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CertCreateContext

関数

エンコードデータから指定種類のコンテキストを作成する。

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>

void* CertCreateContext(
    DWORD dwContextType,
    DWORD dwEncodingType,
    const BYTE* pbEncoded,
    DWORD cbEncoded,
    DWORD dwFlags,
    CERT_CREATE_CONTEXT_PARA* pCreatePara   // optional
);

パラメーター

名前	型	方向
dwContextType	DWORD	in
dwEncodingType	DWORD	in
pbEncoded	BYTE*	in
cbEncoded	DWORD	in
dwFlags	DWORD	in
pCreatePara	CERT_CREATE_CONTEXT_PARA*	inoptional

戻り値の型: void*

各言語での呼び出し定義

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

void* CertCreateContext(
    DWORD dwContextType,
    DWORD dwEncodingType,
    const BYTE* pbEncoded,
    DWORD cbEncoded,
    DWORD dwFlags,
    CERT_CREATE_CONTEXT_PARA* pCreatePara   // optional
);

[DllImport("CRYPT32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr CertCreateContext(
    uint dwContextType,   // DWORD
    uint dwEncodingType,   // DWORD
    IntPtr pbEncoded,   // BYTE*
    uint cbEncoded,   // DWORD
    uint dwFlags,   // DWORD
    IntPtr pCreatePara   // CERT_CREATE_CONTEXT_PARA* optional
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CertCreateContext(
    dwContextType As UInteger,   ' DWORD
    dwEncodingType As UInteger,   ' DWORD
    pbEncoded As IntPtr,   ' BYTE*
    cbEncoded As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    pCreatePara As IntPtr   ' CERT_CREATE_CONTEXT_PARA* optional
) As IntPtr
End Function

' dwContextType : DWORD
' dwEncodingType : DWORD
' pbEncoded : BYTE*
' cbEncoded : DWORD
' dwFlags : DWORD
' pCreatePara : CERT_CREATE_CONTEXT_PARA* optional
Declare PtrSafe Function CertCreateContext Lib "crypt32" ( _
    ByVal dwContextType As Long, _
    ByVal dwEncodingType As Long, _
    ByVal pbEncoded As LongPtr, _
    ByVal cbEncoded As Long, _
    ByVal dwFlags As Long, _
    ByVal pCreatePara 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

CertCreateContext = ctypes.windll.crypt32.CertCreateContext
CertCreateContext.restype = ctypes.c_void_p
CertCreateContext.argtypes = [
    wintypes.DWORD,  # dwContextType : DWORD
    wintypes.DWORD,  # dwEncodingType : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pbEncoded : BYTE*
    wintypes.DWORD,  # cbEncoded : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # pCreatePara : CERT_CREATE_CONTEXT_PARA* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CertCreateContext = Fiddle::Function.new(
  lib['CertCreateContext'],
  [
    -Fiddle::TYPE_INT,  # dwContextType : DWORD
    -Fiddle::TYPE_INT,  # dwEncodingType : DWORD
    Fiddle::TYPE_VOIDP,  # pbEncoded : BYTE*
    -Fiddle::TYPE_INT,  # cbEncoded : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pCreatePara : CERT_CREATE_CONTEXT_PARA* optional
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "crypt32")]
extern "system" {
    fn CertCreateContext(
        dwContextType: u32,  // DWORD
        dwEncodingType: u32,  // DWORD
        pbEncoded: *const u8,  // BYTE*
        cbEncoded: u32,  // DWORD
        dwFlags: u32,  // DWORD
        pCreatePara: *mut CERT_CREATE_CONTEXT_PARA  // CERT_CREATE_CONTEXT_PARA* optional
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CRYPT32.dll", SetLastError = true)]
public static extern IntPtr CertCreateContext(uint dwContextType, uint dwEncodingType, IntPtr pbEncoded, uint cbEncoded, uint dwFlags, IntPtr pCreatePara);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CertCreateContext' -Namespace Win32 -PassThru
# $api::CertCreateContext(dwContextType, dwEncodingType, pbEncoded, cbEncoded, dwFlags, pCreatePara)

