BCryptGenerateKeyPair

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

NTSTATUS BCryptGenerateKeyPair(
    BCRYPT_ALG_HANDLE hAlgorithm,
    BCRYPT_KEY_HANDLE* phKey,
    DWORD dwLength,
    DWORD dwFlags
);

<DllImport("bcrypt.dll", ExactSpelling:=True)>
Public Shared Function BCryptGenerateKeyPair(
    hAlgorithm As IntPtr,   ' BCRYPT_ALG_HANDLE in/out
    phKey As IntPtr,   ' BCRYPT_KEY_HANDLE* out
    dwLength As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hAlgorithm : BCRYPT_ALG_HANDLE in/out
' phKey : BCRYPT_KEY_HANDLE* out
' dwLength : DWORD
' dwFlags : DWORD
Declare PtrSafe Function BCryptGenerateKeyPair Lib "bcrypt" ( _
    ByVal hAlgorithm As LongPtr, _
    ByVal phKey As LongPtr, _
    ByVal dwLength 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

BCryptGenerateKeyPair = ctypes.windll.bcrypt.BCryptGenerateKeyPair
BCryptGenerateKeyPair.restype = ctypes.c_int
BCryptGenerateKeyPair.argtypes = [
    wintypes.HANDLE,  # hAlgorithm : BCRYPT_ALG_HANDLE in/out
    ctypes.c_void_p,  # phKey : BCRYPT_KEY_HANDLE* out
    wintypes.DWORD,  # dwLength : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('bcrypt.dll')
BCryptGenerateKeyPair = Fiddle::Function.new(
  lib['BCryptGenerateKeyPair'],
  [
    Fiddle::TYPE_VOIDP,  # hAlgorithm : BCRYPT_ALG_HANDLE in/out
    Fiddle::TYPE_VOIDP,  # phKey : BCRYPT_KEY_HANDLE* out
    -Fiddle::TYPE_INT,  # dwLength : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "bcrypt")]
extern "system" {
    fn BCryptGenerateKeyPair(
        hAlgorithm: *mut core::ffi::c_void,  // BCRYPT_ALG_HANDLE in/out
        phKey: *mut *mut core::ffi::c_void,  // BCRYPT_KEY_HANDLE* out
        dwLength: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("bcrypt.dll")]
public static extern int BCryptGenerateKeyPair(IntPtr hAlgorithm, IntPtr phKey, uint dwLength, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'bcrypt_BCryptGenerateKeyPair' -Namespace Win32 -PassThru
# $api::BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)

#uselib "bcrypt.dll"
#func global BCryptGenerateKeyPair "BCryptGenerateKeyPair" sptr, sptr, sptr, sptr
; BCryptGenerateKeyPair hAlgorithm, phKey, dwLength, dwFlags   ; 戻り値は stat
; hAlgorithm : BCRYPT_ALG_HANDLE in/out -> "sptr"
; phKey : BCRYPT_KEY_HANDLE* out -> "sptr"
; dwLength : 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 BCryptGenerateKeyPair "BCryptGenerateKeyPair" sptr, sptr, int, int
; res = BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
; hAlgorithm : BCRYPT_ALG_HANDLE in/out -> "sptr"
; phKey : BCRYPT_KEY_HANDLE* out -> "sptr"
; dwLength : DWORD -> "int"
; dwFlags : DWORD -> "int"

; NTSTATUS BCryptGenerateKeyPair(BCRYPT_ALG_HANDLE hAlgorithm, BCRYPT_KEY_HANDLE* phKey, DWORD dwLength, DWORD dwFlags)
#uselib "bcrypt.dll"
#cfunc global BCryptGenerateKeyPair "BCryptGenerateKeyPair" intptr, intptr, int, int
; res = BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
; hAlgorithm : BCRYPT_ALG_HANDLE in/out -> "intptr"
; phKey : BCRYPT_KEY_HANDLE* out -> "intptr"
; dwLength : DWORD -> "int"
; dwFlags : DWORD -> "int"

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

var (
	bcrypt = windows.NewLazySystemDLL("bcrypt.dll")
	procBCryptGenerateKeyPair = bcrypt.NewProc("BCryptGenerateKeyPair")
)

