Convert the NUSDataProvider class into an interfacer. All Utility functions are moved to a new DataProviderUtils class.

Changes the return values of the raw TMD/TICKET/CERT to Optionals.
Replacing some more null values with Optionals

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

@@ -17,17 +17,20 @@
 package de.mas.wiiu.jnus;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ExecutionException;
 
 import de.mas.wiiu.jnus.entities.content.Content;
 import de.mas.wiiu.jnus.implementations.NUSDataProvider;
+import de.mas.wiiu.jnus.utils.DataProviderUtils;
 import de.mas.wiiu.jnus.utils.FileUtils;
 import de.mas.wiiu.jnus.utils.Parallelizable;
 import de.mas.wiiu.jnus.utils.Utils;
@@ -68,7 +71,7 @@ public final class ExtractionService {
         Utils.createDir(outputFolder);
         NUSDataProvider dataProvider = getDataProvider();
         for (Content c : list) {
-            dataProvider.saveContentH3Hash(c, outputFolder);
+            DataProviderUtils.saveContentH3Hash(dataProvider, c, outputFolder);
         }
     }
 
@@ -87,9 +90,9 @@ public final class ExtractionService {
     public void extractEncryptedContentTo(Content content, String outputFolder, boolean withHashes) throws IOException {
         NUSDataProvider dataProvider = getDataProvider();
         if (withHashes) {
-            dataProvider.saveEncryptedContentWithH3Hash(content, outputFolder);
+            DataProviderUtils.saveEncryptedContentWithH3Hash(dataProvider, content, outputFolder);
         } else {
-            dataProvider.saveEncryptedContent(content, outputFolder);
+            DataProviderUtils.saveEncryptedContent(dataProvider, content, outputFolder);
         }
     }
 
@@ -117,12 +120,7 @@ public final class ExtractionService {
     public void extractTMDTo(String output) throws IOException {
         Utils.createDir(output);
 
-        byte[] rawTMD = getDataProvider().getRawTMD();
+        byte[] rawTMD = getDataProvider().getRawTMD().orElseThrow(() -> new FileNotFoundException("TMD not found"));
-
-        if (rawTMD == null || rawTMD.length == 0) {
-            log.info("Couldn't write TMD: No TMD loaded");
-            return;
-        }
         String tmd_path = output + File.separator + Settings.TMD_FILENAME;
         log.info("Extracting TMD to: " + tmd_path);
         FileUtils.saveByteArrayToFile(tmd_path, rawTMD);
@@ -131,29 +129,25 @@ public final class ExtractionService {
     public boolean extractTicketTo(String output) throws IOException {
         Utils.createDir(output);
 
-        byte[] rawTicket = getDataProvider().getRawTicket();
+        byte[] rawTicket = getDataProvider().getRawTicket().orElseThrow(() -> new FileNotFoundException("Ticket not found"));
 
-        if (rawTicket == null || rawTicket.length == 0) {
-            log.info("Couldn't write Ticket: No Ticket loaded");
-            return false;
-        }
         String ticket_path = output + File.separator + Settings.TICKET_FILENAME;
         log.info("Extracting Ticket to: " + ticket_path);
         return FileUtils.saveByteArrayToFile(ticket_path, rawTicket);
     }
 
-    public void extractCertTo(String output) throws IOException {
+    public boolean extractCertTo(String output) throws IOException {
         Utils.createDir(output);
 
-        byte[] rawCert = getDataProvider().getRawCert();
+        Optional<byte[]> dataOpt = getDataProvider().getRawCert();
 
-        if (rawCert == null || rawCert.length == 0) {
+        if (!dataOpt.isPresent()) {
-            log.info("Couldn't write Cert: No Cert loaded");
+            return false;
-            return;
         }
-        String cert_path = output + File.separator + Settings.CERT_FILENAME;
+
-        log.info("Extracting Cert to: " + cert_path);
+        String path = output + File.separator + Settings.CERT_FILENAME;
-        FileUtils.saveByteArrayToFile(cert_path, rawCert);
+        log.info("Extracting Cert to: " + path);
+        return FileUtils.saveByteArrayToFile(path, dataOpt.get());
     }
 
     public void extractAll(String outputFolder) throws IOException {
@@ -166,8 +160,5 @@ public final class ExtractionService {
 
     }
 
-    public byte[] getBytesFromContent(Content c, long offset, long size) throws IOException {
-        return getDataProvider().getChunkFromContent(c, offset, (int) size);
-    }
 
 }

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

@@ -40,13 +40,10 @@ abstract class NUSTitleLoader {
         NUSDataProvider dataProvider = getDataProvider(result, config);
         result.setDataProvider(dataProvider);
 
-        TMD tmd = TMD.parseTMD(dataProvider.getRawTMD());
+        byte[] tmdData = dataProvider.getRawTMD().orElseThrow(() -> new ParseException("No TMD data found", 0));
-        result.setTMD(tmd);
 
