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tokenleader server can be used by other microservices for token based authentication and authorization

Project description

Please take a note on the change log in the bottom of the document in case you had used a previous version

Quick Start
=============================

docker run -p 5001:5001 bhujay/tokenleader

to run in background

docker run -d -p 5001:5001 bhujay/tokenleader

it is installed with default user use1 and password user1

once it is running install the client in a venv and test the features .
consult the client installation doc https://github.com/microservice-tsp-billing/tokenleaderclient


Manual installation steps
=================================
optional Steps:
-----------------------------------

virtualenv -p python3 venv

source venv/bin/activate

pip install --upgrade pip

installtion:
-----------------------------
pip install tokenleader ( create virtual env if required)

required configurations
========================
create the following directories and files under /etc folder.

1. ssh-keygen < press enter to select all defaults>
2. /etc/tokenleader/tokenleader_settings.ini
3. /etc/tokenleader/role_to_acl_map.yml
4. /etc/tokenleader/client_configs.yml
5. run tokenleader-auth - u <uname> - p <pass> --url localhost:5001



sample configuration of each files
=============================================================================
configure the /etc/tokenleader/tokenleader_settings.ini
=============================================================================

sudo mkdir /etc/tokenleader
sudo vi /etc/tokenleader/tokenleader_settings.ini

[flask_default]
host_name = localhost
host_port = 5001
# ssl not required since the production deployment will be behind the apache with ssl
# This is required only when flask is started without apache for testing
# put enabled for enabling ssl
ssl = disabled
ssl_settings = adhoc

[token]
# default will take the id_rsa keys from the users home directory and .ssh directiry
# put the file name here if the file name is different
#also the public ley need to be copied in the client settings file under /etc/tlclient
private_key_file_location = default
public_key_file_location = default
#use full path when deployed with apache
#private_key_file_location = /home/bhujay/.ssh/id_rsa
#public_key_file_location = /home/bhujay/.ssh/id_rsa.pub

[db]
#change the database string as appripriate for your production environment
#contributors are requested to put some more example here
SQLALCHEMY_DATABASE_URI = sqlite:////tmp/auth.db
SQLALCHEMY_TRACK_MODIFICATIONS = False

/etc/tokenleader/role_to_acl_map.yml
============================================================================================

sudo mkdir /etc/tokenleader
sudo vi /etc/tokenleader/role_to_acl_map.yml

maintain at least one role and one entry in the following format

- name: role1
allow:
- tokenleader.adminops.adminops_restapi.list_users

- name: role2
allow:
- service1.third_api.rulename3
- service1.fourthapi_api.rulename4
/etc/tokenleader/client_configs.yml which holds the non secret configs about the client and looks as
================================================================================================
user_auth_info_file_location: <change this location to users home dir , two files will be generated and stored here>
fernet_key_file: <same as above>
tl_public_key: copy the public key of the server <cat sh/id_rsa.id> and paste the key here

sudo vi
sudo vi /etc/tokenleader/client_configs.yml

user_auth_info_from: file # OSENV or file , leave it as file
user_auth_info_file_location: /home/bhujay/tlclient/user_settings.ini # change this location to users home dir
fernet_key_file: /home/bhujay/tlclient/prod_farnetkeys
tl_public_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCYV9y94je6Z9N0iarh0xNrE3IFGrdktV2TLfI5h60hfd9yO7L9BZtd94/r2L6VGFSwT/dhBR//CwkIuue3RW23nbm2OIYsmsijBSHtm1/2tw/0g0UbbneM9vFt9ciCjdq3W4VY8I6iQ7s7v98qrtRxhqLc/rH2MmfERhQaMQPaSnMaB59R46xCtCnsJ+OoZs5XhGOJXJz8YKuCw4gUs4soRMb7+k7F4wADseoYuwtVLoEmSC+ikbmPZNWOY18HxNrSVJOvMH2sCoewY6/GgS/5s1zlWBwV/F0UvmKoCTf0KcNHcdzXbeDU9/PkGU/uItRYVfXIWYJVQZBveu7BYJDR bhujay@DESKTOP-DTA1VEB
ssl_verify: False # leave it as is
tl_user: user1
tl_url: http://localhost:5001
ssl_verify: False



users authentiaction information . The file is generated using an cli
=================================================================================

tokenleader-auth -p user1

the file , /home/bhujay/tlclient/user_settings.ini , will be auto generated and will looks like this :

[DEFAULT]
tl_password = gAAAAABcYnpRqet_VEucowJrE0lM1RQh2j5E-_Al4j8hm8vJaMvfj2nk7yb3zQo95lBFDoDR_CeoHVRY3QBFFG-p9Ga4bkJKBw==

note that the original password has been encrypted before saving in the file. if the keyfile is lost or the
password is forgotten the file has to be deleted and recreated. Accordingly the users password in the
tokenleader server also to be changed.

