ホーム › Storage.FileSystem › GetEncryptedFileMetadata

GetEncryptedFileMetadata

関数

暗号化ファイルのEFSメタデータを取得する。

DLLADVAPI32.dll呼出規約winapi

シグネチャ

// ADVAPI32.dll
#include <windows.h>

DWORD GetEncryptedFileMetadata(
    LPCWSTR lpFileName,
    DWORD* pcbMetadata,
    BYTE** ppbMetadata
);

パラメーター

名前	型	方向
lpFileName	LPCWSTR	in
pcbMetadata	DWORD*	out
ppbMetadata	BYTE**	out

戻り値の型: DWORD

各言語での呼び出し定義

// ADVAPI32.dll
#include <windows.h>

DWORD GetEncryptedFileMetadata(
    LPCWSTR lpFileName,
    DWORD* pcbMetadata,
    BYTE** ppbMetadata
);

[DllImport("ADVAPI32.dll", ExactSpelling = true)]
static extern uint GetEncryptedFileMetadata(
    [MarshalAs(UnmanagedType.LPWStr)] string lpFileName,   // LPCWSTR
    out uint pcbMetadata,   // DWORD* out
    IntPtr ppbMetadata   // BYTE** out
);

<DllImport("ADVAPI32.dll", ExactSpelling:=True)>
Public Shared Function GetEncryptedFileMetadata(
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String,   ' LPCWSTR
    <Out> ByRef pcbMetadata As UInteger,   ' DWORD* out
    ppbMetadata As IntPtr   ' BYTE** out
) As UInteger
End Function

' lpFileName : LPCWSTR
' pcbMetadata : DWORD* out
' ppbMetadata : BYTE** out
Declare PtrSafe Function GetEncryptedFileMetadata Lib "advapi32" ( _
    ByVal lpFileName As LongPtr, _
    ByRef pcbMetadata As Long, _
    ByVal ppbMetadata As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetEncryptedFileMetadata = ctypes.windll.advapi32.GetEncryptedFileMetadata
GetEncryptedFileMetadata.restype = wintypes.DWORD
GetEncryptedFileMetadata.argtypes = [
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # pcbMetadata : DWORD* out
    ctypes.c_void_p,  # ppbMetadata : BYTE** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
GetEncryptedFileMetadata = Fiddle::Function.new(
  lib['GetEncryptedFileMetadata'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pcbMetadata : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppbMetadata : BYTE** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn GetEncryptedFileMetadata(
        lpFileName: *const u16,  // LPCWSTR
        pcbMetadata: *mut u32,  // DWORD* out
        ppbMetadata: *mut *mut u8  // BYTE** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll")]
public static extern uint GetEncryptedFileMetadata([MarshalAs(UnmanagedType.LPWStr)] string lpFileName, out uint pcbMetadata, IntPtr ppbMetadata);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_GetEncryptedFileMetadata' -Namespace Win32 -PassThru
# $api::GetEncryptedFileMetadata(lpFileName, pcbMetadata, ppbMetadata)

#uselib "ADVAPI32.dll"
#func global GetEncryptedFileMetadata "GetEncryptedFileMetadata" sptr, sptr, sptr
; GetEncryptedFileMetadata lpFileName, varptr(pcbMetadata), varptr(ppbMetadata)   ; 戻り値は stat
; lpFileName : LPCWSTR -> "sptr"
; pcbMetadata : DWORD* out -> "sptr"
; ppbMetadata : BYTE** out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "ADVAPI32.dll"
#cfunc global GetEncryptedFileMetadata "GetEncryptedFileMetadata" wstr, var, var
; res = GetEncryptedFileMetadata(lpFileName, pcbMetadata, ppbMetadata)
; lpFileName : LPCWSTR -> "wstr"
; pcbMetadata : DWORD* out -> "var"
; ppbMetadata : BYTE** out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "ADVAPI32.dll"
#cfunc global GetEncryptedFileMetadata "GetEncryptedFileMetadata" wstr, sptr, sptr
; res = GetEncryptedFileMetadata(lpFileName, varptr(pcbMetadata), varptr(ppbMetadata))
; lpFileName : LPCWSTR -> "wstr"
; pcbMetadata : DWORD* out -> "sptr"
; ppbMetadata : BYTE** out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; DWORD GetEncryptedFileMetadata(LPCWSTR lpFileName, DWORD* pcbMetadata, BYTE** ppbMetadata)
#uselib "ADVAPI32.dll"
#cfunc global GetEncryptedFileMetadata "GetEncryptedFileMetadata" wstr, var, var
; res = GetEncryptedFileMetadata(lpFileName, pcbMetadata, ppbMetadata)
; lpFileName : LPCWSTR -> "wstr"
; pcbMetadata : DWORD* out -> "var"
; ppbMetadata : BYTE** out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; DWORD GetEncryptedFileMetadata(LPCWSTR lpFileName, DWORD* pcbMetadata, BYTE** ppbMetadata)
#uselib "ADVAPI32.dll"
#cfunc global GetEncryptedFileMetadata "GetEncryptedFileMetadata" wstr, intptr, intptr
; res = GetEncryptedFileMetadata(lpFileName, varptr(pcbMetadata), varptr(ppbMetadata))
; lpFileName : LPCWSTR -> "wstr"
; pcbMetadata : DWORD* out -> "intptr"
; ppbMetadata : BYTE** out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procGetEncryptedFileMetadata = advapi32.NewProc("GetEncryptedFileMetadata")
)

// lpFileName (LPCWSTR), pcbMetadata (DWORD* out), ppbMetadata (BYTE** out)
r1, _, err := procGetEncryptedFileMetadata.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
	uintptr(pcbMetadata),
	uintptr(ppbMetadata),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetEncryptedFileMetadata(
  lpFileName: PWideChar;   // LPCWSTR
  pcbMetadata: Pointer;   // DWORD* out
  ppbMetadata: Pointer   // BYTE** out
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'GetEncryptedFileMetadata';

result := DllCall("ADVAPI32\GetEncryptedFileMetadata"
    , "WStr", lpFileName   ; LPCWSTR
    , "Ptr", pcbMetadata   ; DWORD* out
    , "Ptr", ppbMetadata   ; BYTE** out
    , "UInt")   ; return: DWORD

●GetEncryptedFileMetadata(lpFileName, pcbMetadata, ppbMetadata) = DLL("ADVAPI32.dll", "dword GetEncryptedFileMetadata(char*, void*, void*)")
# 呼び出し: GetEncryptedFileMetadata(lpFileName, pcbMetadata, ppbMetadata)
# lpFileName : LPCWSTR -> "char*"
# pcbMetadata : DWORD* out -> "void*"
# ppbMetadata : BYTE** out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。