MS Identity Python Common

This repository contains a set of code that is shared amongst the various Python samples for the Microsoft Identity Platform. This is a work in progress and we'd love to hear your feedback, comments and contributions.

Features

The code present makes available or aims to make available the following features to the developers:

• Allow for (but not require) automatic Flask/Django/other framework integration (implemented)
• Allow for (but not require) automatic endpoint protection (implemented)
• Catch AAD errors and handle them properly, e.g.:
  • password reset flow and edit profile flow (implemented)
  • insufficient / incremental consent (needs implementation)
• Token cache handling (implemeted)
• authN enforcement by decorator (implemented)
• Allow multiple identity sessions per user browser session (i.e., multiple logged in users in one browser session) (not yet implemented)
• Abstract authN and authZ implementation details away from developer (implemented)
• authZ enforcement by decorator (not yet implented)

Getting Started

Prerequisites

• Python 3.8
• A virtual env for your own webapp project
• A flask project or django project (impelemented) or other web framework (not yet implemented) or desktop app (not yet implemented)

Installation

1. Activate a virtual environment

Linux/OSX:

Open a terminal and type the following:

# go to your web app directory on dev machine
cd your-flask-app-root-directory
python3 -m venv path-to-venv # only required if you don't have a venv already
# activate your virtual env
source path-to-venv/bin/activate

Windows:

Open a terminal and type the following:

# go to your web app directory on dev machine
cd your-flask-app-root-directory
python3 -m venv path-to-venv # only required if you don't have a venv already
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope Process -Force
. path-to-venv\Scripts\Activate.ps1
pip install -r requirements.txt

2. Now install the utils:

Use only one of the following two options:

• via https://

pip install git+https://github.com/azure-samples/ms-identity-python-samples-common

• via ssh://

pip install git+ssh://git@github.com/azure-samples/ms-identity-python-samples-common

3. copy a config template (e.g. aad.config.json) from the repo and in to your project root dir, and fill in the details

Quickstart (Flask)

don't forget to import the required modules into your application as necessary:

from ms_identity_web import IdentityWebPython
from ms_identity_web.adapters import FlaskContextAdapter
from ms_identity_web.configuration import AADConfig

hook up the utils to your flask app:

adapter = FlaskContextAdapter(app)    # we are using flask
ms_identity_web = IdentityWebPython(AADConfig.parse_json('aad.config.json'), adapter) # instantiate utils

add the @ms_identity_web.login_required decorator to protect your routes:

@app.route('/my_protected_route')
@ms_identity_web.login_required # <-- developer only needs to hook up this decorator to any login_required endpoint like this
def my_protected_route():
    return render_template('my_protected_route.html')

Demo

see: https://github.com/azure-samples/ms-identity-python-flask-tutorial or https://github.com/azure-samples/ms-identity-python-django-tutorial for a demo with any of the apps there

Project Structure

init.py

• main common code API is here.

adapters.py

• FlaskContextAdapter for handling interaction between the API and flask context (e.g. session, request)
• An ABC defining the interface for writing more adapters
• Should be re-organised into folders on a per-framework basis?

flask_blueprint

• a class that implements all aad-specific endpoints. support for multiple instances with different prefixes if necessary
• all bindings are automatic with flaskcontextadapter

django adapter

• django.adapter is used to integrate with Django apps
• need to use django.middleware as middleware in Django apps

django endpoints

• django.msal_views_and_urls.py implements all aad-specific endpoints. support for multiple instances with different prefixes if necessary

context.py

• IdentityContext class that holds ID-specific info (simple class with attributes and has_changed function for write-to-session decision)

configuration.py

• simple configuration parser and sanity checker

constants.py

• AAD constants

errors.py

• AAd error classes

Resources