mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
|
|
// over a single port, with support for SSL/TLS-based
|
|
// session authentication and key exchange,
|
|
// packet encryption, packet authentication, and
|
|
// packet compression.
|
|
//
|
|
// Copyright (C) 2012-2024 OpenVPN Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License Version 3
|
|
// as published by the Free Software Foundation.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program in the COPYING file.
|
|
// If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#pragma once
|
|
|
|
#ifdef _WIN32
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
#include <memory>
|
|
|
|
namespace openvpn::wstring {
|
|
|
|
/**
|
|
* @brief Convert a UTF-8 string to UTF-16
|
|
*
|
|
* @param str The UTF-8 string to be converted
|
|
* @return std::wstring The converted UTF-16 string
|
|
*/
|
|
inline std::wstring from_utf8(const std::string &str)
|
|
{
|
|
std::wstring wStr; // enable RVO
|
|
if (str.empty())
|
|
return wStr;
|
|
const int str_size = static_cast<int>(str.size());
|
|
const auto reqSize = ::MultiByteToWideChar(CP_UTF8, 0, str.data(), str_size, nullptr, 0);
|
|
if (reqSize == 0)
|
|
throw std::runtime_error("MultiByteToWideChar(1) failed with code: [" + std::to_string(::GetLastError()) + "]");
|
|
wStr.resize(reqSize, L'\0'); // Allocate space
|
|
if (::MultiByteToWideChar(CP_UTF8, 0, str.data(), str_size, wStr.data(), reqSize) == 0)
|
|
throw std::runtime_error("MultiByteToWideChar(2) failed with code: [" + std::to_string(::GetLastError()) + "]");
|
|
return wStr;
|
|
}
|
|
|
|
/**
|
|
* @brief Convert a UTF-16 string to UTF-8
|
|
*
|
|
* @param wstr The UTF-16 string to be converted
|
|
* @return std::string The converted UTF-8 string
|
|
*/
|
|
inline std::string to_utf8(const std::wstring &wstr)
|
|
{
|
|
std::string str; // For RVO
|
|
if (wstr.empty())
|
|
return str;
|
|
const int wstr_size = static_cast<int>(wstr.size());
|
|
const auto reqSize = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, nullptr, 0, nullptr, nullptr);
|
|
if (reqSize == 0)
|
|
throw std::runtime_error("WideCharToMultiByte(1) failed with code: [" + std::to_string(::GetLastError()) + "]");
|
|
str.resize(reqSize, '\0'); // Allocate space
|
|
if (::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, str.data(), reqSize, nullptr, nullptr) == 0)
|
|
throw std::runtime_error("WideCharToMultiByte(2) failed with code: [" + std::to_string(::GetLastError()) + "]");
|
|
return str;
|
|
}
|
|
|
|
/**
|
|
* @brief Split a wide character string into a C array of it's letters
|
|
*
|
|
* @param wstr The wide string to be split
|
|
* @return std::unique_ptr<wchar_t[]> Smart pointer to the generated array
|
|
*/
|
|
inline std::unique_ptr<wchar_t[]> to_wchar_t(const std::wstring &wstr)
|
|
{
|
|
const size_t len = wstr.length();
|
|
std::unique_ptr<wchar_t[]> ret(new wchar_t[len + 1]);
|
|
size_t i;
|
|
for (i = 0; i < len; ++i)
|
|
ret[i] = wstr[i];
|
|
ret[i] = L'\0';
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Convert a UTF-8 string vector to a UTF-16 MULTI_SZ string
|
|
*
|
|
* MULTI_SZ is a format used in the Windows Registry. It's a buffer
|
|
* containing multiple NUL terminated strings concatenated with each
|
|
* other, with an extra NUL at the end to signal termination of the
|
|
* MULTI_SZ string itself.
|
|
*
|
|
* @param strvec The vector of strings to convert
|
|
* @return std::wstring The converted MULTI_SZ string
|
|
*/
|
|
inline std::wstring pack_string_vector(const std::vector<std::string> &strvec)
|
|
{
|
|
if (strvec.empty())
|
|
{
|
|
return std::wstring(2, L'\0'); // empty MULTI_SZ
|
|
}
|
|
std::wstring ret;
|
|
for (auto &s : strvec)
|
|
{
|
|
ret += from_utf8(s);
|
|
ret += L'\0';
|
|
}
|
|
ret += L'\0';
|
|
return ret;
|
|
}
|
|
|
|
#endif // #ifdef _WIN32
|
|
}
|