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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- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
#pragma once
#include <windows.h>
#include <openvpn/buffer/bufhex.hpp>
#include <openvpn/win/winerr.hpp>
namespace openvpn::Win::HandleComm {
OPENVPN_EXCEPTION(handle_comm);
// Duplicate a local handle into the address space of a
// remote process and return as a hex string that can be
// communicated across a process boundary.
inline std::string send_handle(const HANDLE handle,
const HANDLE remote_process)
{
HANDLE remote_handle;
if (!::DuplicateHandle(GetCurrentProcess(),
handle,
remote_process,
&remote_handle,
0,
FALSE,
DUPLICATE_SAME_ACCESS))
{
const Win::LastError err;
OPENVPN_THROW(handle_comm, "send_handle: DuplicateHandle failed: " << err.message());
}
return BufHex::render(remote_handle);
}
// Duplicate a remote handle (specified as a hex string) into
// the address space of the local process.
inline HANDLE receive_handle(const std::string &remote_handle_hex,
const HANDLE remote_process)
{
const HANDLE remote_handle = BufHex::parse<HANDLE>(remote_handle_hex, "receive_handle");
HANDLE local_handle;
if (!::DuplicateHandle(remote_process,
remote_handle,
GetCurrentProcess(),
&local_handle,
0,
FALSE,
DUPLICATE_SAME_ACCESS))
{
const Win::LastError err;
OPENVPN_THROW(handle_comm, "receive_handle: DuplicateHandle failed: " << err.message());
}
return local_handle;
}
} // namespace openvpn::Win::HandleComm
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