ホーム › Security.Credentials › CredUnprotectW

CredUnprotectW

関数

保護された資格情報文字列を復号する。

DLLADVAPI32.dll文字セットUnicode (-W)呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CredUnprotectW(
    BOOL fAsSelf,
    LPWSTR pszProtectedCredentials,
    DWORD cchProtectedCredentials,
    LPWSTR pszCredentials,   // optional
    DWORD* pcchMaxChars
);

パラメーター

名前	型	方向
fAsSelf	BOOL	in
pszProtectedCredentials	LPWSTR	in
cchProtectedCredentials	DWORD	in
pszCredentials	LPWSTR	outoptional
pcchMaxChars	DWORD*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CredUnprotectW(
    BOOL fAsSelf,
    LPWSTR pszProtectedCredentials,
    DWORD cchProtectedCredentials,
    LPWSTR pszCredentials,   // optional
    DWORD* pcchMaxChars
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
static extern bool CredUnprotectW(
    bool fAsSelf,   // BOOL
    [MarshalAs(UnmanagedType.LPWStr)] string pszProtectedCredentials,   // LPWSTR
    uint cchProtectedCredentials,   // DWORD
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszCredentials,   // LPWSTR optional, out
    ref uint pcchMaxChars   // DWORD* in/out
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredUnprotectW(
    fAsSelf As Boolean,   ' BOOL
    <MarshalAs(UnmanagedType.LPWStr)> pszProtectedCredentials As String,   ' LPWSTR
    cchProtectedCredentials As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> pszCredentials As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchMaxChars As UInteger   ' DWORD* in/out
) As Boolean
End Function

' fAsSelf : BOOL
' pszProtectedCredentials : LPWSTR
' cchProtectedCredentials : DWORD
' pszCredentials : LPWSTR optional, out
' pcchMaxChars : DWORD* in/out
Declare PtrSafe Function CredUnprotectW Lib "advapi32" ( _
    ByVal fAsSelf As Long, _
    ByVal pszProtectedCredentials As LongPtr, _
    ByVal cchProtectedCredentials As Long, _
    ByVal pszCredentials As LongPtr, _
    ByRef pcchMaxChars As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CredUnprotectW = ctypes.windll.advapi32.CredUnprotectW
CredUnprotectW.restype = wintypes.BOOL
CredUnprotectW.argtypes = [
    wintypes.BOOL,  # fAsSelf : BOOL
    wintypes.LPCWSTR,  # pszProtectedCredentials : LPWSTR
    wintypes.DWORD,  # cchProtectedCredentials : DWORD
    wintypes.LPWSTR,  # pszCredentials : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxChars : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CredUnprotectW = Fiddle::Function.new(
  lib['CredUnprotectW'],
  [
    Fiddle::TYPE_INT,  # fAsSelf : BOOL
    Fiddle::TYPE_VOIDP,  # pszProtectedCredentials : LPWSTR
    -Fiddle::TYPE_INT,  # cchProtectedCredentials : DWORD
    Fiddle::TYPE_VOIDP,  # pszCredentials : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxChars : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn CredUnprotectW(
        fAsSelf: i32,  // BOOL
        pszProtectedCredentials: *mut u16,  // LPWSTR
        cchProtectedCredentials: u32,  // DWORD
        pszCredentials: *mut u16,  // LPWSTR optional, out
        pcchMaxChars: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CredUnprotectW(bool fAsSelf, [MarshalAs(UnmanagedType.LPWStr)] string pszProtectedCredentials, uint cchProtectedCredentials, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszCredentials, ref uint pcchMaxChars);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CredUnprotectW' -Namespace Win32 -PassThru
# $api::CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, pszCredentials, pcchMaxChars)