-        if (tmd == null) {
+        TMD tmd = TMD.parseTMD(tmdData);
-            log.info("TMD not found.");
+        result.setTMD(tmd);
-            throw new Exception();
-        }
 
         if (config.isNoDecryption()) {
             return result;
@@ -54,17 +51,19 @@ abstract class NUSTitleLoader {
 
         Ticket ticket = config.getTicket();
         if (ticket == null) {
-            ticket = Ticket.parseTicket(dataProvider.getRawTicket());
+            Optional<byte[]> ticketOpt = dataProvider.getRawTicket();
+            if (ticketOpt.isPresent()) {             
+                ticket = Ticket.parseTicket(ticketOpt.get(), config.getCommonKey());
+            }
+        }
+        if(ticket == null) {
+            new ParseException("Failed to get ticket data",0);
         }
         result.setTicket(ticket);
 
         Content fstContent = tmd.getContentByIndex(0);
 
-        InputStream fstContentEncryptedStream = dataProvider.getInputStreamFromContent(fstContent, 0);
+        InputStream fstContentEncryptedStream = dataProvider.getInputStreamFromContent(fstContent, 0, Optional.of(fstContent.getEncryptedFileSize()));
-        if (fstContentEncryptedStream == null) {
-            log.warning("FST is null");
-            return null;
-        }
 
         byte[] fstBytes = StreamUtils.getBytesFromStream(fstContentEncryptedStream, (int) fstContent.getEncryptedFileSize());
 

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

@@ -14,149 +14,21 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  ****************************************************************************/
+
+
 package de.mas.wiiu.jnus.implementations;
 
-import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.Arrays;
 import java.util.Optional;
 
-import de.mas.wiiu.jnus.NUSTitle;
-import de.mas.wiiu.jnus.Settings;
 import de.mas.wiiu.jnus.entities.content.Content;
-import de.mas.wiiu.jnus.utils.FileUtils;
-import de.mas.wiiu.jnus.utils.HashUtil;
 import de.mas.wiiu.jnus.utils.StreamUtils;
-import de.mas.wiiu.jnus.utils.Utils;
-import lombok.Getter;
-import lombok.NonNull;
-import lombok.extern.java.Log;
 
-@Log
+public interface NUSDataProvider {
-/**
- * Service Methods for loading NUS/Content data from different sources
- * 
- * @author Maschell
- *
- */
-public abstract class NUSDataProvider {
-    @Getter private final NUSTitle NUSTitle;
 
-    public NUSDataProvider(NUSTitle title) {
+    default public byte[] getChunkFromContent(Content content, long offset, int size) throws IOException {
-        this.NUSTitle = title;
+        return StreamUtils.getBytesFromStream(getInputStreamFromContent(content, offset, Optional.of((long) size)), size);
-    }
-
-    /**
-     * Saves the given content encrypted with his .h3 file in the given directory. The Target directory will be created if it's missing. If the content is not
-     * hashed, no .h3 will be saved
-     * 
-     * @param content
-     *            Content that should be saved
-     * @param outputFolder
-     *            Target directory where the files will be stored in.
-     * @throws IOException
-     */
-    public void saveEncryptedContentWithH3Hash(@NonNull Content content, @NonNull String outputFolder) throws IOException {
-        saveContentH3Hash(content, outputFolder);
-        saveEncryptedContent(content, outputFolder);
-    }
-
-    /**
-     * Saves the .h3 file of the given content into the given directory. The Target directory will be created if it's missing. If the content is not hashed, no
-     * .h3 will be saved
-     * 
-     * @param content
-     *            The content of which the h3 hashes should be saved
-     * @param outputFolder
-     * @return
-     * @throws IOException
-     */
-    public void saveContentH3Hash(@NonNull Content content, @NonNull String outputFolder) throws IOException {
-        if (!content.isHashed()) {
-            return;
-        }
-        String h3Filename = String.format("%08X%s", content.getID(), Settings.H3_EXTENTION);
-        File output = new File(outputFolder + File.separator + h3Filename);
-
-        if (output.exists()) {
-            if (Arrays.equals(content.getSHA2Hash(), HashUtil.hashSHA1(output))) {
-                log.info(h3Filename + " already exists");
-                return;
-            } else {
-                if (Arrays.equals(content.getSHA2Hash(), Arrays.copyOf(HashUtil.hashSHA256(output), 20))) { // 0005000c1f941200 used sha256 instead of SHA1
-                    log.info(h3Filename + " already exists");
-                    return;
-                }
-                log.warning(h3Filename + " already exists but hash is differrent than expected.");
-            }
-        }
-
-        byte[] hash = getContentH3Hash(content);
-        if (hash == null || hash.length == 0) {
-            return;
-        }
-
-        log.warning("Saving " + h3Filename + " ");
-
-        FileUtils.saveByteArrayToFile(output, hash);
-
-    }
-
-    /**
-     * Saves the given content encrypted in the given directory. The Target directory will be created if it's missing. If the content is not encrypted at all,
-     * it will be just saved anyway.
-     * 
-     * @param content
-     *            Content that should be saved
-     * @param outputFolder
-     *            Target directory where the files will be stored in.
-     * @return
-     * @throws IOException
-     */
-    public void saveEncryptedContent(@NonNull Content content, @NonNull String outputFolder) throws IOException {
-        int maxTries = 3;
-        int i = 0;
-        while (i < maxTries) {
-            File output = new File(outputFolder + File.separator + content.getFilename());
-            if (output.exists()) {
-                if (output.length() == content.getEncryptedFileSizeAligned()) {
-                    log.info(content.getFilename() + "Encrypted content alreadys exists, skipped");
-                    return;
-                } else {
-                    log.warning(content.getFilename() + " Encrypted content alreadys exists, but the length is not as expected. Saving it again. "
-                            + output.length() + " " + content.getEncryptedFileSizeAligned() + " Difference: "
-                            + (output.length() - content.getEncryptedFileSizeAligned()));
-                }
-            }
-
-            Utils.createDir(outputFolder);
-            InputStream inputStream = getInputStreamFromContent(content, 0);
-            if (inputStream == null) {
-                log.info(content.getFilename() + " Couldn't save encrypted content. Input stream was null");
-                return;
-            }
-            log.warning("loading " + content.getFilename());
-            FileUtils.saveInputStreamToFile(output, inputStream, content.getEncryptedFileSizeAligned());
-
-            File outputNow = new File(outputFolder + File.separator + content.getFilename());
-            if (outputNow.exists()) {
-                if (outputNow.length() != content.getEncryptedFileSizeAligned()) {
-                    log.warning(content.getFilename() + " Encrypted content length is not as expected. Saving it again. Loaded: " + outputNow.length()
-                            + " Expected: " + content.getEncryptedFileSizeAligned() + " Difference: "
-                            + (outputNow.length() - content.getEncryptedFileSizeAligned()));
-                    i++;
-                    continue;
-                } else {
-                    break;
-                }
-            }
-        }
-
-    }
-
-    public byte[] getChunkFromContent(Content content, long offset, int size) throws IOException {
-        return StreamUtils.getBytesFromStream(getInputStreamFromContent(content, offset, Optional.of((long)size)), size);
     }
 
