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BCryptQueryContextFunctionConfiguration

関数
CNGコンテキストの指定機能の構成情報を取得する。
DLLbcrypt.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

NTSTATUS BCryptQueryContextFunctionConfiguration(
    BCRYPT_TABLE dwTable,
    LPCWSTR pszContext,
    BCRYPT_INTERFACE dwInterface,
    LPCWSTR pszFunction,
    DWORD* pcbBuffer,
    CRYPT_CONTEXT_FUNCTION_CONFIG** ppBuffer   // optional
);

パラメーター

名前方向説明
dwTableBCRYPT_TABLEin対象の構成テーブル(BCRYPT_TABLE)。
pszContextLPCWSTRin関数構成を問い合わせるコンテキストの識別名。
dwInterfaceBCRYPT_INTERFACEin対象インターフェイス(BCRYPT_INTERFACE)。
pszFunctionLPCWSTRin問い合わせる暗号機能(アルゴリズム)の名前。
pcbBufferDWORD*inout入力時はバッファサイズ、出力時は必要サイズを保持するポインタ。
ppBufferCRYPT_CONTEXT_FUNCTION_CONFIG**outoptional機能構成(CRYPT_CONTEXT_FUNCTION_CONFIG)を受け取るポインタ。BCryptFreeBufferで解放する。

戻り値の型: NTSTATUS

各言語での呼び出し定義

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

NTSTATUS BCryptQueryContextFunctionConfiguration(
    BCRYPT_TABLE dwTable,
    LPCWSTR pszContext,
    BCRYPT_INTERFACE dwInterface,
    LPCWSTR pszFunction,
    DWORD* pcbBuffer,
    CRYPT_CONTEXT_FUNCTION_CONFIG** ppBuffer   // optional
);
[DllImport("bcrypt.dll", ExactSpelling = true)]
static extern int BCryptQueryContextFunctionConfiguration(
    uint dwTable,   // BCRYPT_TABLE
    [MarshalAs(UnmanagedType.LPWStr)] string pszContext,   // LPCWSTR
    uint dwInterface,   // BCRYPT_INTERFACE
    [MarshalAs(UnmanagedType.LPWStr)] string pszFunction,   // LPCWSTR
    ref uint pcbBuffer,   // DWORD* in/out
    IntPtr ppBuffer   // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
);
<DllImport("bcrypt.dll", ExactSpelling:=True)>
Public Shared Function BCryptQueryContextFunctionConfiguration(
    dwTable As UInteger,   ' BCRYPT_TABLE
    <MarshalAs(UnmanagedType.LPWStr)> pszContext As String,   ' LPCWSTR
    dwInterface As UInteger,   ' BCRYPT_INTERFACE
    <MarshalAs(UnmanagedType.LPWStr)> pszFunction As String,   ' LPCWSTR
    ByRef pcbBuffer As UInteger,   ' DWORD* in/out
    ppBuffer As IntPtr   ' CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
) As Integer
End Function
' dwTable : BCRYPT_TABLE
' pszContext : LPCWSTR
' dwInterface : BCRYPT_INTERFACE
' pszFunction : LPCWSTR
' pcbBuffer : DWORD* in/out
' ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
Declare PtrSafe Function BCryptQueryContextFunctionConfiguration Lib "bcrypt" ( _
    ByVal dwTable As Long, _
    ByVal pszContext As LongPtr, _
    ByVal dwInterface As Long, _
    ByVal pszFunction As LongPtr, _
    ByRef pcbBuffer As Long, _
    ByVal ppBuffer As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。
import ctypes
from ctypes import wintypes

