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/** @file
This library class defines a set of interfaces to abstract the policy of
security measurement by managing the different security measurement services.
The library instances can be implemented according to the different security policy.
Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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.
**/
#ifndef __SECURITY_MANAGEMENT_LIB_H__
#define __SECURITY_MANAGEMENT_LIB_H__
//
// Authentication Operation defintions for User Identity (UID), Measured and Secure boot.
//
#define EFI_AUTH_OPERATION_NONE 0x00
#define EFI_AUTH_OPERATION_VERIFY_IMAGE 0x01
#define EFI_AUTH_OPERATION_DEFER_IMAGE_LOAD 0x02
#define EFI_AUTH_OPERATION_MEASURE_IMAGE 0x04
#define EFI_AUTH_OPERATION_CONNECT_POLICY 0x08
//
// Authentication State Operation will check the authentication status of a file.
//
#define EFI_AUTH_OPERATION_AUTHENTICATION_STATE 0x10
///
/// Image buffer is required by the security handler.
///
#define EFI_AUTH_OPERATION_IMAGE_REQUIRED 0x80000000
/**
The security handler 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 at the time, but it
might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is
returned.
FileBuffer will be NULL and FileSize will be 0 if the handler being called
did not set EFI_AUTH_OPERATION_IMAGE_REQUIRED when it was registered.
@param[in] AuthenticationStatus
The authentication status returned from the security
measurement services for the input file.
@param[in] File The pointer to the device path of the file that is
being dispatched. This will optionally be used for logging.
@param[in] FileBuffer The file buffer matches the input file device path.
@param[in] FileSize The size of File buffer matches the input file device path.
@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 The file 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 *SECURITY_FILE_AUTHENTICATION_STATE_HANDLER)(
IN OUT UINT32 AuthenticationStatus,
IN CONST EFI_DEVICE_PATH_PROTOCOL *File,
IN VOID *FileBuffer,
IN UINTN FileSize
);
/**
Register security measurement handler with its operation type. Different
handlers with the same operation can all be registered.
If SecurityHandler is NULL, then ASSERT().
If no enough resources available to register new handler, then ASSERT().
If AuthenticationOperation is not recongnized, then ASSERT().
If the previous register handler can't be executed before the later register handler, then ASSERT().
@param[in] SecurityHandler The security measurement service handler to be registered.
@param[in] AuthenticationOperation Theoperation type is specified for the registered handler.
@retval EFI_SUCCESS The handlers were registered successfully.
**/
EFI_STATUS
EFIAPI
RegisterSecurityHandler (
IN SECURITY_FILE_AUTHENTICATION_STATE_HANDLER SecurityHandler,
IN UINT32 AuthenticationOperation
);
/**
Execute registered handlers until one returns an error and that error is returned.
If none of the handlers return an error, then EFI_SUCCESS is returned.
Before exectue handler, get the image buffer by file device path if a handler
requires the image file. And return the image buffer to each handler when exectue handler.
The handlers are executed in same order to their registered order.
@param[in] AuthenticationStatus
This is the authentication type returned from the Section
Extraction protocol. See the Section Extraction Protocol
Specification for details on this type.
@param[in] FilePath 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 authenticated when more
than one security handler services were registered,
or the file did not authenticate when no security
handler service was registered. And the platform policy
dictates that the DXE Core may use File.
@retval EFI_INVALID_PARAMETER File 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.
**/
EFI_STATUS
EFIAPI
ExecuteSecurityHandlers (
IN UINT32 AuthenticationStatus,
IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath
);
/**
The security handler is used to abstracts security-specific functions from the DXE
Foundation of UEFI Image Verification, Trusted Computing Group (TCG) measured boot,
User Identity policy for image loading and consoles, and for purposes of
handling GUIDed section encapsulations.
@param[in] AuthenticationStatus
The authentication status for the input file.
@param[in] File The pointer to the device path of the file that is
being dispatched. This will optionally be used for logging.
@param[in] FileBuffer A pointer to the buffer with the UEFI file image
@param[in] FileSize The size of File buffer.
