diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/Library/DxeTcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLibNull.c')
| -rw-r--r-- | Vlv2TbltDevicePkg/Library/DxeTcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLibNull.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/Vlv2TbltDevicePkg/Library/DxeTcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLibNull.c b/Vlv2TbltDevicePkg/Library/DxeTcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLibNull.c new file mode 100644 index 0000000000..96fad05527 --- /dev/null +++ b/Vlv2TbltDevicePkg/Library/DxeTcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLibNull.c @@ -0,0 +1,242 @@ +/** @file
+ Execute pending TPM2 requests from OS or BIOS.
+
+ Caution: This module requires additional review when modified.
+ This driver will have external input - variable.
+ This external input must be validated carefully to avoid security issue.
+
+ Tcg2ExecutePendingTpmRequest() will receive untrusted input and do validation.
+
+Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiDxe.h>
+
+#include <Protocol/Tcg2Protocol.h>
+#include <Protocol/VariableLock.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PrintLib.h>
+#include <Library/HiiLib.h>
+#include <Guid/EventGroup.h>
+#include <Guid/Tcg2PhysicalPresenceData.h>
+#include <Library/Tpm2CommandLib.h>
+#include <Library/Tcg2PpVendorLib.h>
+
+
+/**
+ Get string by string id from HII Interface.
+
+ @param[in] Id String ID.
+
+ @retval CHAR16 * String from ID.
+ @retval NULL If error occurs.
+
+**/
+CHAR16 *
+Tcg2PhysicalPresenceGetStringById (
+ IN EFI_STRING_ID Id
+ )
+{
+ return NULL;
+}
+
+/**
+ Send ClearControl and Clear command to TPM.
+
+ @param[in] PlatformAuth platform auth value. NULL means no platform auth change.
+
+ @retval EFI_SUCCESS Operation completed successfully.
+ @retval EFI_TIMEOUT The register can't run into the expected status in time.
+ @retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
+ @retval EFI_DEVICE_ERROR Unexpected device behavior.
+
+**/
+EFI_STATUS
+EFIAPI
+TpmCommandClear (
+ IN TPM2B_AUTH *PlatformAuth OPTIONAL
+ )
+{
+ return EFI_SUCCESS;
+}
+
+/**
+ Execute physical presence operation requested by the OS.
+
+ @param[in] PlatformAuth platform auth value. NULL means no platform auth change.
+ @param[in] CommandCode Physical presence operation value.
+ @param[in, out] PpiFlags The physical presence interface flags.
+
+ @retval TREE_PP_OPERATION_RESPONSE_BIOS_FAILURE Unknown physical presence operation.
+ @retval TREE_PP_OPERATION_RESPONSE_BIOS_FAILURE Error occurred during sending command to TPM or
+ receiving response from TPM.
+ @retval Others Return code from the TPM device after command execution.
+**/
+UINT32
+Tcg2ExecutePhysicalPresence (
+ IN TPM2B_AUTH *PlatformAuth, OPTIONAL
+ IN UINT32 CommandCode,
+ IN OUT EFI_TREE_PHYSICAL_PRESENCE_FLAGS *PpiFlags
+ )
+{
+ return 0;
+}
+
+
+/**
+ Read the specified key for user confirmation.
+
+ @param[in] CautionKey If true, F12 is used as confirm key;
+ If false, F10 is used as confirm key.
+
+ @retval TRUE User confirmed the changes by input.
+ @retval FALSE User discarded the changes.
+**/
+BOOLEAN
+Tcg2ReadUserKey (
+ IN BOOLEAN CautionKey
+ )
+{
+ return FALSE;
+}
+
+/**
+ The constructor function register UNI strings into imageHandle.
+
+ It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor successfully added string package.
+ @retval Other value The constructor can't add string package.
+**/
+EFI_STATUS
+EFIAPI
+Tcg2PhysicalPresenceLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return EFI_SUCCESS;
+}
+
+/**
+ Display the confirm text and get user confirmation.
+
+ @param[in] TpmPpCommand The requested TPM physical presence command.
+
+ @retval TRUE The user has confirmed the changes.
+ @retval FALSE The user doesn't confirm the changes.
+**/
+BOOLEAN
+Tcg2UserConfirm (
+ IN UINT32 TpmPpCommand
+ )
+{
+ return FALSE;
+}
+
+/**
+ Check if there is a valid physical presence command request. Also updates parameter value
+ to whether the requested physical presence command already confirmed by user
+
+ @param[in] TcgPpData EFI Tcg2 Physical Presence request data.
+ @param[in] Flags The physical presence interface flags.
+ @param[out] RequestConfirmed If the physical presence operation command required user confirm from UI.
+ True, it indicates the command doesn't require user confirm, or already confirmed
+ in last boot cycle by user.
+ False, it indicates the command need user confirm from UI.
+
+ @retval TRUE Physical Presence operation command is valid.
+ @retval FALSE Physical Presence operation command is invalid.
+
+**/
+BOOLEAN
+Tcg2HaveValidTpmRequest (
+ IN EFI_TREE_PHYSICAL_PRESENCE *TcgPpData,
+ IN EFI_TREE_PHYSICAL_PRESENCE_FLAGS Flags,
+ OUT BOOLEAN *RequestConfirmed
+ )
+{
+ return TRUE;
+}
+
+
+/**
+ Check and execute the requested physical presence command.
+
+ Caution: This function may receive untrusted input.
+ TcgPpData variable is external input, so this function will validate
+ its data structure to be valid value.
+
+ @param[in] PlatformAuth platform auth value. NULL means no platform auth change.
+ @param[in] TcgPpData Point to the physical presence NV variable.
+ @param[in] Flags The physical presence interface flags.
+**/
+VOID
+Tcg2ExecutePendingTpmRequest (
+ IN TPM2B_AUTH *PlatformAuth, OPTIONAL
+ IN EFI_TREE_PHYSICAL_PRESENCE *TcgPpData,
+ IN EFI_TREE_PHYSICAL_PRESENCE_FLAGS Flags
+ )
+{
+ return;
+}
+
+/**
+ Check and execute the pending TPM request.
+
+ The TPM request may come from OS or BIOS. This API will display request information and wait
+ for user confirmation if TPM request exists. The TPM request will be sent to TPM device after
+ the TPM request is confirmed, and one or more reset may be required to make TPM request to
+ take effect.
+
+ This API should be invoked after console in and console out are all ready as they are required
+ to display request information and get user input to confirm the request.
+
+ @param[in] PlatformAuth platform auth value. NULL means no platform auth change.
+**/
+VOID
+EFIAPI
+Tcg2PhysicalPresenceLibProcessRequest (
+ IN TPM2B_AUTH *PlatformAuth OPTIONAL
+ )
+{
+ return;
+}
+
+/**
+ Check if the pending TPM request needs user input to confirm.
+
+ The TPM request may come from OS. This API will check if TPM request exists and need user
+ input to confirmation.
+
+ @retval TRUE TPM needs input to confirm user physical presence.
+ @retval FALSE TPM doesn't need input to confirm user physical presence.
+
+**/
+BOOLEAN
+EFIAPI
+Tcg2PhysicalPresenceLibNeedUserConfirm(
+ VOID
+ )
+{
+
+ return FALSE;
+}
+
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