From dc9bd6ed281fcba5358f3004632bdbda968be1e5 Mon Sep 17 00:00:00 2001 From: "Zhang, Chao B" Date: Wed, 18 Jan 2017 11:32:47 +0800 Subject: [PATCH] MdeModulePkg: Variable: Update PCR[7] measure for new TCG spec Measure DBT into PCR[7] when it is updated between initial measure and ExitBootService. Measure "SecureBoot" change after PK update. Spec version : TCG PC Client PFP 00.37. http://www.trustedcomputinggroup.org/wp-content/uploads/PC-ClientSpecific_Platform_Profile_for_TPM_2p0_Systems_v21.pdf Cc: Star Zeng Cc: Yao Jiewen Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chao Zhang Reviewed-by: Star Zeng Reviewed-by: Yao Jiewen --- .../Variable/RuntimeDxe/Measurement.c | 82 ++++++++++++++++++- .../Variable/RuntimeDxe/VariableDxe.c | 19 ++++- .../RuntimeDxe/VariableRuntimeDxe.inf | 10 ++- .../RuntimeDxe/VariableSmmRuntimeDxe.c | 19 ++++- .../RuntimeDxe/VariableSmmRuntimeDxe.inf | 7 +- 5 files changed, 128 insertions(+), 9 deletions(-) diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Measurement.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Measurement.c index 2f92fae310..309521f923 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Measurement.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Measurement.c @@ -1,7 +1,7 @@ /** @file Measure TrEE required variable. -Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.
+Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.
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 @@ -36,8 +36,16 @@ VARIABLE_TYPE mVariableType[] = { {EFI_KEY_EXCHANGE_KEY_NAME, &gEfiGlobalVariableGuid}, {EFI_IMAGE_SECURITY_DATABASE, &gEfiImageSecurityDatabaseGuid}, {EFI_IMAGE_SECURITY_DATABASE1, &gEfiImageSecurityDatabaseGuid}, + {EFI_IMAGE_SECURITY_DATABASE2, &gEfiImageSecurityDatabaseGuid}, }; +// +// "SecureBoot" may update following PK Del/Add +// Cache its value to detect value update +// +UINT8 *mSecureBootVarData = NULL; +UINTN mSecureBootVarDataSize = 0; + /** This function will return if this variable is SecureBootPolicy Variable. @@ -251,5 +259,77 @@ SecureBootHook ( FreePool (VariableData); } + // + // "SecureBoot" is 8bit & read-only. It can only be changed according to PK update + // + if ((StrCmp (VariableName, EFI_PLATFORM_KEY_NAME) == 0) && + CompareGuid (VendorGuid, &gEfiGlobalVariableGuid)) { + Status = InternalGetVariable ( + EFI_SECURE_BOOT_MODE_NAME, + &gEfiGlobalVariableGuid, + &VariableData, + &VariableDataSize + ); + if (EFI_ERROR (Status)) { + return; + } + + // + // If PK update is successful. "SecureBoot" shall always exist ever since variable write service is ready + // + ASSERT(mSecureBootVarData != NULL); + + if (CompareMem(mSecureBootVarData, VariableData, VariableDataSize) != 0) { + FreePool(mSecureBootVarData); + mSecureBootVarData = VariableData; + mSecureBootVarDataSize = VariableDataSize; + + DEBUG((DEBUG_INFO, "%s variable updated according to PK change. Remeasure the value!\n", EFI_SECURE_BOOT_MODE_NAME)); + Status = MeasureVariable ( + EFI_SECURE_BOOT_MODE_NAME, + &gEfiGlobalVariableGuid, + mSecureBootVarData, + mSecureBootVarDataSize + ); + DEBUG ((DEBUG_INFO, "MeasureBootPolicyVariable - %r\n", Status)); + } else { + // + // "SecureBoot" variable is not changed + // + FreePool(VariableData); + } + } + return ; } + +/** + Some Secure Boot Policy Variable may update following other variable changes(SecureBoot follows PK change, etc). + Record their initial State when variable write service is ready. + +**/ +VOID +EFIAPI +RecordSecureBootPolicyVarData( + VOID + ) +{ + EFI_STATUS Status; + + // + // Record initial "SecureBoot" variable value. + // It is used to detect SecureBoot variable change in SecureBootHook. + // + Status = InternalGetVariable ( + EFI_SECURE_BOOT_MODE_NAME, + &gEfiGlobalVariableGuid, + (VOID **)&mSecureBootVarData, + &mSecureBootVarDataSize + ); + if (EFI_ERROR(Status)) { + // + // Read could fail when Auth Variable solution is not supported + // + DEBUG((DEBUG_INFO, "RecordSecureBootPolicyVarData GetVariable %s Status %x\n", EFI_SECURE_BOOT_MODE_NAME, Status)); + } +} diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c index 3d3cd24e0d..fe1b2b588c 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c @@ -3,7 +3,7 @@ and volatile storage space and install variable architecture protocol. Copyright (C) 2013, Red Hat, Inc. -Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.