     /**
@@ -168,19 +40,18 @@ public abstract class NUSDataProvider {
      */
     public abstract InputStream getInputStreamFromContent(Content content, long offset, Optional<Long> size) throws IOException;
 
-    public InputStream getInputStreamFromContent(Content content, long offset) throws IOException {
+    default public InputStream getInputStreamFromContent(Content content, long offset) throws IOException {
         return getInputStreamFromContent(content, offset, Optional.empty());
     }
 
-    // TODO: JavaDocs
+    public abstract Optional<byte[]> getContentH3Hash(Content content) throws IOException;
-    public abstract byte[] getContentH3Hash(Content content) throws IOException;
 
-    public abstract byte[] getRawTMD() throws IOException;
+    public abstract Optional<byte[]> getRawTMD() throws IOException;
 
-    public abstract byte[] getRawTicket() throws IOException;
+    public abstract Optional<byte[]> getRawTicket() throws IOException;
 
-    public abstract byte[] getRawCert() throws IOException;
+    public abstract Optional<byte[]> getRawCert() throws IOException;
 
     public abstract void cleanup() throws IOException;
 
-}
+}

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

@@ -33,11 +33,10 @@ import lombok.Getter;
 import lombok.extern.java.Log;
 
 @Log
-public final class NUSDataProviderLocal extends NUSDataProvider {
+public final class NUSDataProviderLocal implements NUSDataProvider {
     @Getter private final String localPath;
 
-    public NUSDataProviderLocal(NUSTitle nustitle, String localPath) {
+    public NUSDataProviderLocal(String localPath) {
-        super(nustitle);
         this.localPath = localPath;
     }
 
@@ -59,48 +58,48 @@ public final class NUSDataProviderLocal extends NUSDataProvider {
     }
 
     @Override
-    public byte[] getContentH3Hash(Content content) throws IOException {
+    public Optional<byte[]> getContentH3Hash(Content content) throws IOException {
         String h3Filename = String.format("%08X%s", content.getID(), Settings.H3_EXTENTION);
         File filepath = FileUtils.getFileIgnoringFilenameCases(getLocalPath(), h3Filename);
         if (filepath == null || !filepath.exists()) {
             String errormsg = "Couldn't open \"" + getLocalPath() + File.separator + h3Filename + "\", file does not exist";
             log.warning(errormsg);
-            return new byte[0];
+            throw new FileNotFoundException(errormsg);
         }
-        return Files.readAllBytes(filepath.toPath());
+        return Optional.of(Files.readAllBytes(filepath.toPath()));
     }
 
