public void TestWriteLong()
{
byte[] data = new byte[4096 * 8];
fixed (byte* lp = data)
{
using (var bs = new BinaryStreamPointerWrapper(lp, data.Length))
{
DebugStopwatch sw = new DebugStopwatch();
var time = sw.TimeEventMedian(() =>
{
for (int repeat = 0; repeat < 1000; repeat++)
{
bs.Position = 0;
for (int x = 0; x < 1000; x++)
{
bs.Write((long)x);
bs.Write((long)x);
bs.Write((long)x);
bs.Write((long)x);
}
}
});
Console.WriteLine((4 * 1000 * 1000) / time / 1000 / 1000);
}
}
}
static unsafe byte[] CreateSessionData(byte[] sessionSecret, SrpUserCredential user)
{
byte[] initializationVector = SaltGenerator.Create(16);
int len = sessionSecret.Length;
int blockLen = (len + 15) & ~15; //Add 15, then round down. (Effecitvely rounds up to the nearest 128 bit boundary).
byte[] dataToEncrypt = new byte[blockLen];
sessionSecret.CopyTo(dataToEncrypt, 0);
//fill the remainder of the block with random bits
if (len != blockLen)
{
SaltGenerator.Create(blockLen - len).CopyTo(dataToEncrypt, len);
}
byte[] ticket = new byte[1 + 16 + 8 + 16 + 2 + blockLen + 32];
var aes = new RijndaelManaged();
aes.Key = user.ServerEncryptionkey;
aes.IV = initializationVector;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
var decrypt = aes.CreateEncryptor();
var encryptedData = decrypt.TransformFinalBlock(dataToEncrypt, 0, dataToEncrypt.Length);
fixed (byte* lp = ticket)
{
var stream = new BinaryStreamPointerWrapper(lp, ticket.Length);
stream.Write((byte)1);
stream.Write((short)len);
stream.Write(user.ServerKeyName);
stream.Write(DateTime.UtcNow);
stream.Write(initializationVector);
stream.Write(encryptedData);
stream.Write(HMAC<Sha256Digest>.Compute(user.ServerHMACKey, ticket, 0, ticket.Length - 32));
}
return ticket;
}
