public void BDVerifierSerializationTest()
{
VerifierBitDecompositionParameters verifier = new VerifierBitDecompositionParameters(
_parameters[0].G, _parameters[0].Generators, _parameters[0]);
string jsonString = CryptoSerializer.Serialize <VerifierBitDecompositionParameters>(verifier);
VerifierBitDecompositionParameters deserializedVerifier = CryptoSerializer.Deserialize <VerifierBitDecompositionParameters>(jsonString);
Assert.AreEqual(verifier.Group.GroupName, deserializedVerifier.Group.GroupName);
StaticHelperClass.AssertArraysAreEqual(verifier.PublicValues, deserializedVerifier.PublicValues, "PublicValues");
StaticHelperClass.AssertArraysAreEqual <DLRepOfGroupElement>(verifier.Witnesses, deserializedVerifier.Witnesses, "Witnesses");
}
public void BDEndToEnd()
{
FieldZqElement bigNum = _parameters[0].FieldZq.GetElement(2056);
PedersenCommitment bigNumCommit = new PedersenCommitment(bigNum, _parameters[0]);
int decompositionLength = 15;
ProverBitDecompositionParameters proverParams = new ProverBitDecompositionParameters(
bigNumCommit,
decompositionLength,
_parameters[0]);
BitDecompositionProof proof = new BitDecompositionProof(proverParams);
Assert.IsTrue(proof.Verify(proverParams), "could not verify proof with prover params");
VerifierBitDecompositionParameters verifierParams = new VerifierBitDecompositionParameters(
proverParams.ClosedCommitment,
proverParams.ClosedBitDecomposition(),
proverParams);
Assert.IsTrue(proof.Verify(verifierParams), "could not verify proof with verifier parameters");
}
public void BDDecompositionTest()
{
FieldZqElement zero;
FieldZqElement one;
FieldZqElement two;
FieldZqElement five;
FieldZqElement ten;
BitArray dec;
FieldZqElement recompose;
for (int paramIndex = 0; paramIndex < _parameters.Length; ++paramIndex)
{
FieldZq field = _parameters[paramIndex].FieldZq;
zero = field.Zero;
one = field.One;
two = field.GetElement(2);
five = field.GetElement(5);
ten = field.GetElement(10);
dec = VerifierBitDecompositionParameters.GetBitDecomposition(one, 10, field);
recompose = VerifierBitDecompositionParameters.GetBitComposition(dec, field);
Assert.AreEqual(one, recompose);
Assert.AreEqual(true, dec.Get(0), "first bit should be one");
Assert.AreEqual(false, dec.Get(1), "second bit should be zero");
Assert.AreEqual(10, dec.Length, "decomposition length should be 10");
dec = VerifierBitDecompositionParameters.GetBitDecomposition(two, 20, field);
recompose = VerifierBitDecompositionParameters.GetBitComposition(dec, field);
Assert.AreEqual(20, dec.Length, "decomposition length should be 10");
Assert.AreEqual(two, recompose);
Assert.AreEqual(false, dec[0], "first bit is 0");
Assert.AreEqual(true, dec[1], "second bit is 1");
Assert.AreEqual(false, dec[2], "third bit is 0");
Assert.AreEqual(false, dec[19], "last bit is 0");
dec = VerifierBitDecompositionParameters.GetBitDecomposition(five, 30, field);
recompose = VerifierBitDecompositionParameters.GetBitComposition(dec, field);
Assert.AreEqual(30, dec.Length, "decomposition length should be 30");
Assert.AreEqual(five, recompose);
Assert.AreEqual(true, dec[0], "first bit is 1");
Assert.AreEqual(false, dec[1], "second bit is 0");
Assert.AreEqual(true, dec[2], "third bit is 1");
Assert.AreEqual(false, dec[3], "fourth bit is 0");
Assert.AreEqual(false, dec[4], "fifth bit is 0");
Assert.AreEqual(false, dec[29], "last bit is 0");
dec = VerifierBitDecompositionParameters.GetBitDecomposition(ten, 30, field);
recompose = VerifierBitDecompositionParameters.GetBitComposition(dec, field);
Assert.AreEqual(30, dec.Length, "decomposition length should be 30");
Assert.AreEqual(ten, recompose);
Assert.AreEqual(false, dec[0], "first bit is 0");
Assert.AreEqual(true, dec[1], "second bit is 1");
Assert.AreEqual(false, dec[2], "third bit is 0");
Assert.AreEqual(true, dec[3], "fourth bit is 1");
Assert.AreEqual(false, dec[4], "fifth bit is 0");
Assert.AreEqual(false, dec[29], "last bit is 0");
FieldZqElement random = field.GetRandomElement(true);
dec = VerifierBitDecompositionParameters.GetBitDecomposition(random, 0, field);
recompose = VerifierBitDecompositionParameters.GetBitComposition(dec, field);
Assert.AreEqual(random, recompose, "recomposition failed");
}
}