public void Decrypt(string inputFile, byte[] password)
{
byte[] key = password;
string outputFile = Path.ChangeExtension(inputFile, null);
Magma magma = new Magma();
magma.SetKey(key);
using (FileStream fs = new FileStream(inputFile, FileMode.Open))
{
using (FileStream fw = new FileStream(outputFile, FileMode.Create))
{
byte[] buf = new byte[magma.BlockSize];
while (fs.Read(buf, 0, magma.BlockSize) > 0)
{
byte[] encrypted = magma.Decrypt(buf);
if (fs.Position == fs.Length)
{
int zeros = encrypted.Count(e => e == 0);
fw.Write(encrypted, 0, magma.BlockSize - zeros);
}
else
{
fw.Write(encrypted, 0, encrypted.Length);
}
}
}
}
}
public void Encrypt(string inputFile, byte[] password)
{
string outputFile = inputFile + Settings.ENCRYPTION_EXTENSION;
byte[] key = password;
ICIpher cipher = new Magma();
cipher.SetKey(key);
using (FileStream fs = new FileStream(inputFile, FileMode.Open))
{
using (FileStream fw = new FileStream(outputFile, FileMode.Create))
{
byte[] buf = new byte[cipher.BlockSize];
long pos = 0;
while (fs.Read(buf, 0, cipher.BlockSize) == cipher.BlockSize)
{
byte[] encrypted = cipher.Encrypt(buf);
fw.Write(encrypted, 0, encrypted.Length);
pos = fs.Position;
}
if (fs.Length % cipher.BlockSize != 0)
{
byte[] buf2 = new byte[cipher.BlockSize];
Array.Copy(buf, buf2, fs.Length % cipher.BlockSize);
byte[] encrypted = cipher.Encrypt(buf2);
fw.Write(encrypted, 0, encrypted.Length);
}
}
}
}