TO set up the tokenleqder the following entities need to be registered in sequence
from the root directory of tokenleader, change the name of org , ou , dept , wfc , role and user as per your need
====================================================================================

adminops -h provides help to understand the various options of admin function os tokenleader

adminops initdb

adminops add org -n org1
adminops add ou -n ou1
adminops add dept -n dept1
adminops addwfc -n wfc1 --wfcorg org1 --wfcou ou1 --wfcdept dept1
adminops list wfc -n wfc1
adminops add role -n role1
adminops adduser -n user1 --password user1 --emailid user1 --rolenames role1 --wfc wfc1
adminops addservice -n tokenleader --password tokenleader --urlint localhost:5001

start the service :
==============================================================

tokenleader-start

Test it is working
=======================================================


CLI utilities
====================================================================
using user name and password from config file

tokenleader gettoken

or username and password can be supplied theough the CLI

gettoken --authuser user1 --authpwd user1

Other CLI operaions

tokenleader verify -t <paste the toen here>
tokenleader list user


Python client
======================================================================================
From python shell it works as follows:

from tokenleaderclient.configs.config_handler import Configs
from tokenleaderclient.client.client import Client


this will read the credentials from configurations file. Will be used for CLI.

auth_config = Configs()

the user name and password will be taken from the input but rest of the settings will be from config files.
This will be used for browser based login

auth_config = Configs(tlusr='user1', tlpwd='user1')

Inititialize the client with auth_config

c = Client(auth_config)
c.get_token()
{'message': 'success', 'status': 'success', 'auth_token': 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzUxMiJ9.eyJpYXQiOjE1NDk5NjcxODAsImV4cCI6MTU0OTk3MDc4MCwic3ViIjp7IndmYyI6eyJvcmd1bml0Ijoib3UxIiwibmFtZSI6IndmYzEiLCJkZXBhcnRtZW50IjoiZGVwdDEiLCJpZCI6MSwib3JnIjoib3JnMSJ9LCJlbWFpbCI6InVzZXIxIiwiaWQiOjEsInVzZXJuYW1lIjoidXNlcjEiLCJyb2xlcyI6WyJyb2xlMSJdfX0.gzW0GlgR9qiNLZbR-upuzgHMw5rOm2luV-EnHZwlOSJ-0kJnHsiiT5Wk-HZaqMGZd0YJxA1e9GMroHixtj7WJsbLLjhgqQ5H1ZprCkA9um6-vdkwAFVduWIqIN7S6LbsE036bN7y4cdgVhuJAKoiV1KyxOU1-Hxid5l3inL0Hx2aDUrZ3InzFKBw7Mll86xWdfkpHSdyVjVuayKQMvH2IdT3N15k4O2tSwV3t6UhG6MO0ngHFt3LFR471QWGzJ8UyRzqyqbheuk5vwPk684MfRclCtKx33LWAMf-HXQgVA2py_NzmEiY1ROsKmZqpbIO9YKIO_aFCmzB7DQSI8dcYg', 'service_catalog': {'tokenleader': {'endpoint_url_external': 'localhost:5001', 'endpoint_url_admin': None, 'id': 2, 'endpoint_url_internal': None, 'name': 'tokenleader'}, 'micros1': {'endpoint_url_external': 'localhost:5002', 'endpoint_url_admin': None, 'id': 1, 'endpoint_url_internal': None, 'name': 'micros1'}}}
c.verify_token('eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzUxMiJ9.eyJpYXQiOjE1NDk5NjcxODAsImV4cCI6MTU0OTk3MDc4MCwic3ViIjp7IndmYyI6eyJvcmd1bml0Ijoib3UxIiwibmFtZSI6IndmYzEiLCJkZXBhcnRtZW50IjoiZGVwdDEiLCJpZCI6MSwib3JnIjoib3JnMSJ9LCJlbWFpbCI6InVzZXIxIiwiaWQiOjEsInVzZXJuYW1lIjoidXNlcjEiLCJyb2xlcyI6WyJyb2xlMSJdfX0.gzW0GlgR9qiNLZbR-upuzgHMw5rOm2luV-EnHZwlOSJ-0kJnHsiiT5Wk-HZaqMGZd0YJxA1e9GMroHixtj7WJsbLLjhgqQ5H1ZprCkA9um6-vdkwAFVduWIqIN7S6LbsE036bN7y4cdgVhuJAKoiV1KyxOU1-Hxid5l3inL0Hx2aDUrZ3InzFKBw7Mll86xWdfkpHSdyVjVuayKQMvH2IdT3N15k4O2tSwV3t6UhG6MO0ngHFt3LFR471QWGzJ8UyRzqyqbheuk5vwPk684MfRclCtKx33LWAMf-HXQgVA2py_NzmEiY1ROsKmZqpbIO9YKIO_aFCmzB7DQSI8dcYg')
{'payload': {'iat': 1549967180, 'exp': 1549970780, 'sub': {'username': 'user1', 'roles': ['role1'], 'id': 1, 'email': 'user1', 'wfc': {'orgunit': 'ou1', 'id': 1, 'org': 'org1', 'department': 'dept1', 'name': 'wfc1'}}}, 'message': 'Token has been successfully decrypted', 'status': 'Verification Successful'}



