CoturnHMAC

Complexity

Total Complexity

3

Size/Duplication

Total Lines	22
Duplicated Lines	0 %

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	fetch_token()	0	17	2
A	__init__()	0	3	1

"""
Coturn static auth api

Creates ice_server record with temporary credentials computed from coturn static-auth-secret

http://stackoverflow.com/a/35767224
"""

import time
import hmac
import base64
from server.config import COTURN_URL, COTURN_KEY, TWILIO_TTL

class CoturnHMAC:
    def __init__(self, coturn_url=None, coturn_key=None):
        self.coturn_url = coturn_url or COTURN_URL
        self.coturn_key = coturn_key or COTURN_KEY

    def fetch_token(self, username='faf-user', ttl=None):
        ttl = ttl or TWILIO_TTL
        if ttl is not None:
            ttl = int(ttl)
        else:
            ttl = 3600*24

        # create hmac of coturn_key + timestamp:username
        timestamp = int(time.time()) + ttl
        token_name = "{}:{}".format(timestamp, username)
        secret = hmac.new(self.coturn_key)
        hmac.update(token_name)
        auth_token = base64.b64encode(hmac.digest())

        return dict(url=self.coturn_url,
                    username=token_name,
                    credential=auth_token)