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CryptAcquireContextA

関数

暗号化サービスプロバイダーのコンテキストハンドルを取得する(ANSI版)。

DLLADVAPI32.dll文字セットANSI (-A)呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

BOOL CryptAcquireContextA(
    UINT_PTR* phProv,
    LPCSTR szContainer,   // optional
    LPCSTR szProvider,   // optional
    DWORD dwProvType,
    DWORD dwFlags
);

パラメーター

名前	型	方向
phProv	UINT_PTR*	out
szContainer	LPCSTR	inoptional
szProvider	LPCSTR	inoptional
dwProvType	DWORD	in
dwFlags	DWORD	in

戻り値の型: BOOL

各言語での呼び出し定義

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

BOOL CryptAcquireContextA(
    UINT_PTR* phProv,
    LPCSTR szContainer,   // optional
    LPCSTR szProvider,   // optional
    DWORD dwProvType,
    DWORD dwFlags
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
static extern bool CryptAcquireContextA(
    out UIntPtr phProv,   // UINT_PTR* out
    [MarshalAs(UnmanagedType.LPStr)] string szContainer,   // LPCSTR optional
    [MarshalAs(UnmanagedType.LPStr)] string szProvider,   // LPCSTR optional
    uint dwProvType,   // DWORD
    uint dwFlags   // DWORD
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptAcquireContextA(
    <Out> ByRef phProv As UIntPtr,   ' UINT_PTR* out
    <MarshalAs(UnmanagedType.LPStr)> szContainer As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> szProvider As String,   ' LPCSTR optional
    dwProvType As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Boolean
End Function

' phProv : UINT_PTR* out
' szContainer : LPCSTR optional
' szProvider : LPCSTR optional
' dwProvType : DWORD
' dwFlags : DWORD
Declare PtrSafe Function CryptAcquireContextA Lib "advapi32" ( _
    ByRef phProv As LongPtr, _
    ByVal szContainer As String, _
    ByVal szProvider As String, _
    ByVal dwProvType As Long, _
    ByVal dwFlags 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

CryptAcquireContextA = ctypes.windll.advapi32.CryptAcquireContextA
CryptAcquireContextA.restype = wintypes.BOOL
CryptAcquireContextA.argtypes = [
    ctypes.POINTER(ctypes.c_size_t),  # phProv : UINT_PTR* out
    wintypes.LPCSTR,  # szContainer : LPCSTR optional
    wintypes.LPCSTR,  # szProvider : LPCSTR optional
    wintypes.DWORD,  # dwProvType : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CryptAcquireContextA = Fiddle::Function.new(
  lib['CryptAcquireContextA'],
  [
    Fiddle::TYPE_VOIDP,  # phProv : UINT_PTR* out
    Fiddle::TYPE_VOIDP,  # szContainer : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # szProvider : LPCSTR optional
    -Fiddle::TYPE_INT,  # dwProvType : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn CryptAcquireContextA(
        phProv: *mut usize,  // UINT_PTR* out
        szContainer: *const u8,  // LPCSTR optional
        szProvider: *const u8,  // LPCSTR optional
        dwProvType: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool CryptAcquireContextA(out UIntPtr phProv, [MarshalAs(UnmanagedType.LPStr)] string szContainer, [MarshalAs(UnmanagedType.LPStr)] string szProvider, uint dwProvType, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CryptAcquireContextA' -Namespace Win32 -PassThru
# $api::CryptAcquireContextA(phProv, szContainer, szProvider, dwProvType, dwFlags)

