BCryptGenRandom

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

NTSTATUS BCryptGenRandom(
    BCRYPT_ALG_HANDLE hAlgorithm,   // optional
    BYTE* pbBuffer,
    DWORD cbBuffer,
    BCRYPTGENRANDOM_FLAGS dwFlags
);

<DllImport("bcrypt.dll", ExactSpelling:=True)>
Public Shared Function BCryptGenRandom(
    hAlgorithm As IntPtr,   ' BCRYPT_ALG_HANDLE optional
    pbBuffer As IntPtr,   ' BYTE* out
    cbBuffer As UInteger,   ' DWORD
    dwFlags As UInteger   ' BCRYPTGENRANDOM_FLAGS
) As Integer
End Function

' hAlgorithm : BCRYPT_ALG_HANDLE optional
' pbBuffer : BYTE* out
' cbBuffer : DWORD
' dwFlags : BCRYPTGENRANDOM_FLAGS
Declare PtrSafe Function BCryptGenRandom Lib "bcrypt" ( _
    ByVal hAlgorithm As LongPtr, _
    ByVal pbBuffer As LongPtr, _
    ByVal cbBuffer 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

BCryptGenRandom = ctypes.windll.bcrypt.BCryptGenRandom
BCryptGenRandom.restype = ctypes.c_int
BCryptGenRandom.argtypes = [
    wintypes.HANDLE,  # hAlgorithm : BCRYPT_ALG_HANDLE optional
    ctypes.POINTER(ctypes.c_ubyte),  # pbBuffer : BYTE* out
    wintypes.DWORD,  # cbBuffer : DWORD
    wintypes.DWORD,  # dwFlags : BCRYPTGENRANDOM_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('bcrypt.dll')
BCryptGenRandom = Fiddle::Function.new(
  lib['BCryptGenRandom'],
  [
    Fiddle::TYPE_VOIDP,  # hAlgorithm : BCRYPT_ALG_HANDLE optional
    Fiddle::TYPE_VOIDP,  # pbBuffer : BYTE* out
    -Fiddle::TYPE_INT,  # cbBuffer : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : BCRYPTGENRANDOM_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "bcrypt")]
extern "system" {
    fn BCryptGenRandom(
        hAlgorithm: *mut core::ffi::c_void,  // BCRYPT_ALG_HANDLE optional
        pbBuffer: *mut u8,  // BYTE* out
        cbBuffer: u32,  // DWORD
        dwFlags: u32  // BCRYPTGENRANDOM_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "bcrypt.dll"
#func global BCryptGenRandom "BCryptGenRandom" sptr, sptr, sptr, sptr
; BCryptGenRandom hAlgorithm, varptr(pbBuffer), cbBuffer, dwFlags   ; 戻り値は stat
; hAlgorithm : BCRYPT_ALG_HANDLE optional -> "sptr"
; pbBuffer : BYTE* out -> "sptr"
; cbBuffer : DWORD -> "sptr"
; dwFlags : BCRYPTGENRANDOM_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 "bcrypt.dll"
#cfunc global BCryptGenRandom "BCryptGenRandom" sptr, var, int, int
; res = BCryptGenRandom(hAlgorithm, pbBuffer, cbBuffer, dwFlags)
; hAlgorithm : BCRYPT_ALG_HANDLE optional -> "sptr"
; pbBuffer : BYTE* out -> "var"
; cbBuffer : DWORD -> "int"
; dwFlags : BCRYPTGENRANDOM_FLAGS -> "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 BCryptGenRandom(BCRYPT_ALG_HANDLE hAlgorithm, BYTE* pbBuffer, DWORD cbBuffer, BCRYPTGENRANDOM_FLAGS dwFlags)
#uselib "bcrypt.dll"
#cfunc global BCryptGenRandom "BCryptGenRandom" intptr, var, int, int
; res = BCryptGenRandom(hAlgorithm, pbBuffer, cbBuffer, dwFlags)
; hAlgorithm : BCRYPT_ALG_HANDLE optional -> "intptr"
; pbBuffer : BYTE* out -> "var"
; cbBuffer : DWORD -> "int"
; dwFlags : BCRYPTGENRANDOM_FLAGS -> "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")
	procBCryptGenRandom = bcrypt.NewProc("BCryptGenRandom")
)

// hAlgorithm (BCRYPT_ALG_HANDLE optional), pbBuffer (BYTE* out), cbBuffer (DWORD), dwFlags (BCRYPTGENRANDOM_FLAGS)
r1, _, err := procBCryptGenRandom.Call(
	uintptr(hAlgorithm),
	uintptr(pbBuffer),
	uintptr(cbBuffer),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // NTSTATUS

function BCryptGenRandom(
  hAlgorithm: THandle;   // BCRYPT_ALG_HANDLE optional
  pbBuffer: Pointer;   // BYTE* out
  cbBuffer: DWORD;   // DWORD
  dwFlags: DWORD   // BCRYPTGENRANDOM_FLAGS
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptGenRandom';

result := DllCall("bcrypt\BCryptGenRandom"
    , "Ptr", hAlgorithm   ; BCRYPT_ALG_HANDLE optional
    , "Ptr", pbBuffer   ; BYTE* out
    , "UInt", cbBuffer   ; DWORD
    , "UInt", dwFlags   ; BCRYPTGENRANDOM_FLAGS
    , "Int")   ; return: NTSTATUS

●BCryptGenRandom(hAlgorithm, pbBuffer, cbBuffer, dwFlags) = DLL("bcrypt.dll", "int BCryptGenRandom(void*, void*, dword, dword)")
# 呼び出し: BCryptGenRandom(hAlgorithm, pbBuffer, cbBuffer, dwFlags)
# hAlgorithm : BCRYPT_ALG_HANDLE optional -> "void*"
# pbBuffer : BYTE* out -> "void*"
# cbBuffer : DWORD -> "dword"
# dwFlags : BCRYPTGENRANDOM_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)。