private byte[] MacTest2(string FileName, byte[] IKm)
{
using (FileStream inStream = new FileStream(FileName, FileMode.Open))
{
using (MacStream mac = new MacStream(new HMAC(new SHA512(), IKm)))
{
mac.Initialize(inStream);
mac.IsConcurrent = false;
return(mac.ComputeMac());
}
}
}
private bool MacTest3(byte[] IKm)
{
byte[] data = new CSPPrng().GetBytes(33033);
byte[] hash1;
byte[] hash2;
using (MacStream mac1 = new MacStream(new HMAC(new SHA512(), IKm)))
{
mac1.Initialize(new MemoryStream(data));
mac1.IsConcurrent = false;
hash1 = mac1.ComputeMac();
}
using (HMAC mac2 = new HMAC(new SHA512(), IKm))
hash2 = mac2.ComputeMac(data);
return(Evaluate.AreEqual(hash1, hash2));
}
private void HmacDescriptionTest()
{
CSPPrng rng = new CSPPrng();
byte[] data = rng.GetBytes(rng.Next(100, 400));
byte[] key = rng.GetBytes(64);
HMAC mac = new HMAC(Digests.SHA256);
mac.Initialize(key);
byte[] c1 = mac.ComputeMac(data);
MacDescription mds = new MacDescription(64, Digests.SHA256);
MacStream mst = new MacStream(mds, new KeyParams(key));
mst.Initialize(new MemoryStream(data));
byte[] c2 = mst.ComputeMac();
if (!Evaluate.AreEqual(c1, c2))
{
throw new Exception("MacStreamTest: HMAC code arrays are not equal!");
}
}
private void CmacDescriptionTest()
{
CSPPrng rng = new CSPPrng();
byte[] data = rng.GetBytes(rng.Next(100, 400));
byte[] key = rng.GetBytes(32);
byte[] iv = rng.GetBytes(16);
CMAC mac = new CMAC(BlockCiphers.Rijndael);
mac.Initialize(key, iv);
byte[] c1 = mac.ComputeMac(data);
MacDescription mds = new MacDescription(32, BlockCiphers.Rijndael, IVSizes.V128, BlockSizes.B128, RoundCounts.R14);
MacStream mst = new MacStream(mds, new KeyParams(key, iv));
mst.Initialize(new MemoryStream(data));
byte[] c2 = mst.ComputeMac();
if (!Evaluate.AreEqual(c1, c2))
{
throw new Exception("MacStreamTest: CMAC code arrays are not equal!");
}
}
/// <summary>
/// Test the MacStream class implementation
/// <para>Throws an Exception on failure</</para>
/// </summary>
public static void StreamMacTest()
{
byte[] data;
byte[] key;
MemoryStream instrm;
MemoryStream outstrm = new MemoryStream();
using (KeyGenerator kg = new KeyGenerator())
{
data = kg.GetBytes(512);
key = kg.GetBytes(64);
}
// data to digest
instrm = new MemoryStream(data);
byte[] code1;
byte[] code2;
using (MacStream sm = new MacStream(new HMAC(new SHA512(), key)))
{
sm.Initialize(instrm);
code1 = sm.ComputeMac();
}
using (HMAC hm = new HMAC(new SHA512()))
{
hm.Initialize(key);
code2 = hm.ComputeMac(data);
}
// compare the hash codes
if (!Evaluate.AreEqual(code1, code2))
{
throw new Exception();
}
}
