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Add a new DecryptionService using a FSTDataProvider.

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Maschell 2019-04-11 13:29:08 +02:00
parent 40f6b2af73
commit 2f820bbe17
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src/de/mas/wiiu/jnus/DecryptionService.java Normal file
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/****************************************************************************
* 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
* 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;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
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.entities.fst.FSTEntry;
import de.mas.wiiu.jnus.interfaces.FSTDataProvider;
import de.mas.wiiu.jnus.utils.CheckSumWrongException;
import de.mas.wiiu.jnus.utils.FSTUtils;
import de.mas.wiiu.jnus.utils.FileUtils;
import de.mas.wiiu.jnus.utils.HashUtil;
import de.mas.wiiu.jnus.utils.Utils;
import lombok.val;
import lombok.extern.java.Log;
@Log
public final class DecryptionService {
private final FSTDataProvider dataProvider;
private boolean parallelizable = false;
public static DecryptionService getInstance(FSTDataProvider dataProvider) {
return new DecryptionService(dataProvider);
}
private DecryptionService(FSTDataProvider dataProvider) {
// if (dataProvider instanceof Parallelizable) {
// parallelizable = true;
// }
this.dataProvider = dataProvider;
}
public void decryptFSTEntryTo(boolean useFullPath, FSTEntry entry, String outputPath, boolean skipExistingFile) {
try {
decryptFSTEntryToAsync(useFullPath, entry, outputPath, skipExistingFile).get();
} catch (InterruptedException | ExecutionException e) {
throw new RuntimeException(e);
}
}
public CompletableFuture<Void> decryptFSTEntryToAsync(boolean useFullPath, FSTEntry entry, String outputPath, boolean skipExistingFile) {
return CompletableFuture.runAsync(() -> {
try {
if (entry.isNotInPackage() || entry.getContent() == null) {
return;
}
log.info("Decrypting " + entry.getFilename());
String targetFilePath = new StringBuilder().append(outputPath).append("/").append(entry.getFilename()).toString();
String fullPath = new StringBuilder().append(outputPath).toString();
if (useFullPath) {
targetFilePath = new StringBuilder().append(outputPath).append(entry.getFullPath()).toString();
fullPath = new StringBuilder().append(outputPath).append(entry.getPath()).toString();
if (entry.isDir()) { // If the entry is a directory. Create it and return.
Utils.createDir(targetFilePath);
return;
}
} else if (entry.isDir()) {
return;
}
if (!Utils.createDir(fullPath)) {
return;
}
File target = new File(targetFilePath);
if (skipExistingFile) {
File targetFile = new File(targetFilePath);
if (targetFile.exists()) {
if (entry.isDir()) {
return;
}
if (targetFile.length() == entry.getFileSize()) {
Content c = entry.getContent();
if (c.isHashed()) {
log.info("File already exists: " + entry.getFilename());
return;
} else {
if (Arrays.equals(HashUtil.hashSHA1(target, (int) c.getDecryptedFileSize()), c.getSHA2Hash())) {
log.info("File already exists: " + entry.getFilename());
return;
} else {
log.info("File already exists with the same filesize, but the hash doesn't match: " + entry.getFilename());
}
}
} else {
log.info("File already exists but the filesize doesn't match: " + entry.getFilename());
}
}
}
// to avoid having fragmented files.
FileUtils.FileAsOutputStreamWrapper(new File(targetFilePath), entry.getFileSize(),
newOutputStream -> decryptFSTEntryToStream(entry, newOutputStream));
} catch (Exception ex) {
throw new CompletionException(ex);
}
});
}
public void decryptFSTEntryToStream(FSTEntry entry, OutputStream outputStream) throws IOException {
dataProvider.readFileToStream(outputStream, entry, 0);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// Decrypt FSTEntry to OutputStream
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
public void decryptFSTEntryTo(String entryFullPath, OutputStream outputStream) throws IOException, CheckSumWrongException {
FSTEntry entry = FSTUtils.getFSTEntryByFullPath(dataProvider.getRoot(), entryFullPath)
.orElseThrow(() -> new FileNotFoundException("File not found: " + entryFullPath));
decryptFSTEntryToStream(entry, outputStream);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// Decrypt single FSTEntry to File
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
public void decryptFSTEntryTo(boolean fullPath, String entryFullPath, String outputFolder, boolean skipExistingFiles)
throws IOException, CheckSumWrongException {
FSTEntry entry = FSTUtils.getFSTEntryByFullPath(dataProvider.getRoot(), entryFullPath)
.orElseThrow(() -> new FileNotFoundException("File not found: " + entryFullPath));
decryptFSTEntryTo(fullPath, entry, outputFolder, skipExistingFiles);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// Decrypt list of FSTEntry to Files
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
public void decryptAllFSTEntriesTo(String outputFolder, boolean skipExisting) throws IOException, CheckSumWrongException {
Utils.createDir(outputFolder + File.separator + "code");
Utils.createDir(outputFolder + File.separator + "content");
Utils.createDir(outputFolder + File.separator + "meta");
decryptFSTEntriesTo(true, ".*", outputFolder, skipExisting);
}
public void decryptFSTEntriesTo(String regEx, String outputFolder, boolean skipExisting) throws IOException, CheckSumWrongException {
decryptFSTEntriesTo(true, regEx, outputFolder, skipExisting);
}
public void decryptFSTEntriesTo(boolean fullPath, String regEx, String outputFolder, boolean skipExisting) throws IOException, CheckSumWrongException {
decryptFSTEntryListTo(fullPath, FSTUtils.getFSTEntriesByRegEx(dataProvider.getRoot(), regEx), outputFolder, skipExisting);
}
public void decryptFSTEntryListTo(List<FSTEntry> list, String outputFolder, boolean skipExisting) throws IOException, CheckSumWrongException {
decryptFSTEntryListTo(true, list, outputFolder, skipExisting);
}
public void decryptFSTEntryListTo(boolean fullPath, List<FSTEntry> list, String outputFolder, boolean skipExisting)
throws IOException, CheckSumWrongException {
if (parallelizable && Settings.ALLOW_PARALLELISATION) {
try {
decryptFSTEntryListToAsync(fullPath, list, outputFolder, skipExisting).get();
} catch (InterruptedException | ExecutionException e) {
throw new RuntimeException(e);
}
} else {
for (val entry : list) {
decryptFSTEntryTo(fullPath, entry, outputFolder, skipExisting);
}
}
}
public CompletableFuture<Void> decryptFSTEntryListToAsync(boolean fullPath, List<FSTEntry> list, String outputFolder, boolean skipExisting)
throws IOException, CheckSumWrongException {
return CompletableFuture
.allOf(list.stream().map(entry -> decryptFSTEntryToAsync(fullPath, entry, outputFolder, skipExisting)).toArray(CompletableFuture[]::new));
}
}