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Don't read invalid NAX0 files

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This commit is contained in:
Alex Barney 2019-01-27 19:39:06 -06:00
parent bd73237e98
commit e5f808cd2d
1 changed files with 13 additions and 1 deletions
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14
src/LibHac/IO/AesXtsDirectory.cs
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@ -32,6 +32,8 @@ namespace LibHac.IO
else
{
long size = GetAesXtsFileSize(entry.FullPath);
if (size == -1) continue;
yield return new DirectoryEntry(entry.Name, entry.FullPath, entry.Type, size);
}
}
@ -42,12 +44,22 @@ namespace LibHac.IO
return BaseDirectory.GetEntryCount();
}
/// <summary>
/// Reads the size of a NAX0 file from its header. Returns -1 on error.
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
private long GetAesXtsFileSize(string path)
{
try
{
using (IFile file = BaseFileSystem.OpenFile(path, OpenMode.Read))
{
if (file.GetSize() < 0x50)
{
return -1;
}
var buffer = new byte[8];
file.Read(buffer, 0x20);
@ -59,7 +71,7 @@ namespace LibHac.IO
}
catch (ArgumentOutOfRangeException)
{
return 0;
return -1;
}
}
}