Forum :: Client Editing :: Questions about edf files

I'm messing arround a bit with the edf files makeing an editor but before I get to deep I just want to know a couple things.

1: Didnt Vult-R hardcode a few things credits ect..what else?

2: Does'nt the edited string need to be the same amount of characters/bytes as  the original? If so I'm going to put a visual max_characters function/counter on the edited string.Also does this apply to all files..I'm guessing atleast not on the curse filter!

I added some info to the wiki based on my findings for my client: https://eoserv.net/wiki/EDF_Data_Files.

It covers the content in the individual files, does a step-by-step decoding process, and provides a complete C# code sample for decoding them.

To answer your questions directly:

1. I'm pretty sure credits are hard-coded into the client, since the credits in the EDF file aren't encoded, and I don't think editing them does anything.
2. Yes. If your encoding/decoding algorithm produces an output with a different length, you messed something up.

---
class EOSERV {
Programmer | Oldbie
Open source EO Client: https://github.com/ethanmoffat/EndlessClient
};

Credits are both hard-coded and not. If an integrity check isn't passed in the EDF credits, the client will default to the hard-coded ones.

ethanmoffat posted: (16th Nov 2016, 08:43 pm)

I added some info to the wiki based on my findings for my client: https://eoserv.net/wiki/EDF_Data_Files.

It covers the content in the individual files, does a step-by-step decoding process, and provides a complete C# code sample for decoding them.

To answer your questions directly:

1. I'm pretty sure credits are hard-coded into the client, since the credits in the EDF file aren't encoded, and I don't think editing them does anything.
2. Yes. If your encoding/decoding algorithm produces an output with a different length, you messed something up.

I wasnt talking about the output of the decoded string but an edited decoded string  so if the original decoded string is "endless-online" length 14 and an operator wanted to change that string to "myserver-online" length 15. I seen your wiki topic a while back and converted the C# function you posted to decode the files to c++. I then wrote this function to encode the strings..

void EOData::Swap(char a,char b,int dw)
{
    if(static_cast<int>(a)%dw == 0 && static_cast<int>(b)%dw == 0)
    {
         std::swap(a,b);
    }
}

std::string EOData::EncodeEDF(std::string str)
{
    std::string ret = "";
    unsigned int length = str.length();

    for(unsigned int i = 0; i < length;++i)
    {
        this->Swap(str[i],str[i+1],7);
      
        ret += str[i];

        if(length > 1 && i != --length)
        {
            this->Swap(str[length-1],str[length],7);
      
            ret += str[length];
        }
    }
    return ret;
}

Thankyou the wiki page is very usefull!

@Apollo.. So its like a fallback if the client detects the file being tampered with...Thankyou!

Is it just the credits that are hardcoded? What is dat002.edf?  "DAT001.ID{614641:145:38:4284}"

dat002.edf contains a checksum/hash of dat001.edf to detect any modification. It's pretty easy to figure out (like the abandoned RID of pub files) but I see no reason you should be altering the credits. Hacking/modification is great but nobody deserves more credit than the original creator. Seriously, leave the credits alone. NO private servers deserve to trespass there.

---
http://sordie.co.uk
http://twitter.com/@SordieEO

Sordie posted: (17th Nov 2016, 02:20 am)

dat002.edf contains a checksum/hash of dat001.edf to detect any modification. It's pretty easy to figure out (like the abandoned RID of pub files) but I see no reason you should be altering the credits. Hacking/modification is great but nobody deserves more credit than the original creator. Seriously, leave the credits alone. NO private servers deserve to trespass there.

My interest began with the desire to alter a few npc dialogs specificly Law Bob and the Priest. I'm working on a project where players will have no use for a marriage system and I dont want to leave these usable resources untapped :D.

 I never thought about editing the credits but now that you put it that way I wont mess with the checksum or even add support for that file in the editor.

It would have been nice if Vult-R built server sided code to alter the edf files.