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/** @file
Internal file explorer functions for SecureBoot configuration module.
Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "SecureBootConfigImpl.h"
VOID *mStartOpCodeHandle = NULL;
VOID *mEndOpCodeHandle = NULL;
EFI_IFR_GUID_LABEL *mStartLabel = NULL;
EFI_IFR_GUID_LABEL *mEndLabel = NULL;
/**
Refresh the global UpdateData structure.
**/
VOID
RefreshUpdateData (
VOID
)
{
//
// Free current updated date
//
if (mStartOpCodeHandle != NULL) {
HiiFreeOpCodeHandle (mStartOpCodeHandle);
}
//
// Create new OpCode Handle
//
mStartOpCodeHandle = HiiAllocateOpCodeHandle ();
//
// Create Hii Extend Label OpCode as the start opcode
//
mStartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (
mStartOpCodeHandle,
&gEfiIfrTianoGuid,
NULL,
sizeof (EFI_IFR_GUID_LABEL)
);
mStartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
}
/**
Clean up the dynamic opcode at label and form specified by both LabelId.
@param[in] LabelId It is both the Form ID and Label ID for opcode deletion.
@param[in] PrivateData Module private data.
**/
VOID
CleanUpPage (
IN UINT16 LabelId,
IN SECUREBOOT_CONFIG_PRIVATE_DATA *PrivateData
)
{
RefreshUpdateData ();
//
// Remove all op-codes from dynamic page
//
mStartLabel->Number = LabelId;
HiiUpdateForm (
PrivateData->HiiHandle,
&gSecureBootConfigFormSetGuid,
LabelId,
mStartOpCodeHandle, // Label LabelId
mEndOpCodeHandle // LABEL_END
);
}
/**
Extract filename from device path. The returned buffer is allocated using AllocateCopyPool.
The caller is responsible for freeing the allocated buffer using FreePool(). If return NULL
means not enough memory resource.
@param DevicePath Device path.
@retval NULL Not enough memory resource for AllocateCopyPool.
@retval Other A new allocated string that represents the file name.
**/
CHAR16 *
ExtractFileNameFromDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
CHAR16 *String;
CHAR16 *MatchString;
CHAR16 *LastMatch;
CHAR16 *FileName;
UINTN Length;
ASSERT(DevicePath != NULL);
String = DevicePathToStr(DevicePath);
MatchString = String;
LastMatch = String;
FileName = NULL;
while(MatchString != NULL){
LastMatch = MatchString + 1;
MatchString = StrStr(LastMatch,L"\\");
}
Length = StrLen(LastMatch);
FileName = AllocateCopyPool ((Length + 1) * sizeof(CHAR16), LastMatch);
if (FileName != NULL) {
*(FileName + Length) = 0;
}
FreePool(String);
return FileName;
}
/**
Update the form base on the selected file.
@param FilePath Point to the file path.
@param FormId The form need to display.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
UpdatePage(
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN EFI_FORM_ID FormId
)
{
CHAR16 *FileName;
EFI_STRING_ID StringToken;
FileName = NULL;
if (FilePath != NULL) {
FileName = ExtractFileNameFromDevicePath(FilePath);
}
if (FileName == NULL) {
//
// FileName = NULL has two case:
// 1. FilePath == NULL, not select file.
// 2. FilePath != NULL, but ExtractFileNameFromDevicePath return NULL not enough memory resource.
// In these two case, no need to update the form, and exit the caller function.
//
return TRUE;
}
StringToken = HiiSetString (gSecureBootPrivateData->HiiHandle, 0, FileName, NULL);
gSecureBootPrivateData->FileContext->FileName = FileName;
EfiOpenFileByDevicePath (
&FilePath,
&gSecureBootPrivateData->FileContext->FHandle,
EFI_FILE_MODE_READ,
0
);
//
// Create Subtitle op-code for the display string of the option.
//
RefreshUpdateData ();
mStartLabel->Number = FormId;
HiiCreateSubTitleOpCode (
mStartOpCodeHandle,
StringToken,
0,
0,
0
);
HiiUpdateForm (
gSecureBootPrivateData->HiiHandle,
&gSecureBootConfigFormSetGuid,
FormId,
mStartOpCodeHandle, // Label FormId
mEndOpCodeHandle // LABEL_END
);
return TRUE;
}
/**
Update the PK form base on the input file path info.
@param FilePath Point to the file path.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
EFIAPI
UpdatePKFromFile (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
return UpdatePage(FilePath, FORMID_ENROLL_PK_FORM);
}
/**
Update the KEK form base on the input file path info.
@param FilePath Point to the file path.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
EFIAPI
UpdateKEKFromFile (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
return UpdatePage(FilePath, FORMID_ENROLL_KEK_FORM);
}
/**
Update the DB form base on the input file path info.
@param FilePath Point to the file path.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
EFIAPI
UpdateDBFromFile (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
return UpdatePage(FilePath, SECUREBOOT_ENROLL_SIGNATURE_TO_DB);
}
/**
Update the DBX form base on the input file path info.
@param FilePath Point to the file path.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
EFIAPI
UpdateDBXFromFile (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
return UpdatePage(FilePath, SECUREBOOT_ENROLL_SIGNATURE_TO_DBX);
}
/**
Update the DBT form base on the input file path info.
@param FilePath Point to the file path.
@retval TRUE Exit caller function.
@retval FALSE Not exit caller function.
**/
BOOLEAN
EFIAPI
UpdateDBTFromFile (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
return UpdatePage(FilePath, SECUREBOOT_ENROLL_SIGNATURE_TO_DBT);
}
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