91 lines
3.1 KiB
Java
91 lines
3.1 KiB
Java
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package profiling;
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import com.google.protobuf.ByteString;
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import com.google.protobuf.InvalidProtocolBufferException;
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import meerkat.crypto.concrete.ECElGamalEncryption;
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import meerkat.crypto.mixnet.Mix2ZeroKnowledgeProver;
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import meerkat.crypto.mixnet.Mix2ZeroKnowledgeVerifier;
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import meerkat.protobuf.ConcreteCrypto;
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import meerkat.protobuf.Crypto;
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import meerkat.protobuf.Voting;
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import mixer.Utiles;
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import org.bouncycastle.math.ec.ECPoint;
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import org.junit.Before;
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import org.junit.Test;
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import prover.Prover;
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import qilin.primitives.RandomOracle;
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import qilin.primitives.concrete.DigestOracle;
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import qilin.primitives.concrete.ECElGamal;
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import qilin.primitives.concrete.ECGroup;
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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 1/20/2016.
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*/
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public class ZeroKnowledgeProof {
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Random rand;
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ECElGamal.SK key;
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ECGroup group;
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ECElGamalEncryption enc;
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ConcreteCrypto.ElGamalPublicKey serializedPk;
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Mix2ZeroKnowledgeProver prover ;
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int n;
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Crypto.EncryptionRandomness[] randomnesses;
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Crypto.RerandomizableEncryptedMessage[] encryptedMessage;
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Crypto.RerandomizableEncryptedMessage[] reencryptedMessage;
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@Before
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public void setup() throws Exception {
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rand = new Random();
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group = new ECGroup("secp256k1");
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BigInteger sk = ECElGamal.generateSecretKey(group, rand);
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key = new ECElGamal.SK(group, sk);
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serializedPk = Utiles.serializePk(group, key);
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enc = new ECElGamalEncryption();
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enc.init(serializedPk);
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RandomOracle randomOracle = new DigestOracle();
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prover = new Prover(new Random(),enc,randomOracle);
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int LogVotes = 12;
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int layers = 2*LogVotes - 1;
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n = layers * (1<<LogVotes) / 2;
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randomnesses = new Crypto.EncryptionRandomness[n*2];
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encryptedMessage = new Crypto.RerandomizableEncryptedMessage[n*2];
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reencryptedMessage = new Crypto.RerandomizableEncryptedMessage[n*2];
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Voting.PlaintextBallot msg;
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for (int i = 0; i < n*2 ; i ++){
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msg = Utiles.genRandomBallot(2,3,16);
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randomnesses[i] = enc.generateRandomness(rand);
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encryptedMessage[i] = enc.encrypt(msg, enc.generateRandomness(rand));
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reencryptedMessage[i] = enc.rerandomize(encryptedMessage[i], randomnesses[i]);
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}
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}
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private ECPoint convert2ECPoint(ByteString bs){
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return group.decode(bs.toByteArray());
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}
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@Test
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public void zeroKnowledgeProofTest() throws InvalidProtocolBufferException {
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System.out.println("Prove");
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System.out.println("n is : " + n);
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System.out.println("start n proves");
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long startTime = System.currentTimeMillis();
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for (int i = 0; i < n*2 ; i +=2){
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prover.prove(encryptedMessage[i],encryptedMessage[i+1],reencryptedMessage[i],reencryptedMessage[i+1],
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false,0,0,0,randomnesses[i],randomnesses[i+1]);
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}
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long finishTime = System.currentTimeMillis();
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System.out.println(" that took: "+(finishTime-startTime)+ " ms");
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System.out.println(" avg of"+((double)(finishTime-startTime))/n + " ms");
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}
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}
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