// SoftEther VPN Source Code - Stable Edition Repository
// Cedar Communication Module
// 
// SoftEther VPN Server, Client and Bridge are free software under the Apache License, Version 2.0.
// 
// Copyright (c) Daiyuu Nobori.
// Copyright (c) SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) SoftEther Corporation.
// Copyright (c) all contributors on SoftEther VPN project in GitHub.
// 
// All Rights Reserved.
// 
// http://www.softether.org/
// 
// This stable branch is officially managed by Daiyuu Nobori, the owner of SoftEther VPN Project.
// Pull requests should be sent to the Developer Edition Master Repository on https://github.com/SoftEtherVPN/SoftEtherVPN
// 
// License: The Apache License, Version 2.0
// https://www.apache.org/licenses/LICENSE-2.0
// 
// DISCLAIMER
// ==========
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// 
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN, UNDER
// JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY, MERGE, PUBLISH,
// DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS SOFTWARE, THAT ANY
// JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS SOFTWARE OR ITS CONTENTS,
// AGAINST US (SOFTETHER PROJECT, SOFTETHER CORPORATION, DAIYUU NOBORI OR OTHER
// SUPPLIERS), OR ANY JURIDICAL DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND
// OF USING, COPYING, MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING,
// AND/OR SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO EXCLUSIVE
// JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO, JAPAN. YOU MUST WAIVE
// ALL DEFENSES OF LACK OF PERSONAL JURISDICTION AND FORUM NON CONVENIENS.
// PROCESS MAY BE SERVED ON EITHER PARTY IN THE MANNER AUTHORIZED BY APPLICABLE
// LAW OR COURT RULE.
// 
// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS YOU HAVE
// A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY CRIMINAL LAWS OR CIVIL
// RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS SOFTWARE IN OTHER COUNTRIES IS
// COMPLETELY AT YOUR OWN RISK. THE SOFTETHER VPN PROJECT HAS DEVELOPED AND
// DISTRIBUTED THIS SOFTWARE TO COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING
// CIVIL RIGHTS INCLUDING PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER
// COUNTRIES' LAWS OR CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES.
// WE HAVE NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+ COUNTRIES
// AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE WORLD, WITH
// DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY COUNTRIES' LAWS, REGULATIONS
// AND CIVIL RIGHTS TO MAKE THE SOFTWARE COMPLY WITH ALL COUNTRIES' LAWS BY THE
// PROJECT. EVEN IF YOU WILL BE SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A
// PUBLIC SERVANT IN YOUR COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE
// LIABLE TO RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT JUST A
// STATEMENT FOR WARNING AND DISCLAIMER.
// 
// READ AND UNDERSTAND THE 'WARNING.TXT' FILE BEFORE USING THIS SOFTWARE.
// SOME SOFTWARE PROGRAMS FROM THIRD PARTIES ARE INCLUDED ON THIS SOFTWARE WITH
// LICENSE CONDITIONS WHICH ARE DESCRIBED ON THE 'THIRD_PARTY.TXT' FILE.
// 
// 
// SOURCE CODE CONTRIBUTION
// ------------------------
// 
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
// 
// 
// DEAR SECURITY EXPERTS
// ---------------------
// 
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
// 
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
// 
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
// 
// Thank you for your cooperation.
// 
// 
// NO MEMORY OR RESOURCE LEAKS
// ---------------------------
// 
// The memory-leaks and resource-leaks verification under the stress
// test has been passed before release this source code.