for RBAC configure /etc/tokenleader/role_to_aclmap.yml
============================================================================================

sudo mkdir /etc/tokenleader
sudo vi /etc/tokenleader/role_to_aclmap.yml

maintain atleast one role and one entry in the follwoing format

- name: role1
allow:
- tokenleader.adminops.adminops_restapi.list_users

- name: role2
allow:
- service1.third_api.rulename3
- service1.fourthapi_api.rulename4

from tokenleaderclient.rbac.enforcer import Enforcer
enforcer = Enforcer(c)

Here c is the instance of Client() , the tokenleadercliet which we have initialized in the previous
example of python client.

Now @enforcer.enforce_access_rule_with_token('rulename1') is avilable within any flask application
where tokenleader client is installed.



What it does
===================================================================
tokenleader has three simple operations:
1) recieves users request , autehnticates her and provides a token which carries more users informations such as
a) user's roles ( one user can have multiple roles, although most of the cases one will suffice)
b) user is also mapped with a wfc ( work function context)
wfc is a combination of organization name, organization unit name departname

A typical token request call is :

curl -X POST -d '{"username": "admin", "password": "admin"}' \
-H "Content-Type: Application/json" localhost:5001/token/gettoken

The validity period of the token can be set through the settings.ini in future , currently it is fixed as one hour.

Before a token can be recived , user need to be registered in the token leader server following the steps shown
later section of this docuement.

2) receives a token from user , can validate and unencrypt the users information.

3) maintains a catalog for all the microservies . The entry for services , it includes service name ,
servie account password ( we have to see if this is required at all) , url for the service endpoint.
A client can query tokenleader by service name and will thus get the url for the service .

For each service end point three url can be registered , one for internal , this is the default url .
External url , when you want to segregate the users network from service network
and another is admin network , which can be further separated from the above two network


token can be used for authenticating an user wiithout the need for user to enter password

To verify token:

curl -H "X-Auth-Token:<paste toekn here>" localhost:5001/token/verify_token

tokenleader has a client which is automatically installed with the server , this provides a python api for
making hte call and verifying the token. The client also has the RBAC enforcer for authorization.
read more about the client here -

https://pypi.org/project/tokenleaderclient
https://github.com/microservice-tsp-billing/tokenleaderclient


Why token service and how it works
======================================================================================
in situtaions where a service or a client need to make several http /REST call to an
application/service(microservice)/server or to multiple applications/services/servers,
sending the user name and password repeatedly over the http traffic is not desiarable, neither it is good
to store the user name and password in servers session for a stateless application. In thses cases token based
authentication helps.

Once an user or service obtain a token, subsequent calls to the server or even to different servers can be made
using the token instead of username and password. The server then will make a validation call to tokenleader for
authentication and also will retrieve role name and wfc information.


The information retrieved from the token leader then can be used by the server for granting proper authorization to the
server resources . Therefore authentication is handled by the tokenleader application whereas the authorization is handled
by the applicaion being served to the user.

each application uses a local role to acl map. For each api route there is one acl name which either deny or permits the
http call to the api route . further to control how much data to be given access to the user , the wfc details will be
used for filtering the data query ( mainly data persistance and query)


For the developer
==============================================================================================
For authorization , there is a enforcer decorator to be used by each microservice .
A sample microsdervice with this decoraator has been shown in micros1 repo . Any api route which is bind
with this decorator will retrieve role and wfc from the tokenleader service.
The role will be used by the decorator to compare with the local acl map yml file for allowing or denying the
access to api route url.
The wfc will be passed to the api route function for later usage by the function for database query filtering.
The api route function must have a keyword argument 'wfc' for the enforcer decorator to work.

