mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// registry utilities for Windows
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#ifndef OPENVPN_WIN_REG_H
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#define OPENVPN_WIN_REG_H
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#include <windows.h>
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#include <openvpn/win/winerr.hpp>
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#include <openvpn/common/size.hpp>
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namespace openvpn {
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namespace Win {
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template<typename E>
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static void check_reg_error(DWORD status, const std::string& key)
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{
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if (status != ERROR_SUCCESS)
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{
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const Win::Error err(status);
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OPENVPN_THROW(E, "registry key " << key << " error: " << err.message());
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}
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}
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// HKEY wrapper
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class RegKey
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{
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RegKey(const RegKey&) = delete;
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RegKey& operator=(const RegKey&) = delete;
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public:
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RegKey() : key(nullptr) {}
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bool defined() const { return key != nullptr; }
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HKEY* ref() { return &key; }
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HKEY operator()() { return key; }
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~RegKey()
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{
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if (defined())
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::RegCloseKey(key);
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}
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private:
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HKEY key;
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};
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class RegKeyEnumerator : public std::vector<std::string>
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{
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public:
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RegKeyEnumerator(HKEY hkey, const std::string& path)
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{
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RegKey regKey;
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auto status = ::RegOpenKeyExA(hkey,
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path.c_str(),
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0,
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KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS,
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regKey.ref());
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if (status != ERROR_SUCCESS)
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return;
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DWORD subkeys_num;
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status = ::RegQueryInfoKeyA(regKey(),
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nullptr,
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nullptr,
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NULL,
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&subkeys_num,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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nullptr);
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if (status != ERROR_SUCCESS)
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return;
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const int MAX_KEY_LENGTH = 255;
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for (auto i = 0; i < subkeys_num; ++ i)
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{
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DWORD subkey_size = MAX_KEY_LENGTH;
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char subkey[MAX_KEY_LENGTH];
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status = ::RegEnumKeyExA(regKey(),
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i,
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subkey,
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&subkey_size,
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nullptr,
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nullptr,
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nullptr,
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nullptr);
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if (status == ERROR_SUCCESS)
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push_back(subkey);
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}
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}
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};
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}
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}
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#endif
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