public void Pool_SameEntropyIsSameDigest()
{
var p1 = new EntropyPool();
var p2 = new EntropyPool();
p1.Add(EventFromBytes(_Zero8Bytes));
p2.Add(EventFromBytes(_Zero8Bytes));
CollectionAssert.AreEqual(p1.GetDigest(), p2.GetDigest());
p1.Add(EventFromBytes(_Incrementing16Bytes));
p2.Add(EventFromBytes(_Incrementing16Bytes));
CollectionAssert.AreEqual(p1.GetDigest(), p2.GetDigest());
}
public void Pool_OneEventDigestIsNonZero()
{
var p = new EntropyPool();
p.Add(EventFromBytes(_Zero8Bytes));
Assert.IsFalse(p.GetDigest().All(b => b == 0));
}
public void Pool_NoEntropyIsSameDigest()
{
var p1 = new EntropyPool();
var p2 = new EntropyPool();
CollectionAssert.AreEqual(p1.GetDigest(), p2.GetDigest());
}
public void Pool_CanUseIncrementalHash()
{
var p = new EntropyPool(IncrementalHash.CreateHash(HashAlgorithmName.SHA256));
p.Add(EventFromBytes(_Zero8Bytes));
Assert.IsFalse(p.GetDigest().All(b => b == 0));
}
public void Pool_CanUseDifferentHashAlgorithm()
{
var p = new EntropyPool(new SHA256Managed());
p.Add(EventFromBytes(_Zero8Bytes));
Assert.IsFalse(p.GetDigest().All(b => b == 0));
}
public void Pool_CountersResetAfterDigest()
{
var p = new EntropyPool();
p.Add(EventFromBytes(_Zero8Bytes));
Assert.AreEqual(p.TotalEntropyBytes, 8);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 8);
p.GetDigest();
Assert.AreEqual(p.TotalEntropyBytes, 8);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 0);
p.Add(EventFromBytes(_Zero16Bytes));
Assert.AreEqual(p.TotalEntropyBytes, 24);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 16);
p.GetDigest();
Assert.AreEqual(p.TotalEntropyBytes, 24);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 0);
}
//[TestMethod]
public void Pool_CanUseNonShaBasedAlgorithm()
{
var blake2b = System.Data.HashFunction.Blake2.Blake2BFactory.Instance.Create();
Assert.Fail("TODO: must change the EntropyPool to accept an object which we can plug various hash implementations into.");
var p = new EntropyPool(new SHA256Managed());
p.Add(EventFromBytes(_Zero8Bytes));
Assert.IsFalse(p.GetDigest().All(b => b == 0));
}
public void Pool_GetDigestResetsCountsBySource()
{
var p = new EntropyPool();
var evt = EventFromBytes(_Zero16Bytes);
p.Add(evt);
Assert.AreEqual(p.GetCountOfBytesBySource().Count, 1);
var digest = p.GetDigest();
Assert.AreEqual(p.GetCountOfBytesBySource().Count, 0);
}