#####################################################################
# ExportCertificate_ps1.0.ps1
# Version 1.6
#
# Exports signing certificates from files using file context menu
#
# Require PowerShell V2, not compatible with PowerShell 1.0
#
# Vadims Podans (c) 2009
# http://www.sysadmins.lv/
#####################################################################
#requires -Version 2.0

$FilePath = Read-Host "Укажите путь для размещения ExportCertificate.PS1"
if (Test-Path -LiteralPath $FilePath) {
	$FilePath = Join-Path $FilePath "ExportCertificate.ps1"
	$RegPath = "Registry::HKLM\Software\Classes\*\Shell\Export Certificate\command"
	$RegValue = "C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe -noninteractive -nologo -noprofile -command $FilePath '%1'"
	New-Item -Path $RegPath -Force
	if (Test-Path -LiteralPath $RegPath) {
		New-ItemProperty -LiteralPath $RegPath -Name "(Default)" -Value $RegValue -Force
		New-Item -ItemType file -Path $FilePath -Force -ErrorAction SilentlyContinue
		if (Test-Path -LiteralPath $FilePath) {
			$exefile = @'
param ($file)
$cp = new-object Microsoft.CSharp.CSharpCodeProvider
$cpar = New-Object System.CodeDom.Compiler.CompilerParameters
$HideWindow = 0x0080
$ShowWindow = 0x0040
$Code = @"
using System;
using System.Runtime.InteropServices;
namespace Win32API
{
    public class Window
    {
        [DllImport("user32.dll")]
        public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags);
    }
}
"@
$cp.CompileAssemblyFromSource($cpar, $code)
$PSHandle = (Get-Process –id $pid).MainWindowHandle
[Win32API.Window]::SetWindowPos($PSHandle, 0, 0, 0, 0, 0, $HideWindow)
$item = gi $file
$type = [System.Security.Cryptography.X509Certificates.X509ContentType]::Cert
$folder = (Get-ItemProperty "HKCU:\software\microsoft\windows\currentversion\explorer\shell folders" -Name personal).personal
$target = Join-Path $folder $item.name
function _msgbox_ ($title, $text, $type = "None") {
	[void][reflection.assembly]::LoadWithPartialName("System.Windows.Forms")
	$msg = [Windows.Forms.MessageBox]::Show($text, $title, [Windows.Forms.MessageBoxButtons]::ok,
	[Windows.Forms.MessageBoxIcon]::$type)
}
$status = Get-AuthenticodeSignature "$file"
switch ($status.status) {
"Valid" {_msgbox_ -title "Valid Certificate" -text "Here is valid certificate. Press Ok to export it to MyDocs folder."
			$bytes = $status.SignerCertificate.export($type)
			[IO.File]::WriteAllBytes(($target + ".cer"),$bytes)}
"HashMismatch" {_msgbox_ -title "Hash mismatch" -type "Error" -text $status.statusmessage}
"NotSigned" {_msgbox_ -title "No certificate" -type "Warning" -text $status.statusmessage}
default {_msgbox_ -title "Unknown error" -type "Error" -text $status.statusmessage}
}
'@
			Set-Content -Path $FilePath -Value $exefile -Force
		} else {
			Write-Warning "Unable to create file in: $FilePath. Path is incorrect or you haven't sufficient permissions"
		}
	} else {
		Write-Warning "Unable to create registry key. May be you haven't sufficient permissions to HKLM hive"
	}
} else {Write-Warning "Source Folder must exist"}

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