// vpncmdsys.c
// vpncmd bootstrup

#include <GlobalConst.h>

#include <winsock2.h>
#include <windows.h>
#include <wincrypt.h>
#include <wininet.h>
#include <shlobj.h>
#include <commctrl.h>
#include <Dbghelp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <stdarg.h>
#include <time.h>
#include <locale.h>
#include <Mayaqua/Mayaqua.h>
#include <Cedar/Cedar.h>
#include "vpncmdsys.h"

static UINT ret_code = 0;

// Get whether the system is a Windows NT
bool IsWindowsNt()
{
	OSVERSIONINFO info;

	ZeroMemory(&info, sizeof(info));
	info.dwOSVersionInfoSize = sizeof(info);

	if (GetVersionEx(&info) == false)
	{
		return false;
	}

	if (info.dwPlatformId == VER_PLATFORM_WIN32_NT)
	{
		return true;
	}

	return false;
}

// Execute a child process
bool ExecProcess(char *exe_name, wchar_t *args_w)
{
	bool ret;
	wchar_t exe_name_w[MAX_SIZE];
	char args[MAX_SIZE];
	STARTUPINFO info;
	STARTUPINFOW info_w;
	PROCESS_INFORMATION proc;
	// Validate arguments
	if (exe_name == NULL || args_w == NULL)
	{
		return false;
	}

	ZeroMemory(exe_name_w, sizeof(exe_name_w));
	ZeroMemory(args, sizeof(args));
	mbstowcs(exe_name_w, exe_name, strlen(exe_name));
	wcstombs(args, args_w, sizeof(args));

	ZeroMemory(&info, sizeof(info));
	info.cb = sizeof(info);

	ZeroMemory(&info_w, sizeof(info_w));
	info_w.cb = sizeof(info_w);

	ZeroMemory(&proc, sizeof(proc));

	if (IsWindowsNt() == false)
	{
		ret = CreateProcess(exe_name, args, NULL, NULL, false, NORMAL_PRIORITY_CLASS,
			NULL, NULL, &info, &proc);
	}
	else
	{
		ret = CreateProcessW(exe_name_w, args_w, NULL, NULL, false, NORMAL_PRIORITY_CLASS,
			NULL, NULL, &info_w, &proc);
	}

	if (ret)
	{
		WaitForSingleObject(proc.hProcess, INFINITE);

		GetExitCodeProcess(proc.hProcess, &ret_code);
	}

	return ret;
}

// Entry point
int main(int argc, char *argv[])
{
	HKEY hKey;
	bool ok = false;
	char error[MAX_SIZE];
	wchar_t *current_args;
	bool flag = false;
	bool break_now = false;

	error[0] = 0;

	setlocale(LC_ALL, "");

	current_args = GetCommandLineW();

	// Remove the program name portion from the command line string
	while (true)
	{
		switch (*current_args)
		{
		case L'\"':
			if (flag == false)
			{
				flag = true;
			}
			else
			{
				flag = false;
			}
			break;

		case L' ':
		case L'\t':
		case 0:
			if (flag == false)
			{
				break_now = true;
			}
			break;
		}
		if (break_now)
		{
			break;
		}
		current_args++;
	}

	while (true)
	{
		if (*current_args == L' ' || *current_args == L'\t')
		{
			current_args++;
		}
		else
		{
			break;
		}
	}

	strcpy(error, "VPN Command Line Tools is not Installed.\nPlease reinstall programs.");

	// Get the path of the vpncmd.exe from the registry
	if (RegOpenKey(HKEY_LOCAL_MACHINE, VPNCMD_BOOTSTRAP_REG_KEYNAME, &hKey) == 0)
	{
		DWORD type = REG_SZ;
		DWORD size = 4096;
		char buf[4096];

		if (RegQueryValueEx(hKey, VPNCMD_BOOTSTRAP_REG_VALUENAME_PATH, NULL, &type, (LPBYTE)buf, &size) == 0)
		{
			wchar_t args[MAX_SIZE];

			swprintf(args, sizeof(args), L"\"%S\" %s", buf, current_args);
			if (ExecProcess(buf, args) == false)
			{
				//sprintf(error, "Failed to execute \"%S\".", buf);
			}
			else
			{
				ok = true;
			}
		}

		RegCloseKey(hKey);
	}

	if (ok == false)
	{
		printf("%s\n", error);
	}

	return ret_code;
}