mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 17:35:04 +00:00
319 lines
11 KiB
Python
319 lines
11 KiB
Python
# -*- coding: utf-8 -*-
|
|
# BSD 2-Clause License
|
|
#
|
|
# Apprise - Push Notification Library.
|
|
# Copyright (c) 2023, Chris Caron <lead2gold@gmail.com>
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions are met:
|
|
#
|
|
# 1. Redistributions of source code must retain the above copyright notice,
|
|
# this list of conditions and the following disclaimer.
|
|
#
|
|
# 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
# this list of conditions and the following disclaimer in the documentation
|
|
# and/or other materials provided with the distribution.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
|
#
|
|
# To generate a private key file for your service account:
|
|
#
|
|
# 1. In the Firebase console, open Settings > Service Accounts.
|
|
# 2. Click Generate New Private Key, then confirm by clicking Generate Key.
|
|
# 3. Securely store the JSON file containing the key.
|
|
|
|
import requests
|
|
import base64
|
|
import json
|
|
import calendar
|
|
from cryptography.hazmat import backends
|
|
from cryptography.hazmat.primitives import hashes
|
|
from cryptography.hazmat.primitives import serialization
|
|
from cryptography.hazmat.primitives import asymmetric
|
|
from cryptography.exceptions import UnsupportedAlgorithm
|
|
from datetime import datetime
|
|
from datetime import timedelta
|
|
from datetime import timezone
|
|
from json.decoder import JSONDecodeError
|
|
from urllib.parse import urlencode as _urlencode
|
|
|
|
from ...logger import logger
|
|
|
|
|
|
class GoogleOAuth:
|
|
"""
|
|
A OAuth simplified implimentation to Google's Firebase Cloud Messaging
|
|
|
|
"""
|
|
scopes = [
|
|
'https://www.googleapis.com/auth/firebase.messaging',
|
|
]
|
|
|
|
# 1 hour in seconds (the lifetime of our token)
|
|
access_token_lifetime_sec = timedelta(seconds=3600)
|
|
|
|
# The default URI to use if one is not found
|
|
default_token_uri = 'https://oauth2.googleapis.com/token'
|
|
|
|
# Taken right from google.auth.helpers:
|
|
clock_skew = timedelta(seconds=10)
|
|
|
|
def __init__(self, user_agent=None, timeout=(5, 4),
|
|
verify_certificate=True):
|
|
"""
|
|
Initialize our OAuth object
|
|
"""
|
|
|
|
# Wether or not to verify ssl
|
|
self.verify_certificate = verify_certificate
|
|
|
|
# Our (connect, read) timeout
|
|
self.request_timeout = timeout
|
|
|
|
# assign our user-agent if defined
|
|
self.user_agent = user_agent
|
|
|
|
# initialize our other object variables
|
|
self.__reset()
|
|
|
|
def __reset(self):
|
|
"""
|
|
Reset object internal variables
|
|
"""
|
|
|
|
# Google Keyfile Encoding
|
|
self.encoding = 'utf-8'
|
|
|
|
# Our retrieved JSON content (unmangled)
|
|
self.content = None
|
|
|
|
# Our generated key information we cache once loaded
|
|
self.private_key = None
|
|
|
|
# Our keys we build using the provided content
|
|
self.__refresh_token = None
|
|
self.__access_token = None
|
|
self.__access_token_expiry = datetime.now(timezone.utc)
|
|
|
|
def load(self, path):
|
|
"""
|
|
Generate our SSL details
|
|
"""
|
|
|
|
# Reset our objects
|
|
self.content = None
|
|
self.private_key = None
|
|
self.__access_token = None
|
|
self.__access_token_expiry = datetime.now(timezone.utc)
|
|
|
|
try:
|
|
with open(path, mode="r", encoding=self.encoding) as fp:
|
|
self.content = json.loads(fp.read())
|
|
|
|
except (OSError, IOError):
|
|
logger.debug('FCM keyfile {} could not be accessed'.format(path))
|
|
return False
|
|
|
|
except JSONDecodeError as e:
|
|
logger.debug(
|
|
'FCM keyfile {} generated a JSONDecodeError: {}'.format(
|
|
path, e))
|
|
return False
|
|
|
|
if not isinstance(self.content, dict):
|
|
logger.debug(
|
|
'FCM keyfile {} is incorrectly structured'.format(path))
|
|
self.__reset()
|
|
return False
|
|
|
|
# Verify we've got the correct tokens in our content to work with
|
|
is_valid = next((False for k in (
|
|
'client_email', 'private_key_id', 'private_key',
|
|
'type', 'project_id') if not self.content.get(k)), True)
|
|
|
|
if not is_valid:
|
|
logger.debug(
|
|
'FCM keyfile {} is missing required information'.format(path))
|
|
self.__reset()
|
|
return False
|
|
|
|
# Verify our service_account type
|
|
if self.content.get('type') != 'service_account':
|
|
logger.debug(
|
|
'FCM keyfile {} is not of type service_account'.format(path))
|
|
self.__reset()
|
|
return False
|
|
|
|
# Prepare our private key which is in PKCS8 PEM format
|
|
try:
|
|
self.private_key = serialization.load_pem_private_key(
|
|
self.content.get('private_key').encode(self.encoding),
|
|
password=None, backend=backends.default_backend())
|
|
|
|
except (TypeError, ValueError):
|
|
# ValueError: If the PEM data could not be decrypted or if its
|
|
# structure could not be decoded successfully.
|
|
# TypeError: If a password was given and the private key was
|
|
# not encrypted. Or if the key was encrypted but
|
|
# no password was supplied.
|
|
logger.error('FCM provided private key is invalid.')
