/// <summary>
/// Adds or replace a given file with name filename with data from sourceStream
/// </summary>
/// <param name="filename">The filename used inside the pak</param>
/// <param name="sourceStream">Source Stream of file to be added</param>
/// <param name="CreateTime">Time to use as original file creation time</param>
/// <param name="ModifyTime">Time to use as last modified time</param>
/// <param name="autoSpareSpace">Enable adding 25% of the sourceStream size as padding when not replacing a file</param>
/// <param name="pfi">AAPakFileInfo of the newly added or modified file</param>
/// <returns></returns>
public bool AddFileFromStream(string filename, Stream sourceStream, DateTime CreateTime, DateTime ModifyTime, bool autoSpareSpace, out AAPakFileInfo pfi)
{
pfi = nullAAPakFileInfo;
if (readOnly)
{
return(false);
}
bool addAsNew = true;
// Try to find the existing file
if (GetFileByName(filename, ref pfi))
{
var reservedSizeMax = pfi.size + pfi.paddingSize;
addAsNew = (sourceStream.Length > reservedSizeMax);
// Bugfix: If we have inssuficient space, make sure to delete the old file first as well
if (addAsNew)
{
DeleteFile(pfi);
}
}
if (addAsNew)
{
return(AddAsNewFile(filename, sourceStream, CreateTime, ModifyTime, autoSpareSpace, out pfi));
}
else
{
return(ReplaceFile(ref pfi, sourceStream, ModifyTime));
}
}
/// <summary>
/// Exports a given file as a Stream
/// </summary>
/// <param name="file">AAPakFileInfo of the file to be exported</param>
/// <returns>Returns a SubStream of file within the pak</returns>
public Stream ExportFileAsStream(AAPakFileInfo file)
{
return(new SubStream(_gpFileStream, file.offset, file.size));
}
/// <summary>
/// Writes current files info back into FAT (encrypted)
/// </summary>
/// <returns>Returns true on success</returns>
public bool WriteToFAT()
{
// Read all File Table Data into Memory
FAT.SetLength(0);
int bufSize = 0x150; // Marshal.SizeOf(typeof(AAPakFileInfo));
MemoryStream ms = new MemoryStream(bufSize); // Could probably do without the intermediate memorystream, but it's easier to process
BinaryWriter writer = new BinaryWriter(ms);
// Init File Counts
var totalFileCount = _owner.files.Count + _owner.extraFiles.Count;
var filesToGo = _owner.files.Count;
var extrasToGo = _owner.extraFiles.Count;
int fileIndex = 0;
int extrasIndex = 0;
for (int i = 0; i < totalFileCount; i++)
{
ms.Position = 0;
AAPakFileInfo pfi = null;
if (_owner.PakType == PakFileType.PakTypeA)
{
// TypeA has files first, extra files after that
if (filesToGo > 0)
{
filesToGo--;
pfi = _owner.files[fileIndex];
fileIndex++;
}
else
if (extrasToGo > 0)
{
extrasToGo--;
pfi = _owner.extraFiles[extrasIndex];
extrasIndex++;
}
else
{
// If we get here, your PC cannot math and something went wrong
pfi = null;
break;
}
}
else
if (_owner.PakType == PakFileType.PakTypeB)
{
// TypeA has files first, extra files after that
if (extrasToGo > 0)
{
extrasToGo--;
pfi = _owner.extraFiles[extrasIndex];
extrasIndex++;
}
else
if (filesToGo > 0)
{
filesToGo--;
pfi = _owner.files[fileIndex];
fileIndex++;
}
else
{
// If we get here, your PC cannot math and something went wrong
pfi = null;
break;
}
}
else
{
// Unsupported Type somehow
}
if (_owner.PakType == PakFileType.PakTypeA)
{
// Manually write the string for filename
for (int c = 0; c < 0x108; c++)
{
byte ch = 0;
if (c < pfi.name.Length)
{
ch = (byte)pfi.name[c];
}
writer.Write(ch);
}
writer.Write(pfi.offset);
writer.Write(pfi.size);
writer.Write(pfi.sizeDuplicate);
writer.Write(pfi.paddingSize);
writer.Write(pfi.md5);
writer.Write(pfi.dummy1);
writer.Write(pfi.createTime);
writer.Write(pfi.modifyTime);
writer.Write(pfi.dummy2);
}
else
if (_owner.PakType == PakFileType.PakTypeB)
{
writer.Write(pfi.paddingSize);
writer.Write(pfi.md5);
writer.Write(pfi.dummy1);
writer.Write(pfi.size);
// Manually write the string for filename
for (int c = 0; c < 0x108; c++)
{
byte ch = 0;
if (c < pfi.name.Length)
{
ch = (byte)pfi.name[c];
}
writer.Write(ch);
}
writer.Write(pfi.sizeDuplicate);
writer.Write(pfi.offset);
writer.Write(pfi.modifyTime);
writer.Write(pfi.createTime);
writer.Write(pfi.dummy2);
}
else
{
// Uhm, what now ?
