Getting a serial number - GameCreators Forum

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sammm

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Posted: 6th Dec 2021 13:52

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Hey,

I am trying to find a way to add simple security to my raspberry pi program (simple is the key word). One of the ideas that I am playing around with is to lock my program to just one raspberry pi by using the raspberry pi's unique serial number. Is there a simple way to write an app game kit function to read the raspberry pi's serial number into a variable? Thank you for any suggestions

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Virtual Nomad

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Posted: 6th Dec 2021 14:02 Edited at: 6th Dec 2021 14:06

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hopefully GetDeviceID() works on Pi.

this will copy the device ID to you clipboard so you can paste it in code/do something with it:

+ Code Snippet

SetClipboardText(GetDeviceID())
do
 
    Print( GetDeviceID() )
    Sync()
loop

but, if you use that string as-is, it will probably still be visible to anyone who opens the apps .byc file. see here: https://forum.thegamecreators.com/thread/226279

so, that's the simple part but how secure is up to you.

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PartTimeCoder

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Posted: 6th Dec 2021 16:15 Edited at: 6th Dec 2021 16:16

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Quote: "but, if you use that string as-is"

Yup, run it through a simple ROT system, make a small app to encrypt the device id, save it and add it to the main project, so only the encrypted key will be visible in the .byc file.

+ Code Snippet

// Add this function to both projects
Function ROT(input as string, amont as integer)
    output as string
    l = len(input)
    for i=1 to l
        char$ = Mid(input, i, 1)
        output=output+Chr(Asc(char$)+amont)
    next
EndFunction output
 
 
// Encrypt project
enCrypted$ = ROT(ROT(ROT(ROT(ROT(GetDeviceID(), 24), -15), 75), 12), 16)
SetClipboardText(enCrypted$)


// Decrypt (main project)
deCcrypted$ = ROT(ROT(ROT(ROT(ROT(enCrypted$, -24), 15), -75), -12), -16)
if deCcrypted$ = GetDeviceID()
	Message("Success")
else
	Message("You are not authorised to use this app.")
endif

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sammm

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Posted: 7th Dec 2021 13:32

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Perfect! Thank you! This is exactly what I was looking for

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sammm

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Posted: 9th Dec 2021 15:46 Edited at: 9th Dec 2021 15:46

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Bad news - it appears that the getdeviceid() doesn't work on the raspberry pi. Running the command returns nothing. Any other suggestions for locking a program to just one raspberry pi?

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Virtual Nomad

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Posted: 10th Dec 2021 01:53 Edited at: 10th Dec 2021 01:55

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Quote: "Any other suggestions"

transfer a file to somewhere on your pi named anything, say "my.key" and have the app look for it via GetFileExist()?

you may not want to name it something so obvious or place in anywhere too obvious

meanwhile, consider reporting an issue @ github advising GetDeviceID() returns "" on Pi (include version(s) of Pi & AGK/S tested).

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PartTimeCoder

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Posted: 10th Dec 2021 15:32 Edited at: 10th Dec 2021 15:41

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You can get the device serial number from"/sys/firmware/devicetree/base/serial-number" or "/proc/cpuinfo"

this function is from Node.js but you should be able to transcode it into AppGameKit using "raw:" file paths

+ Code Snippet

function getserial(){
   var fs = require('fs');
   var content = fs.readFileSync('/proc/cpuinfo', 'utf8');
   var cont_array = content.split("\n");
   var serial_line = cont_array[cont_array.length-2];
   var serial = serial_line.split(":");
   return serial[1].slice(1);
}

https://raspberrypi.stackexchange.com/questions/2086/how-do-i-get-the-serial-number

Edit:, yeah its not implemented on Pi, report it and get that todo changed into a done!

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Virtual Nomad

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Posted: 12th Dec 2021 15:38 Edited at: 12th Dec 2021 15:39

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Request for implementation added: https://github.com/TheGameCreators/AGK-Studio/issues/925

i know there are a number of users who would benefit from increased Pi support so please give the issue a thumbs up.

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tboy

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Posted: 12th Dec 2021 16:49 Edited at: 12th Dec 2021 16:52

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If you use Tier 2, you can get the machine id on the Raspberry Pi like this:

+ Code Snippet

#include <iostream>
#include <fstream>
#include <string>

#include "template.h"

using namespace AGK;
using namespace std;

app App;

string machineID;

void app::Begin(void)
{
	ifstream readFile("/etc/machine-id");
	getline(readFile, machineID);
	readFile.close();
	
	agk::SetVirtualResolution (1024, 768);
	agk::SetClearColor( 151,170,204 ); // light blue
	agk::SetSyncRate(60,0);
	agk::SetScissor(0,0,0,0);
}

int app::Loop (void)
{
	agk::Print( agk::ScreenFPS() );
	
	agk::PrintC("MachineID: ");
    agk::Print(machineID.c_str());
    
	agk::Sync();

	return 0;
}


void app::End (void)
{

}

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Raspberry Pi / Getting a serial number

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