BCryptQueryContextFunctionConfiguration = ctypes.windll.bcrypt.BCryptQueryContextFunctionConfiguration
BCryptQueryContextFunctionConfiguration.restype = ctypes.c_int
BCryptQueryContextFunctionConfiguration.argtypes = [
    wintypes.DWORD,  # dwTable : BCRYPT_TABLE
    wintypes.LPCWSTR,  # pszContext : LPCWSTR
    wintypes.DWORD,  # dwInterface : BCRYPT_INTERFACE
    wintypes.LPCWSTR,  # pszFunction : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # pcbBuffer : DWORD* in/out
    ctypes.c_void_p,  # ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('bcrypt.dll')
BCryptQueryContextFunctionConfiguration = Fiddle::Function.new(
  lib['BCryptQueryContextFunctionConfiguration'],
  [
    -Fiddle::TYPE_INT,  # dwTable : BCRYPT_TABLE
    Fiddle::TYPE_VOIDP,  # pszContext : LPCWSTR
    -Fiddle::TYPE_INT,  # dwInterface : BCRYPT_INTERFACE
    Fiddle::TYPE_VOIDP,  # pszFunction : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pcbBuffer : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
  ],
  Fiddle::TYPE_INT)
#[link(name = "bcrypt")]
extern "system" {
    fn BCryptQueryContextFunctionConfiguration(
        dwTable: u32,  // BCRYPT_TABLE
        pszContext: *const u16,  // LPCWSTR
        dwInterface: u32,  // BCRYPT_INTERFACE
        pszFunction: *const u16,  // LPCWSTR
        pcbBuffer: *mut u32,  // DWORD* in/out
        ppBuffer: *mut *mut CRYPT_CONTEXT_FUNCTION_CONFIG  // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("bcrypt.dll")]
public static extern int BCryptQueryContextFunctionConfiguration(uint dwTable, [MarshalAs(UnmanagedType.LPWStr)] string pszContext, uint dwInterface, [MarshalAs(UnmanagedType.LPWStr)] string pszFunction, ref uint pcbBuffer, IntPtr ppBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'bcrypt_BCryptQueryContextFunctionConfiguration' -Namespace Win32 -PassThru
# $api::BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
#uselib "bcrypt.dll"
#func global BCryptQueryContextFunctionConfiguration "BCryptQueryContextFunctionConfiguration" sptr, sptr, sptr, sptr, sptr, sptr
; BCryptQueryContextFunctionConfiguration dwTable, pszContext, dwInterface, pszFunction, varptr(pcbBuffer), varptr(ppBuffer)   ; 戻り値は stat
; dwTable : BCRYPT_TABLE -> "sptr"
; pszContext : LPCWSTR -> "sptr"
; dwInterface : BCRYPT_INTERFACE -> "sptr"
; pszFunction : LPCWSTR -> "sptr"
; pcbBuffer : DWORD* in/out -> "sptr"
; ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> "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。
出力引数:
#uselib "bcrypt.dll"
#cfunc global BCryptQueryContextFunctionConfiguration "BCryptQueryContextFunctionConfiguration" int, wstr, int, wstr, var, var
; res = BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
; dwTable : BCRYPT_TABLE -> "int"
; pszContext : LPCWSTR -> "wstr"
; dwInterface : BCRYPT_INTERFACE -> "int"
; pszFunction : LPCWSTR -> "wstr"
; pcbBuffer : DWORD* in/out -> "var"
; ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> "var"
; ※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。
出力引数:
; NTSTATUS BCryptQueryContextFunctionConfiguration(BCRYPT_TABLE dwTable, LPCWSTR pszContext, BCRYPT_INTERFACE dwInterface, LPCWSTR pszFunction, DWORD* pcbBuffer, CRYPT_CONTEXT_FUNCTION_CONFIG** ppBuffer)
#uselib "bcrypt.dll"
#cfunc global BCryptQueryContextFunctionConfiguration "BCryptQueryContextFunctionConfiguration" int, wstr, int, wstr, var, var
; res = BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
; dwTable : BCRYPT_TABLE -> "int"
; pszContext : LPCWSTR -> "wstr"
; dwInterface : BCRYPT_INTERFACE -> "int"
; pszFunction : LPCWSTR -> "wstr"
; pcbBuffer : DWORD* in/out -> "var"
; ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> "var"
; ※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")
	procBCryptQueryContextFunctionConfiguration = bcrypt.NewProc("BCryptQueryContextFunctionConfiguration")
)

