public void TestValidateCommitmentValid()
{
var signatureService = new MultiSignature(_sepSecp256K1);
var commitment = signatureService.ComputeCommitment(signatureService.ComputeCommitmentSecret());
var commitmentHash = signatureService.ComputeCommitmentHash(commitment);
Assert.IsTrue(signatureService.ValidateCommitment(commitment, commitmentHash));
}
public void TestComputeCommitmentHash()
{
var signatureService = new MultiSignature(_sepSecp256K1);
var commitment = signatureService.ComputeCommitment(signatureService.ComputeCommitmentSecret());
var commitmentHash = signatureService.ComputeCommitmentHash(commitment);
Assert.AreNotEqual(commitment, commitmentHash);
}
public void TestComputeCommitmentEmptySecret()
{
var signatureService = new MultiSignature(_sepSecp256K1);
var commitmentSecret = new byte[0];
var exception = Assert.Throws <ArgumentOutOfRangeException>(() => signatureService.ComputeCommitment(commitmentSecret));
Assert.IsTrue(exception.Message.StartsWith("[commitmentSecret] cannot be less than or equal to 0."));
}
public void TestComputeCommitmentNullSecret()
{
var signatureService = new MultiSignature(_sepSecp256K1);
byte[] commitmentSecret = null;
var exception =
// ReSharper disable once ExpressionIsAlwaysNull
Assert.Throws <ArgumentNullException>(() => signatureService.ComputeCommitment(commitmentSecret));
Assert.IsTrue(exception.Message.StartsWith("[commitmentSecret] cannot be Null."));
}
public void TestVerifySignatureShareOk()
{
var signatureService = new MultiSignature(_sepSecp256K1);
var signers = new List <byte[]>();
var commitmentSecrets = new List <byte[]>();
var commitments = new List <byte[]>();
var alice = new Participant("Alice");
var bob = new Participant("Bob");
var carol = new Participant("Carol");
long bitmap = 0;
var message = "The quick brown fox jumps over the lazy dog.".ToHexEncodedByteArray();
signers.Add(alice.PublicKey);
signers.Add(bob.PublicKey);
signers.Add(carol.PublicKey);
for (var i = 0; i < signers.Count; i++)
{
bitmap = (bitmap << 1) | 1;
commitmentSecrets.Add(signatureService.ComputeCommitmentSecret());
commitments.Add(signatureService.ComputeCommitment(commitmentSecrets[i]));
}
var aggregatedCommitment = signatureService.AggregateCommitments(commitments, bitmap);
var challenge =
signatureService.ComputeChallenge(signers, alice.PublicKey, aggregatedCommitment, message, bitmap);
var signature = signatureService.ComputeSignatureShare(challenge, alice.PrivateKey, commitmentSecrets[0]);
Assert.IsTrue(signatureService.VerifySignatureShare(
signers,
alice.PublicKey,
signature,
aggregatedCommitment,
commitments[0],
message,
bitmap));
}