tkey_exchange.h

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// Copyright (C) 2021-2025 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#ifndef TKEY_EXCHANGE_H
#define TKEY_EXCHANGE_H
 
#include <asiodns/io_fetch.h>
#include <asiolink/io_service.h>
#include <gss_tsig_cfg.h>
#include <gss_tsig_key.h>
#include <util/buffer.h>
#include <memory>
 
namespace isc {
namespace gss_tsig {
 
class TKeyExchange;
typedef boost::shared_ptr<TKeyExchange> TKeyExchangePtr;

class TKeyExchangeImpl;

class TKeyExchange : boost::noncopyable {
public:
    enum Status {
        SUCCESS,           
        TIMEOUT,           
        IO_STOPPED,        
        INVALID_RESPONSE,  
        UNSIGNED_RESPONSE, 
        BAD_CREDENTIALS,   
        OTHER              
    };

    static std::string statusToText(Status status);

    class Callback {
    public:
        virtual ~Callback() { }

        virtual void operator()(TKeyExchange::Status status) = 0;
    };

    TKeyExchange(const isc::asiolink::IOServicePtr& io_service,
                 const DnsServerPtr& server, const GssTsigKeyPtr& key,
                 Callback* callback, uint32_t timeout = TKEY_EXCHANGE_IO_TIMEOUT,
                 OM_uint32 flags = TKEY_EXCHANGE_FLAGS);

    virtual ~TKeyExchange();

    void doExchange();

    void cancel();

    isc::asiolink::IOServicePtr getIOService();

    void setIOService(const isc::asiolink::IOServicePtr io_service);

    static const OM_uint32 TKEY_EXCHANGE_FLAGS;

    static const uint32_t TKEY_EXCHANGE_IO_TIMEOUT;
 
private:
    std::unique_ptr<TKeyExchangeImpl> impl_;
};
 
} // namespace isc
} // namespace gss_tsig
 
#endif // TKEY_EXCHANGE_H