public void Pool_OneEventDigestIsNonZero()
{
var p = new EntropyPool();
p.Add(EventFromBytes(_Zero8Bytes));
Assert.IsFalse(p.GetDigest().All(b => b == 0));
}
public void Pool_List3InterleavedSources()
{
var p = new EntropyPool();
var s1 = new NullSource();
var s2 = new NullSource();
var s3 = new NullSource();
var e1 = new EntropyEvent(_Zero16Bytes, s1);
var e2 = new EntropyEvent(_Zero16Bytes, s2);
var e3 = new EntropyEvent(_Zero16Bytes, s3);
using (var sw = new StreamWriter("pool_3interleaved.txt", false, Encoding.UTF8))
{
sw.WriteLine($"Total: Source 1 : Source 2 : Source 3");
for (int i = 0; i < 10000; i++)
{
if (i % 3 == 0)
{
p.Add(e1);
}
else if (i % 3 == 1)
{
p.Add(e2);
}
else
{
p.Add(e3);
}
var counts = p.GetCountOfBytesBySource();
if (counts.Count == 3)
{
sw.WriteLine($"{p.EntropyBytesSinceLastDigest} :{counts[s1]:N0} :{counts[s2]:N0} :{counts[s3]:N0}");
}
}
}
}
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_NoEntropyIsZero()
{
var p = new EntropyPool();
Assert.AreEqual(p.TotalEntropyBytes, 0);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 0);
}
public void Pool_OneSourceIsLimitedWhenDominating()
{
var p = new EntropyPool();
var evt = EventFromBytes(_Zero16Bytes);
var evt2 = EventFromBytes(_Zero16Bytes);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt); // Ignored.
Assert.AreEqual(p.TotalEntropyBytes, 48);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 48);
p.Add(evt2);
p.Add(evt2);
p.Add(evt2);
Assert.AreEqual(p.TotalEntropyBytes, 96);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 96);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt); // Ignored.
Assert.AreEqual(p.TotalEntropyBytes, 144);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 144);
}
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_OneEventAddsToCounters()
{
var p = new EntropyPool();
p.Add(EventFromBytes(_Zero8Bytes));
Assert.AreEqual(p.TotalEntropyBytes, 8);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 8);
}
//[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);
}
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_First48BytesAreOK()
{
var p = new EntropyPool();
var evt = EventFromBytes(_Zero8Bytes);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
Assert.AreEqual(p.TotalEntropyBytes, 48);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 48);
}
public void Pool_After48BytesAreIgnored()
{
var p = new EntropyPool();
var evt = EventFromBytes(_Zero8Bytes);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt);
p.Add(evt); // This triggers the "too much entropy from one source" thing.
Assert.AreEqual(p.TotalEntropyBytes, 48);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 48);
}
public void Pool_TwoSourcesCanGoBeyond48BytesEachWhenEvenlyDistributed()
{
var p = new EntropyPool();
var evt = EventFromBytes(_Zero16Bytes);
var evt2 = EventFromBytes(_Zero16Bytes);
p.Add(evt);
p.Add(evt2);
p.Add(evt);
p.Add(evt2);
p.Add(evt);
p.Add(evt2);
p.Add(evt);
p.Add(evt2);
Assert.AreEqual(p.TotalEntropyBytes, 128);
Assert.AreEqual(p.EntropyBytesSinceLastDigest, 128);
}
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);
}