public void ShouldVerifyRandomlyGeneratedSignatures(ModeValues mode, DigestSizes digest, Curve curveEnum)
{
var nonces = new List <BigInteger>();
var hashFunction = new HashFunction(mode, digest);
var shaFactory = new NativeShaFactory();
var sha = shaFactory.GetShaInstance(hashFunction);
var hmacFactory = new HmacFactory(shaFactory);
var hmac = hmacFactory.GetHmacInstance(hashFunction);
var subject = new EccDsa(sha, new DeterministicNonceProvider(hmac), EntropyProviderTypes.Random);
var curveFactory = new EccCurveFactory();
var curve = curveFactory.GetCurve(curveEnum);
var domainParams = new EccDomainParameters(curve);
var key = subject.GenerateKeyPair(domainParams).KeyPair;
var rand = new Random800_90();
for (var i = 0; i < 100; i++)
{
var message = rand.GetRandomBitString(1024);
var signature = subject.Sign(domainParams, key, message).Signature;
var verify = subject.Verify(domainParams, key, message, signature);
nonces.Add(signature.R);
Assert.IsTrue(verify.Success, verify.ErrorMessage);
}
// Check nonces for uniqueness
Assert.AreEqual(nonces.Count, nonces.Distinct().Count(), "Repeated nonce detected");
}
public void ShouldComputeCorrectZ(
string label,
Curve curveEnum,
EccKeyPair sPartyA,
EccKeyPair ePartyA,
EccKeyPair sPartyB,
EccKeyPair ePartyB,
BitString expectedZ)
{
var curve = _curveFactory.GetCurve(curveEnum);
EccDomainParameters dp = new EccDomainParameters(curve);
var result = _subject.GenerateSharedSecretZ(
dp,
sPartyA,
sPartyB,
ePartyA,
ePartyA,
ePartyB
);
Assert.That(result.Success);
Assert.AreEqual(expectedZ, result.SharedSecretZ);
}