public void TestRfcCompatible()
{
using (IPasswordDerivedBytes pd = DerivedBytes(TEST_PASSWORD))
{
pd.IterationCount = 1000;
byte[] sha1Hash = SHA1.Create().ComputeHash(Password.Encoding.GetBytes(TEST_PASSWORD));
Rfc2898DeriveBytes pbytes = new Rfc2898DeriveBytes(sha1Hash, DefaultSalt.ToArray(), 1000);
Assert.AreEqual(pd.GetBytes(20), pbytes.GetBytes(20));
Assert.AreEqual(pd.GetBytes(35), pbytes.GetBytes(35));
byte[] test1 = pd.GetBytes(40);
byte[] test2 = pbytes.GetBytes(40);
//'RFC' implementation resuses 5 bytes already generated with 'GetBytes(35)', if you call reset these behave the same
Assert.AreNotEqual(test1, test2);
Buffer.BlockCopy(test2, 5, test2, 0, 35); //strip the first five bytes
Array.Resize(ref test1, 35);
Array.Resize(ref test2, 35);
Assert.AreEqual(test1, test2); //now they should be the same
}
}
public void TestRfcRandom()
{
Rfc2898DeriveBytes pd1 = new Rfc2898DeriveBytes(Password.Encoding.GetBytes(TEST_PASSWORD), DefaultSalt.ToArray(), 10);
using (IPasswordDerivedBytes pd2 = new TestRfc2898(Password.Encoding.GetBytes(TEST_PASSWORD), DefaultSalt.ToArray(), 10))
{
Assert.AreEqual(pd1.GetBytes(20), pd2.GetBytes(20));
Assert.AreEqual(pd1.GetBytes(35), pd2.GetBytes(35));
Assert.AreEqual(pd1.GetBytes(16), pd2.GetBytes(16));
Random r = new Random();
for (int i = 0; i < 1000; i++)
{
int size = r.Next(2, 60);
Assert.AreEqual(pd1.GetBytes(size), pd2.GetBytes(size));
}
}
}
protected override IPasswordDerivedBytes DerivedBytes(string input)
{
return(new TestRfc2898(Password.Encoding.GetBytes(input), DefaultSalt.ToArray(), DefaultIterations));
}
