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/** @file
Security Architectural Protocol as defined in PI Specification VOLUME 2 DXE
Used to provide Security services. Specifically, dependening upon the
authentication state of a discovered driver in a Firmware Volume, the
portable DXE Core Dispatcher will call into the Security Architectural
Protocol (SAP) with the authentication state of the driver.
This call-out allows for OEM-specific policy decisions to be made, such
as event logging for attested boots, locking flash in response to discovering
an unsigned driver or failed signature check, or other exception response.
The SAP can also change system behavior by having the DXE core put a driver
in the Schedule-On-Request (SOR) state. This will allow for later disposition
of the driver by platform agent, such as Platform BDS.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __ARCH_PROTOCOL_SECURITY_H__
#define __ARCH_PROTOCOL_SECURITY_H__
///
/// Global ID for the Security Code Architectural Protocol
///
#define EFI_SECURITY_ARCH_PROTOCOL_GUID \
{ 0xA46423E3, 0x4617, 0x49f1, {0xB9, 0xFF, 0xD1, 0xBF, 0xA9, 0x11, 0x58, 0x39 } }
typedef struct _EFI_SECURITY_ARCH_PROTOCOL EFI_SECURITY_ARCH_PROTOCOL;
/**
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 The file specified by File did authenticate, and the
platform policy dictates that the DXE Core may use File.
@retval EFI_INVALID_PARAMETER Driver is NULL.
@retval EFI_SECURITY_VIOLATION The file specified by File did not authenticate, and
the platform policy dictates that File should be placed
in the untrusted state. A file may be promoted from
the untrusted to the trusted state at a future time
with a call to the Trust() DXE Service.
@retval EFI_ACCESS_DENIED The file specified by File did not authenticate, and
the platform policy dictates that File should not be
used for any purpose.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SECURITY_FILE_AUTHENTICATION_STATE)(
IN CONST EFI_SECURITY_ARCH_PROTOCOL *This,
IN UINT32 AuthenticationStatus,
IN CONST EFI_DEVICE_PATH_PROTOCOL *File
);
///
/// The EFI_SECURITY_ARCH_PROTOCOL is used to abstract platform-specific policy
/// from the DXE core. This includes locking flash upon failure to authenticate,
/// attestation logging, and other exception operations.
///
struct _EFI_SECURITY_ARCH_PROTOCOL {
EFI_SECURITY_FILE_AUTHENTICATION_STATE FileAuthenticationState;
};
extern EFI_GUID gEfiSecurityArchProtocolGuid;
#endif
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