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CryptVerifySignatureW

関数

公開鍵を使いハッシュのデジタル署名を検証する(Unicode版)。

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

シグネチャ

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CryptVerifySignatureW(
    UINT_PTR hHash,
    const BYTE* pbSignature,
    DWORD dwSigLen,
    UINT_PTR hPubKey,
    LPCWSTR szDescription,   // optional
    DWORD dwFlags
);

パラメーター

名前	型	方向	説明
hHash	UINT_PTR	in	検証対象のハッシュ値を保持するハッシュハンドル。
pbSignature	BYTE*	in	検証する署名データのバッファへのポインタ。
dwSigLen	DWORD	in	署名データのバイト数。
hPubKey	UINT_PTR	in	署名検証に使う公開鍵のハンドル。
szDescription	LPCWSTR	inoptional	署名生成時に指定した説明文字列(Unicode)。通常はNULL。
dwFlags	DWORD	in	検証フラグ。CRYPT_NOHASHOID等を指定する。

戻り値の型: BOOL

各言語での呼び出し定義

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CryptVerifySignatureW(
    UINT_PTR hHash,
    const BYTE* pbSignature,
    DWORD dwSigLen,
    UINT_PTR hPubKey,
    LPCWSTR szDescription,   // optional
    DWORD dwFlags
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
static extern bool CryptVerifySignatureW(
    UIntPtr hHash,   // UINT_PTR
    IntPtr pbSignature,   // BYTE*
    uint dwSigLen,   // DWORD
    UIntPtr hPubKey,   // UINT_PTR
    [MarshalAs(UnmanagedType.LPWStr)] string szDescription,   // LPCWSTR optional
    uint dwFlags   // DWORD
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptVerifySignatureW(
    hHash As UIntPtr,   ' UINT_PTR
    pbSignature As IntPtr,   ' BYTE*
    dwSigLen As UInteger,   ' DWORD
    hPubKey As UIntPtr,   ' UINT_PTR
    <MarshalAs(UnmanagedType.LPWStr)> szDescription As String,   ' LPCWSTR optional
    dwFlags As UInteger   ' DWORD
) As Boolean
End Function

' hHash : UINT_PTR
' pbSignature : BYTE*
' dwSigLen : DWORD
' hPubKey : UINT_PTR
' szDescription : LPCWSTR optional
' dwFlags : DWORD
Declare PtrSafe Function CryptVerifySignatureW Lib "advapi32" ( _
    ByVal hHash As LongPtr, _
    ByVal pbSignature As LongPtr, _
    ByVal dwSigLen As Long, _
    ByVal hPubKey As LongPtr, _
    ByVal szDescription As LongPtr, _
    ByVal dwFlags As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CryptVerifySignatureW = ctypes.windll.advapi32.CryptVerifySignatureW
CryptVerifySignatureW.restype = wintypes.BOOL
CryptVerifySignatureW.argtypes = [
    ctypes.c_size_t,  # hHash : UINT_PTR
    ctypes.POINTER(ctypes.c_ubyte),  # pbSignature : BYTE*
    wintypes.DWORD,  # dwSigLen : DWORD
    ctypes.c_size_t,  # hPubKey : UINT_PTR
    wintypes.LPCWSTR,  # szDescription : LPCWSTR optional
    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')
CryptVerifySignatureW = Fiddle::Function.new(
  lib['CryptVerifySignatureW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hHash : UINT_PTR
    Fiddle::TYPE_VOIDP,  # pbSignature : BYTE*
    -Fiddle::TYPE_INT,  # dwSigLen : DWORD
    Fiddle::TYPE_UINTPTR_T,  # hPubKey : UINT_PTR
    Fiddle::TYPE_VOIDP,  # szDescription : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn CryptVerifySignatureW(
        hHash: usize,  // UINT_PTR
        pbSignature: *const u8,  // BYTE*
        dwSigLen: u32,  // DWORD
        hPubKey: usize,  // UINT_PTR
        szDescription: *const u16,  // LPCWSTR optional
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CryptVerifySignatureW(UIntPtr hHash, IntPtr pbSignature, uint dwSigLen, UIntPtr hPubKey, [MarshalAs(UnmanagedType.LPWStr)] string szDescription, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CryptVerifySignatureW' -Namespace Win32 -PassThru
# $api::CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, szDescription, dwFlags)

