/**
* Creates a FST by the given raw byte data
*
* @param fstData
* raw decrypted FST data
* @param contentsMappedByIndex
* map of index/content
* @return
*/
public static FST parseFST(byte[] fstData, Dictionary <int, Content> contentsMappedByIndex)
{
if (!Arrays.Equals(Arrays.copyOfRange(fstData, 0, 3), new byte[] { 0x46, 0x53, 0x54 }))
{
//throw new NullPointerException();
return(null);
// throw new IllegalArgumentException("Not a FST. Maybe a wrong key?");
}
int unknownValue = Utils.SwapEndianness(BitConverter.ToInt32(fstData, 0x04));
int contentCount = Utils.SwapEndianness(BitConverter.ToInt32(fstData, 0x08));
FST result = new FST(unknownValue, contentCount);
int contentfst_offset = 0x20;
int contentfst_size = 0x20 * contentCount;
int fst_offset = contentfst_offset + contentfst_size;
int fileCount = Utils.SwapEndianness(BitConverter.ToInt32(fstData, fst_offset + 0x08));
int fst_size = fileCount * 0x10;
int nameOff = fst_offset + fst_size;
int nameSize = nameOff + 1;
// Get list with null-terminated Strings. Ends with \0\0.
for (int i = nameOff; i < fstData.Length - 1; i++)
{
if (fstData[i] == 0 && fstData[i + 1] == 0)
{
nameSize = i - nameOff;
}
}
Dictionary <int, ContentFSTInfo> contentFSTInfos = result.contentFSTInfos;
for (int i = 0; i < contentCount; i++)
{
byte[] contentFST = Arrays.copyOfRange(fstData, contentfst_offset + (i * 0x20), contentfst_offset + ((i + 1) * 0x20));
contentFSTInfos.Add(i, ContentFSTInfo.parseContentFST(contentFST));
}
byte[] fstSection = Arrays.copyOfRange(fstData, fst_offset, fst_offset + fst_size);
byte[] nameSection = Arrays.copyOfRange(fstData, nameOff, nameOff + nameSize);
FSTEntry root = result.root;
FSTService.parseFST(root, fstSection, nameSection, contentsMappedByIndex, contentFSTInfos);
return(result);
}
private static byte[] getFSTEntryAsByte(String filename, WUDPartition partition, FST fst, WUDDiscReader discReader, byte[] key)
{
FSTEntry entry = getEntryByName(fst.root, filename);
ContentFSTInfo info = fst.contentFSTInfos[((int)entry.contentFSTID)];
// Calculating the IV
ByteBuffer byteBuffer = ByteBuffer.allocate(0x10);
byteBuffer.position(0x08);
long l = entry.fileOffset >> 16;
byte[] ar = BitConverter.GetBytes(l);
byte[] IV = new byte[0x10];//= copybyteBuffer.putLong(entry.fileOffset >> 16).ToArray();
Array.ConstrainedCopy(ar, 0, IV, 0x08, 0x08);
return(discReader.readDecryptedToByteArray(Settings.WIIU_DECRYPTED_AREA_OFFSET + (long)partition.partitionOffset + (long)info.getOffset(),
entry.fileOffset, (int)entry.fileSize, key, IV));
}
public static void parseFST(FSTEntry rootEntry, byte[] fstSection, byte[] namesSection, Dictionary <int, Content> contentsByIndex,
Dictionary <int, ContentFSTInfo> contentsFSTByIndex)
{
int totalEntries = Utils.SwapEndianness(BitConverter.ToInt32(fstSection, 0x08));
int level = 0;
int[] LEntry = new int[16];
int[] Entry = new int[16];
String[] pathStrings = new String[16];
for (int i = 0; i < 16; i++)
{
pathStrings[i] = "";
}
Dictionary <int, FSTEntry> fstEntryToOffsetMap = new Dictionary <int, FSTEntry>();
Entry[level] = 0;
LEntry[level++] = 0;
fstEntryToOffsetMap.Add(0, rootEntry);
int lastlevel = level;
String path = "\\";
FSTEntry last = null;
for (int i = 1; i < totalEntries; i++)
{
int entryOffset = i;
if (level > 0)
{
while (LEntry[level - 1] == i)
{
level--;
}
}
byte[] curEntry = Arrays.copyOfRange(fstSection, i * 0x10, (i + 1) * 0x10);
FSTEntryParam entryParam = new FSTEntryParam();
if (lastlevel != level)
{
path = pathStrings[level] + getFullPath(level - 1, level, fstSection, namesSection, Entry);
lastlevel = level;
}
String filename = getName(curEntry, namesSection);
long fileOffset = Utils.SwapEndianness(BitConverter.ToInt32(curEntry, 0x04));
long fileSize = (uint)Utils.SwapEndianness(BitConverter.ToInt32(curEntry, 0x08));
short flags = Utils.SwapEndianness(BitConverter.ToInt16(curEntry, 0x0C));
short contentIndex = Utils.SwapEndianness(BitConverter.ToInt16(curEntry, 0x0E));
if ((curEntry[0] & FSTEntry.FSTEntry_notInNUS) == FSTEntry.FSTEntry_notInNUS)
{
entryParam.notInPackage = (true);
}
FSTEntry parent = null;
if ((curEntry[0] & FSTEntry.FSTEntry_DIR) == FSTEntry.FSTEntry_DIR)
{
entryParam.isDir = (true);
int parentOffset = (int)fileOffset;
int nextOffset = (int)fileSize;
parent = fstEntryToOffsetMap[parentOffset];
Entry[level] = i;
LEntry[level++] = nextOffset;
pathStrings[level] = path;
if (level > 15)
{
//MessageBox.Show("level > 15");
break;
}
}
else
{
entryParam.FileOffset = (fileOffset << 5);
entryParam.FileSize = (fileSize);
parent = fstEntryToOffsetMap[(Entry[level - 1])];
}
entryParam.Flags = (flags);
entryParam.Filename = (filename);
entryParam.Path = (path);
if (contentsByIndex != null)
{
Content content = contentsByIndex[contentIndex];
if (content == null)
{
//MessageBox.Show("Content for FST Entry not found");
}
else
{
if (content.isHashed() && (content.getDecryptedFileSize() < (fileOffset << 5)))
{ // TODO: Figure out how this works...
entryParam.FileOffset = (fileOffset);
}
entryParam.Content = (content);
ContentFSTInfo contentFSTInfo = contentsFSTByIndex[(int)contentIndex];
if (contentFSTInfo == null)
{
//MessageBox.Show("ContentFSTInfo for FST Entry not found");
}
else
{
content.contentFSTInfo = (contentFSTInfo);
}
}
}
entryParam.ContentFSTID = (contentIndex);
entryParam.Parent = (parent);
FSTEntry entry = new FSTEntry(entryParam);
last = entry;
fstEntryToOffsetMap.Add(entryOffset, entry);
}
}