BCryptDuplicateKey

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

NTSTATUS BCryptDuplicateKey(
    BCRYPT_KEY_HANDLE hKey,
    BCRYPT_KEY_HANDLE* phNewKey,
    BYTE* pbKeyObject,   // optional
    DWORD cbKeyObject,
    DWORD dwFlags
);

<DllImport("bcrypt.dll", ExactSpelling:=True)>
Public Shared Function BCryptDuplicateKey(
    hKey As IntPtr,   ' BCRYPT_KEY_HANDLE
    phNewKey As IntPtr,   ' BCRYPT_KEY_HANDLE* out
    pbKeyObject As IntPtr,   ' BYTE* optional, out
    cbKeyObject As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hKey : BCRYPT_KEY_HANDLE
' phNewKey : BCRYPT_KEY_HANDLE* out
' pbKeyObject : BYTE* optional, out
' cbKeyObject : DWORD
' dwFlags : DWORD
Declare PtrSafe Function BCryptDuplicateKey Lib "bcrypt" ( _
    ByVal hKey As LongPtr, _
    ByVal phNewKey As LongPtr, _
    ByVal pbKeyObject As LongPtr, _
    ByVal cbKeyObject As Long, _
    ByVal dwFlags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

BCryptDuplicateKey = ctypes.windll.bcrypt.BCryptDuplicateKey
BCryptDuplicateKey.restype = ctypes.c_int
BCryptDuplicateKey.argtypes = [
    wintypes.HANDLE,  # hKey : BCRYPT_KEY_HANDLE
    ctypes.c_void_p,  # phNewKey : BCRYPT_KEY_HANDLE* out
    ctypes.POINTER(ctypes.c_ubyte),  # pbKeyObject : BYTE* optional, out
    wintypes.DWORD,  # cbKeyObject : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('bcrypt.dll')
BCryptDuplicateKey = Fiddle::Function.new(
  lib['BCryptDuplicateKey'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : BCRYPT_KEY_HANDLE
    Fiddle::TYPE_VOIDP,  # phNewKey : BCRYPT_KEY_HANDLE* out
    Fiddle::TYPE_VOIDP,  # pbKeyObject : BYTE* optional, out
    -Fiddle::TYPE_INT,  # cbKeyObject : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "bcrypt")]
extern "system" {
    fn BCryptDuplicateKey(
        hKey: *mut core::ffi::c_void,  // BCRYPT_KEY_HANDLE
        phNewKey: *mut *mut core::ffi::c_void,  // BCRYPT_KEY_HANDLE* out
        pbKeyObject: *mut u8,  // BYTE* optional, out
        cbKeyObject: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("bcrypt.dll")]
public static extern int BCryptDuplicateKey(IntPtr hKey, IntPtr phNewKey, IntPtr pbKeyObject, uint cbKeyObject, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'bcrypt_BCryptDuplicateKey' -Namespace Win32 -PassThru
# $api::BCryptDuplicateKey(hKey, phNewKey, pbKeyObject, cbKeyObject, dwFlags)

#uselib "bcrypt.dll"
#func global BCryptDuplicateKey "BCryptDuplicateKey" sptr, sptr, sptr, sptr, sptr
; BCryptDuplicateKey hKey, phNewKey, varptr(pbKeyObject), cbKeyObject, dwFlags   ; 戻り値は stat
; hKey : BCRYPT_KEY_HANDLE -> "sptr"
; phNewKey : BCRYPT_KEY_HANDLE* out -> "sptr"
; pbKeyObject : BYTE* optional, out -> "sptr"
; cbKeyObject : DWORD -> "sptr"
; dwFlags : DWORD -> "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。

#uselib "bcrypt.dll"
#cfunc global BCryptDuplicateKey "BCryptDuplicateKey" sptr, sptr, var, int, int
; res = BCryptDuplicateKey(hKey, phNewKey, pbKeyObject, cbKeyObject, dwFlags)
; hKey : BCRYPT_KEY_HANDLE -> "sptr"
; phNewKey : BCRYPT_KEY_HANDLE* out -> "sptr"
; pbKeyObject : BYTE* optional, out -> "var"
; cbKeyObject : DWORD -> "int"
; dwFlags : DWORD -> "int"
; ※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。

; NTSTATUS BCryptDuplicateKey(BCRYPT_KEY_HANDLE hKey, BCRYPT_KEY_HANDLE* phNewKey, BYTE* pbKeyObject, DWORD cbKeyObject, DWORD dwFlags)
#uselib "bcrypt.dll"
#cfunc global BCryptDuplicateKey "BCryptDuplicateKey" intptr, intptr, var, int, int
; res = BCryptDuplicateKey(hKey, phNewKey, pbKeyObject, cbKeyObject, dwFlags)
; hKey : BCRYPT_KEY_HANDLE -> "intptr"
; phNewKey : BCRYPT_KEY_HANDLE* out -> "intptr"
; pbKeyObject : BYTE* optional, out -> "var"
; cbKeyObject : DWORD -> "int"
; dwFlags : DWORD -> "int"
; ※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。

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

var (
	bcrypt = windows.NewLazySystemDLL("bcrypt.dll")
	procBCryptDuplicateKey = bcrypt.NewProc("BCryptDuplicateKey")
)

// hKey (BCRYPT_KEY_HANDLE), phNewKey (BCRYPT_KEY_HANDLE* out), pbKeyObject (BYTE* optional, out), cbKeyObject (DWORD), dwFlags (DWORD)
r1, _, err := procBCryptDuplicateKey.Call(
	uintptr(hKey),
	uintptr(phNewKey),
	uintptr(pbKeyObject),
	uintptr(cbKeyObject),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // NTSTATUS

function BCryptDuplicateKey(
  hKey: THandle;   // BCRYPT_KEY_HANDLE
  phNewKey: Pointer;   // BCRYPT_KEY_HANDLE* out
  pbKeyObject: Pointer;   // BYTE* optional, out
  cbKeyObject: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptDuplicateKey';

result := DllCall("bcrypt\BCryptDuplicateKey"
    , "Ptr", hKey   ; BCRYPT_KEY_HANDLE
    , "Ptr", phNewKey   ; BCRYPT_KEY_HANDLE* out
    , "Ptr", pbKeyObject   ; BYTE* optional, out
    , "UInt", cbKeyObject   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: NTSTATUS

●BCryptDuplicateKey(hKey, phNewKey, pbKeyObject, cbKeyObject, dwFlags) = DLL("bcrypt.dll", "int BCryptDuplicateKey(void*, void*, void*, dword, dword)")
# 呼び出し: BCryptDuplicateKey(hKey, phNewKey, pbKeyObject, cbKeyObject, dwFlags)
# hKey : BCRYPT_KEY_HANDLE -> "void*"
# phNewKey : BCRYPT_KEY_HANDLE* out -> "void*"
# pbKeyObject : BYTE* optional, out -> "void*"
# cbKeyObject : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# 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)。