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CertFindExtension

関数

拡張配列から指定OIDの証明書拡張を検索する。

DLLCRYPT32.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

// CRYPT32.dll
#include <windows.h>

CERT_EXTENSION* CertFindExtension(
    LPCSTR pszObjId,
    DWORD cExtensions,
    CERT_EXTENSION* rgExtensions
);

パラメーター

名前	型	方向
pszObjId	LPCSTR	in
cExtensions	DWORD	in
rgExtensions	CERT_EXTENSION*	in

戻り値の型: CERT_EXTENSION*

各言語での呼び出し定義

// CRYPT32.dll
#include <windows.h>

CERT_EXTENSION* CertFindExtension(
    LPCSTR pszObjId,
    DWORD cExtensions,
    CERT_EXTENSION* rgExtensions
);

[DllImport("CRYPT32.dll", ExactSpelling = true)]
static extern IntPtr CertFindExtension(
    [MarshalAs(UnmanagedType.LPStr)] string pszObjId,   // LPCSTR
    uint cExtensions,   // DWORD
    IntPtr rgExtensions   // CERT_EXTENSION*
);

<DllImport("CRYPT32.dll", ExactSpelling:=True)>
Public Shared Function CertFindExtension(
    <MarshalAs(UnmanagedType.LPStr)> pszObjId As String,   ' LPCSTR
    cExtensions As UInteger,   ' DWORD
    rgExtensions As IntPtr   ' CERT_EXTENSION*
) As IntPtr
End Function

' pszObjId : LPCSTR
' cExtensions : DWORD
' rgExtensions : CERT_EXTENSION*
Declare PtrSafe Function CertFindExtension Lib "crypt32" ( _
    ByVal pszObjId As String, _
    ByVal cExtensions As Long, _
    ByVal rgExtensions As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CertFindExtension = ctypes.windll.crypt32.CertFindExtension
CertFindExtension.restype = ctypes.c_void_p
CertFindExtension.argtypes = [
    wintypes.LPCSTR,  # pszObjId : LPCSTR
    wintypes.DWORD,  # cExtensions : DWORD
    ctypes.c_void_p,  # rgExtensions : CERT_EXTENSION*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CertFindExtension = Fiddle::Function.new(
  lib['CertFindExtension'],
  [
    Fiddle::TYPE_VOIDP,  # pszObjId : LPCSTR
    -Fiddle::TYPE_INT,  # cExtensions : DWORD
    Fiddle::TYPE_VOIDP,  # rgExtensions : CERT_EXTENSION*
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "crypt32")]
extern "system" {
    fn CertFindExtension(
        pszObjId: *const u8,  // LPCSTR
        cExtensions: u32,  // DWORD
        rgExtensions: *mut CERT_EXTENSION  // CERT_EXTENSION*
    ) -> *mut CERT_EXTENSION;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CRYPT32.dll")]
public static extern IntPtr CertFindExtension([MarshalAs(UnmanagedType.LPStr)] string pszObjId, uint cExtensions, IntPtr rgExtensions);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CertFindExtension' -Namespace Win32 -PassThru
# $api::CertFindExtension(pszObjId, cExtensions, rgExtensions)

#uselib "CRYPT32.dll"
#func global CertFindExtension "CertFindExtension" sptr, sptr, sptr
; CertFindExtension pszObjId, cExtensions, varptr(rgExtensions)   ; 戻り値は stat
; pszObjId : LPCSTR -> "sptr"
; cExtensions : DWORD -> "sptr"
; rgExtensions : CERT_EXTENSION* -> "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 "CRYPT32.dll"
#cfunc global CertFindExtension "CertFindExtension" str, int, var
; res = CertFindExtension(pszObjId, cExtensions, rgExtensions)
; pszObjId : LPCSTR -> "str"
; cExtensions : DWORD -> "int"
; rgExtensions : CERT_EXTENSION* -> "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。#uselib "CRYPT32.dll"
#cfunc global CertFindExtension "CertFindExtension" str, int, sptr
; res = CertFindExtension(pszObjId, cExtensions, varptr(rgExtensions))
; pszObjId : LPCSTR -> "str"
; cExtensions : DWORD -> "int"
; rgExtensions : CERT_EXTENSION* -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; CERT_EXTENSION* CertFindExtension(LPCSTR pszObjId, DWORD cExtensions, CERT_EXTENSION* rgExtensions)
#uselib "CRYPT32.dll"
#cfunc global CertFindExtension "CertFindExtension" str, int, var
; res = CertFindExtension(pszObjId, cExtensions, rgExtensions)
; pszObjId : LPCSTR -> "str"
; cExtensions : DWORD -> "int"
; rgExtensions : CERT_EXTENSION* -> "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。; CERT_EXTENSION* CertFindExtension(LPCSTR pszObjId, DWORD cExtensions, CERT_EXTENSION* rgExtensions)
#uselib "CRYPT32.dll"
#cfunc global CertFindExtension "CertFindExtension" str, int, intptr
; res = CertFindExtension(pszObjId, cExtensions, varptr(rgExtensions))
; pszObjId : LPCSTR -> "str"
; cExtensions : DWORD -> "int"
; rgExtensions : CERT_EXTENSION* -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCertFindExtension = crypt32.NewProc("CertFindExtension")
)

// pszObjId (LPCSTR), cExtensions (DWORD), rgExtensions (CERT_EXTENSION*)
r1, _, err := procCertFindExtension.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszObjId))),
	uintptr(cExtensions),
	uintptr(rgExtensions),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // CERT_EXTENSION*

function CertFindExtension(
  pszObjId: PAnsiChar;   // LPCSTR
  cExtensions: DWORD;   // DWORD
  rgExtensions: Pointer   // CERT_EXTENSION*
): Pointer; stdcall;
  external 'CRYPT32.dll' name 'CertFindExtension';

result := DllCall("CRYPT32\CertFindExtension"
    , "AStr", pszObjId   ; LPCSTR
    , "UInt", cExtensions   ; DWORD
    , "Ptr", rgExtensions   ; CERT_EXTENSION*
    , "Ptr")   ; return: CERT_EXTENSION*

●CertFindExtension(pszObjId, cExtensions, rgExtensions) = DLL("CRYPT32.dll", "void* CertFindExtension(char*, dword, void*)")
# 呼び出し: CertFindExtension(pszObjId, cExtensions, rgExtensions)
# pszObjId : LPCSTR -> "char*"
# cExtensions : DWORD -> "dword"
# rgExtensions : CERT_EXTENSION* -> "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)。