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/** @file
This file declares Pei Security2 PPI.
This PPI is installed by some platform PEIM that abstracts the security
policy to the PEI Foundation, namely the case of a PEIM's authentication
state being returned during the PEI section extraction process.
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.
@par Revision Reference:
This PPI is introduced in PI Version 1.0.
**/
#ifndef __SECURITY2_PPI_H__
#define __SECURITY2_PPI_H__
#define EFI_PEI_SECURITY2_PPI_GUID \
{ 0xdcd0be23, 0x9586, 0x40f4, { 0xb6, 0x43, 0x6, 0x52, 0x2c, 0xed, 0x4e, 0xde } }
typedef struct _EFI_PEI_SECURITY2_PPI EFI_PEI_SECURITY2_PPI;
/**
Allows the platform builder to implement a security policy
in response to varying file authentication states.
This service is published by some platform PEIM. The purpose of
this service is to expose a given platform's policy-based
response to the PEI Foundation. For example, if there is a PEIM
in a GUIDed encapsulation section and the extraction of the PEI
file section yields an authentication failure, there is no a
priori policy in the PEI Foundation. Specifically, this
situation leads to the question whether PEIMs that are either
not in GUIDed sections or are in sections whose authentication
fails should still be executed.
@param PeiServices An indirect pointer to the PEI Services
Table published by the PEI Foundation.
@param This Interface pointer that implements the
particular EFI_PEI_SECURITY2_PPI instance.
@param AuthenticationStatus Authentication status of the file.
xx00 Image was not signed.
xxx1 Platform security policy override.
Assumes same meaning as 0010 (the image was signed, the
signature was tested, and the signature passed authentication test).
0010 Image was signed, the signature was tested,
and the signature passed authentication test.
0110 Image was signed and the signature was not tested.
1010 Image was signed, the signature was tested,
and the signature failed the authentication test.
@param FvHandle Handle of the volume in which the file
resides. This allows different policies
depending on different firmware volumes.
@param FileHandle Handle of the file under review.
@param DeferExecution Pointer to a variable that alerts the
PEI Foundation to defer execution of a
PEIM.
@retval EFI_SUCCESS The service performed its action successfully.
@retval EFI_SECURITY_VIOLATION The object cannot be trusted.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_SECURITY_AUTHENTICATION_STATE)(
IN CONST EFI_PEI_SERVICES **PeiServices,
IN CONST EFI_PEI_SECURITY2_PPI *This,
IN UINT32 AuthenticationStatus,
IN EFI_PEI_FV_HANDLE FvHandle,
IN EFI_PEI_FV_HANDLE FileHandle,
IN OUT BOOLEAN *DeferExecution
);
///
/// This PPI is a means by which the platform builder can indicate
/// a response to a PEIM's authentication state. This can be in
/// the form of a requirement for the PEI Foundation to skip a
/// module using the DeferExecution Boolean output in the
/// AuthenticationState() member function. Alternately, the
/// Security PPI can invoke something like a cryptographic PPI
/// that hashes the PEIM contents to log attestations, for which
/// the FileHandle parameter in AuthenticationState() will be
/// useful. If this PPI does not exist, PEIMs will be considered
/// trusted.
///
struct _EFI_PEI_SECURITY2_PPI {
EFI_PEI_SECURITY_AUTHENTICATION_STATE AuthenticationState;
};
extern EFI_GUID gEfiPeiSecurity2PpiGuid;
#endif
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