gss_tsig_context.h

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// Copyright (C) 2021-2026 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 GSS_TSIG_CONTEXT_H
#define GSS_TSIG_CONTEXT_H
 
#include <dns/tsig.h>
#include <gss_tsig/gss_tsig_key.h>
 
#include <boost/shared_ptr.hpp>
 
namespace isc {
namespace gss_tsig {

class GssTsigContext : public dns::TSIGContext {
public:
    explicit GssTsigContext(GssTsigKey& key);

    virtual ~GssTsigContext();

    virtual dns::ConstTSIGRecordPtr
    sign(const uint16_t qid, const void* const data,
         const size_t data_len) override;

    virtual dns::TSIGError
    verify(const dns::TSIGRecord* const record, const void* const data,
           const size_t data_len) override;

    virtual bool lastHadSignature() const override;

    virtual size_t getTSIGLength() const override;

    virtual State getState() const override {
        return (state_);
    }

    virtual void setState(State state) {
        state_ = state;
    }

    virtual dns::TSIGError getError() const override {
        return (error_);
    }

    virtual void setError(dns::TSIGError error) {
        error_ = error;
    }
 
private:
    State state_;

    GssTsigKey& key_;

    std::vector<uint8_t> previous_digest_;

    dns::TSIGError error_;

    uint64_t previous_timesigned_;

    int last_sig_dist_;

    util::OutputBuffer tbs_;
 
protected:
    void update(const void* const data, size_t len);
};

typedef boost::shared_ptr<GssTsigContext> GssTsigContextPtr;
 
} // end of namespace isc::gss_tsig
} // end of namespace isc
 
#endif // GSS_TSIG_CONTEXT_H