     @Override
-    public byte[] getRawTMD() throws IOException {
+    public Optional<byte[]> getRawTMD() throws IOException {
         File file = FileUtils.getFileIgnoringFilenameCases(getLocalPath(), Settings.TMD_FILENAME);
         if (file == null || !file.exists()) {
             String errormsg = "Couldn't open \"" + getLocalPath() + File.separator + Settings.TMD_FILENAME + "\", file does not exist";
             log.warning(errormsg);
             throw new FileNotFoundException(errormsg);
         }
-        return Files.readAllBytes(file.toPath());
+        return Optional.of(Files.readAllBytes(file.toPath()));
     }
 
     @Override
-    public byte[] getRawTicket() throws IOException {
+    public Optional<byte[]> getRawTicket() throws IOException {
         File file = FileUtils.getFileIgnoringFilenameCases(getLocalPath(), Settings.TICKET_FILENAME);
         if (file == null || !file.exists()) {
             String errormsg = "Couldn't open \"" + getLocalPath() + File.separator + Settings.TICKET_FILENAME + "\", file does not exist";
             log.warning(errormsg);
             throw new FileNotFoundException(errormsg);
         }
-        return Files.readAllBytes(file.toPath());
+        return Optional.of(Files.readAllBytes(file.toPath()));
     }
 
     @Override
-    public byte[] getRawCert() throws IOException {
+    public Optional<byte[]> getRawCert() throws IOException {
         File file = FileUtils.getFileIgnoringFilenameCases(getLocalPath(), Settings.CERT_FILENAME);
         if (file == null || !file.exists()) {
             String errormsg = "Couldn't open \"" + getLocalPath() + File.separator + Settings.CERT_FILENAME + "\", file does not exist";
             log.warning(errormsg);
             throw new FileNotFoundException(errormsg);
         }
-        return Files.readAllBytes(file.toPath());
+        return Optional.of(Files.readAllBytes(file.toPath()));
     }
 
     @Override

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

@@ -2,28 +2,26 @@ package de.mas.wiiu.jnus.implementations;
 
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
 import java.util.Optional;
 
-import de.mas.wiiu.jnus.NUSTitle;
 import de.mas.wiiu.jnus.Settings;
 import de.mas.wiiu.jnus.entities.content.Content;
-import de.mas.wiiu.jnus.implementations.NUSDataProvider;
 import de.mas.wiiu.jnus.utils.StreamUtils;
 import lombok.Getter;
 
-public class NUSDataProviderLocalBackup extends NUSDataProvider {
+public class NUSDataProviderLocalBackup implements NUSDataProvider {
     @Getter private final String localPath;
     private final short titleVersion;
 
-    public NUSDataProviderLocalBackup(NUSTitle nustitle, String localPath) {
+    public NUSDataProviderLocalBackup(String localPath) {
-        this(nustitle, localPath, (short) Settings.LATEST_TMD_VERSION);
+        this(localPath, (short) Settings.LATEST_TMD_VERSION);
     }
 
-    public NUSDataProviderLocalBackup(NUSTitle nustitle, String localPath, short version) {
+    public NUSDataProviderLocalBackup(String localPath, short version) {
-        super(nustitle);
         this.localPath = localPath;
         this.titleVersion = version;
     }
@@ -36,7 +34,7 @@ public class NUSDataProviderLocalBackup extends NUSDataProvider {
     public InputStream getInputStreamFromContent(Content content, long offset, Optional<Long> size) throws IOException {
         File filepath = new File(getFilePathOnDisk(content));
         if (!filepath.exists()) {
-            return null;
+            throw new FileNotFoundException(filepath.getAbsolutePath() + " was not found.");
         }
         InputStream in = new FileInputStream(filepath);
         StreamUtils.skipExactly(in, offset);
@@ -44,40 +42,38 @@ public class NUSDataProviderLocalBackup extends NUSDataProvider {
     }
 
     @Override
-    public byte[] getContentH3Hash(Content content) throws IOException {
+    public Optional<byte[]> getContentH3Hash(Content content) throws IOException {
         String h3Path = getLocalPath() + File.separator + String.format("%08X.h3", content.getID());
         File h3File = new File(h3Path);
-        if (!h3File.exists()) {
+
-            return new byte[0];
+        return Optional.of(Files.readAllBytes(h3File.toPath()));
-        }
-        return Files.readAllBytes(h3File.toPath());
     }
 
     @Override
-    public byte[] getRawTMD() throws IOException {
+    public Optional<byte[]> getRawTMD() throws IOException {
         String inputPath = getLocalPath();
         String tmdPath = inputPath + File.separator + Settings.TMD_FILENAME;
-        if (titleVersion != Settings.LATEST_TMD_VERSION) {
+        if (titleVersion != Settings.LATEST_TMD_VERSION) {  
             tmdPath = inputPath + File.separator + "v" + titleVersion + File.separator + Settings.TMD_FILENAME;
         }
         File tmdFile = new File(tmdPath);
-        return Files.readAllBytes(tmdFile.toPath());
+        return Optional.of(Files.readAllBytes(tmdFile.toPath()));
     }
 
