JNUSLib/src/de/mas/wiiu/jnus/implementations/wud/parser/WUDInfoParser.java

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package de.mas.wiiu.jnus.implementations.wud.parser;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import de.mas.wiiu.jnus.Settings;
import de.mas.wiiu.jnus.entities.content.ContentFSTInfo;
import de.mas.wiiu.jnus.entities.fst.FST;
import de.mas.wiiu.jnus.entities.fst.FSTEntry;
import de.mas.wiiu.jnus.implementations.wud.reader.WUDDiscReader;
import de.mas.wiiu.jnus.utils.ByteUtils;
import de.mas.wiiu.jnus.utils.Utils;
import lombok.extern.java.Log;
@Log
// TODO: reduce magic numbers
public final class WUDInfoParser {
public static byte[] DECRYPTED_AREA_SIGNATURE = new byte[] { (byte) 0xCC, (byte) 0xA6, (byte) 0xE6, 0x7B };
public static byte[] PARTITION_FILE_TABLE_SIGNATURE = new byte[] { 0x46, 0x53, 0x54, 0x00 }; // "FST"
public final static int PARTITION_TOC_OFFSET = 0x800;
public final static int PARTITION_TOC_ENTRY_SIZE = 0x80;
public static final String WUD_TMD_FILENAME = "title.tmd";
public static final String WUD_TICKET_FILENAME = "title.tik";
public static final String WUD_CERT_FILENAME = "title.cert";
private WUDInfoParser() {
//
}
public static WUDInfo createAndLoad(WUDDiscReader discReader, byte[] titleKey) throws IOException {
WUDInfo result = new WUDInfo(titleKey, discReader);
byte[] PartitionTocBlock = discReader.readDecryptedToByteArray(Settings.WIIU_DECRYPTED_AREA_OFFSET, 0, 0x8000, titleKey, null);
// verify DiscKey before proceeding
if (!Arrays.equals(Arrays.copyOfRange(PartitionTocBlock, 0, 4), DECRYPTED_AREA_SIGNATURE)) {
log.info("Decryption of PartitionTocBlock failed");
return null;
}
Map<String, WUDPartition> partitions = readPartitions(result, PartitionTocBlock);
result.getPartitions().clear();
result.getPartitions().putAll(partitions);
return result;
}
private static Map<String, WUDPartition> readPartitions(WUDInfo wudInfo, byte[] partitionTocBlock) throws IOException {
ByteBuffer buffer = ByteBuffer.allocate(partitionTocBlock.length);
buffer.order(ByteOrder.BIG_ENDIAN);
buffer.put(partitionTocBlock);
buffer.position(0);
int partitionCount = (int) ByteUtils.getUnsingedIntFromBytes(partitionTocBlock, 0x1C, ByteOrder.BIG_ENDIAN);
Map<String, WUDPartition> partitions = new HashMap<>();
byte[] gamePartitionTMD = new byte[0];
byte[] gamePartitionTicket = new byte[0];
byte[] gamePartitionCert = new byte[0];
String realGamePartitionName = null;
// populate partition information from decrypted TOC
for (int i = 0; i < partitionCount; i++) {
int offset = (PARTITION_TOC_OFFSET + (i * PARTITION_TOC_ENTRY_SIZE));
byte[] partitionIdentifier = Arrays.copyOfRange(partitionTocBlock, offset, offset + 0x19);
int j = 0;
for (j = 0; j < partitionIdentifier.length; j++) {
if (partitionIdentifier[j] == 0) {
break;
}
}
String partitionName = new String(Arrays.copyOfRange(partitionIdentifier, 0, j));
// calculate partition offset (relative from WIIU_DECRYPTED_AREA_OFFSET) from decrypted TOC
long tmp = ByteUtils.getUnsingedIntFromBytes(partitionTocBlock, (PARTITION_TOC_OFFSET + (i * PARTITION_TOC_ENTRY_SIZE) + 0x20),
ByteOrder.BIG_ENDIAN);
long partitionOffset = ((tmp * (long) 0x8000) - 0x10000);
WUDPartition partition = new WUDPartition(partitionName, partitionOffset);
if (partitionName.startsWith("SI")) {
byte[] fileTableBlock = wudInfo.getWUDDiscReader().readDecryptedToByteArray(Settings.WIIU_DECRYPTED_AREA_OFFSET + partitionOffset, 0, 0x8000,
wudInfo.getTitleKey(), null);
if (!Arrays.equals(Arrays.copyOfRange(fileTableBlock, 0, 4), PARTITION_FILE_TABLE_SIGNATURE)) {
log.info("FST Decrpytion failed");
continue;
}
FST fst = FST.parseFST(fileTableBlock, null);
byte[] rawTIK = getFSTEntryAsByte(WUD_TICKET_FILENAME, partition, fst, wudInfo.getWUDDiscReader(), wudInfo.getTitleKey());
byte[] rawTMD = getFSTEntryAsByte(WUD_TMD_FILENAME, partition, fst, wudInfo.getWUDDiscReader(), wudInfo.getTitleKey());
byte[] rawCert = getFSTEntryAsByte(WUD_CERT_FILENAME, partition, fst, wudInfo.getWUDDiscReader(), wudInfo.getTitleKey());
gamePartitionTMD = rawTMD;
gamePartitionTicket = rawTIK;
gamePartitionCert = rawCert;
// We want to use the real game partition
realGamePartitionName = partitionName = "GM" + Utils.ByteArrayToString(Arrays.copyOfRange(rawTIK, 0x1DC, 0x1DC + 0x08));
} else if (partitionName.startsWith(realGamePartitionName)) {
wudInfo.setGamePartitionName(partitionName);
partition = new WUDGamePartition(partitionName, partitionOffset, gamePartitionTMD, gamePartitionCert, gamePartitionTicket);
}
byte[] header = wudInfo.getWUDDiscReader().readEncryptedToByteArray(partition.getPartitionOffset() + 0x10000, 0, 0x8000);
WUDPartitionHeader partitionHeader = WUDPartitionHeader.parseHeader(header);
partition.setPartitionHeader(partitionHeader);
partitions.put(partitionName, partition);
}
return partitions;
}
private static byte[] getFSTEntryAsByte(String filename, WUDPartition partition, FST fst, WUDDiscReader discReader, byte[] key) throws IOException {
FSTEntry entry = getEntryByName(fst.getRoot(), filename);
ContentFSTInfo info = fst.getContentFSTInfos().get((int) entry.getContentFSTID());
// Calculating the IV
ByteBuffer byteBuffer = ByteBuffer.allocate(0x10);
byteBuffer.position(0x08);
byte[] IV = byteBuffer.putLong(entry.getFileOffset() >> 16).array();
return discReader.readDecryptedToByteArray(Settings.WIIU_DECRYPTED_AREA_OFFSET + (long) partition.getPartitionOffset() + (long) info.getOffset(),
entry.getFileOffset(), (int) entry.getFileSize(), key, IV);
}
private static FSTEntry getEntryByName(FSTEntry root, String name) {
for (FSTEntry cur : root.getFileChildren()) {
if (cur.getFilename().equals(name)) {
return cur;
}
}
for (FSTEntry cur : root.getDirChildren()) {
FSTEntry dir_result = getEntryByName(cur, name);
if (dir_result != null) {
return dir_result;
}
}
return null;
}
}