IndustryStandard/Tpm20.h> + +EFI_TCG2_PROTOCOL *mTcg2Protocol = NULL; + +/** + This service enables the sending of commands to the TPM2. + + @param[in] InputParameterBlockSize Size of the TPM2 input parameter block. + @param[in] InputParameterBlock Pointer to the TPM2 input parameter block. + @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block. + @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block. + + @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received. + @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device. + @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small. +**/ +EFI_STATUS +EFIAPI +Tpm2SubmitCommand ( + IN UINT32 InputParameterBlockSize, + IN UINT8 *InputParameterBlock, + IN OUT UINT32 *OutputParameterBlockSize, + IN UINT8 *OutputParameterBlock + ) +{ + EFI_STATUS Status; + TPM2_RESPONSE_HEADER *Header; + + if (mTcg2Protocol == NULL) { + Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol); + if (EFI_ERROR (Status)) { + // + // Tcg2 protocol is not installed. So, TPM2 is not present. + // + DEBUG ((EFI_D_ERROR, "Tpm2SubmitCommand - Tcg2 - %r\n", Status)); + return EFI_NOT_FOUND; + } + } + // + // Assume when Tcg2 Protocol is ready, RequestUseTpm already done. + // + Status = mTcg2Protocol->SubmitCommand ( + mTcg2Protocol, + InputParameterBlockSize, + InputParameterBlock, + *OutputParameterBlockSize, + OutputParameterBlock + ); + if (EFI_ERROR (Status)) { + return Status; + } + Header = (TPM2_RESPONSE_HEADER *)OutputParameterBlock; + *OutputParameterBlockSize = SwapBytes32 (Header->paramSize); + + return EFI_SUCCESS; +} + +/** + This service requests use TPM2. + + @retval EFI_SUCCESS Get the control of TPM2 chip. + @retval EFI_NOT_FOUND TPM2 not found. + @retval EFI_DEVICE_ERROR Unexpected device behavior. +**/ +EFI_STATUS +EFIAPI +Tpm2RequestUseTpm ( + VOID + ) +{ + EFI_STATUS Status; + + if (mTcg2Protocol == NULL) { + Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol); + if (EFI_ERROR (Status)) { + // + // Tcg2 protocol is not installed. So, TPM2 is not present. + // + DEBUG ((EFI_D_ERROR, "Tpm2RequestUseTpm - Tcg2 - %r\n", Status)); + return EFI_NOT_FOUND; + } + } + // + // Assume when Tcg2 Protocol is ready, RequestUseTpm already done. + // + return EFI_SUCCESS; +} + +/** + This service register TPM2 device. + + @param Tpm2Device TPM2 device + + @retval EFI_SUCCESS This TPM2 device is registered successfully. + @retval EFI_UNSUPPORTED System does not support register this TPM2 device. + @retval EFI_ALREADY_STARTED System already register this TPM2 device. +**/ +EFI_STATUS +EFIAPI +Tpm2RegisterTpm2DeviceLib ( + IN TPM2_DEVICE_INTERFACE *Tpm2Device + ) +{ + return EFI_UNSUPPORTED; +} |