#uselib "ADVAPI32.dll"
#func global CryptAcquireContextA "CryptAcquireContextA" sptr, sptr, sptr, sptr, sptr
; CryptAcquireContextA varptr(phProv), szContainer, szProvider, dwProvType, dwFlags   ; 戻り値は stat
; phProv : UINT_PTR* out -> "sptr"
; szContainer : LPCSTR optional -> "sptr"
; szProvider : LPCSTR optional -> "sptr"
; dwProvType : DWORD -> "sptr"
; dwFlags : DWORD -> "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 "ADVAPI32.dll"
#cfunc global CryptAcquireContextA "CryptAcquireContextA" var, str, str, int, int
; res = CryptAcquireContextA(phProv, szContainer, szProvider, dwProvType, dwFlags)
; phProv : UINT_PTR* out -> "var"
; szContainer : LPCSTR optional -> "str"
; szProvider : LPCSTR optional -> "str"
; dwProvType : DWORD -> "int"
; dwFlags : DWORD -> "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 "ADVAPI32.dll"
#cfunc global CryptAcquireContextA "CryptAcquireContextA" sptr, str, str, int, int
; res = CryptAcquireContextA(varptr(phProv), szContainer, szProvider, dwProvType, dwFlags)
; phProv : UINT_PTR* out -> "sptr"
; szContainer : LPCSTR optional -> "str"
; szProvider : LPCSTR optional -> "str"
; dwProvType : DWORD -> "int"
; dwFlags : DWORD -> "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 CryptAcquireContextA(UINT_PTR* phProv, LPCSTR szContainer, LPCSTR szProvider, DWORD dwProvType, DWORD dwFlags)
#uselib "ADVAPI32.dll"
#cfunc global CryptAcquireContextA "CryptAcquireContextA" var, str, str, int, int
; res = CryptAcquireContextA(phProv, szContainer, szProvider, dwProvType, dwFlags)
; phProv : UINT_PTR* out -> "var"
; szContainer : LPCSTR optional -> "str"
; szProvider : LPCSTR optional -> "str"
; dwProvType : DWORD -> "int"
; dwFlags : DWORD -> "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 CryptAcquireContextA(UINT_PTR* phProv, LPCSTR szContainer, LPCSTR szProvider, DWORD dwProvType, DWORD dwFlags)
#uselib "ADVAPI32.dll"
#cfunc global CryptAcquireContextA "CryptAcquireContextA" intptr, str, str, int, int
; res = CryptAcquireContextA(varptr(phProv), szContainer, szProvider, dwProvType, dwFlags)
; phProv : UINT_PTR* out -> "intptr"
; szContainer : LPCSTR optional -> "str"
; szProvider : LPCSTR optional -> "str"
; dwProvType : DWORD -> "int"
; dwFlags : DWORD -> "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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procCryptAcquireContextA = advapi32.NewProc("CryptAcquireContextA")
)

// phProv (UINT_PTR* out), szContainer (LPCSTR optional), szProvider (LPCSTR optional), dwProvType (DWORD), dwFlags (DWORD)
r1, _, err := procCryptAcquireContextA.Call(
	uintptr(phProv),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szContainer))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szProvider))),
	uintptr(dwProvType),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CryptAcquireContextA(
  phProv: Pointer;   // UINT_PTR* out
  szContainer: PAnsiChar;   // LPCSTR optional
  szProvider: PAnsiChar;   // LPCSTR optional
  dwProvType: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CryptAcquireContextA';

result := DllCall("ADVAPI32\CryptAcquireContextA"
    , "Ptr", phProv   ; UINT_PTR* out
    , "AStr", szContainer   ; LPCSTR optional
    , "AStr", szProvider   ; LPCSTR optional
    , "UInt", dwProvType   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: BOOL

●CryptAcquireContextA(phProv, szContainer, szProvider, dwProvType, dwFlags) = DLL("ADVAPI32.dll", "bool CryptAcquireContextA(void*, char*, char*, dword, dword)")
# 呼び出し: CryptAcquireContextA(phProv, szContainer, szProvider, dwProvType, dwFlags)
# phProv : UINT_PTR* out -> "void*"
# szContainer : LPCSTR optional -> "char*"
# szProvider : LPCSTR optional -> "char*"
# dwProvType : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# 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)。