// dwTable (BCRYPT_TABLE), pszContext (LPCWSTR), dwInterface (BCRYPT_INTERFACE), pszFunction (LPCWSTR), pcbBuffer (DWORD* in/out), ppBuffer (CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out)
r1, _, err := procBCryptQueryContextFunctionConfiguration.Call(
	uintptr(dwTable),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszContext))),
	uintptr(dwInterface),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszFunction))),
	uintptr(pcbBuffer),
	uintptr(ppBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // NTSTATUS
function BCryptQueryContextFunctionConfiguration(
  dwTable: DWORD;   // BCRYPT_TABLE
  pszContext: PWideChar;   // LPCWSTR
  dwInterface: DWORD;   // BCRYPT_INTERFACE
  pszFunction: PWideChar;   // LPCWSTR
  pcbBuffer: Pointer;   // DWORD* in/out
  ppBuffer: Pointer   // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptQueryContextFunctionConfiguration';
result := DllCall("bcrypt\BCryptQueryContextFunctionConfiguration"
    , "UInt", dwTable   ; BCRYPT_TABLE
    , "WStr", pszContext   ; LPCWSTR
    , "UInt", dwInterface   ; BCRYPT_INTERFACE
    , "WStr", pszFunction   ; LPCWSTR
    , "Ptr", pcbBuffer   ; DWORD* in/out
    , "Ptr", ppBuffer   ; CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
    , "Int")   ; return: NTSTATUS
●BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer) = DLL("bcrypt.dll", "int BCryptQueryContextFunctionConfiguration(dword, char*, dword, char*, void*, void*)")
# 呼び出し: BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
# dwTable : BCRYPT_TABLE -> "dword"
# pszContext : LPCWSTR -> "char*"
# dwInterface : BCRYPT_INTERFACE -> "dword"
# pszFunction : LPCWSTR -> "char*"
# pcbBuffer : DWORD* in/out -> "void*"
# ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> "void*"
# 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 BCryptQueryContextFunctionConfiguration(
    dwTable: u32, // BCRYPT_TABLE
    pszContext: [*c]const u16, // LPCWSTR
    dwInterface: u32, // BCRYPT_INTERFACE
    pszFunction: [*c]const u16, // LPCWSTR
    pcbBuffer: [*c]u32, // DWORD* in/out
    ppBuffer: [*c][*c]CRYPT_CONTEXT_FUNCTION_CONFIG // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
) callconv(std.os.windows.WINAPI) i32;
proc BCryptQueryContextFunctionConfiguration(
    dwTable: uint32,  # BCRYPT_TABLE
    pszContext: WideCString,  # LPCWSTR
    dwInterface: uint32,  # BCRYPT_INTERFACE
    pszFunction: WideCString,  # LPCWSTR
    pcbBuffer: ptr uint32,  # DWORD* in/out
    ppBuffer: ptr CRYPT_CONTEXT_FUNCTION_CONFIG  # CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
): int32 {.importc: "BCryptQueryContextFunctionConfiguration", stdcall, dynlib: "bcrypt.dll".}
pragma(lib, "bcrypt");
extern(Windows)
int BCryptQueryContextFunctionConfiguration(
    uint dwTable,   // BCRYPT_TABLE
    const(wchar)* pszContext,   // LPCWSTR
    uint dwInterface,   // BCRYPT_INTERFACE
    const(wchar)* pszFunction,   // LPCWSTR
    uint* pcbBuffer,   // DWORD* in/out
    CRYPT_CONTEXT_FUNCTION_CONFIG** ppBuffer   // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
);
ccall((:BCryptQueryContextFunctionConfiguration, "bcrypt.dll"), stdcall, Int32,
      (UInt32, Cwstring, UInt32, Cwstring, Ptr{UInt32}, Ptr{CRYPT_CONTEXT_FUNCTION_CONFIG}),
      dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
