Add support for titles without FST.

src/de/mas/wiiu/jnus/NUSTitleLoader.java

@@ -27,6 +27,9 @@ import de.mas.wiiu.jnus.entities.TMD;
 import de.mas.wiiu.jnus.entities.Ticket;
 import de.mas.wiiu.jnus.entities.content.Content;
 import de.mas.wiiu.jnus.entities.fst.FST;
+import de.mas.wiiu.jnus.entities.fst.FSTEntry;
+import de.mas.wiiu.jnus.implementations.FSTDataProviderNUSTitle;
+import de.mas.wiiu.jnus.interfaces.FSTDataProvider;
 import de.mas.wiiu.jnus.interfaces.NUSDataProvider;
 import de.mas.wiiu.jnus.utils.StreamUtils;
 import de.mas.wiiu.jnus.utils.cryptography.AESDecryption;
@@ -63,12 +66,22 @@ public class NUSTitleLoader {
         }
         result.setTicket(ticket);
 
+        // If we have just content, we don't have a FST.
+        if (tmd.getAllContents().size() == 1) { 
+            // The only way to check if the key is right, is by trying to decrypt the whole thing.
+            FSTDataProvider dp = new FSTDataProviderNUSTitle(result);
+            for (FSTEntry children : dp.getRoot().getChildren()) {
+                dp.readFile(children);
+            }
+            return result;
+        }
+        // If we have more than one content, the index 0 is the FST.
         Content fstContent = tmd.getContentByIndex(0);
 
         InputStream fstContentEncryptedStream = dataProvider.getInputStreamFromContent(fstContent, 0, Optional.of(fstContent.getEncryptedFileSize()));
 
         byte[] fstBytes = StreamUtils.getBytesFromStream(fstContentEncryptedStream, (int) fstContent.getEncryptedFileSize());
-        
+
         if (fstContent.isEncrypted()) {
             AESDecryption aesDecryption = new AESDecryption(ticket.getDecryptedKey(), new byte[0x10]);
             if (fstBytes.length % 0x10 != 0) {

src/de/mas/wiiu/jnus/entities/fst/FSTEntry.java

@@ -88,6 +88,16 @@ public class FSTEntry {
         param.setDir(true);
         return new FSTEntry(param);
     }
+    
+    public static FSTEntry createFSTEntry(FSTEntry parent, String filename, Content content) {
+        FSTEntryParam param = new FSTEntryParam();
+        param.setFileNameSupplier(() -> filename);
+        param.setFileSize(content.getDecryptedFileSize());
+        param.setContent(content);
+        param.setDir(false);
+        param.setParent(parent);
+        return new FSTEntry(param);
+    }
 
     public String getFilename() {
         if (filename == null) {

src/de/mas/wiiu/jnus/implementations/FSTDataProviderNUSTitle.java

@@ -21,9 +21,11 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 import de.mas.wiiu.jnus.NUSTitle;
 import de.mas.wiiu.jnus.entities.content.Content;
+import de.mas.wiiu.jnus.entities.fst.FST;
 import de.mas.wiiu.jnus.entities.fst.FSTEntry;
 import de.mas.wiiu.jnus.interfaces.FSTDataProvider;
 import de.mas.wiiu.jnus.interfaces.HasNUSTitle;
@@ -38,16 +40,30 @@ import lombok.extern.java.Log;
 @Log
 public class FSTDataProviderNUSTitle implements FSTDataProvider, HasNUSTitle {
     private final NUSTitle title;
+    private final FSTEntry rootEntry;
     @Getter @Setter private String name;
 
     public FSTDataProviderNUSTitle(NUSTitle title) {
         this.title = title;
         this.name = String.format("%016X", title.getTMD().getTitleID());
+
+        FST fst = title.getFST();
+        if (fst != null) {
+            rootEntry = title.getFST().getRoot();
+        } else if (title.getTMD().getContentCount() == 1) {
+            // If the tmd has only one content file, it has not FST. We have to create our own FST.
+            Content c = title.getTMD().getAllContents().values().stream().collect(Collectors.toList()).get(0);
+            FSTEntry root = FSTEntry.getRootFSTEntry();
+            FSTEntry.createFSTEntry(root, "data.bin", c); // Will add this title root.
+            rootEntry = root;
+        } else {
+            rootEntry = null;
+        }
     }
 
     @Override
     public FSTEntry getRoot() {
-        return title.getFST().getRoot();
+        return rootEntry;
     }
 
     @Override