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NRO Validation

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The NRO files are now validated before they're added to the game list.
This commit is contained in:
◱ PixelyIon 2019-07-04 01:25:06 +05:30
parent 0eef380781
commit 012b1df5d8
3 changed files with 34 additions and 5 deletions
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2
app/src/main/java/gq/cyuubi/lightswitch/FileAdapter.java
View File

@ -28,7 +28,7 @@ class GameItem {
public GameItem(File file) {
this.file = file;
index = file.getName().lastIndexOf(".");
meta = NroMeta.GetNroTitle(getPath());
meta = NroMeta.getTitleEntry(getPath());
}
public Bitmap getIcon() {

4
app/src/main/java/gq/cyuubi/lightswitch/MainActivity.java
View File

@ -51,7 +51,9 @@ public class MainActivity extends AppCompatActivity {
try {
String file_str = file_i.getName();
if (ext.equalsIgnoreCase(file_str.substring(file_str.lastIndexOf(".") + 1))) {
files.add(file_i);
if(NroMeta.verifyFile(file_i.getAbsolutePath())) {
files.add(file_i);
}
}
} catch (StringIndexOutOfBoundsException e) {
}

33
app/src/main/java/gq/cyuubi/lightswitch/NroMeta.java
View File

@ -32,7 +32,7 @@ final class TitleEntry {
}
public class NroMeta {
public static TitleEntry GetNroTitle(String file) {
public static TitleEntry getTitleEntry(String file) {
try {
RandomAccessFile f = new RandomAccessFile(file, "r");
f.seek(0x18); // Skip to NroHeader.size
@ -41,7 +41,7 @@ public class NroMeta {
byte[] buffer = new byte[4];
f.read(buffer);
if (!(new String(buffer).equals("ASET")))
return null;
throw new IOException();
f.skipBytes(0x4);
long iconOffset = Long.reverseBytes(f.readLong());
@ -57,7 +57,7 @@ public class NroMeta {
long nacpOffset = Long.reverseBytes(f.readLong());
long nacpSize = Long.reverseBytes(f.readLong());
if (nacpOffset == 0 || nacpSize == 0)
return null;
throw new IOException();
f.seek(asetOffset + nacpOffset);
byte[] name = new byte[0x200];
f.read(name);
@ -70,4 +70,31 @@ public class NroMeta {
return null;
}
}
public static boolean verifyFile(String file) {
try {
RandomAccessFile f = new RandomAccessFile(file, "r");
f.seek(0x18); // Skip to NroHeader.size
int asetOffset = Integer.reverseBytes(f.readInt());
f.seek(asetOffset); // Skip to the offset specified by NroHeader.size
byte[] buffer = new byte[4];
f.read(buffer);
if (!(new String(buffer).equals("ASET")))
return false;
f.skipBytes(0x4);
long iconOffset = Long.reverseBytes(f.readLong());
int iconSize = Integer.reverseBytes(f.readInt());
if (iconOffset == 0 || iconSize == 0)
return false;
f.seek(asetOffset + 0x18);
long nacpOffset = Long.reverseBytes(f.readLong());
long nacpSize = Long.reverseBytes(f.readLong());
if (nacpOffset == 0 || nacpSize == 0)
return false;
} catch (IOException e) {
return false;
}
return true;
}
}