public void Read(DataStream inStr)
{
using (var decodedStr = new DataStream(new MemoryStream(), 0, -1)) {
// Decode data
Rc4.Run(inStr, Key, decodedStr);
decodedStr.Seek(0, SeekMode.Origin);
DataReader br = new DataReader(decodedStr);
if (br.ReadString(4) != MagicHeader)
{
throw new FormatException("Invalid MagicHeader");
}
br.ReadUInt32(); // CRC, I am not checking it
for (int i = 0; i < MaxEntries; i++)
{
this.entries[i] = Entry.FromStream(decodedStr);
}
}
}
public void Write(DataStream outStr)
{
using (var decodedStr = new DataStream(new MemoryStream(), 0, -1)) {
DataWriter bw = new DataWriter(decodedStr);
bw.Write(MagicHeader);
bw.Write((uint)0x00); // CRC will be updated later
foreach (Entry entry in this.entries)
{
entry.Write(decodedStr);
}
// Calculate CRC and write it
decodedStr.Seek(8, SeekMode.Origin);
uint crc = Crc32.Run(decodedStr, (uint)decodedStr.Length - 8);
decodedStr.Seek(4, SeekMode.Origin);
bw.Write(crc);
// Encode and write
decodedStr.Seek(0, SeekMode.Origin);
Rc4.Run(decodedStr, Key, outStr);
}
}