CERT_KEY_ATTRIBUTES_INFO

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CRYPT_INTEGER_BLOB
{
    public uint cbData;
    public IntPtr pbData;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CRYPT_BIT_BLOB
{
    public uint cbData;
    public IntPtr pbData;
    public uint cUnusedBits;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CERT_KEY_ATTRIBUTES_INFO
{
    public CRYPT_INTEGER_BLOB KeyId;
    public CRYPT_BIT_BLOB IntendedKeyUsage;
    public IntPtr pPrivateKeyUsagePeriod;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure CRYPT_INTEGER_BLOB
    Public cbData As UInteger
    Public pbData As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure CRYPT_BIT_BLOB
    Public cbData As UInteger
    Public pbData As IntPtr
    Public cUnusedBits As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure CERT_KEY_ATTRIBUTES_INFO
    Public KeyId As CRYPT_INTEGER_BLOB
    Public IntendedKeyUsage As CRYPT_BIT_BLOB
    Public pPrivateKeyUsagePeriod As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class CRYPT_INTEGER_BLOB(ctypes.Structure):
    _fields_ = [
        ("cbData", wintypes.DWORD),
        ("pbData", ctypes.c_void_p),
    ]

class CRYPT_BIT_BLOB(ctypes.Structure):
    _fields_ = [
        ("cbData", wintypes.DWORD),
        ("pbData", ctypes.c_void_p),
        ("cUnusedBits", wintypes.DWORD),
    ]

class CERT_KEY_ATTRIBUTES_INFO(ctypes.Structure):
    _fields_ = [
        ("KeyId", CRYPT_INTEGER_BLOB),
        ("IntendedKeyUsage", CRYPT_BIT_BLOB),
        ("pPrivateKeyUsagePeriod", ctypes.c_void_p),
    ]

#[repr(C)]
pub struct CRYPT_INTEGER_BLOB {
    pub cbData: u32,
    pub pbData: *mut core::ffi::c_void,
}

#[repr(C)]
pub struct CRYPT_BIT_BLOB {
    pub cbData: u32,
    pub pbData: *mut core::ffi::c_void,
    pub cUnusedBits: u32,
}

#[repr(C)]
pub struct CERT_KEY_ATTRIBUTES_INFO {
    pub KeyId: CRYPT_INTEGER_BLOB,
    pub IntendedKeyUsage: CRYPT_BIT_BLOB,
    pub pPrivateKeyUsagePeriod: *mut core::ffi::c_void,
}

import "golang.org/x/sys/windows"

type CRYPT_INTEGER_BLOB struct {
	cbData uint32
	pbData uintptr
}

type CRYPT_BIT_BLOB struct {
	cbData uint32
	pbData uintptr
	cUnusedBits uint32
}

type CERT_KEY_ATTRIBUTES_INFO struct {
	KeyId CRYPT_INTEGER_BLOB
	IntendedKeyUsage CRYPT_BIT_BLOB
	pPrivateKeyUsagePeriod uintptr
}

type
  CRYPT_INTEGER_BLOB = record
    cbData: DWORD;
    pbData: Pointer;
  end;

  CRYPT_BIT_BLOB = record
    cbData: DWORD;
    pbData: Pointer;
    cUnusedBits: DWORD;
  end;

  CERT_KEY_ATTRIBUTES_INFO = record
    KeyId: CRYPT_INTEGER_BLOB;
    IntendedKeyUsage: CRYPT_BIT_BLOB;
    pPrivateKeyUsagePeriod: Pointer;
  end;

const CRYPT_INTEGER_BLOB = extern struct {
    cbData: u32,
    pbData: ?*anyopaque,
};

const CRYPT_BIT_BLOB = extern struct {
    cbData: u32,
    pbData: ?*anyopaque,
    cUnusedBits: u32,
};

const CERT_KEY_ATTRIBUTES_INFO = extern struct {
    KeyId: CRYPT_INTEGER_BLOB,
    IntendedKeyUsage: CRYPT_BIT_BLOB,
    pPrivateKeyUsagePeriod: ?*anyopaque,
};

type
  CRYPT_INTEGER_BLOB {.bycopy.} = object
    cbData: uint32
    pbData: pointer

  CRYPT_BIT_BLOB {.bycopy.} = object
    cbData: uint32
    pbData: pointer
    cUnusedBits: uint32

  CERT_KEY_ATTRIBUTES_INFO {.bycopy.} = object
    KeyId: CRYPT_INTEGER_BLOB
    IntendedKeyUsage: CRYPT_BIT_BLOB
    pPrivateKeyUsagePeriod: pointer

struct CRYPT_INTEGER_BLOB
{
    uint cbData;
    void* pbData;
}

struct CRYPT_BIT_BLOB
{
    uint cbData;
    void* pbData;
    uint cUnusedBits;
}

struct CERT_KEY_ATTRIBUTES_INFO
{
    CRYPT_INTEGER_BLOB KeyId;
    CRYPT_BIT_BLOB IntendedKeyUsage;
    void* pPrivateKeyUsagePeriod;
}