[edk2-devel] [PATCH v8 02/11] SecurityPkg: Create library for enrolling Secure Boot variables.
Grzegorz Bernacki
gjb at semihalf.com
Mon Aug 2 10:46:24 UTC 2021
This commits add library, which consist functions to
enrolll Secure Boot keys and initialize Secure Boot
default variables. Some of the functions was moved
from SecureBootConfigImpl.c file.
Signed-off-by: Grzegorz Bernacki <gjb at semihalf.com>
Reviewed-by: Sunny Wang <sunny.wang at arm.com>
Reviewed-by: Jiewen Yao <Jiewen.yao at intel.com>
---
SecurityPkg/SecurityPkg.dec | 4 +
SecurityPkg/SecurityPkg.dsc | 1 +
SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf | 80 ++++
SecurityPkg/Include/Library/SecureBootVariableProvisionLib.h | 134 ++++++
SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.c | 482 ++++++++++++++++++++
SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.uni | 16 +
6 files changed, 717 insertions(+)
create mode 100644 SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf
create mode 100644 SecurityPkg/Include/Library/SecureBootVariableProvisionLib.h
create mode 100644 SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.c
create mode 100644 SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.uni
diff --git a/SecurityPkg/SecurityPkg.dec b/SecurityPkg/SecurityPkg.dec
index 8f3710e59f..e30c39f321 100644
--- a/SecurityPkg/SecurityPkg.dec
+++ b/SecurityPkg/SecurityPkg.dec
@@ -91,6 +91,10 @@
## @libraryclass Provides helper functions related to creation/removal Secure Boot variables.
#
SecureBootVariableLib|Include/Library/SecureBootVariableLib.h
+
+ ## @libraryclass Provides support to enroll Secure Boot keys.
+ #
+ SecureBootVariableProvisionLib|Include/Library/SecureBootVariableProvisionLib.h
[Guids]
## Security package token space guid.
# Include/Guid/SecurityPkgTokenSpace.h
diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
index 854f250625..99c227dad2 100644
--- a/SecurityPkg/SecurityPkg.dsc
+++ b/SecurityPkg/SecurityPkg.dsc
@@ -71,6 +71,7 @@
TcgEventLogRecordLib|SecurityPkg/Library/TcgEventLogRecordLib/TcgEventLogRecordLib.inf
MmUnblockMemoryLib|MdePkg/Library/MmUnblockMemoryLib/MmUnblockMemoryLibNull.inf
SecureBootVariableLib|SecurityPkg/Library/SecureBootVariableLib/SecureBootVariableLib.inf
+ SecureBootVariableProvisionLib|SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf
[LibraryClasses.ARM]
#
diff --git a/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf
new file mode 100644
index 0000000000..a09abd29ce
--- /dev/null
+++ b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf
@@ -0,0 +1,80 @@
+## @file
+# Provides initialization of Secure Boot keys and databases.
+#
+# Copyright (c) 2021, ARM Ltd. All rights reserved.<BR>
+# Copyright (c) 2021, Semihalf All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = SecureBootVariableLib
+ MODULE_UNI_FILE = SecureBootVariableLib.uni
+ FILE_GUID = 18192DD0-9430-45F1-80C7-5C52061CD183
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SecureBootVariableProvisionLib|DXE_DRIVER DXE_RUNTIME_DRIVER UEFI_APPLICATION
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 AARCH64
+#
+
+[Sources]
+ SecureBootVariableProvisionLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ SecurityPkg/SecurityPkg.dec
+ CryptoPkg/CryptoPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ MemoryAllocationLib
+ BaseCryptLib
+ DxeServicesLib
+ SecureBootVariableLib
+
+[Guids]
+ ## CONSUMES ## Variable:L"SetupMode"
+ ## PRODUCES ## Variable:L"SetupMode"
+ ## CONSUMES ## Variable:L"SecureBoot"
+ ## PRODUCES ## Variable:L"SecureBoot"
+ ## PRODUCES ## Variable:L"PK"
+ ## PRODUCES ## Variable:L"KEK"