#uselib "ADVAPI32.dll"
#func global CredUnprotectW "CredUnprotectW" wptr, wptr, wptr, wptr, wptr
; CredUnprotectW fAsSelf, pszProtectedCredentials, cchProtectedCredentials, varptr(pszCredentials), varptr(pcchMaxChars)   ; 戻り値は stat
; fAsSelf : BOOL -> "wptr"
; pszProtectedCredentials : LPWSTR -> "wptr"
; cchProtectedCredentials : DWORD -> "wptr"
; pszCredentials : LPWSTR optional, out -> "wptr"
; pcchMaxChars : DWORD* in/out -> "wptr"
; ※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 CredUnprotectW "CredUnprotectW" int, wstr, int, var, var
; res = CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, pszCredentials, pcchMaxChars)
; fAsSelf : BOOL -> "int"
; pszProtectedCredentials : LPWSTR -> "wstr"
; cchProtectedCredentials : DWORD -> "int"
; pszCredentials : LPWSTR optional, out -> "var"
; pcchMaxChars : DWORD* in/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 CredUnprotectW "CredUnprotectW" int, wstr, int, sptr, sptr
; res = CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, varptr(pszCredentials), varptr(pcchMaxChars))
; fAsSelf : BOOL -> "int"
; pszProtectedCredentials : LPWSTR -> "wstr"
; cchProtectedCredentials : DWORD -> "int"
; pszCredentials : LPWSTR optional, out -> "sptr"
; pcchMaxChars : DWORD* in/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:

; BOOL CredUnprotectW(BOOL fAsSelf, LPWSTR pszProtectedCredentials, DWORD cchProtectedCredentials, LPWSTR pszCredentials, DWORD* pcchMaxChars)
#uselib "ADVAPI32.dll"
#cfunc global CredUnprotectW "CredUnprotectW" int, wstr, int, var, var
; res = CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, pszCredentials, pcchMaxChars)
; fAsSelf : BOOL -> "int"
; pszProtectedCredentials : LPWSTR -> "wstr"
; cchProtectedCredentials : DWORD -> "int"
; pszCredentials : LPWSTR optional, out -> "var"
; pcchMaxChars : DWORD* in/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。; BOOL CredUnprotectW(BOOL fAsSelf, LPWSTR pszProtectedCredentials, DWORD cchProtectedCredentials, LPWSTR pszCredentials, DWORD* pcchMaxChars)
#uselib "ADVAPI32.dll"
#cfunc global CredUnprotectW "CredUnprotectW" int, wstr, int, intptr, intptr
; res = CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, varptr(pszCredentials), varptr(pcchMaxChars))
; fAsSelf : BOOL -> "int"
; pszProtectedCredentials : LPWSTR -> "wstr"
; cchProtectedCredentials : DWORD -> "int"
; pszCredentials : LPWSTR optional, out -> "intptr"
; pcchMaxChars : DWORD* in/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")
	procCredUnprotectW = advapi32.NewProc("CredUnprotectW")
)

// fAsSelf (BOOL), pszProtectedCredentials (LPWSTR), cchProtectedCredentials (DWORD), pszCredentials (LPWSTR optional, out), pcchMaxChars (DWORD* in/out)
r1, _, err := procCredUnprotectW.Call(
	uintptr(fAsSelf),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszProtectedCredentials))),
	uintptr(cchProtectedCredentials),
	uintptr(pszCredentials),
	uintptr(pcchMaxChars),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredUnprotectW(
  fAsSelf: BOOL;   // BOOL
  pszProtectedCredentials: PWideChar;   // LPWSTR
  cchProtectedCredentials: DWORD;   // DWORD
  pszCredentials: PWideChar;   // LPWSTR optional, out
  pcchMaxChars: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredUnprotectW';

result := DllCall("ADVAPI32\CredUnprotectW"
    , "Int", fAsSelf   ; BOOL
    , "WStr", pszProtectedCredentials   ; LPWSTR
    , "UInt", cchProtectedCredentials   ; DWORD
    , "Ptr", pszCredentials   ; LPWSTR optional, out
    , "Ptr", pcchMaxChars   ; DWORD* in/out
    , "Int")   ; return: BOOL

●CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, pszCredentials, pcchMaxChars) = DLL("ADVAPI32.dll", "bool CredUnprotectW(bool, char*, dword, char*, void*)")
# 呼び出し: CredUnprotectW(fAsSelf, pszProtectedCredentials, cchProtectedCredentials, pszCredentials, pcchMaxChars)
# fAsSelf : BOOL -> "bool"
# pszProtectedCredentials : LPWSTR -> "char*"
# cchProtectedCredentials : DWORD -> "dword"
# pszCredentials : LPWSTR optional, out -> "char*"
# pcchMaxChars : DWORD* in/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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。