mirror of https://github.com/acidanthera/audk.git
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/** @file
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EFI PEI Core Security services
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Copyright (c) 2006 - 2019, 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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#include "PeiMain.h"
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EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {
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EFI_PEI_PPI_DESCRIPTOR_NOTIFY_DISPATCH | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
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&gEfiPeiSecurity2PpiGuid,
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SecurityPpiNotifyCallback
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};
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/**
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Initialize the security services.
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@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
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@param OldCoreData Pointer to the old core data.
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NULL if being run in non-permanent memory mode.
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**/
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VOID
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InitializeSecurityServices (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_CORE_INSTANCE *OldCoreData
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)
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{
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if (OldCoreData == NULL) {
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PeiServicesNotifyPpi (&mNotifyList);
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}
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return;
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}
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/**
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Provide a callback for when the security PPI is installed.
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This routine will cache installed security PPI into PeiCore's private data.
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@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
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@param NotifyDescriptor The descriptor for the notification event.
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@param Ppi Pointer to the PPI in question.
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@return Always success
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**/
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EFI_STATUS
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EFIAPI
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SecurityPpiNotifyCallback (
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
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IN VOID *Ppi
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)
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{
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PEI_CORE_INSTANCE *PrivateData;
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//
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// Get PEI Core private data
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//
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PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);
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//
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// If there isn't a security PPI installed, use the one from notification
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//
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if (PrivateData->PrivateSecurityPpi == NULL) {
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PrivateData->PrivateSecurityPpi = (EFI_PEI_SECURITY2_PPI *)Ppi;
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}
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return EFI_SUCCESS;
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}
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/**
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Provide a callout to the security verification service.
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@param PrivateData PeiCore's private data structure
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@param VolumeHandle Handle of FV
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@param FileHandle Handle of PEIM's FFS
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@param AuthenticationStatus Authentication status
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@retval EFI_SUCCESS Image is OK
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@retval EFI_SECURITY_VIOLATION Image is illegal
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@retval EFI_NOT_FOUND If security PPI is not installed.
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**/
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EFI_STATUS
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VerifyPeim (
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IN PEI_CORE_INSTANCE *PrivateData,
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IN EFI_PEI_FV_HANDLE VolumeHandle,
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IN EFI_PEI_FILE_HANDLE FileHandle,
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IN UINT32 AuthenticationStatus
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)
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{
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EFI_STATUS Status;
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BOOLEAN DeferExecution;
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Status = EFI_NOT_FOUND;
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if (PrivateData->PrivateSecurityPpi == NULL) {
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//
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// Check AuthenticationStatus first.
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//
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if ((AuthenticationStatus & EFI_AUTH_STATUS_IMAGE_SIGNED) != 0) {
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if ((AuthenticationStatus & (EFI_AUTH_STATUS_TEST_FAILED | EFI_AUTH_STATUS_NOT_TESTED)) != 0) {
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Status = EFI_SECURITY_VIOLATION;
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}
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}
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} else {
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//
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// Check to see if the image is OK
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//
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Status = PrivateData->PrivateSecurityPpi->AuthenticationState (
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(CONST EFI_PEI_SERVICES **)&PrivateData->Ps,
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PrivateData->PrivateSecurityPpi,
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AuthenticationStatus,
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VolumeHandle,
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FileHandle,
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&DeferExecution
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);
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if (DeferExecution) {
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Status = EFI_SECURITY_VIOLATION;
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}
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}
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return Status;
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}
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/**
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Verify a Firmware volume.
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@param CurrentFvAddress Pointer to the current Firmware Volume under consideration
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@retval EFI_SUCCESS Firmware Volume is legal
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**/
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EFI_STATUS
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VerifyFv (
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IN EFI_FIRMWARE_VOLUME_HEADER *CurrentFvAddress
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)
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{
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//
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// Right now just pass the test. Future can authenticate and/or check the
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// FV-header or other metric for goodness of binary.
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//
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return EFI_SUCCESS;
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}
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