private byte[] Encrypt(byte[] data)
{
var isX7 = Name.EndsWith(".x7", StringComparison.InvariantCultureIgnoreCase);
if (Name.EndsWith(".lua", StringComparison.InvariantCultureIgnoreCase) || isX7)
{
if (isX7)
{
data = S4Crypto.EncryptX7(data);
}
data = S4Crypto.EncryptAES(data);
S4Crypto.Encrypt(data);
}
Length = data.Length;
S4Crypto.EncryptCapped(data);
if (data.Length < 1048576)
{
data = miniLzo.Compress(data);
}
S4Crypto.SwapBytes(data);
return(data);
}
private byte[] Encrypt(byte[] data)
{
var cipher = S4Crypto.EncryptAES(data);
S4Crypto.Encrypt(cipher);
return(cipher);
}
public static long ComputeHash(byte[] data, string fullName)
{
long dataCRC = Hash.GetUInt32 <CRC32>(data);
long pathCRC = Hash.GetUInt32 <CRC32>(Encoding.ASCII.GetBytes(fullName));
var finalCRC = dataCRC | (pathCRC << 32);
var tmp = BitConverter.GetBytes(finalCRC);
S4Crypto.EncryptCapped(tmp);
return(BitConverter.ToInt64(tmp, 0));
}
public static byte[] DecryptS4(byte[] data)
{
int realSize;
byte[] buffer;
using (var r = data.ToBinaryReader())
{
realSize = r.ReadInt32();
buffer = r.ReadToEnd();
}
S4Crypto.Decrypt(buffer, 0, 0);
return(miniLzo.Decompress(buffer, realSize));
}
public static byte[] EncryptS4(byte[] data)
{
var realSize = data.Length;
var buffer = miniLzo.Compress(data);
S4Crypto.Encrypt(buffer, 0, 0);
using (var w = new BinaryWriter(new MemoryStream()))
{
w.Write(realSize);
w.Write(buffer);
return(w.ToArray());
}
}
private byte[] DecryptEntry(byte[] data)
{
S4Crypto.DecryptCapped(data);
return(data);
}
private byte[] Decrypt(byte[] data)
{
S4Crypto.Decrypt(data);
return(S4Crypto.DecryptAES(data));
}