ホーム › Security.Cryptography › CryptAcquireCertificatePrivateKey

CryptAcquireCertificatePrivateKey

関数

証明書に関連付けられた秘密鍵プロバイダ/鍵ハンドルを取得する。

DLLCRYPT32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

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

BOOL CryptAcquireCertificatePrivateKey(
    const CERT_CONTEXT* pCert,
    CRYPT_ACQUIRE_FLAGS dwFlags,
    void* pvParameters,   // optional
    HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* phCryptProvOrNCryptKey,
    CERT_KEY_SPEC* pdwKeySpec,   // optional
    BOOL* pfCallerFreeProvOrNCryptKey   // optional
);

パラメーター

名前	型	方向
pCert	CERT_CONTEXT*	in
dwFlags	CRYPT_ACQUIRE_FLAGS	in
pvParameters	void*	inoptional
phCryptProvOrNCryptKey	HCRYPTPROV_OR_NCRYPT_KEY_HANDLE*	out
pdwKeySpec	CERT_KEY_SPEC*	outoptional
pfCallerFreeProvOrNCryptKey	BOOL*	outoptional

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL CryptAcquireCertificatePrivateKey(
    const CERT_CONTEXT* pCert,
    CRYPT_ACQUIRE_FLAGS dwFlags,
    void* pvParameters,   // optional
    HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* phCryptProvOrNCryptKey,
    CERT_KEY_SPEC* pdwKeySpec,   // optional
    BOOL* pfCallerFreeProvOrNCryptKey   // optional
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool CryptAcquireCertificatePrivateKey(
    IntPtr pCert,   // CERT_CONTEXT*
    uint dwFlags,   // CRYPT_ACQUIRE_FLAGS
    IntPtr pvParameters,   // void* optional
    out UIntPtr phCryptProvOrNCryptKey,   // HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
    IntPtr pdwKeySpec,   // CERT_KEY_SPEC* optional, out
    IntPtr pfCallerFreeProvOrNCryptKey   // BOOL* optional, out
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptAcquireCertificatePrivateKey(
    pCert As IntPtr,   ' CERT_CONTEXT*
    dwFlags As UInteger,   ' CRYPT_ACQUIRE_FLAGS
    pvParameters As IntPtr,   ' void* optional
    <Out> ByRef phCryptProvOrNCryptKey As UIntPtr,   ' HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
    pdwKeySpec As IntPtr,   ' CERT_KEY_SPEC* optional, out
    pfCallerFreeProvOrNCryptKey As IntPtr   ' BOOL* optional, out
) As Boolean
End Function

' pCert : CERT_CONTEXT*
' dwFlags : CRYPT_ACQUIRE_FLAGS
' pvParameters : void* optional
' phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
' pdwKeySpec : CERT_KEY_SPEC* optional, out
' pfCallerFreeProvOrNCryptKey : BOOL* optional, out
Declare PtrSafe Function CryptAcquireCertificatePrivateKey Lib "crypt32" ( _
    ByVal pCert As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal pvParameters As LongPtr, _
    ByRef phCryptProvOrNCryptKey As LongPtr, _
    ByVal pdwKeySpec As LongPtr, _
    ByVal pfCallerFreeProvOrNCryptKey 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