}
// encrypt and write our new file into the FAT memory stream
byte[] decryptedFileData = new byte[bufSize];
ms.Position = 0;
ms.Read(decryptedFileData, 0, bufSize);
byte[] rawFileData = EncryptAES(decryptedFileData, key, true); // encrypt header data
FAT.Write(rawFileData, 0, bufSize);
}
ms.Dispose();
// Calculate padding to header
var dif = (FAT.Length % 0x200);
if (dif > 0)
{
var pad = (0x200 - dif);
FAT.SetLength(FAT.Length + pad);
FAT.Position = FAT.Length;
}
// Update header info
fileCount = (uint)_owner.files.Count;
extraFileCount = (uint)_owner.extraFiles.Count;
// Stretch size for header
FAT.SetLength(FAT.Length + headerSize);
// Encrypt the Header data
EncryptHeaderData();
// Write encrypted header
FAT.Write(rawData, 0, 0x20);
return(true);
}
/// <summary>
/// Read and decrypt the File Details Table that was loaded into the FAT MemoryStream
/// </summary>
public void ReadFileTable()
{
// Check aa.bms QuickBMS file for reference
FAT.Position = 0;
int bufSize = 0x150; // Marshal.SizeOf(typeof(AAPakFileInfo));
MemoryStream ms = new MemoryStream(bufSize); // Could probably do without the intermediate memorystream, but it's easier to process
BinaryReader reader = new BinaryReader(ms);
// Read the Files
_owner.files.Clear();
_owner.extraFiles.Clear();
var totalFileCount = fileCount + extraFileCount;
var filesToGo = fileCount;
var extraToGo = extraFileCount;
for (uint i = 0; i < totalFileCount; i++)
{
// Read and decrypt a fileinfo block
byte[] rawFileData = new byte[bufSize]; // decrypted header data
FAT.Read(rawFileData, 0, bufSize);
byte[] decryptedFileData = EncryptAES(rawFileData, key, false);
// Read decrypted data into a AAPakFileInfo
ms.SetLength(0);
ms.Write(decryptedFileData, 0, bufSize);
ms.Position = 0;
AAPakFileInfo pfi = new AAPakFileInfo();
if (_owner.PakType == PakFileType.PakTypeA)
{
// Manually read the string for filename
pfi.name = "";
for (int c = 0; c < 0x108; c++)
{
byte ch = reader.ReadByte();
if (ch != 0)
{
pfi.name += (char)ch;
}
else
{
break;
}
}
ms.Position = 0x108;
pfi.offset = reader.ReadInt64();
pfi.size = reader.ReadInt64();
pfi.sizeDuplicate = reader.ReadInt64();
pfi.paddingSize = reader.ReadInt32();
pfi.md5 = reader.ReadBytes(16);
pfi.dummy1 = reader.ReadUInt32(); // observed 0x00000000
pfi.createTime = reader.ReadInt64();
pfi.modifyTime = reader.ReadInt64();
pfi.dummy2 = reader.ReadUInt64(); // unused ?
}
else
if (_owner.PakType == PakFileType.PakTypeB)
{
pfi.paddingSize = reader.ReadInt32();
pfi.md5 = reader.ReadBytes(16);
pfi.dummy1 = reader.ReadUInt32(); // 0x80000000
pfi.size = reader.ReadInt64();
// Manually read the string for filename
pfi.name = "";
for (int c = 0; c < 0x108; c++)
{
byte ch = reader.ReadByte();
if (ch != 0)
{
pfi.name += (char)ch;
}
else
{
break;
}
}
ms.Position = 0x128;
pfi.sizeDuplicate = reader.ReadInt64();
pfi.offset = reader.ReadInt64();
pfi.modifyTime = reader.ReadInt64();
pfi.createTime = reader.ReadInt64();
pfi.dummy2 = reader.ReadUInt64(); // unused ?