# dwTable : BCRYPT_TABLE -> UInt32
# pszContext : LPCWSTR -> Cwstring
# dwInterface : BCRYPT_INTERFACE -> UInt32
# pszFunction : LPCWSTR -> Cwstring
# pcbBuffer : DWORD* in/out -> Ptr{UInt32}
# ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> Ptr{CRYPT_CONTEXT_FUNCTION_CONFIG}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t BCryptQueryContextFunctionConfiguration(
    uint32_t dwTable,
    const uint16_t* pszContext,
    uint32_t dwInterface,
    const uint16_t* pszFunction,
    uint32_t* pcbBuffer,
    void* ppBuffer);
]]
local bcrypt = ffi.load("bcrypt")
-- bcrypt.BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
-- dwTable : BCRYPT_TABLE
-- pszContext : LPCWSTR
-- dwInterface : BCRYPT_INTERFACE
-- pszFunction : LPCWSTR
-- pcbBuffer : DWORD* in/out
-- ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
-- 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 BCryptQueryContextFunctionConfiguration = lib.func('__stdcall', 'BCryptQueryContextFunctionConfiguration', 'int32_t', ['uint32_t', 'str16', 'uint32_t', 'str16', 'uint32_t *', 'void *']);
// BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
// dwTable : BCRYPT_TABLE -> 'uint32_t'
// pszContext : LPCWSTR -> 'str16'
// dwInterface : BCRYPT_INTERFACE -> 'uint32_t'
// pszFunction : LPCWSTR -> 'str16'
// pcbBuffer : DWORD* in/out -> 'uint32_t *'
// ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> 'void *'
// 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", {
  BCryptQueryContextFunctionConfiguration: { parameters: ["u32", "buffer", "u32", "buffer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer)
// dwTable : BCRYPT_TABLE -> "u32"
// pszContext : LPCWSTR -> "buffer"
// dwInterface : BCRYPT_INTERFACE -> "u32"
// pszFunction : LPCWSTR -> "buffer"
// pcbBuffer : DWORD* in/out -> "pointer"
// ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> "pointer"
// 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 BCryptQueryContextFunctionConfiguration(
    uint32_t dwTable,
    const uint16_t* pszContext,
    uint32_t dwInterface,
    const uint16_t* pszFunction,
    uint32_t* pcbBuffer,
    void* ppBuffer);
C, "bcrypt.dll");
// $ffi->BCryptQueryContextFunctionConfiguration(dwTable, pszContext, dwInterface, pszFunction, pcbBuffer, ppBuffer);
// dwTable : BCRYPT_TABLE
// pszContext : LPCWSTR
// dwInterface : BCRYPT_INTERFACE
// pszFunction : LPCWSTR
// pcbBuffer : DWORD* in/out
// ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
// 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 BCryptQueryContextFunctionConfiguration(
        int dwTable,   // BCRYPT_TABLE
        WString pszContext,   // LPCWSTR
        int dwInterface,   // BCRYPT_INTERFACE
        WString pszFunction,   // LPCWSTR
        IntByReference pcbBuffer,   // DWORD* in/out
        Pointer ppBuffer   // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
    );
}
@[Link("bcrypt")]
lib Libbcrypt
  fun BCryptQueryContextFunctionConfiguration = BCryptQueryContextFunctionConfiguration(
    dwTable : UInt32,   # BCRYPT_TABLE
    pszContext : UInt16*,   # LPCWSTR
    dwInterface : UInt32,   # BCRYPT_INTERFACE
    pszFunction : UInt16*,   # LPCWSTR
    pcbBuffer : UInt32*,   # DWORD* in/out
    ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG**   # CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
  ) : 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 BCryptQueryContextFunctionConfigurationNative = Int32 Function(Uint32, Pointer<Utf16>, Uint32, Pointer<Utf16>, Pointer<Uint32>, Pointer<Void>);