CryptAcquireCertificatePrivateKey = ctypes.windll.crypt32.CryptAcquireCertificatePrivateKey
CryptAcquireCertificatePrivateKey.restype = wintypes.BOOL
CryptAcquireCertificatePrivateKey.argtypes = [
    ctypes.c_void_p,  # pCert : CERT_CONTEXT*
    wintypes.DWORD,  # dwFlags : CRYPT_ACQUIRE_FLAGS
    ctypes.POINTER(None),  # pvParameters : void* optional
    ctypes.c_void_p,  # phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
    ctypes.c_void_p,  # pdwKeySpec : CERT_KEY_SPEC* optional, out
    ctypes.c_void_p,  # pfCallerFreeProvOrNCryptKey : BOOL* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CryptAcquireCertificatePrivateKey = Fiddle::Function.new(
  lib['CryptAcquireCertificatePrivateKey'],
  [
    Fiddle::TYPE_VOIDP,  # pCert : CERT_CONTEXT*
    -Fiddle::TYPE_INT,  # dwFlags : CRYPT_ACQUIRE_FLAGS
    Fiddle::TYPE_VOIDP,  # pvParameters : void* optional
    Fiddle::TYPE_VOIDP,  # phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
    Fiddle::TYPE_VOIDP,  # pdwKeySpec : CERT_KEY_SPEC* optional, out
    Fiddle::TYPE_VOIDP,  # pfCallerFreeProvOrNCryptKey : BOOL* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CryptAcquireCertificatePrivateKey(
        pCert: *const CERT_CONTEXT,  // CERT_CONTEXT*
        dwFlags: u32,  // CRYPT_ACQUIRE_FLAGS
        pvParameters: *mut (),  // void* optional
        phCryptProvOrNCryptKey: *mut usize,  // HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
        pdwKeySpec: *mut u32,  // CERT_KEY_SPEC* optional, out
        pfCallerFreeProvOrNCryptKey: *mut i32  // BOOL* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", SetLastError = true)]
public static extern bool CryptAcquireCertificatePrivateKey(IntPtr pCert, uint dwFlags, IntPtr pvParameters, out UIntPtr phCryptProvOrNCryptKey, IntPtr pdwKeySpec, IntPtr pfCallerFreeProvOrNCryptKey);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CryptAcquireCertificatePrivateKey' -Namespace Win32 -PassThru
# $api::CryptAcquireCertificatePrivateKey(pCert, dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)

#uselib "CRYPT32.dll"
#func global CryptAcquireCertificatePrivateKey "CryptAcquireCertificatePrivateKey" sptr, sptr, sptr, sptr, sptr, sptr
; CryptAcquireCertificatePrivateKey varptr(pCert), dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey   ; 戻り値は stat
; pCert : CERT_CONTEXT* -> "sptr"
; dwFlags : CRYPT_ACQUIRE_FLAGS -> "sptr"
; pvParameters : void* optional -> "sptr"
; phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "sptr"
; pdwKeySpec : CERT_KEY_SPEC* optional, out -> "sptr"
; pfCallerFreeProvOrNCryptKey : BOOL* 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 "CRYPT32.dll"
#cfunc global CryptAcquireCertificatePrivateKey "CryptAcquireCertificatePrivateKey" var, int, sptr, int, int, int
; res = CryptAcquireCertificatePrivateKey(pCert, dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)
; pCert : CERT_CONTEXT* -> "var"
; dwFlags : CRYPT_ACQUIRE_FLAGS -> "int"
; pvParameters : void* optional -> "sptr"
; phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "int"
; pdwKeySpec : CERT_KEY_SPEC* optional, out -> "int"
; pfCallerFreeProvOrNCryptKey : BOOL* optional, out -> "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。#uselib "CRYPT32.dll"
#cfunc global CryptAcquireCertificatePrivateKey "CryptAcquireCertificatePrivateKey" sptr, int, sptr, int, int, int
; res = CryptAcquireCertificatePrivateKey(varptr(pCert), dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)
; pCert : CERT_CONTEXT* -> "sptr"
; dwFlags : CRYPT_ACQUIRE_FLAGS -> "int"
; pvParameters : void* optional -> "sptr"
; phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "int"
; pdwKeySpec : CERT_KEY_SPEC* optional, out -> "int"
; pfCallerFreeProvOrNCryptKey : BOOL* optional, out -> "int"
; ※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:

