Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Get tokens for Google Home Foyer API

Get tokens for Google Home Foyer API

Intro

This script (python 3) generates tokens that can be used when making requests to the Google Home Foyer API. There are 2 kinds of tokens used here:

  1. Master token - Is in the form aas_et/*** and is long lived. Needs Google username and password.
  2. Access token - Is in the form ya29.*** and lasts for an hour. Needs Master token to generate.

If you do not want to store the Google account password in plaintext, get the master token once, and set it as an override value.

It's safer/easier to generate an app password and use it instead of the actual password. It still has the same access as the regular password, but still better than using the real password while scripting. (https://myaccount.google.com/apppasswords)

Usage

# Install python requirements
pip install gpsoauth

# Update the constants at the beginning of the file

# Get the tokens!
python3 get_tokens.py
# Get tokens for Google Home Foyer API
# https://gist.github.com/rithvikvibhu/952f83ea656c6782fbd0f1645059055d
from gpsoauth import perform_master_login, perform_oauth
from uuid import getnode as getmac
# Creds to use when logging in
USERNAME = '<google_username>'
PASSWORD = '<google_password_or_app_password>'
# Optional Overrides (Set to None to ignore)
device_id = None
master_token = None
access_token = None
# Flags
DEBUG = False
def get_master_token(username, password, android_id):
res = perform_master_login(username, password, android_id)
if DEBUG:
print(res)
if 'Token' not in res:
print('[!] Could not get master token.')
return None
return res['Token']
def get_access_token(username, master_token, android_id):
res = perform_oauth(
username, master_token, android_id,
app='com.google.android.apps.chromecast.app',
service='oauth2:https://www.google.com/accounts/OAuthLogin',
client_sig='24bb24c05e47e0aefa68a58a766179d9b613a600'
)
if DEBUG:
print(res)
if 'Auth' not in res:
print('[!] Could not get access token.')
return None
return res['Auth']
def _get_android_id():
mac_int = getmac()
if (mac_int >> 40) % 2:
raise OSError("a valid MAC could not be determined."
" Provide an android_id (and be"
" sure to provide the same one on future runs).")
android_id = _create_mac_string(mac_int)
android_id = android_id.replace(':', '')
return android_id
def _create_mac_string(num, splitter=':'):
mac = hex(num)[2:]
if mac[-1] == 'L':
mac = mac[:-1]
pad = max(12 - len(mac), 0)
mac = '0' * pad + mac
mac = splitter.join([mac[x:x + 2] for x in range(0, 12, 2)])
mac = mac.upper()
return mac
if not device_id:
device_id = _get_android_id()
print('''
This script generates tokens that can be used when making requests to the Google Home Foyer API.
There are 2 kinds of tokens used here:
1. Master token - Is in the form `aas_et/***` and is long lived. Needs Google username and password.
2. Access token - Is in the form `ya29.***` and lasts for an hour. Needs Master token to generate.
If you do not want to store the Google account password in plaintext,
get the master token once, and set it as an override value.
It's safer/easier to generate an app password and use it instead of the actual password.
It still has the same access as the regular password, but still better than using the real password while scripting.
(https://myaccount.google.com/apppasswords)
''')
print('\n[*] Getting master token...')
if not master_token:
master_token = get_master_token(USERNAME, PASSWORD, device_id)
print('[*] Master token:', master_token)
print('\n[*] Getting access token...')
if not access_token:
access_token = get_access_token(USERNAME, master_token, device_id)
print('[*] Access token:', access_token)
print('\n[*] Done.')
MIT License
Copyright (c) 2020 Rithvik Vibhu
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
@leikoilja

This comment has been minimized.

Copy link

@leikoilja leikoilja commented Dec 28, 2020

Great stuff, thank you!

Had a bit of an issue showing "Bad Authentication" while the passwords were right and it turned out that gpsoauth needs explicitly requests==2.23.0 version

@rithvikvibhu

This comment has been minimized.

Copy link
Owner Author

@rithvikvibhu rithvikvibhu commented Dec 28, 2020

Ah yeah, great that that worked. For others with Bad Authentication issues, check out rithvikvibhu/GHLocalApi#54

@leikoilja

This comment has been minimized.

Copy link

@leikoilja leikoilja commented Dec 28, 2020

@rithvikvibhu, is there a way to implement grpcurl -H 'authorization: Bearer ... command in python so it would receive the list of devices in python? I would really want to make one file containing all token extraction, so I could use it autonomously.

@rithvikvibhu

This comment has been minimized.

Copy link
Owner Author

@rithvikvibhu rithvikvibhu commented Dec 28, 2020

Yeah it should be possible the regular way. https://grpc.io/docs/languages/python/basics/. The only thing to take care of is adding the auth header.

Use the same .proto files and create a python client. If possible, maybe you can even publish it as a package (including the token extraction, etc. like you mentioned)!

@leikoilja

This comment has been minimized.

Copy link

@leikoilja leikoilja commented Dec 29, 2020

Thank you, @rithvikvibhu.

I have written a small script in python that is extracting the local authentication tokens.
https://github.com/leikoilja/glocaltokens.

If helpful you can maybe include it in the https://rithvikvibhu.github.io/GHLocalApi/ documentation :)

@rithvikvibhu

This comment has been minimized.

Copy link
Owner Author

@rithvikvibhu rithvikvibhu commented Dec 29, 2020

That's awesome 💯! Will try it out soon and link to it from this gist and on the website.

@leikoilja

This comment has been minimized.

Copy link

@leikoilja leikoilja commented Dec 30, 2020

@rithvikvibhu, yay, managed to pack it into the python package. Thanks for the help.
All the testing are much appreciated

@cicero200272

This comment has been minimized.

Copy link

@cicero200272 cicero200272 commented Jan 7, 2021

I am requested to log in (using a browser) first. When I copy & paste the URL to a browser window, I can provide my credentials, but then I am stuck on a "One moment please..." page which does not reload. Does anybody else have this kind of problem?

@rithvikvibhu

This comment has been minimized.

Copy link
Owner Author

@rithvikvibhu rithvikvibhu commented Jan 8, 2021

Not sure what you mean @cicero200272. Which URL did you copy? This script doesn't need any browser or a website to visit at all.

@cicero200272

This comment has been minimized.

Copy link

@cicero200272 cicero200272 commented Jan 8, 2021

screen1

@rithvikvibhu

This comment has been minimized.

Copy link
Owner Author

@rithvikvibhu rithvikvibhu commented Jan 9, 2021

@cicero200272 Let's move to an issue rithvikvibhu/GHLocalApi#71

@ArnyminerZ

This comment has been minimized.

Copy link

@ArnyminerZ ArnyminerZ commented Jan 29, 2021

Thank you, @rithvikvibhu.

I have written a small script in python that is extracting the local authentication tokens.
https://github.com/leikoilja/glocaltokens.

If helpful you can maybe include it in the https://rithvikvibhu.github.io/GHLocalApi/ documentation :)

Just wanted to thank you very much for your work. Loading the device's JSON had me crazy for some days :)

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment