Template to generate JWT on Apple Store API

apple_jwt_generator.py

import jwt
from datetime import datetime

def get_token(authkey="privatekey.pem", ISSUER_ID = "UUID", KEY_ID = "KEYID"):
    """
    Generater JSON Web Token from AppleStore API
    """
    key = None
    with open(authkey) as f:
        key = f.read()
    key

    st_certd_jwt = jwt.encode(payload={
        'iss': ISSUER_ID,
        'exp': int(datetime.now().timestamp()) + 20 * 60,
        'aud': "appstoreconnect-v1"
       },
        key=key,
        headers={
         'kid': KEY_ID },
        algorithm='ES256')
    return st_certd_jwt.decode()

apple_jwt_generator.rb

require "base64"
require "jwt"

ISSUER_ID = "UUDI"
KEY_ID = "KEYID"
private_key = OpenSSL::PKey.read(File.read('AuthKey_XXXXXXXXXX.p8'))
token = JWT.encode(
   {
    iss: ISSUER_ID,
    exp: Time.now.to_i + 20 * 60,
    aud: "appstoreconnect-v1"
   },
   private_key,
   "ES256",
   header_fields={
     kid: KEY_ID }
 )
puts token