SslEnumEccCurves

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

HRESULT SslEnumEccCurves(
    NCRYPT_PROV_HANDLE hSslProvider,
    DWORD* pEccCurveCount,
    NCRYPT_SSL_ECC_CURVE** ppEccCurve,
    DWORD dwFlags
);

<DllImport("ncrypt.dll", ExactSpelling:=True)>
Public Shared Function SslEnumEccCurves(
    hSslProvider As UIntPtr,   ' NCRYPT_PROV_HANDLE
    <Out> ByRef pEccCurveCount As UInteger,   ' DWORD* out
    ppEccCurve As IntPtr,   ' NCRYPT_SSL_ECC_CURVE** out
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hSslProvider : NCRYPT_PROV_HANDLE
' pEccCurveCount : DWORD* out
' ppEccCurve : NCRYPT_SSL_ECC_CURVE** out
' dwFlags : DWORD
Declare PtrSafe Function SslEnumEccCurves Lib "ncrypt" ( _
    ByVal hSslProvider As LongPtr, _
    ByRef pEccCurveCount As Long, _
    ByVal ppEccCurve 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

SslEnumEccCurves = ctypes.windll.ncrypt.SslEnumEccCurves
SslEnumEccCurves.restype = ctypes.c_int
SslEnumEccCurves.argtypes = [
    ctypes.c_size_t,  # hSslProvider : NCRYPT_PROV_HANDLE
    ctypes.POINTER(wintypes.DWORD),  # pEccCurveCount : DWORD* out
    ctypes.c_void_p,  # ppEccCurve : NCRYPT_SSL_ECC_CURVE** out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ncrypt.dll')
SslEnumEccCurves = Fiddle::Function.new(
  lib['SslEnumEccCurves'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hSslProvider : NCRYPT_PROV_HANDLE
    Fiddle::TYPE_VOIDP,  # pEccCurveCount : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppEccCurve : NCRYPT_SSL_ECC_CURVE** out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "ncrypt")]
extern "system" {
    fn SslEnumEccCurves(
        hSslProvider: usize,  // NCRYPT_PROV_HANDLE
        pEccCurveCount: *mut u32,  // DWORD* out
        ppEccCurve: *mut *mut NCRYPT_SSL_ECC_CURVE,  // NCRYPT_SSL_ECC_CURVE** out
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ncrypt.dll")]
public static extern int SslEnumEccCurves(UIntPtr hSslProvider, out uint pEccCurveCount, IntPtr ppEccCurve, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ncrypt_SslEnumEccCurves' -Namespace Win32 -PassThru
# $api::SslEnumEccCurves(hSslProvider, pEccCurveCount, ppEccCurve, dwFlags)

#uselib "ncrypt.dll"
#func global SslEnumEccCurves "SslEnumEccCurves" sptr, sptr, sptr, sptr
; SslEnumEccCurves hSslProvider, varptr(pEccCurveCount), varptr(ppEccCurve), dwFlags   ; 戻り値は stat
; hSslProvider : NCRYPT_PROV_HANDLE -> "sptr"
; pEccCurveCount : DWORD* out -> "sptr"
; ppEccCurve : NCRYPT_SSL_ECC_CURVE** out -> "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 "ncrypt.dll"
#cfunc global SslEnumEccCurves "SslEnumEccCurves" sptr, var, var, int
; res = SslEnumEccCurves(hSslProvider, pEccCurveCount, ppEccCurve, dwFlags)
; hSslProvider : NCRYPT_PROV_HANDLE -> "sptr"
; pEccCurveCount : DWORD* out -> "var"
; ppEccCurve : NCRYPT_SSL_ECC_CURVE** out -> "var"
; 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。

; HRESULT SslEnumEccCurves(NCRYPT_PROV_HANDLE hSslProvider, DWORD* pEccCurveCount, NCRYPT_SSL_ECC_CURVE** ppEccCurve, DWORD dwFlags)
#uselib "ncrypt.dll"
#cfunc global SslEnumEccCurves "SslEnumEccCurves" intptr, var, var, int
; res = SslEnumEccCurves(hSslProvider, pEccCurveCount, ppEccCurve, dwFlags)
; hSslProvider : NCRYPT_PROV_HANDLE -> "intptr"
; pEccCurveCount : DWORD* out -> "var"
; ppEccCurve : NCRYPT_SSL_ECC_CURVE** out -> "var"
; 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 (
	ncrypt = windows.NewLazySystemDLL("ncrypt.dll")
	procSslEnumEccCurves = ncrypt.NewProc("SslEnumEccCurves")
)

// hSslProvider (NCRYPT_PROV_HANDLE), pEccCurveCount (DWORD* out), ppEccCurve (NCRYPT_SSL_ECC_CURVE** out), dwFlags (DWORD)
r1, _, err := procSslEnumEccCurves.Call(
	uintptr(hSslProvider),
	uintptr(pEccCurveCount),
	uintptr(ppEccCurve),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SslEnumEccCurves(
  hSslProvider: NativeUInt;   // NCRYPT_PROV_HANDLE
  pEccCurveCount: Pointer;   // DWORD* out
  ppEccCurve: Pointer;   // NCRYPT_SSL_ECC_CURVE** out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'ncrypt.dll' name 'SslEnumEccCurves';

result := DllCall("ncrypt\SslEnumEccCurves"
    , "UPtr", hSslProvider   ; NCRYPT_PROV_HANDLE
    , "Ptr", pEccCurveCount   ; DWORD* out
    , "Ptr", ppEccCurve   ; NCRYPT_SSL_ECC_CURVE** out
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●SslEnumEccCurves(hSslProvider, pEccCurveCount, ppEccCurve, dwFlags) = DLL("ncrypt.dll", "int SslEnumEccCurves(int, void*, void*, dword)")
# 呼び出し: SslEnumEccCurves(hSslProvider, pEccCurveCount, ppEccCurve, dwFlags)
# hSslProvider : NCRYPT_PROV_HANDLE -> "int"
# pEccCurveCount : DWORD* out -> "void*"
# ppEccCurve : NCRYPT_SSL_ECC_CURVE** out -> "void*"
# 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)。