Generate Switchbot API v1.1 sign header

switchbot_sign.py

#!/usr/bin/env python3
# coding: utf-8

''' Create Switchbot sign header '''

import time
import hashlib
import hmac
import base64
import json
import uuid

def gensign(token, secret):
    '''
    Generate Switchbot API v1.1 sign header
    Args:
        token: string  :copy and paste from the SwitchBot app V6.14 or later
        secret: string :copy and paste from the SwitchBot app V6.14 or later
    Returns:
         Switchbot API v1.1 sign header
    '''

    nonce = str(uuid.uuid4())
    t = int(round(time.time() * 1000))
    string_to_sign = '{}{}{}'.format(token, t, nonce)
    
    string_to_sign = bytes(string_to_sign, 'utf-8')
    secret = bytes(secret, 'utf-8')
    
    sign = base64.b64encode(hmac.new(secret, msg=string_to_sign, digestmod=hashlib.sha256).digest())
    
    header={}
    header["Authorization"] = token
    header["sign"] = str(sign, 'utf-8')
    header["t"] = str(t)
    header["nonce"] = nonce

    return header