+ ## CONSUMES ## Variable:L"PKDefault"
+ ## CONSUMES ## Variable:L"KEKDefault"
+ ## CONSUMES ## Variable:L"dbDefault"
+ ## CONSUMES ## Variable:L"dbxDefault"
+ ## CONSUMES ## Variable:L"dbtDefault"
+ gEfiGlobalVariableGuid
+
+ ## SOMETIMES_CONSUMES ## Variable:L"DB"
+ ## SOMETIMES_CONSUMES ## Variable:L"DBX"
+ ## SOMETIMES_CONSUMES ## Variable:L"DBT"
+ gEfiImageSecurityDatabaseGuid
+
+ ## CONSUMES ## Variable:L"SecureBootEnable"
+ ## PRODUCES ## Variable:L"SecureBootEnable"
+ gEfiSecureBootEnableDisableGuid
+
+ ## CONSUMES ## Variable:L"CustomMode"
+ ## PRODUCES ## Variable:L"CustomMode"
+ gEfiCustomModeEnableGuid
+
+ gEfiCertTypeRsa2048Sha256Guid ## CONSUMES
+ gEfiCertX509Guid ## CONSUMES
+ gEfiCertPkcs7Guid ## CONSUMES
+
+ gDefaultPKFileGuid
+ gDefaultKEKFileGuid
+ gDefaultdbFileGuid
+ gDefaultdbxFileGuid
+ gDefaultdbtFileGuid
+
diff --git a/SecurityPkg/Include/Library/SecureBootVariableProvisionLib.h b/SecurityPkg/Include/Library/SecureBootVariableProvisionLib.h
new file mode 100644
index 0000000000..ba8009b5cd
--- /dev/null
+++ b/SecurityPkg/Include/Library/SecureBootVariableProvisionLib.h
@@ -0,0 +1,134 @@
+/** @file
+ Provides a functions to enroll keys based on default values.
+
+Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2018 Hewlett Packard Enterprise Development LP<BR>
+Copyright (c) 2021, ARM Ltd. All rights reserved.<BR>
+Copyright (c) 2021, Semihalf All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef SECURE_BOOT_VARIABLE_PROVISION_LIB_H_
+#define SECURE_BOOT_VARIABLE_PROVISION_LIB_H_
+
+/**
+ Sets the content of the 'db' variable based on 'dbDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2(), GetTime() and SetVariable()
+--*/
+EFI_STATUS
+EFIAPI
+EnrollDbFromDefault (
+ VOID
+);
+
+/**
+ Sets the content of the 'dbx' variable based on 'dbxDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2(), GetTime() and SetVariable()
+--*/
+EFI_STATUS
+EFIAPI
+EnrollDbxFromDefault (
+ VOID
+);
+
+/**
+ Sets the content of the 'dbt' variable based on 'dbtDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2(), GetTime() and SetVariable()
+--*/
+EFI_STATUS
+EFIAPI
+EnrollDbtFromDefault (
+ VOID
+);
+
+/**
+ Sets the content of the 'KEK' variable based on 'KEKDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2(), GetTime() and SetVariable()
+--*/
+EFI_STATUS
+EFIAPI
+EnrollKEKFromDefault (
+ VOID
+);
+
+/**
+ Sets the content of the 'PK' variable based on 'PKDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2(), GetTime() and SetVariable()
+--*/
+EFI_STATUS
+EFIAPI
+EnrollPKFromDefault (
+ VOID
+);
+
+/**
+ Initializes PKDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+--*/
+EFI_STATUS
+SecureBootInitPKDefault (
+ IN VOID
+ );
+
+/**
+ Initializes KEKDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+--*/
+EFI_STATUS
+SecureBootInitKEKDefault (
+ IN VOID
+ );
+
+/**
+ Initializes dbDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+--*/
+EFI_STATUS
+SecureBootInitDbDefault (
+ IN VOID
+ );
+
+/**
+ Initializes dbtDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+--*/
+EFI_STATUS
+SecureBootInitDbtDefault (
+ IN VOID
+ );
+
+/**
+ Initializes dbxDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+--*/
+EFI_STATUS
+SecureBootInitDbxDefault (
+ IN VOID
+ );
+#endif
diff --git a/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.c b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.c
new file mode 100644
index 0000000000..848f7ce929
--- /dev/null
+++ b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.c
@@ -0,0 +1,482 @@
+/** @file
+ This library provides functions to set/clear Secure Boot
+ keys and databases.
