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// 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) 2012-2022 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
#include <string>
#include <vector>
#include <atomic>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/file.hpp>
#include <openvpn/common/string.hpp>
#include <openvpn/common/base64.hpp>
#include <openvpn/common/splitlines.hpp>
#include <openvpn/common/strneq.hpp>
#include <openvpn/common/unicode.hpp>
#include <openvpn/common/userpass.hpp>
#include <openvpn/common/platform.hpp>
#include <openvpn/common/writeprivate.hpp>
#include <openvpn/http/header.hpp>
namespace openvpn {
namespace WS {
struct Creds
{
OPENVPN_EXCEPTION(web_creds_error);
static Creds load_from_header(const HTTP::HeaderList &headlist,
const bool password_required,
const bool throw_on_error)
{
Creds ret;
try
{
// Authorization: Basic Zm9vOmJhcg==
for (auto &h : headlist)
{
if (string::strcasecmp(h.name, "authorization") == 0
&& h.value.length() >= 7
&& string::strcasecmp(h.value.substr(0, 6), "basic ") == 0)
{
const std::string creds = base64->decode(h.value.substr(6));
const auto cv = string::split(creds, ':', 1);
if (cv.size() != 2)
throw Exception("error splitting credentials");
if (!Unicode::is_valid_utf8(cv[0]))
throw Exception("username not UTF-8");
if (!Unicode::is_valid_utf8(cv[1]))
throw Exception("password not UTF-8");
if (cv[0].empty())
throw Exception("username empty");
if (password_required && cv[1].empty())
throw Exception("password empty");
ret.username = cv[0];
ret.password = cv[1];
break;
}
}
}
catch (const std::exception &e)
{
if (throw_on_error)
throw web_creds_error(e.what());
}
return ret;
}
static Creds load_from_file(const std::string &fn,
const bool password_required,
const bool throw_on_error)
{
Creds ret;
try
{
const std::string content = read_text_utf8(fn);
SplitLines sl(content, 1024);
std::string u, p;
if (sl.next(u) != SplitLines::S_OKAY)
throw Exception(fn + " : username missing");
if (sl.next(p) != SplitLines::S_OKAY)
throw Exception(fn + " : password missing");
if (u.empty())
throw Exception(fn + " : username empty");
if (password_required && p.empty())
throw Exception(fn + " : password empty");
ret.username = std::move(u);
ret.password = std::move(p);
}
catch (const std::exception &e)
{
if (throw_on_error)
throw web_creds_error(e.what());
}
return ret;
}
static Creds load_from_options(const OptionList &opt,
const std::string &opt_name,
const unsigned int flags)
{
Creds ret;
UserPass::parse(opt, opt_name, flags, ret.username, ret.password);
return ret;
}
bool defined() const
{
return !username.empty();
}
bool defined_full() const
{
return !username.empty() && !password.empty();
}
void save_to_file(const std::string &fn) const
{
write_private(fn, username + '\n' + password + '\n');
}
bool operator==(const Creds &rhs) const
{
return !operator!=(rhs);
}
bool operator!=(const Creds &rhs) const
{
bool neq = crypto::str_neq(username, rhs.username);
atomic_thread_fence(std::memory_order_acq_rel);
neq |= crypto::str_neq(password, rhs.password);
atomic_thread_fence(std::memory_order_acq_rel);
return neq;
}
bool password_eq(const Creds &rhs) const
{
bool neq = crypto::str_neq(password, rhs.password);
atomic_thread_fence(std::memory_order_acq_rel);
return !neq;
}
std::string to_string() const
{
return username + '/' + password;
}
std::string username;
std::string password;
};
} // namespace WS
} // namespace openvpn
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