/// <summary>
/// Returns this instance of PK2Entry as byte[] which can be used to be written back to the PK2 archive
/// </summary>
/// <returns></returns>
public byte[] ToByteArray()
{
var result = new byte[128];
using (var stream = new StreamWorker(result, StreamOperation.Write))
{
stream.WriteByte(Type);
stream.WriteString(Name);
stream.WriteByteArray(new byte[81 - Name.Length]); //Write the name padding
stream.WriteLong(AccessTime.Ticks);
stream.WriteLong(CreateTime.Ticks);
stream.WriteLong(ModifyTime.Ticks);
stream.WriteULong(Position);
stream.WriteUInt(Size);
stream.WriteULong(NextChain);
stream.WriteByteArray(new byte[2]); //Padding to reach 128 bytes length
}
//If we have an encypted archive we have to encrypt this, too
if (BlowfishUtilities.GetBlowfish() != null)
{
result = BlowfishUtilities.GetBlowfish().Encode(result);
}
return(result);
}
/// <summary>
/// Initializes a new instance of the <see cref="PK2Block" /> class.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The block offset.</param>
public PK2Block(byte[] buffer, ulong offset)
{
Entries = new PK2Entry[20];
Offset = offset;
using (var streamWorker = new StreamWorker(buffer, StreamOperation.Read))
{
for (var i = 0; i < 20; i++)
{
var entryBuffer = streamWorker.ReadByteArray(128);
if (BlowfishUtilities.GetBlowfish() != null)
{
entryBuffer = BlowfishUtilities.GetBlowfish().Decode(entryBuffer);
}
Entries[i] = new PK2Entry(entryBuffer, this, (byte)i);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PK2Archive"/> class.
/// The key is set to the isro standard encryption key.
/// Do not provide any baseKey, if you wish to use the default base key for the archive.
/// </summary>
/// <exception cref="System.IO.FileNotFoundException"></exception>
/// <exception cref="SlimPK2.Security.BlowfishSecurityException"></exception>
/// <exception cref="SlimPK2.Types.InvalidHeaderException"></exception>
public PK2Archive(string path, PK2Config config = null)
{
if (!File.Exists(path))
{
throw new FileNotFoundException(path);
}
//Initialize default config
if (config == null)
{
config = PK2Config.GetDefault();
}
//assign the config to this instance
Config = config;
//Create file reader...
FileAdapter.SetInstance(new FileAdapter(path));
Path = path;
//Read header...
Header = new PK2Header(FileAdapter.GetInstance().ReadData(0, 256));
if (Header.Encrypted)
{
var blowfishKey = BlowfishUtilities.GenerateFinalBlowfishKey(Config.Key, Config.BaseKey);
var blowfish = new Blowfish();
blowfish.Initialize(blowfishKey);
BlowfishUtilities.SetBlowfish(blowfish);
var tempChecksum =
BlowfishUtilities.GetBlowfish().Encode(Encoding.ASCII.GetBytes("Joymax Pak File"));
//Check if the security checksum equals the generated checksum
if (tempChecksum[0] != Header.SecurityChecksum[0] ||
tempChecksum[1] != Header.SecurityChecksum[1] ||
tempChecksum[2] != Header.SecurityChecksum[2])
{
throw new BlowfishSecurityException(Config.Key);
}
}
if (Config.Mode != PK2Mode.FreeBrowse)
{
switch (Config.Mode)
{
case PK2Mode.IndexBlocks:
Blocks = new List <PK2Block>();
ReadBlockAt(256);
break;
case PK2Mode.Index:
_files = new List <PK2File>();
_directories = new List <PK2Directory>();
ReadBlockAt(256, new PK2Directory());
break;
}
}
else
{
_navigator = new PK2Navigator();
}
Loaded = true;
}