Program Listing for File evalkey.h

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//==================================================================================
// BSD 2-Clause License
//
// Copyright (c) 2014-2022, NJIT, Duality Technologies Inc. and other contributors
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// Author TPOC: contact@openfhe.org
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#ifndef LBCRYPTO_CRYPTO_KEY_EVALKEY_H
#define LBCRYPTO_CRYPTO_KEY_EVALKEY_H

#include "key/evalkey-fwd.h"
#include "key/key.h"

#include <memory>
#include <vector>
#include <string>

namespace lbcrypto {

template <class Element>
class EvalKeyImpl : public Key<Element> {
    constexpr static std::string_view NOT_SUPPORTED_ERROR = "This function is not supported";

public:
    EvalKeyImpl() = default;

    explicit EvalKeyImpl(const CryptoContext<Element>& cc) : Key<Element>(cc) {}

    virtual ~EvalKeyImpl() = default;

    virtual void SetAVector(const std::vector<Element>& a) {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual void SetAVector(std::vector<Element>&& a) {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual const std::vector<Element>& GetAVector() const {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual void SetBVector(const std::vector<Element>& b) {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual void SetBVector(std::vector<Element>&& b) {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual const std::vector<Element>& GetBVector() const {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    virtual void ClearKeys() {
        OPENFHE_THROW(NOT_SUPPORTED_ERROR);
    }

    friend bool operator==(const EvalKeyImpl& a, const EvalKeyImpl& b) {
        return a.key_compare(b);
    }

    friend bool operator!=(const EvalKeyImpl& a, EvalKeyImpl& b) {
        return !(a == b);
    }

    virtual bool key_compare(const EvalKeyImpl& other) const {
        return false;
    }

    template <class Archive>
    void save(Archive& ar, std::uint32_t const version) const {
        ar(::cereal::base_class<Key<Element>>(this));
    }

    template <class Archive>
    void load(Archive& ar, std::uint32_t const version) {
        ar(::cereal::base_class<Key<Element>>(this));
    }

    std::string SerializedObjectName() const override {
        return "EvalKey";
    }
};

}  // namespace lbcrypto

#endif