69 lines
2.8 KiB
Java
69 lines
2.8 KiB
Java
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package SecureDistributedKeyGeneration;
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import Communication.Network;
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import FeldmanVerifiableSecretSharing.VerifiableSecretSharing;
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import JointFeldmanProtocol.DistributedKeyGeneration;
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import com.google.protobuf.ByteString;
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import meerkat.protobuf.DKGMessages;
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import org.factcenter.qilin.primitives.concrete.Zpstar;
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import java.math.BigInteger;
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import java.util.Random;
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/**
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* Created by Tzlil on 2/17/2016.
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*/
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public class SecureDistributedKeyGeneration extends DistributedKeyGeneration {
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VerifiableSecretSharing verifiableSecretSharing;
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public SecureDistributedKeyGeneration(int t, int n, BigInteger zi, Random random, BigInteger p, BigInteger q, BigInteger g
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,BigInteger h, Network network) {
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super(t, n, zi, random, p, q, g, network.connect(new SecureDistributedKeyGenerationMessageHandler(t,n,g,new Zpstar(p))));
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this.verifiableSecretSharing = new VerifiableSecretSharing(t,n,new BigInteger(q.bitLength(), random).mod(q),random,p,q,h,user);
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}
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@Override
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protected void computeAndSendSecrets() {
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DKGMessages.SecretMessage[] secretMessages1 = prepareSecretMessages();
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DKGMessages.SecretMessage[] secretMessages2 = verifiableSecretSharing.prepareSecretMessages();
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DKGMessages.DoubleSecretMessage doubleSecretMessage;
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for (int j = 1; j <= n ; j++ ){
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doubleSecretMessage = DKGMessages.DoubleSecretMessage.newBuilder()
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.setS1(secretMessages1[j - 1])
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.setS1(secretMessages2[j - 1])
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.build();
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user.send(j, DKGMessages.Mail.Type.SECRET,doubleSecretMessage);
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}
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}
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@Override
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public DKGMessages.CommitmentMessage[] prepareCommitmentMessages() {
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DKGMessages.CommitmentMessage[] commitmentMessages = new DKGMessages.CommitmentMessage[t + 1];
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BigInteger[] commitments2 = verifiableSecretSharing.getCommitments();
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for (int k = 0; k <= t ; k ++) {
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commitmentMessages[k] = DKGMessages.CommitmentMessage.newBuilder()
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.setK(k)
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.setCommitment(ByteString.copyFrom(zpstar.add(commitments[k],commitments2[k]).toByteArray()))
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.build();
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}
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return commitmentMessages;
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}
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@Override
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protected void answerComplaint(int j) {
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DKGMessages.SecretMessage secretMessage1 = DKGMessages.SecretMessage.newBuilder()
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.setSecret(getShare(j).asMessage())
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.build();
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DKGMessages.SecretMessage secretMessage2 = DKGMessages.SecretMessage.newBuilder()
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.setSecret(verifiableSecretSharing.getShare(j).asMessage())
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.build();
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user.broadcast(DKGMessages.Mail.Type.SECRET, DKGMessages.DoubleSecretMessage.newBuilder()
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.setS1(secretMessage1)
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.setS2(secretMessage2)
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.build());
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}
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}
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