     @Override
-    public byte[] getRawTicket() throws IOException {
+    public Optional<byte[]> getRawTicket() throws IOException {
         String inputPath = getLocalPath();
         String ticketPath = inputPath + File.separator + Settings.TICKET_FILENAME;
         File ticketFile = new File(ticketPath);
-        return Files.readAllBytes(ticketFile.toPath());
+        return Optional.of(Files.readAllBytes(ticketFile.toPath()));
     }
 
     @Override
-    public byte[] getRawCert() throws IOException {
+    public Optional<byte[]> getRawCert() throws IOException {
         String inputPath = getLocalPath();
         String certPath = inputPath + File.separator + Settings.CERT_FILENAME;
         File certFile = new File(certPath);
-        return Files.readAllBytes(certFile.toPath());
+        return Optional.of(Files.readAllBytes(certFile.toPath()));
     }
 
     @Override

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

@@ -16,25 +16,21 @@
  ****************************************************************************/
 package de.mas.wiiu.jnus.implementations;
 
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Optional;
 
-import de.mas.wiiu.jnus.NUSTitle;
 import de.mas.wiiu.jnus.Settings;
-import de.mas.wiiu.jnus.entities.TMD;
 import de.mas.wiiu.jnus.entities.content.Content;
 import de.mas.wiiu.jnus.utils.Parallelizable;
 import de.mas.wiiu.jnus.utils.download.NUSDownloadService;
 import lombok.Getter;
 
-public class NUSDataProviderRemote extends NUSDataProvider implements Parallelizable {
+public class NUSDataProviderRemote implements NUSDataProvider, Parallelizable {
     @Getter private final int version;
     @Getter private final long titleID;
 
-    public NUSDataProviderRemote(NUSTitle title, int version, long titleID) {
+    public NUSDataProviderRemote(int version, long titleID) {
-        super(title);
         this.version = version;
         this.titleID = titleID;
     }
@@ -46,53 +42,49 @@ public class NUSDataProviderRemote extends NUSDataProvider implements Paralleliz
     }
 
     private String getRemoteURL(Content content) {
-        return String.format("%016x/%08X", getNUSTitle().getTMD().getTitleID(), content.getID());
+        return String.format("%016x/%08X", titleID, content.getID());
     }
 
     @Override
-    public byte[] getContentH3Hash(Content content) throws IOException {
+    public Optional<byte[]> getContentH3Hash(Content content) throws IOException {
         NUSDownloadService downloadService = NUSDownloadService.getDefaultInstance();
         String url = getRemoteURL(content) + Settings.H3_EXTENTION;
-        return downloadService.downloadToByteArray(url);
+
+        byte[] res = downloadService.downloadToByteArray(url);
+        if (res == null || res.length == 0) {
+            return Optional.empty();
+        }
+        return Optional.of(res);
     }
 
     @Override
-    public byte[] getRawTMD() throws IOException {
+    public Optional<byte[]> getRawTMD() throws IOException {
         NUSDownloadService downloadService = NUSDownloadService.getDefaultInstance();
 
         long titleID = getTitleID();
         int version = getVersion();
 
-        return downloadService.downloadTMDToByteArray(titleID, version);
+        byte[] res = downloadService.downloadTMDToByteArray(titleID, version);
-    }
 
-    @Override
+        if (res == null || res.length == 0) {
-    public byte[] getRawTicket() throws IOException {
+            return Optional.empty();
-        NUSDownloadService downloadService = NUSDownloadService.getDefaultInstance();
-
-        long titleID = getNUSTitle().getTMD().getTitleID();
-
-        return downloadService.downloadTicketToByteArray(titleID);
-    }
-
-    @Override
-    public byte[] getRawCert() throws IOException {
-        NUSDownloadService downloadService = NUSDownloadService.getDefaultInstance();
-        byte[] defaultCert = downloadService.downloadDefaultCertToByteArray();
-
-        TMD tmd = getNUSTitle().getTMD();
-        byte[] result = new byte[0];
-        try {
-            ByteArrayOutputStream fos = new ByteArrayOutputStream();
-            fos.write(tmd.getCert1());
-            fos.write(tmd.getCert2());
-            fos.write(defaultCert);
-            result = fos.toByteArray();
-            fos.close();
-        } catch (Exception e) {
-            e.printStackTrace();
         }
-        return result;
+        return Optional.of(res);
+    }
+
+    @Override
+    public Optional<byte[]> getRawTicket() throws IOException {
+        NUSDownloadService downloadService = NUSDownloadService.getDefaultInstance();
+        byte[] res = downloadService.downloadTicketToByteArray(titleID);
+        if (res == null || res.length == 0) {
+            return Optional.empty();
+        }
+        return Optional.of(res);
+    }
+
+    @Override
+    public Optional<byte[]> getRawCert() throws IOException {
+        return Optional.empty();
     }
 
