public void TestHashStreamWrite()
{
Random r = new Random();
byte[][] test =
new byte[][]
{
new byte[300],
new byte[1],
new byte[500],
new byte[11],
new byte[1],
new byte[1000],
};
using (HashStream hs = new HashStream(new SHA256Managed()))
using (MemoryStream ms = new MemoryStream())
using (HashStream hsWrap = new HashStream(new SHA256Managed(), ms))
{
Assert.IsTrue(hs.CanWrite);
long len = 0;
foreach (byte[] bytes in test)
{
len += bytes.Length;
r.NextBytes(bytes);
hsWrap.Write(bytes, 0, bytes.Length);
hs.Write(bytes, 0, bytes.Length);
}
for (int i = 0; i < 5; i++)
{
len += 1;
byte val = (byte)r.Next(255);
hsWrap.WriteByte(val);
hs.WriteByte(val);
}
Assert.AreEqual(len, ms.Position);
Hash expect = Hash.SHA256(ms.ToArray());
Hash actual = hs.Close();
Assert.AreEqual(expect, actual);
Assert.AreEqual(expect.ToArray(), actual.ToArray());
Assert.AreEqual(expect.ToString(), actual.ToString());
//wrapped test
actual = hsWrap.FinalizeHash();
Assert.AreEqual(expect, actual);
Assert.AreEqual(expect.ToArray(), actual.ToArray());
Assert.AreEqual(expect.ToString(), actual.ToString());
}
}
public void TestHashStreamRead()
{
Random r = new Random();
byte[] bytes = new byte[1000];
r.NextBytes(bytes);
using (HashStream hs = new HashStream(new SHA256Managed(), new MemoryStream(bytes)))
{
for (int i = 0; i < 5; i++)
{
while (hs.Position < hs.Length)
{
hs.ReadByte();
int amt = r.Next(255);
byte[] tmp = new byte[amt];
hs.Read(tmp, 0, tmp.Length);
}
}
Hash expect = Hash.SHA256(bytes);
Hash actual = hs.FinalizeHash();
Assert.AreEqual(expect, actual);
Assert.AreEqual(expect.ToArray(), actual.ToArray());
Assert.AreEqual(expect.ToString(), actual.ToString());
//still valid after FinalizeHash(); however, hash is restarted
hs.Position = 0;
IOStream.Read(hs, bytes.Length);
actual = hs.FinalizeHash();
Assert.AreEqual(expect, actual);
Assert.AreEqual(expect.ToArray(), actual.ToArray());
Assert.AreEqual(expect.ToString(), actual.ToString());
}
}