@param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service.
@retval EFI_SUCCESS The file specified by DevicePath and non-NULL
FileBuffer did authenticate, and the platform policy dictates
that the DXE Foundation may use the file.
@retval EFI_SUCCESS The device path specified by NULL device path DevicePath
and non-NULL FileBuffer did authenticate, and the platform
policy dictates that the DXE Foundation may execute the image in
FileBuffer.
@retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start
UEFI device drivers on the device path specified by DevicePath.
@retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not
authenticate, and the platform policy dictates that the file should be
placed in the untrusted state. The image has been added to the file
execution table.
@retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not
authenticate, and the platform policy dictates that the DXE
Foundation may not use File.
@retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no
permission to start UEFI device drivers on the device path specified
by DevicePath.
@retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load
drivers from the device path specified by DevicePath. The
image has been added into the list of the deferred images.
**/
typedef
EFI_STATUS
(EFIAPI *SECURITY2_FILE_AUTHENTICATION_HANDLER) (
IN UINT32 AuthenticationStatus,
IN CONST EFI_DEVICE_PATH_PROTOCOL *File,
IN VOID *FileBuffer,
IN UINTN FileSize,
IN BOOLEAN BootPolicy
);
/**
Register security measurement handler with its operation type. Different
handlers with the same operation can all be registered.
If SecurityHandler is NULL, then ASSERT().
If no enough resources available to register new handler, then ASSERT().
If AuthenticationOperation is not recongnized, then ASSERT().
If AuthenticationOperation is EFI_AUTH_OPERATION_NONE, then ASSERT().
If the previous register handler can't be executed before the later register handler, then ASSERT().
@param[in] Security2Handler The security measurement service handler to be registered.
@param[in] AuthenticationOperation The operation type is specified for the registered handler.
@retval EFI_SUCCESS The handlers were registered successfully.
**/
EFI_STATUS
EFIAPI
RegisterSecurity2Handler (
IN SECURITY2_FILE_AUTHENTICATION_HANDLER Security2Handler,
IN UINT32 AuthenticationOperation
);
/**
Execute registered handlers based on input AuthenticationOperation until
one returns an error and that error is returned.
If none of the handlers return an error, then EFI_SUCCESS is returned.
The handlers those satisfy AuthenticationOperation will only be executed.
The handlers are executed in same order to their registered order.
@param[in] AuthenticationOperation
The operation type specifies which handlers will be executed.
@param[in] AuthenticationStatus
The authentication status for the input file.
@param[in] File This is a pointer to the device path of the file that is
being dispatched. This will optionally be used for logging.
@param[in] FileBuffer A pointer to the buffer with the UEFI file image
@param[in] FileSize The size of File buffer.
@param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service.
@retval EFI_SUCCESS The file specified by DevicePath and non-NULL
FileBuffer did authenticate, and the platform policy dictates
that the DXE Foundation may use the file.
@retval EFI_SUCCESS The device path specified by NULL device path DevicePath
and non-NULL FileBuffer did authenticate, and the platform
policy dictates that the DXE Foundation may execute the image in
FileBuffer.
@retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start
UEFI device drivers on the device path specified by DevicePath.
@retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not
authenticate, and the platform policy dictates that the file should be
placed in the untrusted state. The image has been added to the file
execution table.
@retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not
authenticate, and the platform policy dictates that the DXE
Foundation may not use File.
@retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no
permission to start UEFI device drivers on the device path specified
by DevicePath.
@retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load
drivers from the device path specified by DevicePath. The
image has been added into the list of the deferred images.
@retval EFI_INVALID_PARAMETER File and FileBuffer are both NULL.
**/
EFI_STATUS
EFIAPI
ExecuteSecurity2Handlers (
IN UINT32 AuthenticationOperation,
IN UINT32 AuthenticationStatus,
IN CONST EFI_DEVICE_PATH_PROTOCOL *File,
IN VOID *FileBuffer,
IN UINTN FileSize,
IN BOOLEAN BootPolicy
);
#endif
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