CertFindAttribute

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

CRYPT_ATTRIBUTE* CertFindAttribute(
    LPCSTR pszObjId,
    DWORD cAttr,
    CRYPT_ATTRIBUTE* rgAttr
);

<DllImport("CRYPT32.dll", ExactSpelling:=True)>
Public Shared Function CertFindAttribute(
    <MarshalAs(UnmanagedType.LPStr)> pszObjId As String,   ' LPCSTR
    cAttr As UInteger,   ' DWORD
    rgAttr As IntPtr   ' CRYPT_ATTRIBUTE*
) As IntPtr
End Function

' pszObjId : LPCSTR
' cAttr : DWORD
' rgAttr : CRYPT_ATTRIBUTE*
Declare PtrSafe Function CertFindAttribute Lib "crypt32" ( _
    ByVal pszObjId As String, _
    ByVal cAttr As Long, _
    ByVal rgAttr 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

CertFindAttribute = ctypes.windll.crypt32.CertFindAttribute
CertFindAttribute.restype = ctypes.c_void_p
CertFindAttribute.argtypes = [
    wintypes.LPCSTR,  # pszObjId : LPCSTR
    wintypes.DWORD,  # cAttr : DWORD
    ctypes.c_void_p,  # rgAttr : CRYPT_ATTRIBUTE*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CertFindAttribute = Fiddle::Function.new(
  lib['CertFindAttribute'],
  [
    Fiddle::TYPE_VOIDP,  # pszObjId : LPCSTR
    -Fiddle::TYPE_INT,  # cAttr : DWORD
    Fiddle::TYPE_VOIDP,  # rgAttr : CRYPT_ATTRIBUTE*
  ],
  Fiddle::TYPE_VOIDP)

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

$sig = @"
[DllImport("CRYPT32.dll")]
public static extern IntPtr CertFindAttribute([MarshalAs(UnmanagedType.LPStr)] string pszObjId, uint cAttr, IntPtr rgAttr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CertFindAttribute' -Namespace Win32 -PassThru
# $api::CertFindAttribute(pszObjId, cAttr, rgAttr)

#uselib "CRYPT32.dll"
#func global CertFindAttribute "CertFindAttribute" sptr, sptr, sptr
; CertFindAttribute pszObjId, cAttr, varptr(rgAttr)   ; 戻り値は stat
; pszObjId : LPCSTR -> "sptr"
; cAttr : DWORD -> "sptr"
; rgAttr : CRYPT_ATTRIBUTE* -> "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。

#uselib "CRYPT32.dll"
#cfunc global CertFindAttribute "CertFindAttribute" str, int, var
; res = CertFindAttribute(pszObjId, cAttr, rgAttr)
; pszObjId : LPCSTR -> "str"
; cAttr : DWORD -> "int"
; rgAttr : CRYPT_ATTRIBUTE* -> "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。

; CRYPT_ATTRIBUTE* CertFindAttribute(LPCSTR pszObjId, DWORD cAttr, CRYPT_ATTRIBUTE* rgAttr)
#uselib "CRYPT32.dll"
#cfunc global CertFindAttribute "CertFindAttribute" str, int, var
; res = CertFindAttribute(pszObjId, cAttr, rgAttr)
; pszObjId : LPCSTR -> "str"
; cAttr : DWORD -> "int"
; rgAttr : CRYPT_ATTRIBUTE* -> "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 (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCertFindAttribute = crypt32.NewProc("CertFindAttribute")
)

// pszObjId (LPCSTR), cAttr (DWORD), rgAttr (CRYPT_ATTRIBUTE*)
r1, _, err := procCertFindAttribute.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszObjId))),
	uintptr(cAttr),
	uintptr(rgAttr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // CRYPT_ATTRIBUTE*

function CertFindAttribute(
  pszObjId: PAnsiChar;   // LPCSTR
  cAttr: DWORD;   // DWORD
  rgAttr: Pointer   // CRYPT_ATTRIBUTE*
): Pointer; stdcall;
  external 'CRYPT32.dll' name 'CertFindAttribute';

result := DllCall("CRYPT32\CertFindAttribute"
    , "AStr", pszObjId   ; LPCSTR
    , "UInt", cAttr   ; DWORD
    , "Ptr", rgAttr   ; CRYPT_ATTRIBUTE*
    , "Ptr")   ; return: CRYPT_ATTRIBUTE*

●CertFindAttribute(pszObjId, cAttr, rgAttr) = DLL("CRYPT32.dll", "void* CertFindAttribute(char*, dword, void*)")
# 呼び出し: CertFindAttribute(pszObjId, cAttr, rgAttr)
# pszObjId : LPCSTR -> "char*"
# cAttr : DWORD -> "dword"
# rgAttr : CRYPT_ATTRIBUTE* -> "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)。