// hAlgorithm (BCRYPT_ALG_HANDLE in/out), phKey (BCRYPT_KEY_HANDLE* out), dwLength (DWORD), dwFlags (DWORD)
r1, _, err := procBCryptGenerateKeyPair.Call(
	uintptr(hAlgorithm),
	uintptr(phKey),
	uintptr(dwLength),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // NTSTATUS

function BCryptGenerateKeyPair(
  hAlgorithm: THandle;   // BCRYPT_ALG_HANDLE in/out
  phKey: Pointer;   // BCRYPT_KEY_HANDLE* out
  dwLength: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptGenerateKeyPair';

result := DllCall("bcrypt\BCryptGenerateKeyPair"
    , "Ptr", hAlgorithm   ; BCRYPT_ALG_HANDLE in/out
    , "Ptr", phKey   ; BCRYPT_KEY_HANDLE* out
    , "UInt", dwLength   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: NTSTATUS

●BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags) = DLL("bcrypt.dll", "int BCryptGenerateKeyPair(void*, void*, dword, dword)")
# 呼び出し: BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
# hAlgorithm : BCRYPT_ALG_HANDLE in/out -> "void*"
# phKey : BCRYPT_KEY_HANDLE* out -> "void*"
# dwLength : 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)。

const std = @import("std");

extern "bcrypt" fn BCryptGenerateKeyPair(
    hAlgorithm: ?*anyopaque, // BCRYPT_ALG_HANDLE in/out
    phKey: ?*anyopaque, // BCRYPT_KEY_HANDLE* out
    dwLength: u32, // DWORD
    dwFlags: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;

proc BCryptGenerateKeyPair(
    hAlgorithm: pointer,  # BCRYPT_ALG_HANDLE in/out
    phKey: pointer,  # BCRYPT_KEY_HANDLE* out
    dwLength: uint32,  # DWORD
    dwFlags: uint32  # DWORD
): int32 {.importc: "BCryptGenerateKeyPair", stdcall, dynlib: "bcrypt.dll".}

pragma(lib, "bcrypt");
extern(Windows)
int BCryptGenerateKeyPair(
    void* hAlgorithm,   // BCRYPT_ALG_HANDLE in/out
    void* phKey,   // BCRYPT_KEY_HANDLE* out
    uint dwLength,   // DWORD
    uint dwFlags   // DWORD
);

ccall((:BCryptGenerateKeyPair, "bcrypt.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, UInt32, UInt32),
      hAlgorithm, phKey, dwLength, dwFlags)
# hAlgorithm : BCRYPT_ALG_HANDLE in/out -> Ptr{Cvoid}
# phKey : BCRYPT_KEY_HANDLE* out -> Ptr{Cvoid}
# dwLength : DWORD -> UInt32
# dwFlags : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t BCryptGenerateKeyPair(
    void* hAlgorithm,
    void* phKey,
    uint32_t dwLength,
    uint32_t dwFlags);
]]
local bcrypt = ffi.load("bcrypt")
-- bcrypt.BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
-- hAlgorithm : BCRYPT_ALG_HANDLE in/out
-- phKey : BCRYPT_KEY_HANDLE* out
-- dwLength : DWORD
-- dwFlags : DWORD
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('bcrypt.dll');
const BCryptGenerateKeyPair = lib.func('__stdcall', 'BCryptGenerateKeyPair', 'int32_t', ['void *', 'void *', 'uint32_t', 'uint32_t']);
// BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
// hAlgorithm : BCRYPT_ALG_HANDLE in/out -> 'void *'
// phKey : BCRYPT_KEY_HANDLE* out -> 'void *'
// dwLength : DWORD -> 'uint32_t'
// dwFlags : DWORD -> 'uint32_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("bcrypt.dll", {
  BCryptGenerateKeyPair: { parameters: ["pointer", "pointer", "u32", "u32"], result: "i32" },
});
// lib.symbols.BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags)
// hAlgorithm : BCRYPT_ALG_HANDLE in/out -> "pointer"
// phKey : BCRYPT_KEY_HANDLE* out -> "pointer"
// dwLength : DWORD -> "u32"
// dwFlags : DWORD -> "u32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t BCryptGenerateKeyPair(
    void* hAlgorithm,
    void* phKey,
    uint32_t dwLength,
    uint32_t dwFlags);
C, "bcrypt.dll");
// $ffi->BCryptGenerateKeyPair(hAlgorithm, phKey, dwLength, dwFlags);
// hAlgorithm : BCRYPT_ALG_HANDLE in/out
// phKey : BCRYPT_KEY_HANDLE* out
// dwLength : DWORD
// dwFlags : DWORD
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Bcrypt extends StdCallLibrary {
    Bcrypt INSTANCE = Native.load("bcrypt", Bcrypt.class);
    int BCryptGenerateKeyPair(
        Pointer hAlgorithm,   // BCRYPT_ALG_HANDLE in/out
        Pointer phKey,   // BCRYPT_KEY_HANDLE* out
        int dwLength,   // DWORD
        int dwFlags   // DWORD
    );
}