+
+ Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+ (C) Copyright 2018 Hewlett Packard Enterprise Development LP<BR>
+ Copyright (c) 2021, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2021, Semihalf All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#include <Guid/GlobalVariable.h>
+#include <Guid/AuthenticatedVariableFormat.h>
+#include <Guid/ImageAuthentication.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/SecureBootVariableLib.h>
+#include <Library/SecureBootVariableProvisionLib.h>
+
+/**
+ Enroll a key/certificate based on a default variable.
+
+ @param[in] VariableName The name of the key/database.
+ @param[in] DefaultName The name of the default variable.
+ @param[in] VendorGuid The namespace (ie. vendor GUID) of the variable
+
+ @retval EFI_OUT_OF_RESOURCES Out of memory while allocating AuthHeader.
+ @retval EFI_SUCCESS Successful enrollment.
+ @return Error codes from GetTime () and SetVariable ().
+**/
+STATIC
+EFI_STATUS
+EnrollFromDefault (
+ IN CHAR16 *VariableName,
+ IN CHAR16 *DefaultName,
+ IN EFI_GUID *VendorGuid
+ )
+{
+ VOID *Data;
+ UINTN DataSize;
+ EFI_STATUS Status;
+
+ Status = EFI_SUCCESS;
+
+ DataSize = 0;
+ Status = GetVariable2 (DefaultName, &gEfiGlobalVariableGuid, &Data, &DataSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "error: GetVariable (\"%s): %r\n", DefaultName, Status));
+ return Status;
+ }
+
+ CreateTimeBasedPayload (&DataSize, (UINT8 **)&Data);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Fail to create time-based data payload: %r", Status));
+ return Status;
+ }
+
+ //
+ // Allocate memory for auth variable
+ //
+ Status = gRT->SetVariable (
+ VariableName,
+ VendorGuid,
+ (EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS |
+ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS),
+ DataSize,
+ Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "error: %a (\"%s\", %g): %r\n", __FUNCTION__, VariableName,
+ VendorGuid, Status));
+ }
+
+ if (Data != NULL) {
+ FreePool (Data);
+ }
+
+ return Status;
+}
+
+/** Initializes PKDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+**/
+EFI_STATUS
+SecureBootInitPKDefault (
+ IN VOID
+ )
+{
+ EFI_SIGNATURE_LIST *EfiSig;
+ UINTN SigListsSize;
+ EFI_STATUS Status;
+ UINT8 *Data;
+ UINTN DataSize;
+
+ //
+ // Check if variable exists, if so do not change it
+ //
+ Status = GetVariable2 (EFI_PK_DEFAULT_VARIABLE_NAME, &gEfiGlobalVariableGuid, (VOID **) &Data, &DataSize);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Variable %s exists. Old value is preserved\n", EFI_PK_DEFAULT_VARIABLE_NAME));
+ FreePool (Data);
+ return EFI_UNSUPPORTED;
+ }
+
+ if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
+ return Status;
+ }
+
+ //
+ // Variable does not exist, can be initialized
+ //
+ DEBUG ((DEBUG_INFO, "Variable %s does not exist.\n", EFI_PK_DEFAULT_VARIABLE_NAME));
+
+ Status = SecureBootFetchData (&gDefaultPKFileGuid, &SigListsSize, &EfiSig);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Content for %s not found\n", EFI_PK_DEFAULT_VARIABLE_NAME));
+ return Status;
+ }
+
+ Status = gRT->SetVariable (
+ EFI_PK_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ SigListsSize,
+ (VOID *)EfiSig
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Failed to set %s\n", EFI_PK_DEFAULT_VARIABLE_NAME));
+ }
+
+ FreePool (EfiSig);
+
+ return Status;
+}
+
+/** Initializes KEKDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+**/
+EFI_STATUS
+SecureBootInitKEKDefault (
+ IN VOID
+ )
+{
+ EFI_SIGNATURE_LIST *EfiSig;
+ UINTN SigListsSize;
+ EFI_STATUS Status;
+ UINT8 *Data;
+ UINTN DataSize;
+
+ //
+ // Check if variable exists, if so do not change it
