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@echo off
:: IKEv2 Configuration Import Helper Script for Windows 8, 10 and 11
:: Copyright (C) 2022 Lin Song <linsongui@gmail.com>
:: This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
:: Unported License: http://creativecommons.org/licenses/by-sa/3.0/
:: Attribution required: please include my name in any derivative and let me
:: know how you have improved it!
setlocal DisableDelayedExpansion
set "SPath=%SystemRoot%\System32"
if exist "%SystemRoot%\Sysnative\reg.exe" (set "SPath=%SystemRoot%\Sysnative")
set "Path=%SPath%;%SystemRoot%;%SPath%\Wbem;%SPath%\WindowsPowerShell\v1.0"
set "_err====== ERROR ====="
set "_work=%~dp0"
if "%_work:~-1%"=="" set "_work=%_work:~0,-1%"
for /f "tokens=4-5 delims=. " %%i in ('ver') do set version=%%i.%%j
if "%version%" == "10.0" goto :Check_Admin
if "%version%" == "6.3" goto :Check_Admin
if "%version%" == "6.2" goto :Check_Admin
goto :E_Win
:Check_Admin
reg query HKU\S-1-5-19 >nul 2>&1 || goto :E_Admin
where certutil >nul 2>&1
if %errorlevel% neq 0 goto :E_Cu
where powershell >nul 2>&1
if %errorlevel% neq 0 goto :E_Ps
title IKEv2 Configuration Import Helper Script
setlocal EnableDelayedExpansion
cd /d "!_work!"
@cls
echo ===================================================================
echo Welcome^^! Use this helper script to import an IKEv2 configuration
echo into a PC running Windows 8, 10 or 11.
echo For more details, see https://vpnsetup.net/ikev2
echo.
echo Before continuing, you must put the .p12 file you transferred from
echo the VPN server in the *same folder* as this script.
echo ===================================================================
set client_name_gen=
for /F "eol=| delims=" %%f in ('dir "*.p12" /A-D /B /O-D /TW 2^>nul') do (
set "p12_latest=%%f"
set "client_name_gen=!p12_latest:.p12=!"
goto :Enter_Client_Name
)
:Enter_Client_Name
echo.
echo Enter the name of the IKEv2 VPN client to import.
echo Note: This is the same as the .p12 filename without extension.
set client_name=
set p12_file=
if defined client_name_gen (
echo To accept the suggested client name, press Enter.
set /p client_name="VPN client name: [%client_name_gen%] "
if not defined client_name set "client_name=%client_name_gen%"
) else (
set /p client_name="VPN client name: "
if not defined client_name goto :Abort
)
set "client_name=%client_name:"=%"
set "client_name=%client_name: =%"
set "p12_file=%_work%\%client_name%.p12"
if not exist "!p12_file!" (
echo.
echo ERROR: File "!p12_file!" not found.
echo You must put the .p12 file you transferred from the VPN server
echo in the *same folder* as this script.
goto :Enter_Client_Name
)
echo.
echo Enter the IP address (or DNS name) of the VPN server.
echo Note: This must exactly match the VPN server address in the output
echo of the IKEv2 helper script on your server.
set server_addr=
set /p server_addr="VPN server address: "
if not defined server_addr goto :Abort
set "server_addr=%server_addr:"=%"
set "server_addr=%server_addr: =%"
set "conn_name_gen=IKEv2 VPN %server_addr%"
powershell -command "Get-VpnConnection -Name '%conn_name_gen%'" >nul 2>&1
if !errorlevel! neq 0 (
goto :Enter_Conn_Name
)
set "conn_name_gen=IKEv2 VPN 2 %server_addr%"
powershell -command "Get-VpnConnection -Name '%conn_name_gen%'" >nul 2>&1
if !errorlevel! neq 0 (
goto :Enter_Conn_Name
)
set "conn_name_gen=IKEv2 VPN 3 %server_addr%"
powershell -command "Get-VpnConnection -Name '%conn_name_gen%'" >nul 2>&1
if !errorlevel! equ 0 (
set conn_name_gen=
)
:Enter_Conn_Name
echo.
echo Provide a name for the new IKEv2 connection.
set conn_name=
if defined conn_name_gen (
echo To accept the suggested connection name, press Enter.
set /p conn_name="IKEv2 connection name: [%conn_name_gen%] "
if not defined conn_name set "conn_name=%conn_name_gen%"
) else (
set /p conn_name="IKEv2 connection name: "
if not defined conn_name goto :Abort
)
set "conn_name=%conn_name:"=%"
powershell -command "Get-VpnConnection -Name '%conn_name%'" >nul 2>&1
if !errorlevel! equ 0 (
echo.
echo ERROR: A connection with this name already exists.
goto :Enter_Conn_Name
)
echo.
echo Importing .p12 file...
certutil -f -p "" -importpfx "%p12_file%" NoExport >nul 2>&1
if !errorlevel! equ 0 goto :Create_Conn
echo When prompted, enter the password for client config files, which can be found
echo in the output of the IKEv2 helper script on your server.
:Import_P12
certutil -f -importpfx "%p12_file%" NoExport
if !errorlevel! neq 0 goto :Import_P12
:Create_Conn
echo.
echo Creating VPN connection...
powershell -command "Add-VpnConnection -ServerAddress '%server_addr%' -Name '%conn_name%' -TunnelType IKEv2 -AuthenticationMethod MachineCertificate -EncryptionLevel Required -PassThru"
if !errorlevel! neq 0 (
echo ERROR: Could not create the IKEv2 VPN connection.
goto :Done
)
echo Setting IPsec configuration...
powershell -command "Set-VpnConnectionIPsecConfiguration -ConnectionName '%conn_name%' -AuthenticationTransformConstants GCMAES128 -CipherTransformConstants GCMAES128 -EncryptionMethod AES256 -IntegrityCheckMethod SHA256 -PfsGroup None -DHGroup Group14 -PassThru -Force"
if !errorlevel! neq 0 (
echo ERROR: Could not set IPsec configuration for the IKEv2 VPN connection.
goto :Done
)
echo IKEv2 configuration successfully imported^^!
echo To connect to the VPN, click on the wireless/network icon in your system tray,
echo select the "%conn_name%" VPN entry, and click Connect.
goto :Done
:E_Admin
echo %_err%
echo This script requires administrator privileges.
echo Right-click on the script and select 'Run as administrator'.
goto :Done
:E_Win
echo %_err%
echo This script requires Windows 8, 10 or 11.
echo Windows 7 users can manually import IKEv2 configuration. See https://vpnsetup.net/ikev2
goto :Done
:E_Cu
echo %_err%
echo This script requires 'certutil', which is not detected.
goto :Done
:E_Ps
echo %_err%
echo This script requires 'powershell', which is not detected.
goto :Done
:Abort
echo.
echo Abort. No changes were made.
:Done
echo.
echo Press any key to exit.
pause >nul
goto :eof

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