/* Copyright 2020 The FedLearn Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.jdt.fedlearn.core.encryption.javallier;


import com.jdt.fedlearn.core.encryption.common.PrivateKey;
import com.jdt.fedlearn.core.encryption.common.PublicKey;
import com.n1analytics.paillier.PaillierPrivateKey;
import com.n1analytics.paillier.PaillierPublicKey;

import java.math.BigInteger;

public class JavallierPriKey implements PrivateKey{
    private final PaillierPrivateKey privateKey;
    private final boolean isSafe;

    public JavallierPriKey(PaillierPrivateKey privateKey, boolean isSafe) {
        this.privateKey = privateKey;
        this.isSafe = isSafe;
    }

    public JavallierPriKey(BigInteger n, BigInteger lambda, boolean isSafe) {
        PaillierPublicKey publicKey = new PaillierPublicKey(n);
        this.privateKey = new PaillierPrivateKey(publicKey, lambda);
        this.isSafe = isSafe;
    }

    public PaillierPrivateKey getPrivateKey() {
        return privateKey;
    }

    public String serialize() {
        // First step is to serialise the Public key, then
        JSerializer serializer = new JSerializer(isSafe);
        privateKey.serialize(serializer);
        return serializer.getSerialized();
    }


    public PublicKey generatePublicKey() {
        return new JavallierPubKey(privateKey.getPublicKey().getModulus(), isSafe);
    }

}