+ //
+ Status = GetVariable2 (EFI_KEK_DEFAULT_VARIABLE_NAME, &gEfiGlobalVariableGuid, (VOID **) &Data, &DataSize);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Variable %s exists. Old value is preserved\n", EFI_KEK_DEFAULT_VARIABLE_NAME));
+ FreePool (Data);
+ return EFI_UNSUPPORTED;
+ }
+
+ if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
+ return Status;
+ }
+
+ //
+ // Variable does not exist, can be initialized
+ //
+ DEBUG ((DEBUG_INFO, "Variable %s does not exist.\n", EFI_KEK_DEFAULT_VARIABLE_NAME));
+
+ Status = SecureBootFetchData (&gDefaultKEKFileGuid, &SigListsSize, &EfiSig);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Content for %s not found\n", EFI_KEK_DEFAULT_VARIABLE_NAME));
+ return Status;
+ }
+
+
+ Status = gRT->SetVariable (
+ EFI_KEK_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ SigListsSize,
+ (VOID *)EfiSig
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Failed to set %s\n", EFI_KEK_DEFAULT_VARIABLE_NAME));
+ }
+
+ FreePool (EfiSig);
+
+ return Status;
+}
+
+/** Initializes dbDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+**/
+EFI_STATUS
+SecureBootInitDbDefault (
+ IN VOID
+ )
+{
+ EFI_SIGNATURE_LIST *EfiSig;
+ UINTN SigListsSize;
+ EFI_STATUS Status;
+ UINT8 *Data;
+ UINTN DataSize;
+
+ Status = GetVariable2 (EFI_DB_DEFAULT_VARIABLE_NAME, &gEfiGlobalVariableGuid, (VOID **) &Data, &DataSize);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Variable %s exists. Old value is preserved\n", EFI_DB_DEFAULT_VARIABLE_NAME));
+ FreePool (Data);
+ return EFI_UNSUPPORTED;
+ }
+
+ if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
+ return Status;
+ }
+
+ DEBUG ((DEBUG_INFO, "Variable %s does not exist.\n", EFI_DB_DEFAULT_VARIABLE_NAME));
+
+ Status = SecureBootFetchData (&gDefaultdbFileGuid, &SigListsSize, &EfiSig);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = gRT->SetVariable (
+ EFI_DB_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ SigListsSize,
+ (VOID *)EfiSig
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Failed to set %s\n", EFI_DB_DEFAULT_VARIABLE_NAME));
+ }
+
+ FreePool (EfiSig);
+
+ return Status;
+}
+
+/** Initializes dbxDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+**/
+EFI_STATUS
+SecureBootInitDbxDefault (
+ IN VOID
+ )
+{
+ EFI_SIGNATURE_LIST *EfiSig;
+ UINTN SigListsSize;
+ EFI_STATUS Status;
+ UINT8 *Data;
+ UINTN DataSize;
+
+ //
+ // Check if variable exists, if so do not change it
+ //
+ Status = GetVariable2 (EFI_DBX_DEFAULT_VARIABLE_NAME, &gEfiGlobalVariableGuid, (VOID **) &Data, &DataSize);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Variable %s exists. Old value is preserved\n", EFI_DBX_DEFAULT_VARIABLE_NAME));
+ FreePool (Data);
+ return EFI_UNSUPPORTED;
+ }
+
+ if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
+ return Status;
+ }
+
+ //
+ // Variable does not exist, can be initialized
+ //
+ DEBUG ((DEBUG_INFO, "Variable %s does not exist.\n", EFI_DBX_DEFAULT_VARIABLE_NAME));
+
+ Status = SecureBootFetchData (&gDefaultdbxFileGuid, &SigListsSize, &EfiSig);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Content for %s not found\n", EFI_DBX_DEFAULT_VARIABLE_NAME));
+ return Status;
+ }
+
+ Status = gRT->SetVariable (
+ EFI_DBX_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ SigListsSize,
+ (VOID *)EfiSig
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Failed to set %s\n", EFI_DBX_DEFAULT_VARIABLE_NAME));
+ }
+
+ FreePool (EfiSig);
+
+ return Status;
+}
+
+/** Initializes dbtDefault variable with data from FFS section.
+
+ @retval EFI_SUCCESS Variable was initialized successfully.
+ @retval EFI_UNSUPPORTED Variable already exists.
