protected void PrepareKey(byte[] pass)
{
rnd = SteganographyProvider.PrepareISAAC(pass);
for (int i = 0, isaac = 0; i < key.Length; i++, isaac++)
{
if (isaac >= ISAAC.SIZE)
{
isaac = 0;
rnd.Isaac();
}
key[i] = (byte)(key[i] ^ rnd.rsl[isaac]);
}
}
public override void ImprintData(byte[] data)
{
string pass = SteganographyProvider.AskPassword();
if (pass != null && pass.Length > 0)
{
PrepareKey(Encoding.UTF8.GetBytes(pass));
}
for (int i = 0; i < data.Length; i++)
{
data[i] ^= key[i % key.Length];
}
vector = data;
image.RemoveNonCritical();
ImprintPNG(data);
}