A Python function for creating credentials for using TURN services provided by eturnal STUN/TURN Server

eturnal-credentials.py

import base64
import hashlib
import hmac
import json
import time
from datetime import datetime, timedelta

def create_credentials(secret, suffix):
  """Creates credentials for Eturnal access available for 24 hours.
  
  Eturnal project: https://github.com/processone/eturnal
  Credentials based on the "REST API For Access To TURN Services": https://datatracker.ietf.org/doc/html/draft-uberti-behave-turn-rest-00
  """
  
  current_time = datetime.utcnow()
  future_time = current_time + timedelta(hours=24)
  expiry = future_time.strftime('%Y-%m-%dT%H:%M:%SZ')
  unix_time = int(time.mktime(time.strptime(expiry, '%Y-%m-%dT%H:%M:%SZ')))
  username = create_username(unix_time, suffix)

  hmac_obj = hmac.new(secret.encode('utf-8'), username.encode('utf-8'), hashlib.sha1)
  password = base64.b64encode(hmac_obj.digest()).decode('utf-8')
  
  return username, password