public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var isf = arc as IsfArchive;
if (null == isf || entry.Type != "script" || entry.Size <= 0x10)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
bool encoded = arc.File.View.AsciiEqual(entry.Offset + entry.Size - 0x10, "SECRETFILTER100a");
uint entry_size = entry.Size;
if (encoded)
{
entry_size -= 0x10;
if (null == isf.Secret)
{
isf.Secret = QuerySecret();
}
if (null == isf.Secret || 0 == isf.Secret.Length)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
}
var data = new byte[entry_size];
arc.File.View.Read(entry.Offset, data, 0, entry_size);
if (encoded)
{
var decoder = new IsfDecoder(isf.Secret);
decoder.Decode(data);
}
int signature = LittleEndian.ToUInt16(data, 4);
if (0x9795 == signature)
{
ApplyTransformation(data, 8, x => x >> 2 | x << 6);
}
else if (0xd197 == signature)
{
ApplyTransformation(data, 8, x => ~x);
}
else if (0xce89 == signature && 0 != data[6])
{
byte key = data[6];
ApplyTransformation(data, 8, x => x ^ key);
}
return(new BinMemoryStream(data, entry.Name));
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var isf = arc as IsfArchive;
if (null == isf || entry.Type != "script" || entry.Size <= 0x10)
return arc.File.CreateStream (entry.Offset, entry.Size);
bool encoded = arc.File.View.AsciiEqual (entry.Offset+entry.Size-0x10, "SECRETFILTER100a");
uint entry_size = entry.Size;
if (encoded)
{
entry_size -= 0x10;
if (null == isf.Secret)
isf.Secret = QuerySecret();
if (null == isf.Secret || 0 == isf.Secret.Length)
return arc.File.CreateStream (entry.Offset, entry.Size);
}
var data = new byte[entry_size];
arc.File.View.Read (entry.Offset, data, 0, entry_size);
if (encoded)
{
var decoder = new IsfDecoder (isf.Secret);
decoder.Decode (data);
}
int signature = LittleEndian.ToUInt16 (data, 4);
if (0x9795 == signature)
{
ApplyTransformation (data, 8, x => x >> 2 | x << 6);
}
else if (0xd197 == signature)
{
ApplyTransformation (data, 8, x => ~x);
}
else if (0xce89 == signature && 0 != data[6])
{
byte key = data[6];
ApplyTransformation (data, 8, x => x ^ key);
}
return new MemoryStream (data);
}
