Instagram Login Signing magic

instagram_login_signing.py

import uuid as uuid_library
import hmac
import json
import hashlib
import requests
import six.moves.urllib as urllib

def hex_digest(*args):
    m = hashlib.md5()
    m.update(b''.join([arg.encode('utf-8') for arg in args]))
    return m.hexdigest()

def generate_device_id(seed):
    volatile_seed = "12345"  # Important ! :) :) 
    m = hashlib.md5()
    m.update(seed.encode('utf-8') + volatile_seed.encode('utf-8'))
    return 'android-' + m.hexdigest()[:16]

def generate_uuid():
    return str(uuid_library.uuid4())

def generate_signature(data):
    body = hmac.new(IG_SIG_KEY.encode('utf-8'), data.encode('utf-8'),
                    hashlib.sha256).hexdigest() + '.' + urllib.parse.quote(data)
    signature = 'ig_sig_key_version=4&signed_body={body}'
    return signature.format(body=body)