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@rithvikvibhu
Last active March 18, 2023 04:09
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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.
@rithvikvibhu
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Author

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

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

@cicero200272
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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
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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
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screen1

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

@ArnyminerZ
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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 :)

@Shonke
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Shonke commented Dec 13, 2022

@ArnyminerZ After investigation, i found that this may be related to tls fingerprints. I use this to work for me:
https://github.com/akinazuki/google_aas_et_generate/blob/84c6ca6/aas_et.go#L41

@bagelos
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bagelos commented Mar 6, 2023

Hi
I am getting a weird error running this - whilst trying to resolve goog-home integration with homeassistant.

Ubuntu 22.04 and python 3.11. Latest available @ 2023-Mar-06

Traceback (most recent call last):
File "/home/homeassistant/get_tokens.py", line 70, in
device_id = _get_android_id()
^^^^^^^^^^^^^^^^^
File "/home/homeassistant/get_tokens.py", line 49, in _get_android_id
raise OSError("a valid MAC could not be determined."
OSError: a valid MAC could not be determined. Provide an android_id (and be sure to provide the same one on future runs).

I have used two different app passwords. One where I select Device Other first (and then no option to choose app is available), or app as Other (and then no optiion to choose device).

Versions are :
glocaltokens==0.7.0
gpsoauth==1.0.2
requests==2.28.2
requests-toolbelt==0.10.1
urllib3==1.26.14

If I try a random device_id, I cannot authenticate. Results below.

[] Getting master token...
[!] Could not get master token.
[
] Master token: None

[] Getting access token...
[!] Could not get access token.
[
] Access token: None

thanks
gb

@leikoilja
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@bagelos, this is wrong place for your issue. What you are seeing is the validation error from glocaltokens library. Please open a new issue ticket here https://github.com/leikoilja/glocaltokens

@bagelos
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bagelos commented Mar 6, 2023

thanks. will try that. was wondering if the inablity to pick up MAC address was an issue with this script or not.

@jcarlyle
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thanks. will try that. was wondering if the inablity to pick up MAC address was an issue with this script or not.

This does not seem to be an error from glocaltokens. The call to getmac is an alias for a call to uuid.getnode and getnode is returning a value that is failing the check at line 48. This doesn't seem to involve any calls into glocaltokens.

I tried removing the check and and generating my own 48-bit integer, but I still fail to generate tokens.

Has this script worked for anyone else recently?

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