Example :

@bp1.route('/test1', methods=[ 'POST'])
@authclient.enforce_access_rule_with_token(<'rulename'> )
def acl_enforcer_func_for_test(wfc=None):
'''
the rule name in this case should be :
'pkgname.modulename.classname.acl_enforcer_func_for_test'
for each api route functions the parameter wfc must be present
'''
msg = ("enforcer decorator working ok with wfc org = {},"
"orgunit={}, dept={}".format(wfc.org, wfc.orgunit, wfc.department))

return msg

In the above example, the decorator impose aceess control on the route /test1 .

role name for the user is retrived from the token leader , compared with the rule to acl map yml file
(/etc/tokenleaderclient/role_acl_map_file.yml) which is maintained locally in the server where the service is running .

the role_to_acl_map file maps the api route function names to and looks like :
- name: role1
allow:
- pkgname.modulename1.acl_enforcer_func_for_test
- pkg1.module1.acl_enforcer_func_for_test

check the sample data and test cases inside the tokenleaderclient for better understanding.
tokenleader server ( this repo) it self uses the tokenleader client for enforcing the rbac for
many api routes , for example adding users , listing users etc. Check the
tokenleader/app1/adminops/adminops_restapi.py file to get a better understanding or mail me
your query at bhujay.bhatta@yahoo.com



decorator alos retrived work function context for the user from tokenleader and passed it to
original route function acl_enforcer_func_for_test . The route function mandatorily to have a
parameter called wfc as argument for the wfc , to get the value from the decorator.

now within the acl_enforcer_func_for_test funtion , wfc attributes like org, orgunit and department is used
to display a message. They actually to be used for database query filtering so that based on the work function
user is able to view only relevant information.

List of api routes and their rules
============================================================================
1. /list/users acl rule name - tokenleader.adminops.adminops_restapi.list_users






To check the database objects from shell, and to see that the relational properties are working properly
use the follwoing :
==================================================
/microservice-tsp-billing/tokenleader$ flask shell
from app1.authentication import models
from app1.authentication.models import User, Role, Workfunctioncontext, Organization, OrgUnit, Department
r1 = Role.query.filter_by('role1').first()
r1 = Role.query.filter_by(rolename='role1').first()
r1
#<Role role1>




To generate token using curl :
===================================================

curl -X POST -d '{"username": "admin", "password": "admin"}' \
-H "Content-Type: Application/json" localhost:5001/token/gettoken

what you get from tokenleader:
========================================

{'service_catalog': {
'microservice1': {'id': 1,
'name': 'microservice1',
'endpoint_url_external': 'localhost/5000',
'endpoint_url_admin': 'localhost/5000',
'endpoint_url_internal': 'localhost/5000'}},
'message': 'success',
'auth_token': 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzUxMiJ9.eyJpYXQiOjE1NDk4Njg5MDYsInN1YiI6eyJpZCI6MSwiZW1haWwiOiJ1MUBhYmMuY29tIiwicm9sZXMiOlsicm9sZTEiXSwid2ZjIjp7ImlkIjoxLCJuYW1lIjoid2ZjMSIsIm9yZyI6Im9yZzEiLCJvcmd1bml0Ijoib3UxIiwiZGVwYXJ0bWVudCI6ImRlcHQxIn0sInVzZXJuYW1lIjoidTEifSwiZXhwIjoxNTQ5ODcyNTA2fQ.BBtTUcu8kUz__sbHmC8sB111C4Yzk6Fth5DjOoLCCTygqDjj-gQOS3x6T7e8rpKmHtf0LrDWPWFCmhIIqD2I8DuK4U4b-Hk7gbKYIVsvqL3DksOVF2SSe_6v4nNbJR50Q8mYrYQz0yijj-KQHj0Gc1FVCaBSXeIbA-uAUmSpQKCBDRqJbayK85e4dSoILpKL_Q1_JT4qqM7OwnGq05akJrosohNGKxp46gBex9l5iTPkoRgvQk-p1H61MMTdLKZIr9CmjIReXBBzfla6LoX8Siur_Lb4o1r0PJUcok-w69h_QCEqLe9VX9e4zFWnXIpDj5nwKqnj0JRKNvMw5VTcHA',
'status': 'success'}



To verify token:
================================================

curl -H "X-Auth-Token:<paste toekn here>" localhost:5001/token/verify_token

How the verified toekn data looks like :
===========================================================================

{
"message": "Token has been successfully decrypted",
"payload": {
"exp": 1549382308,
"iat": 1549378708,
"sub": {
"email": "u1@abc.com",
"id": 1,
"roles": [
"role1"
],
"username": "u1",
"wfc": {
"department": "dept1",
"id": 1,
"name": "wfc1",
"org": "org1",
"orgunit": "ou1"
}
}
},
"status": "Verification Successful"
}



for initial setup or when db model is changed
===================================================================
for db migration

flask db init
flask db migrate -m < COMMENT >
flask db upgrde

if there is a change in db structure, and a migration is done , commit and push the migration directory to the git
from the machine where migration was done.