}
if (_owner.PakType == PakFileType.PakTypeA)
{
// TypeA has files first and extra files last
if (filesToGo > 0)
{
filesToGo--;
_owner.files.Add(pfi);
}
else
if (extraToGo > 0)
{
// "Extra" Files. It looks like these are old deleted files renamed to "__unused__"
// There might be more to these, but can't be sure at this moment, looks like they are 512 byte blocks on my paks
extraToGo--;
_owner.extraFiles.Add(pfi);
}
}
else
if (_owner.PakType == PakFileType.PakTypeB)
{
// TypeB has extra files first and normal files last
if (extraToGo > 0)
{
extraToGo--;
_owner.extraFiles.Add(pfi);
}
else
if (filesToGo > 0)
{
filesToGo--;
_owner.files.Add(pfi);
}
}
else
{
// Call the police, illegal Types are invading our safespace
}
/*
* // Debug stuff
* if (pfi.name == "bin32/archeage.exe")
* {
* ByteArrayToHexFile(decryptedFileData, "file-"+ i.ToString() + ".hex");
* File.WriteAllBytes("file-" + i.ToString() + ".bin",decryptedFileData);
* }
*/
// Update our "end of file data" location if needed
if ((pfi.offset + pfi.size + pfi.paddingSize) > AddFileOffset)
{
AddFileOffset = pfi.offset + pfi.size + pfi.paddingSize;
}
}
ms.Dispose();
}
/// <summary>
/// Adds a new file into the pak
/// </summary>
/// <param name="filename">Filename of the file inside the pakfile</param>
/// <param name="sourceStream">Source Stream containing the file data</param>
/// <param name="CreateTime">Time to use as initial file creation timestamp</param>
/// <param name="ModifyTime">Time to use as last modified timestamp</param>
/// <param name="autoSpareSpace">When set, tries to pre-allocate extra free space at the end of the file, this will be 25% of the filesize if used. If a "deleted file" is used, this parameter is ignored</param>
/// <param name="pfi">Returns the fileinfo of the newly created file</param>
/// <returns>Returns true on success</returns>
public bool AddAsNewFile(string filename, Stream sourceStream, DateTime CreateTime, DateTime ModifyTime, bool autoSpareSpace, out AAPakFileInfo pfi)
{
// When we have a new file, or previous space wasn't enough, we will add it where the file table starts, and move the file table
if (readOnly)
{
pfi = nullAAPakFileInfo;
return(false);
}
bool addedAtTheEnd = true;
AAPakFileInfo newFile = new AAPakFileInfo();
newFile.name = filename;
newFile.offset = _header.FirstFileInfoOffset;
newFile.size = sourceStream.Length;
newFile.sizeDuplicate = newFile.size;
newFile.createTime = CreateTime.ToFileTime();
newFile.modifyTime = ModifyTime.ToFileTime();
newFile.paddingSize = 0;
newFile.md5 = new byte[16];
if (PakType == PakFileType.PakTypeB)
{
newFile.dummy1 = 0x80000000;
}
// check if we have "unused" space in extraFiles that we can use
for (int i = 0; i < extraFiles.Count; i++)
{
if (newFile.size <= extraFiles[i].size)
{
// Copy the spare file's properties and remove it from extraFiles
newFile.offset = extraFiles[i].offset;
newFile.paddingSize = (int)(extraFiles[i].size - newFile.size); // This should already be aligned
addedAtTheEnd = false;
extraFiles.Remove(extraFiles[i]);
break;
}
}
if (addedAtTheEnd)
{
// Only need to calculate padding if we are adding at the end
var dif = (newFile.size % 0x200);
if (dif > 0)
{
newFile.paddingSize = (int)(0x200 - dif);
}
if (autoSpareSpace)
{
// If autoSpareSpace is used to add files, we will reserve some extra space as padding
// Add 25% by default
var spareSpace = (newFile.size / 4);
spareSpace -= (spareSpace % 0x200); // Align the spare space
newFile.paddingSize += (int)spareSpace;
}
}
// Add to files list
files.Add(newFile);
isDirty = true;
// Add File Data
_gpFileStream.Position = newFile.offset;
sourceStream.Position = 0;
sourceStream.CopyTo(_gpFileStream);
if (addedAtTheEnd)
{
_header.FirstFileInfoOffset = newFile.offset + newFile.size + newFile.paddingSize;
}
UpdateMD5(newFile); // TODO: optimize this to calculate WHILE we are copying the stream
// Set output
pfi = newFile;
return(true);
}