; BOOL CryptAcquireCertificatePrivateKey(CERT_CONTEXT* pCert, CRYPT_ACQUIRE_FLAGS dwFlags, void* pvParameters, HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* phCryptProvOrNCryptKey, CERT_KEY_SPEC* pdwKeySpec, BOOL* pfCallerFreeProvOrNCryptKey)
#uselib "CRYPT32.dll"
#cfunc global CryptAcquireCertificatePrivateKey "CryptAcquireCertificatePrivateKey" var, int, intptr, int, int, int
; res = CryptAcquireCertificatePrivateKey(pCert, dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)
; pCert : CERT_CONTEXT* -> "var"
; dwFlags : CRYPT_ACQUIRE_FLAGS -> "int"
; pvParameters : void* optional -> "intptr"
; phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "int"
; pdwKeySpec : CERT_KEY_SPEC* optional, out -> "int"
; pfCallerFreeProvOrNCryptKey : BOOL* optional, out -> "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。; BOOL CryptAcquireCertificatePrivateKey(CERT_CONTEXT* pCert, CRYPT_ACQUIRE_FLAGS dwFlags, void* pvParameters, HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* phCryptProvOrNCryptKey, CERT_KEY_SPEC* pdwKeySpec, BOOL* pfCallerFreeProvOrNCryptKey)
#uselib "CRYPT32.dll"
#cfunc global CryptAcquireCertificatePrivateKey "CryptAcquireCertificatePrivateKey" intptr, int, intptr, int, int, int
; res = CryptAcquireCertificatePrivateKey(varptr(pCert), dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)
; pCert : CERT_CONTEXT* -> "intptr"
; dwFlags : CRYPT_ACQUIRE_FLAGS -> "int"
; pvParameters : void* optional -> "intptr"
; phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "int"
; pdwKeySpec : CERT_KEY_SPEC* optional, out -> "int"
; pfCallerFreeProvOrNCryptKey : BOOL* optional, out -> "int"
; ※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")
	procCryptAcquireCertificatePrivateKey = crypt32.NewProc("CryptAcquireCertificatePrivateKey")
)

// pCert (CERT_CONTEXT*), dwFlags (CRYPT_ACQUIRE_FLAGS), pvParameters (void* optional), phCryptProvOrNCryptKey (HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out), pdwKeySpec (CERT_KEY_SPEC* optional, out), pfCallerFreeProvOrNCryptKey (BOOL* optional, out)
r1, _, err := procCryptAcquireCertificatePrivateKey.Call(
	uintptr(pCert),
	uintptr(dwFlags),
	uintptr(pvParameters),
	uintptr(phCryptProvOrNCryptKey),
	uintptr(pdwKeySpec),
	uintptr(pfCallerFreeProvOrNCryptKey),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CryptAcquireCertificatePrivateKey(
  pCert: Pointer;   // CERT_CONTEXT*
  dwFlags: DWORD;   // CRYPT_ACQUIRE_FLAGS
  pvParameters: Pointer;   // void* optional
  phCryptProvOrNCryptKey: Pointer;   // HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
  pdwKeySpec: Pointer;   // CERT_KEY_SPEC* optional, out
  pfCallerFreeProvOrNCryptKey: Pointer   // BOOL* optional, out
): BOOL; stdcall;
  external 'CRYPT32.dll' name 'CryptAcquireCertificatePrivateKey';

result := DllCall("CRYPT32\CryptAcquireCertificatePrivateKey"
    , "Ptr", pCert   ; CERT_CONTEXT*
    , "UInt", dwFlags   ; CRYPT_ACQUIRE_FLAGS
    , "Ptr", pvParameters   ; void* optional
    , "Ptr", phCryptProvOrNCryptKey   ; HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out
    , "Ptr", pdwKeySpec   ; CERT_KEY_SPEC* optional, out
    , "Ptr", pfCallerFreeProvOrNCryptKey   ; BOOL* optional, out
    , "Int")   ; return: BOOL

●CryptAcquireCertificatePrivateKey(pCert, dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey) = DLL("CRYPT32.dll", "bool CryptAcquireCertificatePrivateKey(void*, dword, void*, void*, void*, void*)")
# 呼び出し: CryptAcquireCertificatePrivateKey(pCert, dwFlags, pvParameters, phCryptProvOrNCryptKey, pdwKeySpec, pfCallerFreeProvOrNCryptKey)
# pCert : CERT_CONTEXT* -> "void*"
# dwFlags : CRYPT_ACQUIRE_FLAGS -> "dword"
# pvParameters : void* optional -> "void*"
# phCryptProvOrNCryptKey : HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* out -> "void*"
# pdwKeySpec : CERT_KEY_SPEC* optional, out -> "void*"
# pfCallerFreeProvOrNCryptKey : BOOL* 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)。