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CertIsWeakHash

関数

署名に使われたハッシュが脆弱とみなされるか判定する。

DLLCRYPT32.dll呼出規約winapi

シグネチャ

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

BOOL CertIsWeakHash(
    DWORD dwHashUseType,
    LPCWSTR pwszCNGHashAlgid,
    DWORD dwChainFlags,
    CERT_CHAIN_CONTEXT* pSignerChainContext,   // optional
    FILETIME* pTimeStamp,   // optional
    LPCWSTR pwszFileName   // optional
);

パラメーター

名前	型	方向
dwHashUseType	DWORD	in
pwszCNGHashAlgid	LPCWSTR	in
dwChainFlags	DWORD	in
pSignerChainContext	CERT_CHAIN_CONTEXT*	inoptional
pTimeStamp	FILETIME*	inoptional
pwszFileName	LPCWSTR	inoptional

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL CertIsWeakHash(
    DWORD dwHashUseType,
    LPCWSTR pwszCNGHashAlgid,
    DWORD dwChainFlags,
    CERT_CHAIN_CONTEXT* pSignerChainContext,   // optional
    FILETIME* pTimeStamp,   // optional
    LPCWSTR pwszFileName   // optional
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", ExactSpelling = true)]
static extern bool CertIsWeakHash(
    uint dwHashUseType,   // DWORD
    [MarshalAs(UnmanagedType.LPWStr)] string pwszCNGHashAlgid,   // LPCWSTR
    uint dwChainFlags,   // DWORD
    IntPtr pSignerChainContext,   // CERT_CHAIN_CONTEXT* optional
    IntPtr pTimeStamp,   // FILETIME* optional
    [MarshalAs(UnmanagedType.LPWStr)] string pwszFileName   // LPCWSTR optional
);

<DllImport("CRYPT32.dll", ExactSpelling:=True)>
Public Shared Function CertIsWeakHash(
    dwHashUseType As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> pwszCNGHashAlgid As String,   ' LPCWSTR
    dwChainFlags As UInteger,   ' DWORD
    pSignerChainContext As IntPtr,   ' CERT_CHAIN_CONTEXT* optional
    pTimeStamp As IntPtr,   ' FILETIME* optional
    <MarshalAs(UnmanagedType.LPWStr)> pwszFileName As String   ' LPCWSTR optional
) As Boolean
End Function

' dwHashUseType : DWORD
' pwszCNGHashAlgid : LPCWSTR
' dwChainFlags : DWORD
' pSignerChainContext : CERT_CHAIN_CONTEXT* optional
' pTimeStamp : FILETIME* optional
' pwszFileName : LPCWSTR optional
Declare PtrSafe Function CertIsWeakHash Lib "crypt32" ( _
    ByVal dwHashUseType As Long, _
    ByVal pwszCNGHashAlgid As LongPtr, _
    ByVal dwChainFlags As Long, _
    ByVal pSignerChainContext As LongPtr, _
    ByVal pTimeStamp As LongPtr, _
    ByVal pwszFileName As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CertIsWeakHash = ctypes.windll.crypt32.CertIsWeakHash
CertIsWeakHash.restype = wintypes.BOOL
CertIsWeakHash.argtypes = [
    wintypes.DWORD,  # dwHashUseType : DWORD
    wintypes.LPCWSTR,  # pwszCNGHashAlgid : LPCWSTR
    wintypes.DWORD,  # dwChainFlags : DWORD
    ctypes.c_void_p,  # pSignerChainContext : CERT_CHAIN_CONTEXT* optional
    ctypes.c_void_p,  # pTimeStamp : FILETIME* optional
    wintypes.LPCWSTR,  # pwszFileName : LPCWSTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CertIsWeakHash = Fiddle::Function.new(
  lib['CertIsWeakHash'],
  [
    -Fiddle::TYPE_INT,  # dwHashUseType : DWORD
    Fiddle::TYPE_VOIDP,  # pwszCNGHashAlgid : LPCWSTR
    -Fiddle::TYPE_INT,  # dwChainFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pSignerChainContext : CERT_CHAIN_CONTEXT* optional
    Fiddle::TYPE_VOIDP,  # pTimeStamp : FILETIME* optional
    Fiddle::TYPE_VOIDP,  # pwszFileName : LPCWSTR optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CertIsWeakHash(
        dwHashUseType: u32,  // DWORD
        pwszCNGHashAlgid: *const u16,  // LPCWSTR
        dwChainFlags: u32,  // DWORD
        pSignerChainContext: *mut CERT_CHAIN_CONTEXT,  // CERT_CHAIN_CONTEXT* optional
        pTimeStamp: *mut FILETIME,  // FILETIME* optional
        pwszFileName: *const u16  // LPCWSTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll")]
public static extern bool CertIsWeakHash(uint dwHashUseType, [MarshalAs(UnmanagedType.LPWStr)] string pwszCNGHashAlgid, uint dwChainFlags, IntPtr pSignerChainContext, IntPtr pTimeStamp, [MarshalAs(UnmanagedType.LPWStr)] string pwszFileName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CertIsWeakHash' -Namespace Win32 -PassThru
# $api::CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, pSignerChainContext, pTimeStamp, pwszFileName)