     @Override

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

@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (C) 2016-2018 Maschell
+ * Copyright (C) 2016-2019 Maschell
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,9 +20,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.Optional;
 
-import de.mas.wiiu.jnus.NUSTitle;
-import de.mas.wiiu.jnus.Settings;
-import de.mas.wiiu.jnus.entities.TMD;
 import de.mas.wiiu.jnus.entities.content.Content;
 import de.mas.wiiu.jnus.implementations.wud.parser.WUDGamePartition;
 import de.mas.wiiu.jnus.implementations.wud.parser.WUDPartitionHeader;
@@ -31,29 +28,20 @@ import lombok.Getter;
 import lombok.extern.java.Log;
 
 @Log
-public class NUSDataProviderWUD extends NUSDataProvider {
+public class NUSDataProviderWUD implements NUSDataProvider {
     @Getter private final WUDGamePartition gamePartition;
     @Getter private final WUDDiscReader discReader;
 
-    private final TMD tmd;
+    public NUSDataProviderWUD(WUDGamePartition gamePartition, WUDDiscReader discReader) {
-
-    public NUSDataProviderWUD(NUSTitle title, WUDGamePartition gamePartition, WUDDiscReader discReader) {
-        super(title);
         this.gamePartition = gamePartition;
         this.discReader = discReader;
-        this.tmd = TMD.parseTMD(getRawTMD());
     }
 
     public long getOffsetInWUD(Content content) {
-        if (content.getContentFSTInfo() == null) {
+        if (content.getIndex() == 0) { // Index 0 is the FST which is at the beginning of the partion;
-            return getAbsoluteReadOffset();
+            return getGamePartition().getAbsolutePartitionOffset();
-        } else {
-            return getAbsoluteReadOffset() + content.getContentFSTInfo().getOffset();
         }
-    }
+        return getGamePartition().getAbsolutePartitionOffset() + content.getContentFSTInfo().getOffset();
-
-    public long getAbsoluteReadOffset() {
-        return (long) Settings.WIIU_DECRYPTED_AREA_OFFSET + getGamePartition().getPartitionOffset();
     }
 
     @Override
@@ -66,45 +54,34 @@ public class NUSDataProviderWUD extends NUSDataProvider {
         WUDDiscReader discReader = getDiscReader();
         long offset = getOffsetInWUD(content) + fileOffsetBlock;
         long usedSize = content.getEncryptedFileSize() - fileOffsetBlock;
-        if(size.isPresent()) {
+        if (size.isPresent()) {
             usedSize = size.get();
         }
         return discReader.readEncryptedToInputStream(offset, usedSize);
     }
 
     @Override
-    public byte[] getContentH3Hash(Content content) throws IOException {
+    public Optional<byte[]> getContentH3Hash(Content content) throws IOException {
-
-        if (getGamePartitionHeader() == null) {
-            log.warning("GamePartitionHeader is null");
-            return null;
-        }
-
         if (!getGamePartitionHeader().isCalculatedHashes()) {
             log.info("Calculating h3 hashes");
-            getGamePartitionHeader().calculateHashes(getTMD().getAllContents());
+            getGamePartitionHeader().calculateHashes(getGamePartition().getTmd().getAllContents());
-
         }
         return getGamePartitionHeader().getH3Hash(content);
     }
 
-    public TMD getTMD() {
+    @Override
-        return tmd;
+    public Optional<byte[]> getRawTMD() {
+        return Optional.of(getGamePartition().getRawTMD());
     }
 
     @Override
-    public byte[] getRawTMD() {
+    public Optional<byte[]> getRawTicket() {
-        return getGamePartition().getRawTMD();
+        return Optional.of(getGamePartition().getRawTicket());
     }
 
     @Override
-    public byte[] getRawTicket() {
+    public Optional<byte[]> getRawCert() throws IOException {
-        return getGamePartition().getRawTicket();
+        return Optional.of(getGamePartition().getRawCert());
-    }
-
-    @Override
-    public byte[] getRawCert() throws IOException {
-        return getGamePartition().getRawCert();
     }
 
     public WUDPartitionHeader getGamePartitionHeader() {

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

@@ -35,12 +35,11 @@ import lombok.Setter;
 import lombok.extern.java.Log;
 
 @Log
-public class NUSDataProviderWoomy extends NUSDataProvider {
+public class NUSDataProviderWoomy implements NUSDataProvider {
     @Getter private final WoomyInfo woomyInfo;
     @Setter(AccessLevel.PRIVATE) private WoomyZipFile woomyZipFile;
 
-    public NUSDataProviderWoomy(NUSTitle title, WoomyInfo woomyInfo) {
+    public NUSDataProviderWoomy(WoomyInfo woomyInfo) {
-        super(title);
         this.woomyInfo = woomyInfo;
     }
 
