MsiGetFileSignatureInformationW

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

HRESULT MsiGetFileSignatureInformationW(
    LPCWSTR szSignedObjectPath,
    DWORD dwFlags,
    CERT_CONTEXT** ppcCertContext,
    BYTE* pbHashData,   // optional
    DWORD* pcbHashData   // optional
);

<DllImport("msi.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function MsiGetFileSignatureInformationW(
    <MarshalAs(UnmanagedType.LPWStr)> szSignedObjectPath As String,   ' LPCWSTR
    dwFlags As UInteger,   ' DWORD
    ppcCertContext As IntPtr,   ' CERT_CONTEXT** out
    pbHashData As IntPtr,   ' BYTE* optional, out
    pcbHashData As IntPtr   ' DWORD* optional, in/out
) As Integer
End Function

' szSignedObjectPath : LPCWSTR
' dwFlags : DWORD
' ppcCertContext : CERT_CONTEXT** out
' pbHashData : BYTE* optional, out
' pcbHashData : DWORD* optional, in/out
Declare PtrSafe Function MsiGetFileSignatureInformationW Lib "msi" ( _
    ByVal szSignedObjectPath As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal ppcCertContext As LongPtr, _
    ByVal pbHashData As LongPtr, _
    ByVal pcbHashData As LongPtr) 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

MsiGetFileSignatureInformationW = ctypes.windll.msi.MsiGetFileSignatureInformationW
MsiGetFileSignatureInformationW.restype = ctypes.c_int
MsiGetFileSignatureInformationW.argtypes = [
    wintypes.LPCWSTR,  # szSignedObjectPath : LPCWSTR
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # ppcCertContext : CERT_CONTEXT** out
    ctypes.POINTER(ctypes.c_ubyte),  # pbHashData : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcbHashData : DWORD* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiGetFileSignatureInformationW = Fiddle::Function.new(
  lib['MsiGetFileSignatureInformationW'],
  [
    Fiddle::TYPE_VOIDP,  # szSignedObjectPath : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # ppcCertContext : CERT_CONTEXT** out
    Fiddle::TYPE_VOIDP,  # pbHashData : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # pcbHashData : DWORD* optional, in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "msi")]
extern "system" {
    fn MsiGetFileSignatureInformationW(
        szSignedObjectPath: *const u16,  // LPCWSTR
        dwFlags: u32,  // DWORD
        ppcCertContext: *mut *mut CERT_CONTEXT,  // CERT_CONTEXT** out
        pbHashData: *mut u8,  // BYTE* optional, out
        pcbHashData: *mut u32  // DWORD* optional, in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Unicode)]
public static extern int MsiGetFileSignatureInformationW([MarshalAs(UnmanagedType.LPWStr)] string szSignedObjectPath, uint dwFlags, IntPtr ppcCertContext, IntPtr pbHashData, IntPtr pcbHashData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiGetFileSignatureInformationW' -Namespace Win32 -PassThru
# $api::MsiGetFileSignatureInformationW(szSignedObjectPath, dwFlags, ppcCertContext, pbHashData, pcbHashData)

#uselib "msi.dll"
#func global MsiGetFileSignatureInformationW "MsiGetFileSignatureInformationW" wptr, wptr, wptr, wptr, wptr
; MsiGetFileSignatureInformationW szSignedObjectPath, dwFlags, varptr(ppcCertContext), varptr(pbHashData), varptr(pcbHashData)   ; 戻り値は stat
; szSignedObjectPath : LPCWSTR -> "wptr"
; dwFlags : DWORD -> "wptr"
; ppcCertContext : CERT_CONTEXT** out -> "wptr"
; pbHashData : BYTE* optional, out -> "wptr"
; pcbHashData : DWORD* optional, in/out -> "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。

#uselib "msi.dll"
#cfunc global MsiGetFileSignatureInformationW "MsiGetFileSignatureInformationW" wstr, int, var, var, var
; res = MsiGetFileSignatureInformationW(szSignedObjectPath, dwFlags, ppcCertContext, pbHashData, pcbHashData)
; szSignedObjectPath : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"
; ppcCertContext : CERT_CONTEXT** out -> "var"
; pbHashData : BYTE* optional, out -> "var"
; pcbHashData : DWORD* optional, in/out -> "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。

; HRESULT MsiGetFileSignatureInformationW(LPCWSTR szSignedObjectPath, DWORD dwFlags, CERT_CONTEXT** ppcCertContext, BYTE* pbHashData, DWORD* pcbHashData)
#uselib "msi.dll"
#cfunc global MsiGetFileSignatureInformationW "MsiGetFileSignatureInformationW" wstr, int, var, var, var
; res = MsiGetFileSignatureInformationW(szSignedObjectPath, dwFlags, ppcCertContext, pbHashData, pcbHashData)
; szSignedObjectPath : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"
; ppcCertContext : CERT_CONTEXT** out -> "var"
; pbHashData : BYTE* optional, out -> "var"
; pcbHashData : DWORD* optional, in/out -> "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 (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiGetFileSignatureInformationW = msi.NewProc("MsiGetFileSignatureInformationW")
)

// szSignedObjectPath (LPCWSTR), dwFlags (DWORD), ppcCertContext (CERT_CONTEXT** out), pbHashData (BYTE* optional, out), pcbHashData (DWORD* optional, in/out)
r1, _, err := procMsiGetFileSignatureInformationW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szSignedObjectPath))),
	uintptr(dwFlags),
	uintptr(ppcCertContext),
	uintptr(pbHashData),
	uintptr(pcbHashData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MsiGetFileSignatureInformationW(
  szSignedObjectPath: PWideChar;   // LPCWSTR
  dwFlags: DWORD;   // DWORD
  ppcCertContext: Pointer;   // CERT_CONTEXT** out
  pbHashData: Pointer;   // BYTE* optional, out
  pcbHashData: Pointer   // DWORD* optional, in/out
): Integer; stdcall;
  external 'msi.dll' name 'MsiGetFileSignatureInformationW';

result := DllCall("msi\MsiGetFileSignatureInformationW"
    , "WStr", szSignedObjectPath   ; LPCWSTR
    , "UInt", dwFlags   ; DWORD
    , "Ptr", ppcCertContext   ; CERT_CONTEXT** out
    , "Ptr", pbHashData   ; BYTE* optional, out
    , "Ptr", pcbHashData   ; DWORD* optional, in/out
    , "Int")   ; return: HRESULT

●MsiGetFileSignatureInformationW(szSignedObjectPath, dwFlags, ppcCertContext, pbHashData, pcbHashData) = DLL("msi.dll", "int MsiGetFileSignatureInformationW(char*, dword, void*, void*, void*)")
# 呼び出し: MsiGetFileSignatureInformationW(szSignedObjectPath, dwFlags, ppcCertContext, pbHashData, pcbHashData)
# szSignedObjectPath : LPCWSTR -> "char*"
# dwFlags : DWORD -> "dword"
# ppcCertContext : CERT_CONTEXT** out -> "void*"
# pbHashData : BYTE* optional, out -> "void*"
# pcbHashData : DWORD* optional, in/out -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。