Win32 API 日本語リファレンス
ホーム › Security.Cryptography.Certificates › CertSrvBackupRead

CertSrvBackupRead

関数
バックアップ中のファイルからデータをバッファへ読み込む。
DLLcertadm.dll呼出規約winapi対応OSwindowsserver2003
📘 Microsoft Learn (日本語) · English

シグネチャ

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

HRESULT CertSrvBackupRead(
    void* hbc,
    void* pvBuffer,
    DWORD cbBuffer,
    DWORD* pcbRead
);

パラメーター

名前型方向説明
hbcvoid*inoutCertSrvBackupPrepareWで取得したバックアップコンテキストハンドル。
pvBuffervoid*inout読み出したデータを受け取る出力バッファ。
cbBufferDWORDinpvBufferのバッファバイトサイズ。
pcbReadDWORD*inout実際に読み出したバイト数を受け取る出力ポインタ。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT CertSrvBackupRead(
    void* hbc,
    void* pvBuffer,
    DWORD cbBuffer,
    DWORD* pcbRead
);
[DllImport("certadm.dll", ExactSpelling = true)]
static extern int CertSrvBackupRead(
    IntPtr hbc,   // void* in/out
    IntPtr pvBuffer,   // void* in/out
    uint cbBuffer,   // DWORD
    ref uint pcbRead   // DWORD* in/out
);
<DllImport("certadm.dll", ExactSpelling:=True)>
Public Shared Function CertSrvBackupRead(
    hbc As IntPtr,   ' void* in/out
    pvBuffer As IntPtr,   ' void* in/out
    cbBuffer As UInteger,   ' DWORD
    ByRef pcbRead As UInteger   ' DWORD* in/out
) As Integer
End Function
' hbc : void* in/out
' pvBuffer : void* in/out
' cbBuffer : DWORD
' pcbRead : DWORD* in/out
Declare PtrSafe Function CertSrvBackupRead Lib "certadm" ( _
    ByVal hbc As LongPtr, _
    ByVal pvBuffer As LongPtr, _
    ByVal cbBuffer As Long, _
    ByRef pcbRead 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

CertSrvBackupRead = ctypes.windll.certadm.CertSrvBackupRead
CertSrvBackupRead.restype = ctypes.c_int
CertSrvBackupRead.argtypes = [
    ctypes.POINTER(None),  # hbc : void* in/out
    ctypes.POINTER(None),  # pvBuffer : void* in/out
    wintypes.DWORD,  # cbBuffer : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pcbRead : DWORD* in/out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('certadm.dll')
CertSrvBackupRead = Fiddle::Function.new(
  lib['CertSrvBackupRead'],
  [
    Fiddle::TYPE_VOIDP,  # hbc : void* in/out
    Fiddle::TYPE_VOIDP,  # pvBuffer : void* in/out
    -Fiddle::TYPE_INT,  # cbBuffer : DWORD
    Fiddle::TYPE_VOIDP,  # pcbRead : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
#[link(name = "certadm")]
extern "system" {
    fn CertSrvBackupRead(
        hbc: *mut (),  // void* in/out
        pvBuffer: *mut (),  // void* in/out
        cbBuffer: u32,  // DWORD
        pcbRead: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("certadm.dll")]
public static extern int CertSrvBackupRead(IntPtr hbc, IntPtr pvBuffer, uint cbBuffer, ref uint pcbRead);
"@
$api = Add-Type -MemberDefinition $sig -Name 'certadm_CertSrvBackupRead' -Namespace Win32 -PassThru
# $api::CertSrvBackupRead(hbc, pvBuffer, cbBuffer, pcbRead)
#uselib "certadm.dll"
#func global CertSrvBackupRead "CertSrvBackupRead" sptr, sptr, sptr, sptr
; CertSrvBackupRead hbc, pvBuffer, cbBuffer, varptr(pcbRead)   ; 戻り値は stat
; hbc : void* in/out -> "sptr"
; pvBuffer : void* in/out -> "sptr"
; cbBuffer : DWORD -> "sptr"
; pcbRead : DWORD* in/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 "certadm.dll"
#cfunc global CertSrvBackupRead "CertSrvBackupRead" sptr, sptr, int, var
; res = CertSrvBackupRead(hbc, pvBuffer, cbBuffer, pcbRead)
; hbc : void* in/out -> "sptr"
; pvBuffer : void* in/out -> "sptr"
; cbBuffer : DWORD -> "int"
; pcbRead : DWORD* in/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: 
; HRESULT CertSrvBackupRead(void* hbc, void* pvBuffer, DWORD cbBuffer, DWORD* pcbRead)
#uselib "certadm.dll"
#cfunc global CertSrvBackupRead "CertSrvBackupRead" intptr, intptr, int, var
; res = CertSrvBackupRead(hbc, pvBuffer, cbBuffer, pcbRead)
; hbc : void* in/out -> "intptr"
; pvBuffer : void* in/out -> "intptr"
; cbBuffer : DWORD -> "int"
; pcbRead : DWORD* in/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 (
	certadm = windows.NewLazySystemDLL("certadm.dll")
	procCertSrvBackupRead = certadm.NewProc("CertSrvBackupRead")
)

// hbc (void* in/out), pvBuffer (void* in/out), cbBuffer (DWORD), pcbRead (DWORD* in/out)
r1, _, err := procCertSrvBackupRead.Call(
	uintptr(hbc),
	uintptr(pvBuffer),
	uintptr(cbBuffer),
	uintptr(pcbRead),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT
function CertSrvBackupRead(
  hbc: Pointer;   // void* in/out
  pvBuffer: Pointer;   // void* in/out
  cbBuffer: DWORD;   // DWORD
  pcbRead: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'certadm.dll' name 'CertSrvBackupRead';
result := DllCall("certadm\CertSrvBackupRead"
    , "Ptr", hbc   ; void* in/out
    , "Ptr", pvBuffer   ; void* in/out
    , "UInt", cbBuffer   ; DWORD
    , "Ptr", pcbRead   ; DWORD* in/out
    , "Int")   ; return: HRESULT
●CertSrvBackupRead(hbc, pvBuffer, cbBuffer, pcbRead) = DLL("certadm.dll", "int CertSrvBackupRead(void*, void*, dword, void*)")
# 呼び出し: CertSrvBackupRead(hbc, pvBuffer, cbBuffer, pcbRead)
# hbc : void* in/out -> "void*"
# pvBuffer : void* in/out -> "void*"
# cbBuffer : DWORD -> "dword"
# pcbRead : DWORD* in/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)。