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271 lines
14 KiB
C
271 lines
14 KiB
C
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/** @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 - 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 __SECURITY_MANAGEMENT_LIB_H__
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#define __SECURITY_MANAGEMENT_LIB_H__
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//
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// Authentication Operation defintions for User Identity (UID), Measured and Secure boot.
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//
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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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#define EFI_AUTH_OPERATION_CONNECT_POLICY 0x08
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//
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// Authentication State Operation will check the authentication status of a file.
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//
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#define EFI_AUTH_OPERATION_AUTHENTICATION_STATE 0x10
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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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/**
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The security handler is used to abstracts security-specific functions from the DXE
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Foundation of UEFI Image Verification, Trusted Computing Group (TCG) measured boot,
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User Identity policy for image loading and consoles, and for purposes of
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handling GUIDed section encapsulations.
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@param[in] AuthenticationStatus
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The authentication status 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 A pointer to the buffer with the UEFI file image
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@param[in] FileSize The size of File buffer.
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@param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service.
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@retval EFI_SUCCESS The file specified by DevicePath and non-NULL
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FileBuffer did authenticate, and the platform policy dictates
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that the DXE Foundation may use the file.
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@retval EFI_SUCCESS The device path specified by NULL device path DevicePath
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and non-NULL FileBuffer did authenticate, and the platform
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policy dictates that the DXE Foundation may execute the image in
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FileBuffer.
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@retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start
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UEFI device drivers on the device path specified by DevicePath.
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@retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not
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authenticate, and the platform policy dictates that the file should be
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placed in the untrusted state. The image has been added to the file
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execution table.
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@retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not
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authenticate, and the platform policy dictates that the DXE
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Foundation may not use File.
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@retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no
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permission to start UEFI device drivers on the device path specified
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by DevicePath.
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@retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load
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drivers from the device path specified by DevicePath. The
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image has been added into the list of the deferred images.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *SECURITY2_FILE_AUTHENTICATION_HANDLER) (
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IN 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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IN BOOLEAN BootPolicy
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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 AuthenticationOperation is EFI_AUTH_OPERATION_NONE, 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] Security2Handler The security measurement service handler to be registered.
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@param[in] AuthenticationOperation The operation 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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RegisterSecurity2Handler (
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IN SECURITY2_FILE_AUTHENTICATION_HANDLER Security2Handler,
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IN UINT32 AuthenticationOperation
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);
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/**
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Execute registered handlers based on input AuthenticationOperation until
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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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The handlers those satisfy AuthenticationOperation will only be executed.
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The handlers are executed in same order to their registered order.
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@param[in] AuthenticationOperation
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The operation type specifies which handlers will be executed.
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@param[in] AuthenticationStatus
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The authentication status for the input file.
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@param[in] 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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@param[in] FileBuffer A pointer to the buffer with the UEFI file image
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@param[in] FileSize The size of File buffer.
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@param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service.
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@retval EFI_SUCCESS The file specified by DevicePath and non-NULL
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FileBuffer did authenticate, and the platform policy dictates
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that the DXE Foundation may use the file.
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@retval EFI_SUCCESS The device path specified by NULL device path DevicePath
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and non-NULL FileBuffer did authenticate, and the platform
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policy dictates that the DXE Foundation may execute the image in
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FileBuffer.
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@retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start
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UEFI device drivers on the device path specified by DevicePath.
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@retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not
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authenticate, and the platform policy dictates that the file should be
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placed in the untrusted state. The image has been added to the file
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execution table.
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@retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not
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authenticate, and the platform policy dictates that the DXE
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Foundation may not use File.
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@retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no
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permission to start UEFI device drivers on the device path specified
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by DevicePath.
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@retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load
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drivers from the device path specified by DevicePath. The
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image has been added into the list of the deferred images.
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@retval EFI_INVALID_PARAMETER File and FileBuffer are both NULL.
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**/
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EFI_STATUS
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EFIAPI
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ExecuteSecurity2Handlers (
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IN UINT32 AuthenticationOperation,
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IN 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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IN BOOLEAN BootPolicy
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);
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#endif
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