Howto Decode fafreplay body?

[MikZZ]

Hello guys.
I need help.
Cant understand how to uncompress body of fafreplay.

Here is example of PHP code.

Code: Select all

$parse_str = file("111111.fafreplay", FILE_IGNORE_NEW_LINES);
$body= $parse_str[1];
$body_d= base64_decode($body);
$uncompressed = gzuncompress ($body_d);


But Im getting error: " gzuncompress(): data error"
I have no idea wahts going wrong.
Plese help.

[MikZZ]

PHP script file charset is UTF-8. Same as fafreplay file.
If somebody can help me I will be glad.

As I know the basic thing is:
first decode string by base64
second decompress by zlib


I did that but has no luck.

[MikZZ]

If somebody will get same error I found solution.
This is for PHP.

Well, that block of C# code adds a 4-byte length to the beginning of the gzip-encoded data, which by definition includes a header and a CRC/length trailer. So of course the PHP functions won't recognize it. Cut out all of that BlockCopy crap.

Not tested, but maybe something like this:

https://www.neowin.net/forum/topic/9941 ... ring-gzip/

So code now is:

Code: Select all

$parse_str = file("111111.fafreplay", FILE_IGNORE_NEW_LINES);
$body= $parse_str[1];
$body_d= base64_decode($body);
$uncompressed = gzuncompress (substr($body_d,4));

[Uveso]

Nice one.

Thank's for sharing this!

[relent0r]

Bit of a necro but given that this post helped me heaps, for future strugglers.
Python equivalent (probably not a smartest way but still)

Code: Select all

import base64
import zlib

replay = 'C:\\ProgramData\\FAForever\\replays\\10123254-relentless.fafreplay'
f = open(replay,'r')
lines = f.readlines()[1:]
data = base64.b64decode(lines[0])
result = zlib.decompress(data[4:])
f.close()