#uselib "CRYPT32.dll"
#func global CertCreateContext "CertCreateContext" sptr, sptr, sptr, sptr, sptr, sptr
; CertCreateContext dwContextType, dwEncodingType, varptr(pbEncoded), cbEncoded, dwFlags, varptr(pCreatePara)   ; 戻り値は stat
; dwContextType : DWORD -> "sptr"
; dwEncodingType : DWORD -> "sptr"
; pbEncoded : BYTE* -> "sptr"
; cbEncoded : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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 CertCreateContext "CertCreateContext" int, int, var, int, int, var
; res = CertCreateContext(dwContextType, dwEncodingType, pbEncoded, cbEncoded, dwFlags, pCreatePara)
; dwContextType : DWORD -> "int"
; dwEncodingType : DWORD -> "int"
; pbEncoded : BYTE* -> "var"
; cbEncoded : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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 CertCreateContext "CertCreateContext" int, int, sptr, int, int, sptr
; res = CertCreateContext(dwContextType, dwEncodingType, varptr(pbEncoded), cbEncoded, dwFlags, varptr(pCreatePara))
; dwContextType : DWORD -> "int"
; dwEncodingType : DWORD -> "int"
; pbEncoded : BYTE* -> "sptr"
; cbEncoded : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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:

; void* CertCreateContext(DWORD dwContextType, DWORD dwEncodingType, BYTE* pbEncoded, DWORD cbEncoded, DWORD dwFlags, CERT_CREATE_CONTEXT_PARA* pCreatePara)
#uselib "CRYPT32.dll"
#cfunc global CertCreateContext "CertCreateContext" int, int, var, int, int, var
; res = CertCreateContext(dwContextType, dwEncodingType, pbEncoded, cbEncoded, dwFlags, pCreatePara)
; dwContextType : DWORD -> "int"
; dwEncodingType : DWORD -> "int"
; pbEncoded : BYTE* -> "var"
; cbEncoded : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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。; void* CertCreateContext(DWORD dwContextType, DWORD dwEncodingType, BYTE* pbEncoded, DWORD cbEncoded, DWORD dwFlags, CERT_CREATE_CONTEXT_PARA* pCreatePara)
#uselib "CRYPT32.dll"
#cfunc global CertCreateContext "CertCreateContext" int, int, intptr, int, int, intptr
; res = CertCreateContext(dwContextType, dwEncodingType, varptr(pbEncoded), cbEncoded, dwFlags, varptr(pCreatePara))
; dwContextType : DWORD -> "int"
; dwEncodingType : DWORD -> "int"
; pbEncoded : BYTE* -> "intptr"
; cbEncoded : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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")
	procCertCreateContext = crypt32.NewProc("CertCreateContext")
)

// dwContextType (DWORD), dwEncodingType (DWORD), pbEncoded (BYTE*), cbEncoded (DWORD), dwFlags (DWORD), pCreatePara (CERT_CREATE_CONTEXT_PARA* optional)
r1, _, err := procCertCreateContext.Call(
	uintptr(dwContextType),
	uintptr(dwEncodingType),
	uintptr(pbEncoded),
	uintptr(cbEncoded),
	uintptr(dwFlags),
	uintptr(pCreatePara),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function CertCreateContext(
  dwContextType: DWORD;   // DWORD
  dwEncodingType: DWORD;   // DWORD
  pbEncoded: Pointer;   // BYTE*
  cbEncoded: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pCreatePara: Pointer   // CERT_CREATE_CONTEXT_PARA* optional
): Pointer; stdcall;
  external 'CRYPT32.dll' name 'CertCreateContext';

result := DllCall("CRYPT32\CertCreateContext"
    , "UInt", dwContextType   ; DWORD
    , "UInt", dwEncodingType   ; DWORD
    , "Ptr", pbEncoded   ; BYTE*
    , "UInt", cbEncoded   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Ptr", pCreatePara   ; CERT_CREATE_CONTEXT_PARA* optional
    , "Ptr")   ; return: void*

●CertCreateContext(dwContextType, dwEncodingType, pbEncoded, cbEncoded, dwFlags, pCreatePara) = DLL("CRYPT32.dll", "void* CertCreateContext(dword, dword, void*, dword, dword, void*)")
# 呼び出し: CertCreateContext(dwContextType, dwEncodingType, pbEncoded, cbEncoded, dwFlags, pCreatePara)
# dwContextType : DWORD -> "dword"
# dwEncodingType : DWORD -> "dword"
# pbEncoded : BYTE* -> "void*"
# cbEncoded : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# pCreatePara : CERT_CREATE_CONTEXT_PARA* optional -> "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)。