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147 lines
7.2 KiB
C
147 lines
7.2 KiB
C
/** @file
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This library class defines a set of interfaces to abstract the policy of
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security measurement by managing the different security measurement services.
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The library instances can be implemented according to the different security policy.
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Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __SECURITY_MANAGEMENT_LIB_H__
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#define __SECURITY_MANAGEMENT_LIB_H__
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#define EFI_AUTH_OPERATION_NONE 0x00
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#define EFI_AUTH_OPERATION_VERIFY_IMAGE 0x01
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#define EFI_AUTH_OPERATION_DEFER_IMAGE_LOAD 0x02
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#define EFI_AUTH_OPERATION_MEASURE_IMAGE 0x04
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///
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/// Image buffer is required by the security handler.
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///
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#define EFI_AUTH_OPERATION_IMAGE_REQUIRED 0x80000000
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/**
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The security handler is used to abstract platform-specific policy
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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 at the time, 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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FileBuffer will be NULL and FileSize will be 0 if the handler being called
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did not set EFI_AUTH_OPERATION_IMAGE_REQUIRED when it was registered.
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@param[in] AuthenticationStatus
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The authentication status returned from the security
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measurement services for the input file.
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@param[in] File The 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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@param[in] FileBuffer The file buffer matches the input file device path.
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@param[in] FileSize The size of File buffer matches the input file device path.
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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 The file 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 *SECURITY_FILE_AUTHENTICATION_STATE_HANDLER)(
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IN OUT UINT32 AuthenticationStatus,
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IN CONST EFI_DEVICE_PATH_PROTOCOL *File,
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IN VOID *FileBuffer,
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IN UINTN FileSize
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);
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/**
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Register security measurement handler with its operation type. Different
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handlers with the same operation can all be registered.
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If SecurityHandler is NULL, then ASSERT().
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If no enough resources available to register new handler, then ASSERT().
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If AuthenticationOperation is not recongnized, then ASSERT().
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If the previous register handler can't be executed before the later register handler, then ASSERT().
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@param[in] SecurityHandler The security measurement service handler to be registered.
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@param[in] AuthenticationOperation Theoperation type is specified for the registered handler.
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@retval EFI_SUCCESS The handlers were registered successfully.
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**/
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EFI_STATUS
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EFIAPI
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RegisterSecurityHandler (
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IN SECURITY_FILE_AUTHENTICATION_STATE_HANDLER SecurityHandler,
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IN UINT32 AuthenticationOperation
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);
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/**
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Execute registered handlers until one returns an error and that error is returned.
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If none of the handlers return an error, then EFI_SUCCESS is returned.
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Before exectue handler, get the image buffer by file device path if a handler
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requires the image file. And return the image buffer to each handler when exectue handler.
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The handlers are executed in same order to their registered order.
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@param[in] 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[in] FilePath 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 authenticated when more
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than one security handler services were registered,
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or the file did not authenticate when no security
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handler service was registered. And the platform policy
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dictates that the DXE Core may use File.
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@retval EFI_INVALID_PARAMETER File 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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EFI_STATUS
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EFIAPI
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ExecuteSecurityHandlers (
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IN UINT32 AuthenticationStatus,
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IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath
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);
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#endif
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