[Java] Cosmic Break KAR Encryption / Decryption Algo

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Here extracted and decrypted java class files from executable. Some general parts decompiled.

Maybe some one who understand JAVA programming language make packer / unpacker for KAR archives :)

I be able to compile tool, but can't check, need password. Kar files crypted with key maked from password.

Code:

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          CryptKey(String key) // key = password
          {
                long hash = 0L;
                for (int i = 0; i < key.length(); i++) {
                  hash = 31L * hash + key.charAt(i);
                }
                setSeed(hash);
          }

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lol wanted to see this since it wasn't posted on xentax directly but I guess I have to wait until my account's out of lurker mode

Updated source's. Try pwd

Code:

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dhfuhsudfh98vhdsovnfdhiouer8u8hgjbkjciudsuifsjdiosajfn

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Are you sure it's source of current kar format?

I founded some differences in header. Here is right:

Quote:

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void readExternal(DataInput in)
throws IOException, ClassNotFoundException
{
in.readByte(); // not known, not present in default
if(in.readBoolean())
password = in.readUTF();
timestamp = in.readLong();
in.readByte(); // not known, not present in default
String deflatet = in.readUTF(); // was byte
deflate = Integer.parseInt(deflatet.substring(deflatet.index Of("=") + 1, deflatet.length() - 1)) <= 0 ? false : true;

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One more interesting thing:
password digest stored in kar(password = in.readUTF();) has 29 symbols "8612427997cc3b484346c73f11bba", but must be 32, coz it's md5.

Password do not match if nothing changed, password need to decrypt files. For headers is no need.

Some files from image.kar:
/arena/cg_loadingstg1_poyeen05.png
/arena/cg_room1img_a00_01.png
/mate/cg_mate2_B_angry.png
/arena/cg_loadingstg1_black02.png
/arena/cg_loadingstg1_event004.png
/other/ic_planet_flowy.png
/loading/loading_001.png

Quote:

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Originally Posted by toptaran [Only registered and activated users can see links. Click Here To Register...]

Are you sure it's source of current kar format?

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Java classes from latest version client.

Quote:

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Originally Posted by toptaran [Only registered and activated users can see links. Click Here To Register...]

password digest stored in kar(password = in.readUTF() has 29 symbols "8612427997cc3b484346c73f11bba", but must be 32, coz it's md5.

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No ideas :dunno:

btw: [Only registered and activated users can see links. Click Here To Register...] game used too KAR

Here you are version can list files and extract one of files.

If we will found password or what's wrong i rewrite it.

Good. I check it later :)

Haha, there are two KarSource files, one of them only to confuse us.
For example right entry structure:

Quote:

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void readExternal(DataInput in) throws IOException, ClassNotFoundException
{
in.readShort();
password = in.readUTF();
timestamp = in.readLong();
int b = in.readByte();
if (b > 0) {
String ext = in.readUTF();
int i = ext.indexOf("deflate=");
if (i >= 0) {
String ls = ext.substring(i);
i = ls.indexOf(",");
if (i >= 0) {
ls = ls.substring("deflate=".length(), i);
deflevel = Integer.parseInt(ls);
}
deflater = new Deflater(deflevel);
}

}

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Rewrite unpacker :-P