#uselib "CRYPT32.dll"
#func global CertIsWeakHash "CertIsWeakHash" sptr, sptr, sptr, sptr, sptr, sptr
; CertIsWeakHash dwHashUseType, pwszCNGHashAlgid, dwChainFlags, varptr(pSignerChainContext), varptr(pTimeStamp), pwszFileName   ; 戻り値は stat
; dwHashUseType : DWORD -> "sptr"
; pwszCNGHashAlgid : LPCWSTR -> "sptr"
; dwChainFlags : DWORD -> "sptr"
; pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "sptr"
; pTimeStamp : FILETIME* optional -> "sptr"
; pwszFileName : LPCWSTR 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 CertIsWeakHash "CertIsWeakHash" int, wstr, int, var, var, wstr
; res = CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, pSignerChainContext, pTimeStamp, pwszFileName)
; dwHashUseType : DWORD -> "int"
; pwszCNGHashAlgid : LPCWSTR -> "wstr"
; dwChainFlags : DWORD -> "int"
; pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "var"
; pTimeStamp : FILETIME* optional -> "var"
; pwszFileName : LPCWSTR optional -> "wstr"
; ※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 CertIsWeakHash "CertIsWeakHash" int, wstr, int, sptr, sptr, wstr
; res = CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, varptr(pSignerChainContext), varptr(pTimeStamp), pwszFileName)
; dwHashUseType : DWORD -> "int"
; pwszCNGHashAlgid : LPCWSTR -> "wstr"
; dwChainFlags : DWORD -> "int"
; pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "sptr"
; pTimeStamp : FILETIME* optional -> "sptr"
; pwszFileName : LPCWSTR optional -> "wstr"
; ※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 CertIsWeakHash(DWORD dwHashUseType, LPCWSTR pwszCNGHashAlgid, DWORD dwChainFlags, CERT_CHAIN_CONTEXT* pSignerChainContext, FILETIME* pTimeStamp, LPCWSTR pwszFileName)
#uselib "CRYPT32.dll"
#cfunc global CertIsWeakHash "CertIsWeakHash" int, wstr, int, var, var, wstr
; res = CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, pSignerChainContext, pTimeStamp, pwszFileName)
; dwHashUseType : DWORD -> "int"
; pwszCNGHashAlgid : LPCWSTR -> "wstr"
; dwChainFlags : DWORD -> "int"
; pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "var"
; pTimeStamp : FILETIME* optional -> "var"
; pwszFileName : LPCWSTR optional -> "wstr"
; ※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 CertIsWeakHash(DWORD dwHashUseType, LPCWSTR pwszCNGHashAlgid, DWORD dwChainFlags, CERT_CHAIN_CONTEXT* pSignerChainContext, FILETIME* pTimeStamp, LPCWSTR pwszFileName)
#uselib "CRYPT32.dll"
#cfunc global CertIsWeakHash "CertIsWeakHash" int, wstr, int, intptr, intptr, wstr
; res = CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, varptr(pSignerChainContext), varptr(pTimeStamp), pwszFileName)
; dwHashUseType : DWORD -> "int"
; pwszCNGHashAlgid : LPCWSTR -> "wstr"
; dwChainFlags : DWORD -> "int"
; pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "intptr"
; pTimeStamp : FILETIME* optional -> "intptr"
; pwszFileName : LPCWSTR optional -> "wstr"
; ※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")
	procCertIsWeakHash = crypt32.NewProc("CertIsWeakHash")
)

// dwHashUseType (DWORD), pwszCNGHashAlgid (LPCWSTR), dwChainFlags (DWORD), pSignerChainContext (CERT_CHAIN_CONTEXT* optional), pTimeStamp (FILETIME* optional), pwszFileName (LPCWSTR optional)
r1, _, err := procCertIsWeakHash.Call(
	uintptr(dwHashUseType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszCNGHashAlgid))),
	uintptr(dwChainFlags),
	uintptr(pSignerChainContext),
	uintptr(pTimeStamp),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszFileName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CertIsWeakHash(
  dwHashUseType: DWORD;   // DWORD
  pwszCNGHashAlgid: PWideChar;   // LPCWSTR
  dwChainFlags: DWORD;   // DWORD
  pSignerChainContext: Pointer;   // CERT_CHAIN_CONTEXT* optional
  pTimeStamp: Pointer;   // FILETIME* optional
  pwszFileName: PWideChar   // LPCWSTR optional
): BOOL; stdcall;
  external 'CRYPT32.dll' name 'CertIsWeakHash';

result := DllCall("CRYPT32\CertIsWeakHash"
    , "UInt", dwHashUseType   ; DWORD
    , "WStr", pwszCNGHashAlgid   ; LPCWSTR
    , "UInt", dwChainFlags   ; DWORD
    , "Ptr", pSignerChainContext   ; CERT_CHAIN_CONTEXT* optional
    , "Ptr", pTimeStamp   ; FILETIME* optional
    , "WStr", pwszFileName   ; LPCWSTR optional
    , "Int")   ; return: BOOL

●CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, pSignerChainContext, pTimeStamp, pwszFileName) = DLL("CRYPT32.dll", "bool CertIsWeakHash(dword, char*, dword, void*, void*, char*)")
# 呼び出し: CertIsWeakHash(dwHashUseType, pwszCNGHashAlgid, dwChainFlags, pSignerChainContext, pTimeStamp, pwszFileName)
# dwHashUseType : DWORD -> "dword"
# pwszCNGHashAlgid : LPCWSTR -> "char*"
# dwChainFlags : DWORD -> "dword"
# pSignerChainContext : CERT_CHAIN_CONTEXT* optional -> "void*"
# pTimeStamp : FILETIME* optional -> "void*"
# pwszFileName : LPCWSTR optional -> "char*"
# 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)。