@@ -56,19 +55,19 @@ public class NUSDataProviderWoomy extends NUSDataProvider {
     }
 
     @Override
-    public byte[] getContentH3Hash(Content content) throws IOException {
+    public Optional<byte[]> getContentH3Hash(Content content) throws IOException {
         ZipEntry entry = getWoomyInfo().getContentFiles().get(content.getFilename().toLowerCase());
         if (entry != null) {
             WoomyZipFile zipFile = getNewWoomyZipFile();
             byte[] result = zipFile.getEntryAsByte(entry);
             zipFile.close();
-            return result;
+            return Optional.of(result);
         }
-        return new byte[0];
+        return Optional.empty();
     }
 
     @Override
-    public byte[] getRawTMD() throws IOException {
+    public Optional<byte[]> getRawTMD() throws IOException {
         ZipEntry entry = getWoomyInfo().getContentFiles().get(Settings.TMD_FILENAME);
         if (entry == null) {
             log.warning(Settings.TMD_FILENAME + " not found in woomy file");
@@ -77,11 +76,11 @@ public class NUSDataProviderWoomy extends NUSDataProvider {
         WoomyZipFile zipFile = getNewWoomyZipFile();
         byte[] result = zipFile.getEntryAsByte(entry);
         zipFile.close();
-        return result;
+        return Optional.of(result);
     }
 
     @Override
-    public byte[] getRawTicket() throws IOException {
+    public Optional<byte[]> getRawTicket() throws IOException {
         ZipEntry entry = getWoomyInfo().getContentFiles().get(Settings.TICKET_FILENAME);
         if (entry == null) {
             log.warning(Settings.TICKET_FILENAME + " not found in woomy file");
@@ -91,7 +90,7 @@ public class NUSDataProviderWoomy extends NUSDataProvider {
         WoomyZipFile zipFile = getNewWoomyZipFile();
         byte[] result = zipFile.getEntryAsByte(entry);
         zipFile.close();
-        return result;
+        return Optional.of(result);
     }
 
     public WoomyZipFile getSharedWoomyZipFile() throws ZipException, IOException {
@@ -113,7 +112,7 @@ public class NUSDataProviderWoomy extends NUSDataProvider {
     }
 
     @Override
-    public byte[] getRawCert() throws IOException {
+    public Optional<byte[]> getRawCert() throws IOException {
-        return new byte[0];
+        return Optional.empty();
     }
 }

src/de/mas/wiiu/jnus/implementations/wud/parser/WUDGamePartition.java

@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (C) 2016-2018 Maschell
+ * Copyright (C) 2016-2019 Maschell
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,20 +16,25 @@
  ****************************************************************************/
 package de.mas.wiiu.jnus.implementations.wud.parser;
 
+import java.text.ParseException;
+
+import de.mas.wiiu.jnus.entities.TMD;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class WUDGamePartition extends WUDPartition {
+    private final TMD tmd;
     private final byte[] rawTMD;
     private final byte[] rawCert;
     private final byte[] rawTicket;
 
-    public WUDGamePartition(String partitionName, long partitionOffset, byte[] rawTMD, byte[] rawCert, byte[] rawTicket) {
+    public WUDGamePartition(String partitionName, long partitionOffset, byte[] rawTMD, byte[] rawCert, byte[] rawTicket) throws ParseException {
         super(partitionName, partitionOffset);
         this.rawTMD = rawTMD;
+        this.tmd = TMD.parseTMD(rawTMD);
         this.rawCert = rawCert;
         this.rawTicket = rawTicket;
     }
-}
+}

src/de/mas/wiiu/jnus/implementations/wud/parser/WUDPartitionHeader.java

@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (C) 2016-2018 Maschell
+ * Copyright (C) 2016-2019 Maschell
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,10 +19,10 @@ package de.mas.wiiu.jnus.implementations.wud.parser;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
 import de.mas.wiiu.jnus.entities.content.Content;
 import de.mas.wiiu.jnus.utils.ByteUtils;
@@ -52,13 +52,13 @@ public final class WUDPartitionHeader {
         getH3Hashes().put(index, hash);
     }
 
-    public byte[] getH3Hash(Content content) {
+    public Optional<byte[]> getH3Hash(Content content) {
         if (content == null) {
             log.info("Can't find h3 hash, given content is null.");
-            return null;
+            return Optional.empty();
         }
 
