Python 3.6+ Implementation of Zoom.us SDK Signature Generation

zoom_utils.py

import time

import base64
import hashlib
import hmac


def generate_signature(sig_ingredients: dict) -> str:
    """Python 3.6+ implementation of Zoom Signature Generation

    Each request to start or join a meeting / webinar must
    be verified by an encrypted signature authorizing the
    user to enter.
    https://marketplace.zoom.us/docs/sdk/native-sdks/web/essential/signature

    :param sig_ingredients: used to create signature hash
    :type sig_ingredients: object
    :return: encrypted signature
    :rtype: str
    """
    mtg_number: str = str(sig_ingredients['meetingNumber'])
    api_key: str = str(sig_ingredients['apiKey'])
    role: str = str(sig_ingredients['role'])
    api_secret: bytes = bytes(str(sig_ingredients['apiSecret']), 'utf-8')

    ts: str = str(int(round(time.time() * 1000)) - 30000)
    msg: str = api_key + mtg_number + ts + role
    message: base64 = base64.b64encode(bytes(msg, 'utf-8'))

    hash_value = hmac.new(api_secret, message, hashlib.sha256)
    hash_value = base64.b64encode(hash_value.digest())
    hash_value: hashlib = hash_value.decode("utf-8")
    tmp_string: str = f"{api_key}.{mtg_number}.{ts}.{role}.{hash_value}"
    signature: bytes = base64.b64encode(bytes(tmp_string, "utf-8"))
    signature: str = signature.decode("utf-8").rstrip("=")

    return signature