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98 lines
4.4 KiB
C
98 lines
4.4 KiB
C
/** @file
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Security Architectural Protocol as defined in PI Specification VOLUME 2 DXE
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Used to provide Security services. Specifically, dependening upon the
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authentication state of a discovered driver in a Firmware Volume, the
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portable DXE Core Dispatcher will call into the Security Architectural
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Protocol (SAP) with the authentication state of the driver.
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This call-out allows for OEM-specific policy decisions to be made, such
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as event logging for attested boots, locking flash in response to discovering
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an unsigned driver or failed signature check, or other exception response.
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The SAP can also change system behavior by having the DXE core put a driver
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in the Schedule-On-Request (SOR) state. This will allow for later disposition
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of the driver by platform agent, such as Platform BDS.
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Copyright (c) 2006 - 2018, 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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#ifndef __ARCH_PROTOCOL_SECURITY_H__
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#define __ARCH_PROTOCOL_SECURITY_H__
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///
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/// Global ID for the Security Code Architectural Protocol
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///
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#define EFI_SECURITY_ARCH_PROTOCOL_GUID \
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{ 0xA46423E3, 0x4617, 0x49f1, {0xB9, 0xFF, 0xD1, 0xBF, 0xA9, 0x11, 0x58, 0x39 } }
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typedef struct _EFI_SECURITY_ARCH_PROTOCOL EFI_SECURITY_ARCH_PROTOCOL;
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/**
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The EFI_SECURITY_ARCH_PROTOCOL (SAP) is used to abstract platform-specific
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policy from the DXE core response to an attempt to use a file that returns a
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given status for the authentication check from the section extraction protocol.
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The possible responses in a given SAP implementation may include locking
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flash upon failure to authenticate, attestation logging for all signed drivers,
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and other exception operations. The File parameter allows for possible logging
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within the SAP of the driver.
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If File is NULL, then EFI_INVALID_PARAMETER is returned.
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If the file specified by File with an authentication status specified by
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AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned.
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If the file specified by File with an authentication status specified by
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AuthenticationStatus is not safe for the DXE Core to use under any circumstances,
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then EFI_ACCESS_DENIED is returned.
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If the file specified by File with an authentication status specified by
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AuthenticationStatus is not safe for the DXE Core to use right now, but it
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might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is
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returned.
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@param This The EFI_SECURITY_ARCH_PROTOCOL instance.
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@param AuthenticationStatus
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This is the authentication type returned from the Section
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Extraction protocol. See the Section Extraction Protocol
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Specification for details on this type.
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@param File This is a pointer to the device path of the file that is
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being dispatched. This will optionally be used for logging.
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@retval EFI_SUCCESS The file specified by File did authenticate, and the
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platform policy dictates that the DXE Core may use File.
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@retval EFI_INVALID_PARAMETER Driver is NULL.
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@retval EFI_SECURITY_VIOLATION The file specified by File did not authenticate, and
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the platform policy dictates that File should be placed
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in the untrusted state. A file may be promoted from
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the untrusted to the trusted state at a future time
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with a call to the Trust() DXE Service.
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@retval EFI_ACCESS_DENIED The file specified by File did not authenticate, and
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the platform policy dictates that File should not be
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used for any purpose.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SECURITY_FILE_AUTHENTICATION_STATE)(
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IN CONST EFI_SECURITY_ARCH_PROTOCOL *This,
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IN UINT32 AuthenticationStatus,
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IN CONST EFI_DEVICE_PATH_PROTOCOL *File
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);
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///
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/// The EFI_SECURITY_ARCH_PROTOCOL is used to abstract platform-specific policy
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/// from the DXE core. This includes locking flash upon failure to authenticate,
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/// attestation logging, and other exception operations.
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///
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struct _EFI_SECURITY_ARCH_PROTOCOL {
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EFI_SECURITY_FILE_AUTHENTICATION_STATE FileAuthenticationState;
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};
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extern EFI_GUID gEfiSecurityArchProtocolGuid;
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#endif
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