View source for Arx Fatalis PAK

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== PAK == 

* ''' Format Type ''':    Archive <br> 
* ''' [http://en.wikipedia.org/wiki/Endianness Endian Order] ''': Little Endian <br> 


=== Format Specifications === 

<tt><b>
<font color="blue"> ''' // ARCHIVE HEADER ''' </font> <br>
:uint32 {4}&nbsp;&nbsp; - Directory Offset <br> 
<br>
byte {X}&nbsp;&nbsp;&nbsp;&nbsp; - File Data <br> 
<br>
<font color="blue"> ''' // FILES DIRECTORY ''' </font> <br>
: uint32 {4}&nbsp;&nbsp; - Directory Length <br> 
<font color="blue"> ''' // for each directory ''' </font> <br> 
: char {X}&nbsp;&nbsp;&nbsp;&nbsp; - Path <br> 
: byte {1}&nbsp;&nbsp;&nbsp;&nbsp; - null Path Terminator <br> 
: uint32 {4}&nbsp;&nbsp; - Number Of Files <br> 
:: <font color="blue"> ''' // for each file ''' </font> <br> 
::: char {X}&nbsp;&nbsp;&nbsp;&nbsp; - Filename <br> 
::: byte {1}&nbsp;&nbsp;&nbsp;&nbsp; - null Filename Terminator <br> 
::: uint32 {4}&nbsp;&nbsp; - File Offset <br> 
::: uint32 {4}&nbsp;&nbsp; - Packed flag (<font color="purple">0 - unpacked, else - PKWARE implode</font>) <br> 
::: uint32 {4}&nbsp;&nbsp; - Decompressed Length (<font color="purple">0 if not packed - use File Length below</font>)<br> 
::: uint32 {4}&nbsp;&nbsp; - File Length <br> 
<br>
</b></tt>

=== Notes and Comments ===

* In retail version Directory XORed with string:

AVQF3FCKE50GRIAYXJP2AMEYO5QGA0JGIIH2NHBTVOA1VOGGU5H3GSSIARKPRQPQKKYEOIAQG1XRX0J4F5OEAEFI4DD3LL45VJTVOA1VOGGUKE50GRIAYX

* There are two type of demo version - first one doesn't use any XOR in Directory and second one use different from retail string:

NSIARKPRQPHBTE50GRIH3AYXJP2AMF3FCEYAVQO5QGA0JGIIH2AYXKVOA1VOGGU5GSQKKYEOIAQG1XRX0J4F5OEAEFI4DD3LL45VJTVOA1VOGGUKE50GRI

* The way to detect which key must be used (or not used at all) is to read first 5 bytes (first entry always empty and have 0 files: 1 (null Path Terminator) + 4 (Number Of Files) = 5) of the Directory and compare it with: 5 zero bytes (demo1 - no encryption), "AVQF3" (retail) or "NSIAR" (demo2).

=== MultiEx BMS Script === 

<pre>
ImpType StandardTail ;
SavePos TailOffOff 0 ;
Get TO Long 0 ;
GoTo TO 0 ;
Get TS Long 0 ;
SavePos T 0 ;
Math T += 5 ;
GoTo T 0 ;
Get Path String 0 ;
Get FN Long 0 ;
For D = 1 To FN ;
Set Name String Path ;
Get Name String 0 ;
SavePos FOO 0 ;
Get FO Long 0 ;
Get ZipState Long 0 ;
Get OrSize Long 0 ;
SavePos FSO 0 ;
Get FS Long 0 ;
Log Name FO FS FOO FSO ;
Next D ;
</pre>

=== Compatible Programs === 

* [[MultiEx_Commander|MultiEx Commander]]
* [[Game Extractor|Game Extractor]]<br>
* [http://www.ctpax-x.org/?goto=files&show=100 Arx Fatalis .PAK unpacker] - with C++ source code
* arxunpak
* [http://teachsolaisgames.com/utils/ArxPakFull.zip ArxPak]
* [http://dimoks86.narod.ru/files/Danae.rar afunpak]
* [https://github.com/karablin/arx-unpacker arx-unpacker]
<br><br>


[[Category:Extension_pak | Extension: pak]]
[[Category:XOR encryption]]
[[Category:File Format]]