ホーム › Security.Cryptography › BCryptFreeBuffer

BCryptFreeBuffer

関数

CNGが割り当てたメモリバッファを解放する。

DLLbcrypt.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

void BCryptFreeBuffer(
    void* pvBuffer
);

パラメーター

名前	型	方向
pvBuffer	void*	in

戻り値の型: void

各言語での呼び出し定義

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

void BCryptFreeBuffer(
    void* pvBuffer
);

[DllImport("bcrypt.dll", ExactSpelling = true)]
static extern void BCryptFreeBuffer(
    IntPtr pvBuffer   // void*
);

<DllImport("bcrypt.dll", ExactSpelling:=True)>
Public Shared Sub BCryptFreeBuffer(
    pvBuffer As IntPtr   ' void*
)
End Sub

' pvBuffer : void*
Declare PtrSafe Sub BCryptFreeBuffer Lib "bcrypt" ( _
    ByVal pvBuffer As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

BCryptFreeBuffer = ctypes.windll.bcrypt.BCryptFreeBuffer
BCryptFreeBuffer.restype = None
BCryptFreeBuffer.argtypes = [
    ctypes.POINTER(None),  # pvBuffer : void*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('bcrypt.dll')
BCryptFreeBuffer = Fiddle::Function.new(
  lib['BCryptFreeBuffer'],
  [
    Fiddle::TYPE_VOIDP,  # pvBuffer : void*
  ],
  Fiddle::TYPE_VOID)

#[link(name = "bcrypt")]
extern "system" {
    fn BCryptFreeBuffer(
        pvBuffer: *mut ()  // void*
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("bcrypt.dll")]
public static extern void BCryptFreeBuffer(IntPtr pvBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'bcrypt_BCryptFreeBuffer' -Namespace Win32 -PassThru
# $api::BCryptFreeBuffer(pvBuffer)

#uselib "bcrypt.dll"
#func global BCryptFreeBuffer "BCryptFreeBuffer" sptr
; BCryptFreeBuffer pvBuffer
; pvBuffer : void* -> "sptr"

#uselib "bcrypt.dll"
#func global BCryptFreeBuffer "BCryptFreeBuffer" sptr
; BCryptFreeBuffer pvBuffer
; pvBuffer : void* -> "sptr"

; void BCryptFreeBuffer(void* pvBuffer)
#uselib "bcrypt.dll"
#func global BCryptFreeBuffer "BCryptFreeBuffer" intptr
; BCryptFreeBuffer pvBuffer
; pvBuffer : void* -> "intptr"

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

var (
	bcrypt = windows.NewLazySystemDLL("bcrypt.dll")
	procBCryptFreeBuffer = bcrypt.NewProc("BCryptFreeBuffer")
)

// pvBuffer (void*)
r1, _, err := procBCryptFreeBuffer.Call(
	uintptr(pvBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure BCryptFreeBuffer(
  pvBuffer: Pointer   // void*
); stdcall;
  external 'bcrypt.dll' name 'BCryptFreeBuffer';

result := DllCall("bcrypt\BCryptFreeBuffer"
    , "Ptr", pvBuffer   ; void*
    , "Int")   ; return: void

●BCryptFreeBuffer(pvBuffer) = DLL("bcrypt.dll", "int BCryptFreeBuffer(void*)")
# 呼び出し: BCryptFreeBuffer(pvBuffer)
# pvBuffer : void* -> "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)。