NCryptSecretAgreement

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

HRESULT NCryptSecretAgreement(
    NCRYPT_KEY_HANDLE hPrivKey,
    NCRYPT_KEY_HANDLE hPubKey,
    NCRYPT_SECRET_HANDLE* phAgreedSecret,
    NCRYPT_FLAGS dwFlags
);

<DllImport("ncrypt.dll", ExactSpelling:=True)>
Public Shared Function NCryptSecretAgreement(
    hPrivKey As UIntPtr,   ' NCRYPT_KEY_HANDLE
    hPubKey As UIntPtr,   ' NCRYPT_KEY_HANDLE
    <Out> ByRef phAgreedSecret As UIntPtr,   ' NCRYPT_SECRET_HANDLE* out
    dwFlags As UInteger   ' NCRYPT_FLAGS
) As Integer
End Function

' hPrivKey : NCRYPT_KEY_HANDLE
' hPubKey : NCRYPT_KEY_HANDLE
' phAgreedSecret : NCRYPT_SECRET_HANDLE* out
' dwFlags : NCRYPT_FLAGS
Declare PtrSafe Function NCryptSecretAgreement Lib "ncrypt" ( _
    ByVal hPrivKey As LongPtr, _
    ByVal hPubKey As LongPtr, _
    ByRef phAgreedSecret As LongPtr, _
    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

NCryptSecretAgreement = ctypes.windll.ncrypt.NCryptSecretAgreement
NCryptSecretAgreement.restype = ctypes.c_int
NCryptSecretAgreement.argtypes = [
    ctypes.c_size_t,  # hPrivKey : NCRYPT_KEY_HANDLE
    ctypes.c_size_t,  # hPubKey : NCRYPT_KEY_HANDLE
    ctypes.c_void_p,  # phAgreedSecret : NCRYPT_SECRET_HANDLE* out
    wintypes.DWORD,  # dwFlags : NCRYPT_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ncrypt.dll')
NCryptSecretAgreement = Fiddle::Function.new(
  lib['NCryptSecretAgreement'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hPrivKey : NCRYPT_KEY_HANDLE
    Fiddle::TYPE_UINTPTR_T,  # hPubKey : NCRYPT_KEY_HANDLE
    Fiddle::TYPE_VOIDP,  # phAgreedSecret : NCRYPT_SECRET_HANDLE* out
    -Fiddle::TYPE_INT,  # dwFlags : NCRYPT_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "ncrypt")]
extern "system" {
    fn NCryptSecretAgreement(
        hPrivKey: usize,  // NCRYPT_KEY_HANDLE
        hPubKey: usize,  // NCRYPT_KEY_HANDLE
        phAgreedSecret: *mut usize,  // NCRYPT_SECRET_HANDLE* out
        dwFlags: u32  // NCRYPT_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ncrypt.dll")]
public static extern int NCryptSecretAgreement(UIntPtr hPrivKey, UIntPtr hPubKey, out UIntPtr phAgreedSecret, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ncrypt_NCryptSecretAgreement' -Namespace Win32 -PassThru
# $api::NCryptSecretAgreement(hPrivKey, hPubKey, phAgreedSecret, dwFlags)

#uselib "ncrypt.dll"
#func global NCryptSecretAgreement "NCryptSecretAgreement" sptr, sptr, sptr, sptr
; NCryptSecretAgreement hPrivKey, hPubKey, phAgreedSecret, dwFlags   ; 戻り値は stat
; hPrivKey : NCRYPT_KEY_HANDLE -> "sptr"
; hPubKey : NCRYPT_KEY_HANDLE -> "sptr"
; phAgreedSecret : NCRYPT_SECRET_HANDLE* out -> "sptr"
; dwFlags : NCRYPT_FLAGS -> "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 "ncrypt.dll"
#cfunc global NCryptSecretAgreement "NCryptSecretAgreement" sptr, sptr, int, int
; res = NCryptSecretAgreement(hPrivKey, hPubKey, phAgreedSecret, dwFlags)
; hPrivKey : NCRYPT_KEY_HANDLE -> "sptr"
; hPubKey : NCRYPT_KEY_HANDLE -> "sptr"
; phAgreedSecret : NCRYPT_SECRET_HANDLE* out -> "int"
; dwFlags : NCRYPT_FLAGS -> "int"

; HRESULT NCryptSecretAgreement(NCRYPT_KEY_HANDLE hPrivKey, NCRYPT_KEY_HANDLE hPubKey, NCRYPT_SECRET_HANDLE* phAgreedSecret, NCRYPT_FLAGS dwFlags)
#uselib "ncrypt.dll"
#cfunc global NCryptSecretAgreement "NCryptSecretAgreement" intptr, intptr, int, int
; res = NCryptSecretAgreement(hPrivKey, hPubKey, phAgreedSecret, dwFlags)
; hPrivKey : NCRYPT_KEY_HANDLE -> "intptr"
; hPubKey : NCRYPT_KEY_HANDLE -> "intptr"
; phAgreedSecret : NCRYPT_SECRET_HANDLE* out -> "int"
; dwFlags : NCRYPT_FLAGS -> "int"

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

var (
	ncrypt = windows.NewLazySystemDLL("ncrypt.dll")
	procNCryptSecretAgreement = ncrypt.NewProc("NCryptSecretAgreement")
)

// hPrivKey (NCRYPT_KEY_HANDLE), hPubKey (NCRYPT_KEY_HANDLE), phAgreedSecret (NCRYPT_SECRET_HANDLE* out), dwFlags (NCRYPT_FLAGS)
r1, _, err := procNCryptSecretAgreement.Call(
	uintptr(hPrivKey),
	uintptr(hPubKey),
	uintptr(phAgreedSecret),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function NCryptSecretAgreement(
  hPrivKey: NativeUInt;   // NCRYPT_KEY_HANDLE
  hPubKey: NativeUInt;   // NCRYPT_KEY_HANDLE
  phAgreedSecret: Pointer;   // NCRYPT_SECRET_HANDLE* out
  dwFlags: DWORD   // NCRYPT_FLAGS
): Integer; stdcall;
  external 'ncrypt.dll' name 'NCryptSecretAgreement';

result := DllCall("ncrypt\NCryptSecretAgreement"
    , "UPtr", hPrivKey   ; NCRYPT_KEY_HANDLE
    , "UPtr", hPubKey   ; NCRYPT_KEY_HANDLE
    , "Ptr", phAgreedSecret   ; NCRYPT_SECRET_HANDLE* out
    , "UInt", dwFlags   ; NCRYPT_FLAGS
    , "Int")   ; return: HRESULT

●NCryptSecretAgreement(hPrivKey, hPubKey, phAgreedSecret, dwFlags) = DLL("ncrypt.dll", "int NCryptSecretAgreement(int, int, void*, dword)")
# 呼び出し: NCryptSecretAgreement(hPrivKey, hPubKey, phAgreedSecret, dwFlags)
# hPrivKey : NCRYPT_KEY_HANDLE -> "int"
# hPubKey : NCRYPT_KEY_HANDLE -> "int"
# phAgreedSecret : NCRYPT_SECRET_HANDLE* out -> "void*"
# dwFlags : NCRYPT_FLAGS -> "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)。