@[Link("bcrypt")]
lib Libbcrypt
  fun BCryptGenerateKeyPair = BCryptGenerateKeyPair(
    hAlgorithm : Void*,   # BCRYPT_ALG_HANDLE in/out
    phKey : Void*,   # BCRYPT_KEY_HANDLE* out
    dwLength : UInt32,   # DWORD
    dwFlags : UInt32   # DWORD
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef BCryptGenerateKeyPairNative = Int32 Function(Pointer<Void>, Pointer<Void>, Uint32, Uint32);
typedef BCryptGenerateKeyPairDart = int Function(Pointer<Void>, Pointer<Void>, int, int);
final BCryptGenerateKeyPair = DynamicLibrary.open('bcrypt.dll')
    .lookupFunction<BCryptGenerateKeyPairNative, BCryptGenerateKeyPairDart>('BCryptGenerateKeyPair');
// hAlgorithm : BCRYPT_ALG_HANDLE in/out -> Pointer<Void>
// phKey : BCRYPT_KEY_HANDLE* out -> Pointer<Void>
// dwLength : DWORD -> Uint32
// dwFlags : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function BCryptGenerateKeyPair(
  hAlgorithm: THandle;   // BCRYPT_ALG_HANDLE in/out
  phKey: Pointer;   // BCRYPT_KEY_HANDLE* out
  dwLength: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptGenerateKeyPair';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "BCryptGenerateKeyPair"
  c_BCryptGenerateKeyPair :: Ptr () -> Ptr () -> Word32 -> Word32 -> IO Int32
-- hAlgorithm : BCRYPT_ALG_HANDLE in/out -> Ptr ()
-- phKey : BCRYPT_KEY_HANDLE* out -> Ptr ()
-- dwLength : DWORD -> Word32
-- dwFlags : DWORD -> Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let bcryptgeneratekeypair =
  foreign "BCryptGenerateKeyPair"
    ((ptr void) @-> (ptr void) @-> uint32_t @-> uint32_t @-> returning int32_t)
(* hAlgorithm : BCRYPT_ALG_HANDLE in/out -> (ptr void) *)
(* phKey : BCRYPT_KEY_HANDLE* out -> (ptr void) *)
(* dwLength : DWORD -> uint32_t *)
(* dwFlags : DWORD -> uint32_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library bcrypt (t "bcrypt.dll"))
(cffi:use-foreign-library bcrypt)

(cffi:defcfun ("BCryptGenerateKeyPair" bcrypt-generate-key-pair :convention :stdcall) :int32
  (h-algorithm :pointer)   ; BCRYPT_ALG_HANDLE in/out
  (ph-key :pointer)   ; BCRYPT_KEY_HANDLE* out
  (dw-length :uint32)   ; DWORD
  (dw-flags :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $BCryptGenerateKeyPair = Win32::API::More->new('bcrypt',
    'int BCryptGenerateKeyPair(HANDLE hAlgorithm, HANDLE phKey, DWORD dwLength, DWORD dwFlags)');
# my $ret = $BCryptGenerateKeyPair->Call($hAlgorithm, $phKey, $dwLength, $dwFlags);
# hAlgorithm : BCRYPT_ALG_HANDLE in/out -> HANDLE
# phKey : BCRYPT_KEY_HANDLE* out -> HANDLE
# dwLength : DWORD -> DWORD
# dwFlags : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。