-        return getH3Hashes().get(content.getIndex());
+        return Optional.of(getH3Hashes().get(content.getIndex()));
     }
 
     public void calculateHashes(Map<Integer, Content> allContents) {

src/de/mas/wiiu/jnus/utils/DataProviderUtils.java

@@ -0,0 +1,152 @@
+/****************************************************************************
+ * Copyright (C) 2016-2018 Maschell
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ ****************************************************************************/
+package de.mas.wiiu.jnus.utils;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Optional;
+
+import de.mas.wiiu.jnus.Settings;
+import de.mas.wiiu.jnus.entities.content.Content;
+import de.mas.wiiu.jnus.implementations.NUSDataProvider;
+import lombok.NonNull;
+import lombok.extern.java.Log;
+
+@Log
+/**
+ * Service Methods for loading NUS/Content data from different sources
+ * 
+ * @author Maschell
+ *
+ */
+public class DataProviderUtils {
+
+    private DataProviderUtils() {
+
+    }
+
+    /**
+     * Saves the given content encrypted with his .h3 file in the given directory. The Target directory will be created if it's missing. If the content is not
+     * hashed, no .h3 will be saved
+     * 
+     * @param content
+     *            Content that should be saved
+     * @param outputFolder
+     *            Target directory where the files will be stored in.
+     * @throws IOException
+     */
+    public static void saveEncryptedContentWithH3Hash(@NonNull NUSDataProvider dataProvider, @NonNull Content content, @NonNull String outputFolder)
+            throws IOException {
+        saveContentH3Hash(dataProvider, content, outputFolder);
+        saveEncryptedContent(dataProvider, content, outputFolder);
+    }
+
+    /**
+     * Saves the .h3 file of the given content into the given directory. The Target directory will be created if it's missing. If the content is not hashed, no
+     * .h3 will be saved
+     * 
+     * @param content
+     *            The content of which the h3 hashes should be saved
+     * @param outputFolder
+     * @return
+     * @throws IOException
+     */
+    public static boolean saveContentH3Hash(@NonNull NUSDataProvider dataProvider, @NonNull Content content, @NonNull String outputFolder) throws IOException {
+        if (!content.isHashed()) {
+            return false;
+        }
+        String h3Filename = String.format("%08X%s", content.getID(), Settings.H3_EXTENTION);
+        File output = new File(outputFolder + File.separator + h3Filename);
+
+        if (output.exists()) {
+            if (Arrays.equals(content.getSHA2Hash(), HashUtil.hashSHA1(output))) {
+                log.info(h3Filename + " already exists");
+                return false;
+            } else {
+                if (Arrays.equals(content.getSHA2Hash(), Arrays.copyOf(HashUtil.hashSHA256(output), 20))) { // 0005000c1f941200 used sha256 instead of SHA1
+                    log.info(h3Filename + " already exists");
+                    return false;
+                }
+                log.warning(h3Filename + " already exists but hash is differrent than expected.");
+            }
+        }
+
+        Optional<byte[]> hashOpt = dataProvider.getContentH3Hash(content);
+        if (!hashOpt.isPresent()) {
+            return false;
+        }
+        byte[] hash = hashOpt.get();
+
+        log.warning("Saving " + h3Filename + " ");
+
+        return FileUtils.saveByteArrayToFile(output, hash);
+
+    }
+
+    /**
+     * Saves the given content encrypted in the given directory. The Target directory will be created if it's missing. If the content is not encrypted at all,
+     * it will be just saved anyway.
+     * 
+     * @param content
+     *            Content that should be saved
+     * @param outputFolder
+     *            Target directory where the files will be stored in.
+     * @return
+     * @throws IOException
+     */
+    public static void saveEncryptedContent(@NonNull NUSDataProvider dataProvider, @NonNull Content content, @NonNull String outputFolder) throws IOException {
+        int maxTries = 3;
+        int i = 0;
+        while (i < maxTries) {
+            File output = new File(outputFolder + File.separator + content.getFilename());
+            if (output.exists()) {
+                if (output.length() == content.getEncryptedFileSizeAligned()) {
+                    log.info(content.getFilename() + "Encrypted content alreadys exists, skipped");
+                    return;
+                } else {
+                    log.warning(content.getFilename() + " Encrypted content alreadys exists, but the length is not as expected. Saving it again. "
+                            + output.length() + " " + content.getEncryptedFileSizeAligned() + " Difference: "
+                            + (output.length() - content.getEncryptedFileSizeAligned()));
+                }
+            }
+
+            Utils.createDir(outputFolder);
+            InputStream inputStream = dataProvider.getInputStreamFromContent(content, 0);
+            if (inputStream == null) {
+                log.info(content.getFilename() + " Couldn't save encrypted content. Input stream was null");
+                return;
+            }
+            log.warning("loading " + content.getFilename());
+            FileUtils.saveInputStreamToFile(output, inputStream, content.getEncryptedFileSizeAligned());
+
+            File outputNow = new File(outputFolder + File.separator + content.getFilename());
+            if (outputNow.exists()) {
+                if (outputNow.length() != content.getEncryptedFileSizeAligned()) {
+                    log.warning(content.getFilename() + " Encrypted content length is not as expected. Saving it again. Loaded: " + outputNow.length()
+                            + " Expected: " + content.getEncryptedFileSizeAligned() + " Difference: "
+                            + (outputNow.length() - content.getEncryptedFileSizeAligned()));
+                    i++;
+                    continue;
+                } else {
+                    break;
+                }
+            }
+        }
+    }
+}