/// <summary>
/// Repacks and encrypts DS3's regulation BND4 to the specified path.
/// </summary>
public static void EncryptDS3Regulation(string path, BND4 bnd)
{
byte[] bytes = bnd.Write();
bytes = EncryptByteArray(ds3RegulationKey, bytes);
Directory.CreateDirectory(Path.GetDirectoryName(path));
File.WriteAllBytes(path, bytes);
}
private void Read(BinaryReaderEx br)
{
br = SFUtil.GetDecompressedBR(br, out DCX.Type compression);
Compression = compression;
Files = BND4.ReadHeader(this, br);
DataBR = br;
}
/// <summary>
/// Decrypts and unpacks DS2's regulation BND4 from the specified path.
/// </summary>
public static BND4 DecryptDS2Regulation(string path)
{
byte[] bytes = File.ReadAllBytes(path);
byte[] iv = new byte[16];
iv[0] = 0x80;
Array.Copy(bytes, 0, iv, 1, 11);
iv[15] = 1;
byte[] input = new byte[bytes.Length - 32];
Array.Copy(bytes, 32, input, 0, bytes.Length - 32);
using (var ms = new MemoryStream(input))
{
byte[] decrypted = CryptographyUtility.DecryptAesCtr(ms, ds2RegulationKey, iv);
return(BND4.Read(decrypted));
}
}
/// <summary>
/// Decrypts and unpacks DS3's regulation BND4 from the specified path.
/// </summary>
public static BND4 DecryptDS3Regulation(string path)
{
byte[] bytes = File.ReadAllBytes(path);
bytes = DecryptByteArray(ds3RegulationKey, bytes);
return(BND4.Read(bytes));
}
