112 lines
4.6 KiB
Java
112 lines
4.6 KiB
Java
/****************************************************************************
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* Copyright (C) 2016-2020 Maschell
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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package de.mas.wiiu.jnus;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.security.NoSuchProviderException;
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import java.text.ParseException;
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import java.util.Optional;
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import java.util.function.Supplier;
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import de.mas.wiiu.jnus.entities.TMD;
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import de.mas.wiiu.jnus.entities.Ticket;
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import de.mas.wiiu.jnus.entities.content.Content;
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import de.mas.wiiu.jnus.entities.fst.FST;
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import de.mas.wiiu.jnus.entities.fst.FSTEntry;
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import de.mas.wiiu.jnus.implementations.FSTDataProviderNUSTitle;
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import de.mas.wiiu.jnus.interfaces.ContentDecryptor;
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import de.mas.wiiu.jnus.interfaces.ContentEncryptor;
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import de.mas.wiiu.jnus.interfaces.FSTDataProvider;
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import de.mas.wiiu.jnus.interfaces.NUSDataProcessor;
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import de.mas.wiiu.jnus.interfaces.NUSDataProvider;
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import de.mas.wiiu.jnus.interfaces.TriFunction;
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import de.mas.wiiu.jnus.utils.cryptography.NUSDecryption;
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import de.mas.wiiu.jnus.utils.cryptography.NUSEncryption;
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public class NUSTitleLoader {
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private NUSTitleLoader() {
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// should be empty
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}
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public static NUSTitle loadNusTitle(NUSTitleConfig config, Supplier<NUSDataProvider> dataProviderFunction,
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TriFunction<NUSDataProvider, Optional<ContentDecryptor>, Optional<ContentEncryptor>, NUSDataProcessor> dataProcessorFunction)
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throws IOException, ParseException {
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NUSDataProvider dataProvider = dataProviderFunction.get();
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TMD tmd = TMD.parseTMD(dataProvider.getRawTMD().orElseThrow(() -> new FileNotFoundException("No TMD data found")));
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if (config.isNoDecryption()) {
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NUSTitle result = NUSTitle.create(tmd, dataProcessorFunction.apply(dataProvider, Optional.empty(), Optional.empty()), Optional.empty(),
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Optional.empty());
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return result;
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}
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Optional<Ticket> ticket = Optional.empty();
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Optional<ContentDecryptor> decryption = Optional.empty();
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Optional<ContentEncryptor> encryption = Optional.empty();
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if (config.isTicketNeeded()) {
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Ticket ticketT = config.getTicket();
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if (ticketT == null) {
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Optional<byte[]> ticketOpt = dataProvider.getRawTicket();
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if (ticketOpt.isPresent()) {
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ticketT = Ticket.parseTicket(ticketOpt.get(), config.getCommonKey());
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}
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}
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if (ticketT == null) {
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throw new ParseException("Failed to get ticket data", 0);
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}
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ticket = Optional.of(ticketT);
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decryption = Optional.of(new NUSDecryption(ticketT));
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try {
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encryption = Optional.of(new NUSEncryption(ticketT));
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} catch (NoSuchProviderException e) {
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throw new IOException(e);
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}
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}
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NUSDataProcessor dpp = dataProcessorFunction.apply(dataProvider, decryption, encryption);
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// If we have just content, we don't have a FST.
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if (tmd.getAllContents().size() == 1) {
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// The only way to check if the key is right, is by trying to decrypt the whole thing.
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NUSTitle result = NUSTitle.create(tmd, dpp, ticket, Optional.empty());
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FSTDataProvider dp = new FSTDataProviderNUSTitle(result);
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for (FSTEntry children : dp.getRoot().getChildren()) {
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dp.readFile(children);
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}
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return result;
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}
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// If we have more than one content, the index 0 is the FST.
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Content fstContent = tmd.getContentByIndex(0);
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byte[] fstBytes = dpp.readPlainDecryptedContent(fstContent, true);
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FST fst = FST.parseFST(fstBytes);
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// The dataprovider may need the FST to calculate the offset of a content
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// on the partition.
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dataProvider.setFST(fst);
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return NUSTitle.create(tmd, dpp, ticket, Optional.of(fst));
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}
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}
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