#uselib "ADVAPI32.dll"
#func global CryptVerifySignatureW "CryptVerifySignatureW" wptr, wptr, wptr, wptr, wptr, wptr
; CryptVerifySignatureW hHash, varptr(pbSignature), dwSigLen, hPubKey, szDescription, dwFlags   ; 戻り値は stat
; hHash : UINT_PTR -> "wptr"
; pbSignature : BYTE* -> "wptr"
; dwSigLen : DWORD -> "wptr"
; hPubKey : UINT_PTR -> "wptr"
; szDescription : LPCWSTR optional -> "wptr"
; dwFlags : DWORD -> "wptr"
; ※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 CryptVerifySignatureW "CryptVerifySignatureW" sptr, var, int, sptr, wstr, int
; res = CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, szDescription, dwFlags)
; hHash : UINT_PTR -> "sptr"
; pbSignature : BYTE* -> "var"
; dwSigLen : DWORD -> "int"
; hPubKey : UINT_PTR -> "sptr"
; szDescription : LPCWSTR optional -> "wstr"
; 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 CryptVerifySignatureW "CryptVerifySignatureW" sptr, sptr, int, sptr, wstr, int
; res = CryptVerifySignatureW(hHash, varptr(pbSignature), dwSigLen, hPubKey, szDescription, dwFlags)
; hHash : UINT_PTR -> "sptr"
; pbSignature : BYTE* -> "sptr"
; dwSigLen : DWORD -> "int"
; hPubKey : UINT_PTR -> "sptr"
; szDescription : LPCWSTR optional -> "wstr"
; 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 CryptVerifySignatureW(UINT_PTR hHash, BYTE* pbSignature, DWORD dwSigLen, UINT_PTR hPubKey, LPCWSTR szDescription, DWORD dwFlags)
#uselib "ADVAPI32.dll"
#cfunc global CryptVerifySignatureW "CryptVerifySignatureW" intptr, var, int, intptr, wstr, int
; res = CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, szDescription, dwFlags)
; hHash : UINT_PTR -> "intptr"
; pbSignature : BYTE* -> "var"
; dwSigLen : DWORD -> "int"
; hPubKey : UINT_PTR -> "intptr"
; szDescription : LPCWSTR optional -> "wstr"
; 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 CryptVerifySignatureW(UINT_PTR hHash, BYTE* pbSignature, DWORD dwSigLen, UINT_PTR hPubKey, LPCWSTR szDescription, DWORD dwFlags)
#uselib "ADVAPI32.dll"
#cfunc global CryptVerifySignatureW "CryptVerifySignatureW" intptr, intptr, int, intptr, wstr, int
; res = CryptVerifySignatureW(hHash, varptr(pbSignature), dwSigLen, hPubKey, szDescription, dwFlags)
; hHash : UINT_PTR -> "intptr"
; pbSignature : BYTE* -> "intptr"
; dwSigLen : DWORD -> "int"
; hPubKey : UINT_PTR -> "intptr"
; szDescription : LPCWSTR optional -> "wstr"
; 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")
	procCryptVerifySignatureW = advapi32.NewProc("CryptVerifySignatureW")
)

// hHash (UINT_PTR), pbSignature (BYTE*), dwSigLen (DWORD), hPubKey (UINT_PTR), szDescription (LPCWSTR optional), dwFlags (DWORD)
r1, _, err := procCryptVerifySignatureW.Call(
	uintptr(hHash),
	uintptr(pbSignature),
	uintptr(dwSigLen),
	uintptr(hPubKey),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szDescription))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CryptVerifySignatureW(
  hHash: NativeUInt;   // UINT_PTR
  pbSignature: Pointer;   // BYTE*
  dwSigLen: DWORD;   // DWORD
  hPubKey: NativeUInt;   // UINT_PTR
  szDescription: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD   // DWORD
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CryptVerifySignatureW';

result := DllCall("ADVAPI32\CryptVerifySignatureW"
    , "UPtr", hHash   ; UINT_PTR
    , "Ptr", pbSignature   ; BYTE*
    , "UInt", dwSigLen   ; DWORD
    , "UPtr", hPubKey   ; UINT_PTR
    , "WStr", szDescription   ; LPCWSTR optional
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: BOOL

●CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, szDescription, dwFlags) = DLL("ADVAPI32.dll", "bool CryptVerifySignatureW(int, void*, dword, int, char*, dword)")
# 呼び出し: CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, szDescription, dwFlags)
# hHash : UINT_PTR -> "int"
# pbSignature : BYTE* -> "void*"
# dwSigLen : DWORD -> "dword"
# hPubKey : UINT_PTR -> "int"
# szDescription : LPCWSTR optional -> "char*"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。