CertGetIntendedKeyUsage

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

BOOL CertGetIntendedKeyUsage(
    CERT_QUERY_ENCODING_TYPE dwCertEncodingType,
    CERT_INFO* pCertInfo,
    BYTE* pbKeyUsage,
    DWORD cbKeyUsage
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CertGetIntendedKeyUsage(
    dwCertEncodingType As UInteger,   ' CERT_QUERY_ENCODING_TYPE
    pCertInfo As IntPtr,   ' CERT_INFO*
    pbKeyUsage As IntPtr,   ' BYTE* out
    cbKeyUsage As UInteger   ' DWORD
) As Boolean
End Function

' dwCertEncodingType : CERT_QUERY_ENCODING_TYPE
' pCertInfo : CERT_INFO*
' pbKeyUsage : BYTE* out
' cbKeyUsage : DWORD
Declare PtrSafe Function CertGetIntendedKeyUsage Lib "crypt32" ( _
    ByVal dwCertEncodingType As Long, _
    ByVal pCertInfo As LongPtr, _
    ByVal pbKeyUsage As LongPtr, _
    ByVal cbKeyUsage 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

CertGetIntendedKeyUsage = ctypes.windll.crypt32.CertGetIntendedKeyUsage
CertGetIntendedKeyUsage.restype = wintypes.BOOL
CertGetIntendedKeyUsage.argtypes = [
    wintypes.DWORD,  # dwCertEncodingType : CERT_QUERY_ENCODING_TYPE
    ctypes.c_void_p,  # pCertInfo : CERT_INFO*
    ctypes.POINTER(ctypes.c_ubyte),  # pbKeyUsage : BYTE* out
    wintypes.DWORD,  # cbKeyUsage : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CertGetIntendedKeyUsage = Fiddle::Function.new(
  lib['CertGetIntendedKeyUsage'],
  [
    -Fiddle::TYPE_INT,  # dwCertEncodingType : CERT_QUERY_ENCODING_TYPE
    Fiddle::TYPE_VOIDP,  # pCertInfo : CERT_INFO*
    Fiddle::TYPE_VOIDP,  # pbKeyUsage : BYTE* out
    -Fiddle::TYPE_INT,  # cbKeyUsage : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CertGetIntendedKeyUsage(
        dwCertEncodingType: u32,  // CERT_QUERY_ENCODING_TYPE
        pCertInfo: *mut CERT_INFO,  // CERT_INFO*
        pbKeyUsage: *mut u8,  // BYTE* out
        cbKeyUsage: u32  // DWORD
    ) -> 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 CertGetIntendedKeyUsage(uint dwCertEncodingType, IntPtr pCertInfo, IntPtr pbKeyUsage, uint cbKeyUsage);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CertGetIntendedKeyUsage' -Namespace Win32 -PassThru
# $api::CertGetIntendedKeyUsage(dwCertEncodingType, pCertInfo, pbKeyUsage, cbKeyUsage)

#uselib "CRYPT32.dll"
#func global CertGetIntendedKeyUsage "CertGetIntendedKeyUsage" sptr, sptr, sptr, sptr
; CertGetIntendedKeyUsage dwCertEncodingType, varptr(pCertInfo), varptr(pbKeyUsage), cbKeyUsage   ; 戻り値は stat
; dwCertEncodingType : CERT_QUERY_ENCODING_TYPE -> "sptr"
; pCertInfo : CERT_INFO* -> "sptr"
; pbKeyUsage : BYTE* out -> "sptr"
; cbKeyUsage : 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。

#uselib "CRYPT32.dll"
#cfunc global CertGetIntendedKeyUsage "CertGetIntendedKeyUsage" int, var, var, int
; res = CertGetIntendedKeyUsage(dwCertEncodingType, pCertInfo, pbKeyUsage, cbKeyUsage)
; dwCertEncodingType : CERT_QUERY_ENCODING_TYPE -> "int"
; pCertInfo : CERT_INFO* -> "var"
; pbKeyUsage : BYTE* out -> "var"
; cbKeyUsage : 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 CertGetIntendedKeyUsage(CERT_QUERY_ENCODING_TYPE dwCertEncodingType, CERT_INFO* pCertInfo, BYTE* pbKeyUsage, DWORD cbKeyUsage)
#uselib "CRYPT32.dll"
#cfunc global CertGetIntendedKeyUsage "CertGetIntendedKeyUsage" int, var, var, int
; res = CertGetIntendedKeyUsage(dwCertEncodingType, pCertInfo, pbKeyUsage, cbKeyUsage)
; dwCertEncodingType : CERT_QUERY_ENCODING_TYPE -> "int"
; pCertInfo : CERT_INFO* -> "var"
; pbKeyUsage : BYTE* out -> "var"
; cbKeyUsage : 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。

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

var (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCertGetIntendedKeyUsage = crypt32.NewProc("CertGetIntendedKeyUsage")
)

// dwCertEncodingType (CERT_QUERY_ENCODING_TYPE), pCertInfo (CERT_INFO*), pbKeyUsage (BYTE* out), cbKeyUsage (DWORD)
r1, _, err := procCertGetIntendedKeyUsage.Call(
	uintptr(dwCertEncodingType),
	uintptr(pCertInfo),
	uintptr(pbKeyUsage),
	uintptr(cbKeyUsage),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CertGetIntendedKeyUsage(
  dwCertEncodingType: DWORD;   // CERT_QUERY_ENCODING_TYPE
  pCertInfo: Pointer;   // CERT_INFO*
  pbKeyUsage: Pointer;   // BYTE* out
  cbKeyUsage: DWORD   // DWORD
): BOOL; stdcall;
  external 'CRYPT32.dll' name 'CertGetIntendedKeyUsage';

result := DllCall("CRYPT32\CertGetIntendedKeyUsage"
    , "UInt", dwCertEncodingType   ; CERT_QUERY_ENCODING_TYPE
    , "Ptr", pCertInfo   ; CERT_INFO*
    , "Ptr", pbKeyUsage   ; BYTE* out
    , "UInt", cbKeyUsage   ; DWORD
    , "Int")   ; return: BOOL

●CertGetIntendedKeyUsage(dwCertEncodingType, pCertInfo, pbKeyUsage, cbKeyUsage) = DLL("CRYPT32.dll", "bool CertGetIntendedKeyUsage(dword, void*, void*, dword)")
# 呼び出し: CertGetIntendedKeyUsage(dwCertEncodingType, pCertInfo, pbKeyUsage, cbKeyUsage)
# dwCertEncodingType : CERT_QUERY_ENCODING_TYPE -> "dword"
# pCertInfo : CERT_INFO* -> "void*"
# pbKeyUsage : BYTE* out -> "void*"
# cbKeyUsage : 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)。