update: add sign script

[NinhDoan]

Hi
I just added file sign_script to help people use their own scripts, could you take a look at it and confirm that it works correctly?
Many thanks

[VuDn5]

@dkmstr ... and here, please review ít,

[dkmstr]

Hi, the first problem with the script you provide is that it uses "pycrypto", and it's discontinued... :(

https://www.pycrypto.org/

Maybe you are using pycryptodome, but anyway, it's not coherent with rest of uds code that uses cryptography... Hope you understand this.

Also, in order to include something like that to be useful, we need to include some more data, so it's really helpfull for the rest of people (Till today, no one has requested never to sign client scripts, until you ofc :) )

1. We need to explain WHERE change the public and private key

   • Include some documentation, what needs to be changed (that is, all EXISTING signatures, and the public check key on uds client...)
   • Explain that standard provided scripts and clients will not work with these
   • Explain that the best method to include some new functionality is, after doing it, request for us to sign it
   • Whatever...

2. Make the sign script using python cryptography api

   • look at here, the checking signature method: https://github.com/VirtualCable/uds-client/blob/d340a8075e7692354a1b486fde98d78ba165890b/full/src/uds/tools.py#L199

Regards,