New iOS based notification script

[fbartolom]

I am trying to adopt the new Apple APN technology with the following Python script:

import json
import jwt
import time

from hyper import HTTPConnection

ALGORITHM = 'ES256'

APNS_KEY_ID = 'H6Q3X7RYZG'
APNS_AUTH_KEY = 'APNsAuthKey_H6Q3X7RYZG.p8'
TEAM_ID = 'GF9PQ87F68'
REGISTRATION_ID = '713d3a9f4d932ac824caf9373a2f182b2dfa710fb7b6214e3bd405ae1e32d0aa'
BUNDLE_ID = 'com.meditation.iPujaPro'
f = open(APNS_AUTH_KEY)
secret = f.read()
token = jwt.encode(
    {
        'iss': TEAM_ID,
        'iat': time.time()
    },
    secret, 
    algorithm= ALGORITHM,
    headers={
        'alg': ALGORITHM,
        'kid': APNS_KEY_ID
    }
)
path = '/3/device/{0}'.format(REGISTRATION_ID)

request_headers = {
    'apns-expiration': '0',
    'apns-priority': '10',
    'apns-topic': BUNDLE_ID,
    'authorization': 'bearer {0}'.format(token.decode('ascii'))
}

# Open a connection the APNS server
conn = HTTPConnection('api.development.push.apple.com:443')

payload_data = { 
    'aps': { 'alert' : 'All your base are belong to us.' } 
}
payload = json.dumps(payload_data).encode('utf-8')

# Send our request
conn.request(
    'POST', 
    path, 
    payload, 
    headers=request_headers
)
resp = conn.get_response()
print(resp.status)
print(resp.read())

# If we are sending multiple requests, use the same connection

payload_data = { 
    'aps': { 'alert' : 'You have no chance to survive. Make your time.' } 
}
payload = json.dumps(payload_data).encode('utf-8')

conn.request(
    'POST', 
    path, 
    payload, 
    headers=request_headers
)
resp = conn.get_response()
print(resp.status)
print(resp.read())

Yet, when I run it I get the following error: what should I do to have it working?

Output:
python3 apns_http2.py
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/site-packages/jwt/algorithms.py", line 224, in prepare_key
    key = load_pem_public_key(key, backend=default_backend())
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/primitives/serialization.py", line 24, in load_pem_public_key
    return backend.load_pem_public_key(data)
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/multibackend.py", line 314, in load_pem_public_key
    return b.load_pem_public_key(data)
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1110, in load_pem_public_key
    self._handle_key_loading_error()
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1325, in _handle_key_loading_error
    raise ValueError("Could not unserialize key data.")
ValueError: Could not unserialize key data.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "apns_http2.py", line 25, in <module>
    'kid': APNS_KEY_ID
  File "/usr/local/lib/python3.5/site-packages/jwt/api_jwt.py", line 56, in encode
    json_payload, key, algorithm, headers, json_encoder
  File "/usr/local/lib/python3.5/site-packages/jwt/api_jws.py", line 98, in encode
    key = alg_obj.prepare_key(key)
  File "/usr/local/lib/python3.5/site-packages/jwt/algorithms.py", line 226, in prepare_key
    key = load_pem_private_key(key, password=None, backend=default_backend())
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/primitives/serialization.py", line 20, in load_pem_private_key
    return backend.load_pem_private_key(data, password)
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/multibackend.py", line 305, in load_pem_private_key
    return b.load_pem_private_key(data, password)
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1084, in load_pem_private_key
    password,
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1253, in _load_key
    self._handle_key_loading_error()
  File "/usr/local/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1325, in _handle_key_loading_error
    raise ValueError("Could not unserialize key data.")
ValueError: Could not unserialize key data.