Program Listing for File rns-leveledshe.h

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#ifndef LBCRYPTO_CRYPTO_RNS_LEVELEDSHE_H
#define LBCRYPTO_CRYPTO_RNS_LEVELEDSHE_H

#include "lattice/lat-hal.h"

#include "schemebase/base-leveledshe.h"

#include <string>

namespace lbcrypto {

class LeveledSHERNS : public LeveledSHEBase<DCRTPoly> {
public:
    virtual ~LeveledSHERNS() {}

    // SHE NEGATION

    // SHE ADDITION

    using LeveledSHEBase<DCRTPoly>::EvalAdd;
    using LeveledSHEBase<DCRTPoly>::EvalAddInPlace;
    using LeveledSHEBase<DCRTPoly>::EvalAddMutable;
    using LeveledSHEBase<DCRTPoly>::EvalAddMutableInPlace;

    Ciphertext<DCRTPoly> EvalAdd(ConstCiphertext<DCRTPoly> ciphertext1,
                                 ConstCiphertext<DCRTPoly> ciphertext2) const override;

    void EvalAddInPlace(Ciphertext<DCRTPoly>& ciphertext1, ConstCiphertext<DCRTPoly> ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalAddMutable(Ciphertext<DCRTPoly>& ciphertext1,
                                        Ciphertext<DCRTPoly>& ciphertext2) const override;

    void EvalAddMutableInPlace(Ciphertext<DCRTPoly>& ciphertext1, Ciphertext<DCRTPoly>& ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalAdd(ConstCiphertext<DCRTPoly> ciphertext, ConstPlaintext plaintext) const override;

    void EvalAddInPlace(Ciphertext<DCRTPoly>& ciphertext, ConstPlaintext plaintext) const override;

    Ciphertext<DCRTPoly> EvalAddMutable(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    void EvalAddMutableInPlace(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    // SHE SUBTRACTION

    using LeveledSHEBase<DCRTPoly>::EvalSub;
    using LeveledSHEBase<DCRTPoly>::EvalSubInPlace;
    using LeveledSHEBase<DCRTPoly>::EvalSubMutable;
    using LeveledSHEBase<DCRTPoly>::EvalSubMutableInPlace;

    Ciphertext<DCRTPoly> EvalSub(ConstCiphertext<DCRTPoly> ciphertext1,
                                 ConstCiphertext<DCRTPoly> ciphertext2) const override;

    void EvalSubInPlace(Ciphertext<DCRTPoly>& ciphertext1, ConstCiphertext<DCRTPoly> ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalSubMutable(Ciphertext<DCRTPoly>& ciphertext1,
                                        Ciphertext<DCRTPoly>& ciphertext2) const override;

    void EvalSubMutableInPlace(Ciphertext<DCRTPoly>& ciphertext1, Ciphertext<DCRTPoly>& ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalSub(ConstCiphertext<DCRTPoly> ciphertext, ConstPlaintext plaintext) const override;

    void EvalSubInPlace(Ciphertext<DCRTPoly>& ciphertext, ConstPlaintext plaintext) const override;

    Ciphertext<DCRTPoly> EvalSubMutable(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    void EvalSubMutableInPlace(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    // SHE MULTIPLICATION

    using LeveledSHEBase<DCRTPoly>::EvalMult;
    using LeveledSHEBase<DCRTPoly>::EvalMultInPlace;
    using LeveledSHEBase<DCRTPoly>::EvalMultMutable;
    using LeveledSHEBase<DCRTPoly>::EvalMultMutableInPlace;

    Ciphertext<DCRTPoly> EvalMult(ConstCiphertext<DCRTPoly> ciphertext1,
                                  ConstCiphertext<DCRTPoly> ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalMultMutable(Ciphertext<DCRTPoly>& ciphertext1,
                                         Ciphertext<DCRTPoly>& ciphertext2) const override;

    Ciphertext<DCRTPoly> EvalSquare(ConstCiphertext<DCRTPoly> ciphertext) const override;

    Ciphertext<DCRTPoly> EvalSquareMutable(Ciphertext<DCRTPoly>& ciphertext) const override;

    Ciphertext<DCRTPoly> EvalMult(ConstCiphertext<DCRTPoly> ciphertext, ConstPlaintext plaintext) const override;

    void EvalMultInPlace(Ciphertext<DCRTPoly>& ciphertext, ConstPlaintext plaintext) const override;

    Ciphertext<DCRTPoly> EvalMultMutable(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    void EvalMultMutableInPlace(Ciphertext<DCRTPoly>& ciphertext, Plaintext plaintext) const override;

    Ciphertext<DCRTPoly> MultByMonomial(ConstCiphertext<DCRTPoly> ciphertext, usint power) const override;

    void MultByMonomialInPlace(Ciphertext<DCRTPoly>& ciphertext, usint power) const override;

    // SHE AUTOMORPHISM

    // SHE LEVELED Mod Reduce

    Ciphertext<DCRTPoly> ModReduce(ConstCiphertext<DCRTPoly> ciphertext, size_t levels) const override;

    void ModReduceInPlace(Ciphertext<DCRTPoly>& ciphertext, size_t levels) const override;

    // SHE LEVELED Level Reduce

    Ciphertext<DCRTPoly> LevelReduce(ConstCiphertext<DCRTPoly> ciphertext, const EvalKey<DCRTPoly> evalKey,
                                     size_t levels) const override;

    void LevelReduceInPlace(Ciphertext<DCRTPoly>& ciphertext, const EvalKey<DCRTPoly> evalKey,
                            size_t levels) const override;

    // SHE LEVELED Compress

    Ciphertext<DCRTPoly> Compress(ConstCiphertext<DCRTPoly> ciphertext, size_t towersLeft) const override;

protected:
    // RNS Core

    Ciphertext<DCRTPoly> ModReduceInternal(ConstCiphertext<DCRTPoly> ciphertext, size_t levels) const override;

    void ModReduceInternalInPlace(Ciphertext<DCRTPoly>& ciphertext, size_t levels) const override {
        OPENFHE_THROW("ModReduceInternalInPlace is not supported for this scheme");
    }

    Ciphertext<DCRTPoly> LevelReduceInternal(ConstCiphertext<DCRTPoly> ciphertext, size_t levels) const override;

    void LevelReduceInternalInPlace(Ciphertext<DCRTPoly>& ciphertext, size_t levels) const override {
        OPENFHE_THROW("LevelReduceInternalInPlace is not supported for this scheme");
    }

    void AdjustLevelsInPlace(Ciphertext<DCRTPoly>& ciphertext1, Ciphertext<DCRTPoly>& ciphertext2) const override;

    void AdjustForAddOrSubInPlace(Ciphertext<DCRTPoly>& ciphertext1, Ciphertext<DCRTPoly>& ciphertext2) const override;

    void AdjustForMultInPlace(Ciphertext<DCRTPoly>& ciphertext1, Ciphertext<DCRTPoly>& ciphertext2) const override;

    // SERIALIZATION

    template <class Archive>
    void save(Archive& ar) const {
        ar(cereal::base_class<LeveledSHEBase<DCRTPoly>>(this));
    }

    template <class Archive>
    void load(Archive& ar) {
        ar(cereal::base_class<LeveledSHEBase<DCRTPoly>>(this));
    }

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

}  // namespace lbcrypto

#endif