/** @file | |
This driver implements a sample platform security service, which does | |
nothing and always return EFI_SUCCESS. | |
Copyright (c) 2006 - 2008, 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 | |
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 <Uefi.h> | |
#include <Protocol/Security.h> | |
#include <Library/DebugLib.h> | |
#include <Library/UefiBootServicesTableLib.h> | |
#include <Library/UefiDriverEntryPoint.h> | |
// | |
// Handle for the Security Architectural Protocol instance produced by this driver | |
// | |
EFI_HANDLE mSecurityArchProtocolHandle = NULL; | |
/** | |
The EFI_SECURITY_ARCH_PROTOCOL (SAP) is used to abstract platform-specific | |
policy from the DXE core response to an attempt to use a file that returns a | |
given status for the authentication check from the section extraction protocol. | |
The possible responses in a given SAP implementation may include locking | |
flash upon failure to authenticate, attestation logging for all signed drivers, | |
and other exception operations. The File parameter allows for possible logging | |
within the SAP of the driver. | |
If File is NULL, then EFI_INVALID_PARAMETER is returned. | |
If the file specified by File with an authentication status specified by | |
AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned. | |
If the file specified by File with an authentication status specified by | |
AuthenticationStatus is not safe for the DXE Core to use under any circumstances, | |
then EFI_ACCESS_DENIED is returned. | |
If the file specified by File with an authentication status specified by | |
AuthenticationStatus is not safe for the DXE Core to use right now, but it | |
might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is | |
returned. | |
@param This The EFI_SECURITY_ARCH_PROTOCOL instance. | |
@param AuthenticationStatus | |
This is the authentication type returned from the Section | |
Extraction protocol. See the Section Extraction Protocol | |
Specification for details on this type. | |
@param File This is a pointer to the device path of the file that is | |
being dispatched. This will optionally be used for logging. | |
@retval EFI_SUCCESS Do nothing and return success. | |
@retval EFI_INVALID_PARAMETER File is NULL. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
SecurityStubAuthenticateState ( | |
IN CONST EFI_SECURITY_ARCH_PROTOCOL *This, | |
IN UINT32 AuthenticationStatus, | |
IN CONST EFI_DEVICE_PATH_PROTOCOL *File | |
) | |
{ | |
if (File == NULL) { | |
return EFI_INVALID_PARAMETER; | |
} | |
return EFI_SUCCESS; | |
} | |
// | |
// Security Architectural Protocol instance produced by this driver | |
// | |
EFI_SECURITY_ARCH_PROTOCOL mSecurityStub = { | |
SecurityStubAuthenticateState | |
}; | |
/** | |
Installs Security Architectural Protocol. | |
@param ImageHandle The image handle of this driver. | |
@param SystemTable A pointer to the EFI System Table. | |
@retval EFI_SUCCESS Install the sample Security Architectural Protocol successfully. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
SecurityStubInitialize ( | |
IN EFI_HANDLE ImageHandle, | |
IN EFI_SYSTEM_TABLE *SystemTable | |
) | |
{ | |
EFI_STATUS Status; | |
// | |
// Make sure the Security Architectural Protocol is not already installed in the system | |
// | |
ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiSecurityArchProtocolGuid); | |
// | |
// Install the Security Architectural Protocol onto a new handle | |
// | |
Status = gBS->InstallMultipleProtocolInterfaces ( | |
&mSecurityArchProtocolHandle, | |
&gEfiSecurityArchProtocolGuid, | |
&mSecurityStub, | |
NULL | |
); | |
ASSERT_EFI_ERROR (Status); | |
return EFI_SUCCESS; | |
} |