/// <summary>
/// Unpack and decrypt the contents of cache.bin.
/// </summary>
private static void UnPack(string cachePath)
{
Console.WriteLine("Unpacking...");
if (!File.Exists(cachePath))
{
throw new FileNotFoundException($"{cachePath} is an invalid cache.bin file!");
}
payload = File.ReadAllBytes(cachePath);
Decrypt();
using (MemoryStream stream = new MemoryStream(payload))
{
using (BinaryReader reader = new BinaryReader(stream))
{
reader.ReadUInt32(); // version?
uint chunkCount = reader.ReadUInt32();
for (uint i = 0u; i < chunkCount; i++)
{
chunks.Add(new Chunk(reader));
}
}
}
Console.WriteLine("Saving chunk keys as keys.json...");
File.WriteAllText("keys.json", ChunkKeyJson.Save(chunks));
}
public static string Save(IEnumerable <Chunk> fileChunks)
{
var keys = new ChunkKeyJson();
foreach (Chunk chunk in fileChunks)
{
keys.Chunks.Add(new ChunkKey
{
Id = chunk.ChunkHeader.Id,
Key1 = chunk.ChunkHeader.Key1,
Key2 = chunk.ChunkHeader.Key2,
Key3 = chunk.ChunkHeader.Key3
});
}
return(JsonConvert.SerializeObject(keys));
}
/// <summary>
/// Pack and encrypt the contents of modified chunk files into a new cache.bin.
/// </summary>
private static void Pack(string assetPath)
{
Console.WriteLine("Packing...");
if (!Directory.Exists(assetPath))
{
throw new DirectoryNotFoundException($"{assetPath} is an invalid directory!");
}
string keysPath = Path.Combine(assetPath, "keys.json");
if (!File.Exists(keysPath))
{
throw new FileNotFoundException($"{assetPath} doesn't contain the keys.json file!");
}
ChunkKeyJson chunkKeys = JsonConvert.DeserializeObject <ChunkKeyJson>(File.ReadAllText(keysPath));
string[] chunkFilePaths = Directory.GetFiles(assetPath, "*.raw");
if (chunkFilePaths.Length < 9)
{
throw new InvalidDataException($"Invalid amount of chunks files, expected 9 got {chunkFilePaths.Length}!");
}
foreach (string chunkPath in chunkFilePaths)
{
uint id = uint.Parse(Path.GetFileNameWithoutExtension(chunkPath));
ChunkKeyJson.ChunkKey chunkKey = chunkKeys.Chunks.SingleOrDefault(c => c.Id == id);
chunks.Add(new Chunk(chunkKey, File.ReadAllBytes(chunkPath)));
}
payload = BitConverter.GetBytes(1u)
.Concat(BitConverter.GetBytes(chunkFilePaths.Length))
.ToArray();
chunks.ForEach(c => payload = payload.Concat(c.Payload).ToArray());
Decrypt();
Console.WriteLine("Saving chunks as cache.bin...");
File.WriteAllBytes(Path.Combine(assetPath, "cache.bin"), payload);
}