Generate signature

An openOBD function can be called from another openOBD function. Before the function can be published on the Jifeline infrastructure it needs to be assigned a unique identifier. Along with this identifier, a signature is needed, that is used as proof that you are the actual owner of the function.

Below we show example code that can be used to obtain a unique function id and signature.

Info

We do not need to execute this, we can use our fresh_signatures.py script (defined here) to retrieve signatures for our functions.

Here, we demonstrate that signature creation is a one-time operation at the creation of your script.

When you want to test this, copy this to a python file (.py) and make it executable by this command line:

chmod 755 <filename.py>

Then, run your script, and see that it simply generates a fresh id and signature.

#!/bin/env python

from openobd import *

function = OpenOBD().generate_function_signature()

print(f" [+] Generated new function id: {function.id}")
print(f" [+]                 Signature: {function.signature}")

Register your EOBD script

  • Run the script to generate fresh signatures for your functions (defined here).

./fresh_signatures.py

  • Notice: every time you run this script, new id's and signatures will be generated.
  • Copy the id and signature for your EOBD script and make them permanent by copying them into the EOBD script.
  • Run your overview script:

./overview.py

and check that the id and signature of your EOBD script are now fixed every time you run this script.

Registering your scripts with a fixed id and signature is important in case you want to make function calls from your function to other functions.

But first, we will try to get our function on-line on our partner dashboard.

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