|
|
self.__reset()
|
|
return False
|
|
|
|
except UnsupportedAlgorithm:
|
|
# If the serialized key is of a type that is not supported by
|
|
# the backend.
|
|
logger.error('FCM provided private key is not supported')
|
|
self.__reset()
|
|
return False
|
|
|
|
# We've done enough validation to move on
|
|
return True
|
|
|
|
@property
|
|
def access_token(self):
|
|
"""
|
|
Returns our access token (if it hasn't expired yet)
|
|
- if we do not have one we'll fetch one.
|
|
- if it expired, we'll renew it
|
|
- if a key simply can't be acquired, then we return None
|
|
"""
|
|
|
|
if not self.private_key or not self.content:
|
|
# invalid content (or not loaded)
|
|
logger.error(
|
|
'No FCM JSON keyfile content loaded to generate a access '
|
|
'token with.')
|
|
return None
|
|
|
|
if self.__access_token_expiry > datetime.now(timezone.utc):
|
|
# Return our no-expired key
|
|
return self.__access_token
|
|
|
|
# If we reach here we need to prepare our payload
|
|
token_uri = self.content.get('token_uri', self.default_token_uri)
|
|
service_email = self.content.get('client_email')
|
|
key_identifier = self.content.get('private_key_id')
|
|
|
|
# Generate our Assertion
|
|
now = datetime.now(timezone.utc)
|
|
expiry = now + self.access_token_lifetime_sec
|
|
|
|
payload = {
|
|
# The number of seconds since the UNIX epoch.
|
|
"iat": calendar.timegm(now.utctimetuple()),
|
|
"exp": calendar.timegm(expiry.utctimetuple()),
|
|
# The issuer must be the service account email.
|
|
"iss": service_email,
|
|
# The audience must be the auth token endpoint's URI
|
|
"aud": token_uri,
|
|
# Our token scopes
|
|
"scope": " ".join(self.scopes),
|
|
}
|
|
|
|
# JWT Details
|
|
header = {
|
|
'typ': 'JWT',
|
|
'alg': 'RS256' if isinstance(
|
|
self.private_key, asymmetric.rsa.RSAPrivateKey) else 'ES256',
|
|
|
|
# Key Identifier
|
|
'kid': key_identifier,
|
|
}
|
|
|
|
# Encodes base64 strings removing any padding characters.
|
|
segments = [
|
|
base64.urlsafe_b64encode(
|
|
json.dumps(header).encode(self.encoding)).rstrip(b"="),
|
|
base64.urlsafe_b64encode(
|
|
json.dumps(payload).encode(self.encoding)).rstrip(b"="),
|
|
]
|
|
|
|
signing_input = b".".join(segments)
|
|
signature = self.private_key.sign(
|
|
signing_input,
|
|
asymmetric.padding.PKCS1v15(),
|
|
hashes.SHA256(),
|
|
)
|
|
|
|
# Finally append our segment
|
|
segments.append(base64.urlsafe_b64encode(signature).rstrip(b"="))
|
|
assertion = b".".join(segments)
|
|
|
|
http_payload = _urlencode({
|
|
'assertion': assertion,
|
|
'grant_type': 'urn:ietf:params:oauth:grant-type:jwt-bearer',
|
|
})
|
|
|
|
http_headers = {
|
|
'Content-Type': 'application/x-www-form-urlencoded',
|
|
}
|
|
if self.user_agent:
|
|
http_headers['User-Agent'] = self.user_agent
|
|
|
|
logger.info('Refreshing FCM Access Token')
|
|
try:
|
|
r = requests.post(
|
|
token_uri,
|
|
data=http_payload,
|
|
headers=http_headers,
|
|
verify=self.verify_certificate,
|
|
timeout=self.request_timeout,
|
|
)
|
|
if r.status_code != requests.codes.ok:
|
|
# We had a problem
|
|
logger.warning(
|
|
'Failed to update FCM Access Token error={}.'
|
|
.format(r.status_code))
|
|
|
|
logger.debug(
|
|
'Response Details:\r\n%s', r.content)
|
|
return None
|
|
|
|
except requests.RequestException as e:
|
|
logger.warning(
|
|
'A Connection error occurred refreshing FCM '
|
|
'Access Token.'
|
|
)
|
|
logger.debug('Socket Exception: %s', str(e))
|
|
return None
|
|
|
|
# If we get here, we made our request successfully, now we need
|
|
# to parse out the data
|
|
response = json.loads(r.content)
|
|
self.__access_token = response['access_token']
|
|
self.__refresh_token = response.get(
|
|
'refresh_token', self.__refresh_token)
|
|
|
|
if 'expires_in' in response:
|
|
delta = timedelta(seconds=int(response['expires_in']))
|
|
self.__access_token_expiry = \
|
|
delta + datetime.now(timezone.utc) - self.clock_skew
|
|
|
|
else:
|
|
# Allow some grace before we expire
|
|
self.__access_token_expiry = expiry - self.clock_skew
|
|
|
|
logger.debug(
|
|
'Access Token successfully acquired: %s', self.__access_token)
|
|
|
|
# Return our token
|
|
return self.__access_token
|
|
|
|
@property
|
|
def project_id(self):
|
|
"""
|
|
Returns the project id found in the file
|
|
"""
|
|
return None if not self.content \
|
|
else self.content.get('project_id')
|