Program Listing for File base-pke.h

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//==================================================================================
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// Copyright (c) 2014-2022, NJIT, Duality Technologies Inc. and other contributors
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#ifndef LBCRYPTO_CRYPTO_BASE_PKE_H
#define LBCRYPTO_CRYPTO_BASE_PKE_H

#include "ciphertext-fwd.h"
#include "cryptocontext-fwd.h"
#include "key/privatekey-fwd.h"
#include "key/publickey-fwd.h"
#include "decrypt-result.h"

#include <vector>
#include <memory>

namespace lbcrypto {
template <class Element>
class KeyPair;

template <class Element>
class PKEBase {
    using ParmType = typename Element::Params;
    using IntType  = typename Element::Integer;
    using DugType  = typename Element::DugType;
    using DggType  = typename Element::DggType;
    using TugType  = typename Element::TugType;

public:
    virtual ~PKEBase() {}

    virtual KeyPair<Element> KeyGenInternal(CryptoContext<Element> cc, bool makeSparse);

    //  virtual KeyPair<Element> KeyGen(CryptoContext<Element> cc,
    //                                    bool makeSparse,
    //                                    PublicKey<Element>
    // publicKey);

    virtual Ciphertext<Element> Encrypt(Element plaintext, const PrivateKey<Element> privateKey) const;

    virtual Ciphertext<Element> Encrypt(Element plaintext, const PublicKey<Element> publicKey) const;

    virtual DecryptResult Decrypt(ConstCiphertext<Element> ciphertext, const PrivateKey<Element> privateKey,
                                  NativePoly* plaintext) const {
        OPENFHE_THROW("Decryption to NativePoly is not supported");
    }

    virtual DecryptResult Decrypt(ConstCiphertext<Element> ciphertext, const PrivateKey<Element> privateKey,
                                  Poly* plaintext) const {
        OPENFHE_THROW("Decryption to Poly is not supported");
    }

    // CORE OPERATIONS

    virtual std::shared_ptr<std::vector<Element> > EncryptZeroCore(const PrivateKey<Element> privateKey,
                                                                   const std::shared_ptr<ParmType> params) const;

    virtual std::shared_ptr<std::vector<Element> > EncryptZeroCore(const PublicKey<Element> publicKey,
                                                                   const std::shared_ptr<ParmType> params) const;

    virtual Element DecryptCore(const std::vector<Element>& cv, const PrivateKey<Element> privateKey) const;
};

}  // namespace lbcrypto

#endif