For development machine with sqllite db , there are chalenges in migration due to lil8mitiaton of database
alter capabilities inherent to sqllite. So sometimes , delelting the migration folder and and recreating a
fresh migartion helped.




Deployment
===========================================

sudo apt-get install -y apache2 apache2-dev

sudo su

source venv/bin/activate

pip install mod_wsgi

mod_wsgi-express module-config

mod_wsgi-express install-module

this will print the folowing lines :
LoadModule wsgi_module "/usr/lib/apache2/modules/mod_wsgi-py35.cpython-35m-x86_64-linux-gnu.so" - copy this to wsgi.load
WSGIPythonHome "/mnt/c/mydev/microservice-tsp-billing/tokenleader/venv" copy this to wsgi.conf

vi /etc/apache2/mods-available/wsgi.conf

vi /etc/apache2/mods-available/wsgi.load

cd /etc/apache2/mods-enabled/

ln -s ../mods-available/wsgi.conf wsgi.conf

ln -s ../mods-available/wsgi.load wsgi.load

sudo a2enmod ssl

sudo mkdir /etc/apache2/ssl

sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
-keyout /etc/apache2/ssl/tokenleader-apache-server.key \
-out /etc/apache2/ssl/tokenleader-apache-server.crt


apachectl configtest

download the copy of app.wsgi file and copy it in /var/www
download the tokenleader-apache.conf , place it in /etc/apache2/sites-enabled/ and modify the
directories and the username

start the apache service

sudo service apache2 start





https://pypi.org/project/mod_wsgi/

important note : https://modwsgi.readthedocs.io/en/develop/user-guides/virtual-environments.html
===========================




development
===========================================================

Testing
===========================================================================
clone from git and then run

python -m unittest discover tests

to run single unit test

python -m unittest tokenleader.tests.unittests.test_admin_ops.TestAdminOps.test_abort_delete_admin_user_input_not_yes

for token generation and verification testing this is a useful test

python -m unittest tokenleader.tests.test_auth.TestToken.test_token_gen_n_verify_success_for_registered_user_with_role


to test the db operation :
========================================================================================

(venv) bhujay@DESKTOP-DTA1VEB:/mnt/c/mydev/microservice-tsp-billing/tokenleader$ flask shell

from app1 import db
from app1.authentication.models import User, Role
r1 = Role(rolename='role1')
db.session.add(r1)
db.session.commit()

u = User(username='john', email='john@example.com')
db.session.add(u)
db.session.commit()
u = User.query.filter_by(username='john').first()
u
#<User john>
u.roles
#<sqlalchemy.orm.dynamic.AppenderBaseQuery object at 0x7fb94faa2e48>
u.roles=[r1]
db.session.commit()
u.roles
#<sqlalchemy.orm.dynamic.AppenderBaseQuery object at 0x7fb94fa8bf98>
for l in u.roles:
print(l.rolename)

#role1


1)operation scope filtering based on users org, div, dept details
Todo:
role and wfc shd not have any relation - done
user can have only one wfc - done
user to dict now gives wfc dictionary as well

tesing to be done/changes to that affect - upto verification unit test is passed


workcontext to be instantiated as a class

workcontext to be made avilable to api route function when required

ext important works:

2) centralized catalogue for all microservice endpoints and
3) client for tokenleader


change log
================================================

ver 1.5
----------------
tokenleader 0.70 and few fixes

ver1.3
-------------
1. migration/version was missing
2. Sample config files created under etc directory in source code

ver 1.1
-------------

1. all configs are in /etc/tokenleader
2. tlclient command changed to tokenleader
3. tlconfig command changed to tokenleader-auth

ver 1.0
----------------
setting FLASK_APP during db init


ver 0.8 / 0.9
------------------
1. added adminops initdb command for applying the changes in database schema

ver 0.7
--------------
1. tokenleaderclient bug resolved in client version 0.64

ver 0.6
--------------
1. check presence of required parameters in /etc/tokenleader/tokenleader_settings.ini while starting the service

ver 0.5
------------------
1. introduction of /etc/tokenleader/tokenleader_settings.ini for hostname, port etc.
2. tokenleader-start to start the service
3. service can be started with ssl - although this will be mostly done by a nginx or apache in a production setup.

Project details


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1.8

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