public void TestComputeSignatureShareNullPrivateKey()
{
var signatureService = new MultiSignature(_sepSecp256K1);
byte[] challenge = Digests.Sha3("dummy challenge".ToHexEncodedByteArray());
byte[] privateKey = null;
byte[] commitmentSecret = signatureService.ComputeCommitmentSecret();
var exception = Assert.Throws <ArgumentNullException>(() =>
signatureService.ComputeSignatureShare(challenge, privateKey, commitmentSecret));
Console.WriteLine(exception.Message);
Assert.IsTrue(exception.Message.StartsWith("[privateKey] cannot be Null."));
}
public void TestComputeSignatureShareEmptyCommitmentSecret()
{
var signatureService = new MultiSignature(_sepSecp256K1);
byte[] commitmentSecret = new byte[0];
byte[] challenge = Digests.Sha3("dummy challenge".ToHexEncodedByteArray());
byte[] privateKey = new Participant("Alice").PrivateKey;
var exception = Assert.Throws <ArgumentOutOfRangeException>(() =>
signatureService.ComputeSignatureShare(challenge, privateKey, commitmentSecret));
Console.WriteLine(exception.Message);
Assert.IsTrue(exception.Message.StartsWith("[commitmentSecret] cannot be less than or equal to 0."));
}
public void TestComputeSignatureShareNullChallenge()
{
var signatureService = new MultiSignature(_sepSecp256K1);
byte[] challenge = null;
byte[] privateKey = new Participant("Alice").PrivateKey;
byte[] commitmentSecret = signatureService.ComputeCommitmentSecret();
var exception = Assert.Throws <ArgumentNullException>(() =>
signatureService.ComputeSignatureShare(challenge, privateKey, commitmentSecret));
Console.WriteLine(exception.Message);
Assert.IsTrue(exception.Message.StartsWith("[challenge] 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));
}