typedef BCryptQueryContextFunctionConfigurationDart = int Function(int, Pointer<Utf16>, int, Pointer<Utf16>, Pointer<Uint32>, Pointer<Void>);
final BCryptQueryContextFunctionConfiguration = DynamicLibrary.open('bcrypt.dll')
    .lookupFunction<BCryptQueryContextFunctionConfigurationNative, BCryptQueryContextFunctionConfigurationDart>('BCryptQueryContextFunctionConfiguration');
// dwTable : BCRYPT_TABLE -> Uint32
// pszContext : LPCWSTR -> Pointer<Utf16>
// dwInterface : BCRYPT_INTERFACE -> Uint32
// pszFunction : LPCWSTR -> Pointer<Utf16>
// pcbBuffer : DWORD* in/out -> Pointer<Uint32>
// ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function BCryptQueryContextFunctionConfiguration(
  dwTable: DWORD;   // BCRYPT_TABLE
  pszContext: PWideChar;   // LPCWSTR
  dwInterface: DWORD;   // BCRYPT_INTERFACE
  pszFunction: PWideChar;   // LPCWSTR
  pcbBuffer: Pointer;   // DWORD* in/out
  ppBuffer: Pointer   // CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
): Integer; stdcall;
  external 'bcrypt.dll' name 'BCryptQueryContextFunctionConfiguration';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "BCryptQueryContextFunctionConfiguration"
  c_BCryptQueryContextFunctionConfiguration :: Word32 -> CWString -> Word32 -> CWString -> Ptr Word32 -> Ptr () -> IO Int32
-- dwTable : BCRYPT_TABLE -> Word32
-- pszContext : LPCWSTR -> CWString
-- dwInterface : BCRYPT_INTERFACE -> Word32
-- pszFunction : LPCWSTR -> CWString
-- pcbBuffer : DWORD* in/out -> Ptr Word32
-- ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> Ptr ()
-- 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 bcryptquerycontextfunctionconfiguration =
  foreign "BCryptQueryContextFunctionConfiguration"
    (uint32_t @-> (ptr uint16_t) @-> uint32_t @-> (ptr uint16_t) @-> (ptr uint32_t) @-> (ptr void) @-> returning int32_t)
(* dwTable : BCRYPT_TABLE -> uint32_t *)
(* pszContext : LPCWSTR -> (ptr uint16_t) *)
(* dwInterface : BCRYPT_INTERFACE -> uint32_t *)
(* pszFunction : LPCWSTR -> (ptr uint16_t) *)
(* pcbBuffer : DWORD* in/out -> (ptr uint32_t) *)
(* ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> (ptr void) *)
(* 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 ("BCryptQueryContextFunctionConfiguration" bcrypt-query-context-function-configuration :convention :stdcall) :int32
  (dw-table :uint32)   ; BCRYPT_TABLE
  (psz-context (:string :encoding :utf-16le))   ; LPCWSTR
  (dw-interface :uint32)   ; BCRYPT_INTERFACE
  (psz-function (:string :encoding :utf-16le))   ; LPCWSTR
  (pcb-buffer :pointer)   ; DWORD* in/out
  (pp-buffer :pointer))   ; CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $BCryptQueryContextFunctionConfiguration = Win32::API::More->new('bcrypt',
    'int BCryptQueryContextFunctionConfiguration(DWORD dwTable, LPCWSTR pszContext, DWORD dwInterface, LPCWSTR pszFunction, LPVOID pcbBuffer, LPVOID ppBuffer)');
# my $ret = $BCryptQueryContextFunctionConfiguration->Call($dwTable, $pszContext, $dwInterface, $pszFunction, $pcbBuffer, $ppBuffer);
# dwTable : BCRYPT_TABLE -> DWORD
# pszContext : LPCWSTR -> LPCWSTR
# dwInterface : BCRYPT_INTERFACE -> DWORD
# pszFunction : LPCWSTR -> LPCWSTR
# pcbBuffer : DWORD* in/out -> LPVOID
# ppBuffer : CRYPT_CONTEXT_FUNCTION_CONFIG** optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

関連項目

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