+**/
+EFI_STATUS
+SecureBootInitDbtDefault (
+ IN VOID
+ )
+{
+ EFI_SIGNATURE_LIST *EfiSig;
+ UINTN SigListsSize;
+ EFI_STATUS Status;
+ UINT8 *Data;
+ UINTN DataSize;
+
+ //
+ // Check if variable exists, if so do not change it
+ //
+ Status = GetVariable2 (EFI_DBT_DEFAULT_VARIABLE_NAME, &gEfiGlobalVariableGuid, (VOID **) &Data, &DataSize);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Variable %s exists. Old value is preserved\n", EFI_DBT_DEFAULT_VARIABLE_NAME));
+ FreePool (Data);
+ return EFI_UNSUPPORTED;
+ }
+
+ if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
+ return Status;
+ }
+
+ //
+ // Variable does not exist, can be initialized
+ //
+ DEBUG ((DEBUG_INFO, "Variable %s does not exist.\n", EFI_DBT_DEFAULT_VARIABLE_NAME));
+
+ Status = SecureBootFetchData (&gDefaultdbtFileGuid, &SigListsSize, &EfiSig);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = gRT->SetVariable (
+ EFI_DBT_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ SigListsSize,
+ (VOID *)EfiSig
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_INFO, "Failed to set %s\n", EFI_DBT_DEFAULT_VARIABLE_NAME));
+ }
+
+ FreePool (EfiSig);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Sets the content of the 'db' variable based on 'dbDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
+**/
+EFI_STATUS
+EFIAPI
+EnrollDbFromDefault (
+ VOID
+)
+{
+ EFI_STATUS Status;
+
+ Status = EnrollFromDefault (
+ EFI_IMAGE_SECURITY_DATABASE,
+ EFI_DB_DEFAULT_VARIABLE_NAME,
+ &gEfiImageSecurityDatabaseGuid
+ );
+
+ return Status;
+}
+
+/**
+ Sets the content of the 'dbx' variable based on 'dbxDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
+**/
+EFI_STATUS
+EFIAPI
+EnrollDbxFromDefault (
+ VOID
+)
+{
+ EFI_STATUS Status;
+
+ Status = EnrollFromDefault (
+ EFI_IMAGE_SECURITY_DATABASE1,
+ EFI_DBX_DEFAULT_VARIABLE_NAME,
+ &gEfiImageSecurityDatabaseGuid
+ );
+
+ return Status;
+}
+
+/**
+ Sets the content of the 'dbt' variable based on 'dbtDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
+**/
+EFI_STATUS
+EFIAPI
+EnrollDbtFromDefault (
+ VOID
+)
+{
+ EFI_STATUS Status;
+
+ Status = EnrollFromDefault (
+ EFI_IMAGE_SECURITY_DATABASE2,
+ EFI_DBT_DEFAULT_VARIABLE_NAME,
+ &gEfiImageSecurityDatabaseGuid);
+
+ return Status;
+}
+
+/**
+ Sets the content of the 'KEK' variable based on 'KEKDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
+**/
+EFI_STATUS
+EFIAPI
+EnrollKEKFromDefault (
+ VOID
+)
+{
+ EFI_STATUS Status;
+
+ Status = EnrollFromDefault (
+ EFI_KEY_EXCHANGE_KEY_NAME,
+ EFI_KEK_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid
+ );
+
+ return Status;
+}
+
+/**
+ Sets the content of the 'KEK' variable based on 'KEKDefault' variable content.
+
+ @retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
+ while VendorGuid is NULL.
+ @retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
+**/
+EFI_STATUS
+EFIAPI
+EnrollPKFromDefault (
+ VOID
+)
+{
+ EFI_STATUS Status;
+
+ Status = EnrollFromDefault (
+ EFI_PLATFORM_KEY_NAME,
+ EFI_PK_DEFAULT_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid
+ );
+
+ return Status;
+}
diff --git a/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.uni b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.uni
new file mode 100644
index 0000000000..68d928ef30
--- /dev/null
+++ b/SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.uni
@@ -0,0 +1,16 @@
+// /** @file
+//
+// Provides initialization of Secure Boot keys and databases.
+//
+// Copyright (c) 2021, ARM Ltd. All rights reserved.<BR>
+// Copyright (c) 2021, Semihalf All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "Provides functions to initialize PK, KEK and databases based on default variables."
+
+#string STR_MODULE_DESCRIPTION #language en-US "Provides functions to initialize PK, KEK and databases based on default variables."
+
--
2.25.1
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