(C) Copyright 2015 Hewlett Packard Enterprise Development LP
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License @@ -31,6 +31,17 @@ EDKII_VAR_CHECK_PROTOCOL mVarCheck = { VarCheckRegis VarCheckVariablePropertySet, VarCheckVariablePropertyGet }; +/** + Some Secure Boot Policy Variable may update following other variable changes(SecureBoot follows PK change, etc). + Record their initial State when variable write service is ready. + +**/ +VOID +EFIAPI +RecordSecureBootPolicyVarData( + VOID + ); + /** Return TRUE if ExitBootServices () has been called. @@ -414,6 +425,12 @@ FtwNotificationEvent ( DEBUG ((DEBUG_ERROR, "Variable write service initialization failed. Status = %r\n", Status)); } + // + // Some Secure Boot Policy Var (SecureBoot, etc) updates following other + // Secure Boot Policy Variable change. Record their initial value. + // + RecordSecureBootPolicyVarData(); + // // Install the Variable Write Architectural protocol. // diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf index 6214966c45..bc24a251c8 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf @@ -9,7 +9,7 @@ # This external input must be validated carefully to avoid security issues such as # buffer overflow or integer overflow. # -# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.
+# Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.
# 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 @@ -94,6 +94,9 @@ ## SOMETIMES_PRODUCES ## Variable:L"PlatformLang" ## SOMETIMES_CONSUMES ## Variable:L"Lang" ## SOMETIMES_PRODUCES ## Variable:L"Lang" + ## SOMETIMES_CONSUMES ## Variable:L"PK" + ## SOMETIMES_CONSUMES ## Variable:L"KEK" + ## SOMETIMES_CONSUMES ## Variable:L"SecureBoot" gEfiGlobalVariableGuid gEfiMemoryOverwriteControlDataGuid ## SOMETIMES_CONSUMES ## Variable:L"MemoryOverwriteRequestControl" @@ -108,8 +111,9 @@ ## SOMETIMES_PRODUCES ## Variable:L"VarErrorFlag" gEdkiiVarErrorFlagGuid - ## SOMETIMES_CONSUMES ## Variable:L"DB" - ## SOMETIMES_CONSUMES ## Variable:L"DBX" + ## SOMETIMES_CONSUMES ## Variable:L"db" + ## SOMETIMES_CONSUMES ## Variable:L"dbx" + ## SOMETIMES_CONSUMES ## Variable:L"dbt" gEfiImageSecurityDatabaseGuid [Pcd] diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c index 0a076ae467..e209d54755 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c @@ -13,7 +13,7 @@ InitCommunicateBuffer() is really function to check the variable data size. -Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.
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 @@ -70,6 +70,17 @@ SecureBootHook ( IN EFI_GUID *VendorGuid ); +/** + Some Secure Boot Policy Variable may update following other variable changes(SecureBoot follows PK change, etc). + Record their initial State when variable write service is ready. + +**/ +VOID +EFIAPI +RecordSecureBootPolicyVarData( + VOID + ); + /** Acquires lock only at boot time. Simply returns at runtime. @@ -1079,6 +1090,12 @@ SmmVariableWriteReady ( return; } + // + // Some Secure Boot Policy Var (SecureBoot, etc) updates following other + // Secure Boot Policy Variable change. Record their initial value. + // + RecordSecureBootPolicyVarData(); + Status = gBS->InstallProtocolInterface ( &mHandle, &gEfiVariableWriteArchProtocolGuid, diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.inf b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.inf index 82ddb00a19..9975f5ae1d 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.inf +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.inf @@ -13,7 +13,7 @@ # may not be modified without authorization. If platform fails to protect these resources, # the authentication service provided in this driver will be broken, and the behavior is undefined. # -# Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.
+# Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.
# 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 @@ -81,8 +81,9 @@ ## SOMETIMES_CONSUMES ## Variable:L"SecureBoot" gEfiGlobalVariableGuid - ## SOMETIMES_CONSUMES ## Variable:L"DB" - ## SOMETIMES_CONSUMES ## Variable:L"DBX" + ## SOMETIMES_CONSUMES ## Variable:L"db" + ## SOMETIMES_CONSUMES ## Variable:L"dbx" + ## SOMETIMES_CONSUMES ## Variable:L"dbt" gEfiImageSecurityDatabaseGuid [Depex] -- 2.39.2