I'm trying to implement openid login with Django and having some trouble. The library I'm trying to use now is Django-openid-auth. I haven't found any django+openid libraries that have much documentation. How can I actually go about using this as a login and store the information I need for my app based on the users that come in from openid? How does this store the information shared from the openid provider and does this library already store it?
The OpenID identity verification process most commonly uses the
following steps:
The user enters their OpenID into a field on the consumer'ssite, and hits a login button.
The consumer site discovers the user's OpenID provider using
the Yadis protocol.
The consumer site sends the browser a redirect to the OpenID
provider. This is the authentication request as described in
the OpenID specification.
The OpenID provider's site sends the browser a redirect back to
the consumer site. This redirect contains the provider's
response to the authentication request.
your web app needs to keep track of:
-the user's identity URL and the list of endpoints discovered for
that URL
-State of relationships with servers, i.e. shared secrets
(associations) with servers and nonces seen on signed messages.
This information should persist from one session to the next
and should not be bound to a particular user-agent.
hope this helps:D
Related
I have a website with frontend in AngularJS and backend in Python.
Currently we are presenting the user with a simple webform to fetch credentials.
The credentials from the form are sent to the Python backend(flask webservice)(this is a basic auth mechanism).
Now we would like to enable Single Sign on (SSO) on the website.Our identity provider is Pingone or Ping Federate.
I am starting from scratch here..with no prior knowledge of SAML or SSO.
I would like to know which path to take?
Which libraries to use and more importantly,how to use them?
At this point in time I am not sure how exactly SAML identifies a user and then authenticates him/her.
The basic exchange of SAML starts with a user asking for a resources (page, SPA app) on your Python server. The server determines if the user is already authenticated (has a session, JWT token, etc), and if not, creates a SAML request token to be sent via a redirect to the Identity Provider (use a library for this).
The identity provider verifies the SAML request token via digital signature. Once the token is verified, the user is asked to log in (if they are not already authenticated there). Once the user is authenticated, the identity provider creates a SAML request token which is presented back at your server via a redirect.
Upon receipt of the SAML request token, your server validates the token via digital signature, and you treat the user as logged in (again, use a library for this part). The token will minimally identify the user, but can contain authorizations and additional info. At this point your user is authenticated and you would create a session on your server or you create a JWT token to identify your user from within your angular app to the Python backend.
Creating the SAML request token and processing in the resultant SAML response token is not trivial. As suggested above, use a library, preferably one that has been through the the test of time. I'm not a Python dev, but I found this with some googling: onelogin/python-saml.
Wikipedia has a nice sequence diagram to demonstrate this and of course you can peruse the many docs on the Oasis SAML docs website.
Good luck with the implementation. I've done it a couple times in Java.
Hi I have our website running on appengine with flask as backend framework and we have built our authentication and session management using libraries Flask-OAuth, Flask-Login.
But now I have a requirement to use firebase for authentication.
I am able create sample applications following firebase tutorials but I do no how to integrate with existing application.
In Firenotes samples provided by firebase team they are using two separate services frontend and backend.
I thought of using firebase code in login.html page and once client authenticated pass the info to /profile url -> log the user_id in database and login-user using Flask-Login.
I am not sure whether the above flow is correct and I am not to ensure that it is correct one without any problems in future.
Please help with any ideas as I need to implement it very soon!!
Flask-Login uses session based authentication. Clients login using an authentication scheme. Since you are using Flask-OAuth, it's the oauth flow. If the user successfully authenticates, Flask-Login sends a response during the token exchange step setting an HTTP only cookie (meaning javascript can't access it) with a token unique to the user session. The client then authenticates future requests for the duration of the session with that token. The server can invalidate the session at any time, forcing the client to log in again.
Meanwhile, firebase authentication is JSON Web Token (JWT) authentication scheme. After completing the login flow, the firebase API retrieves a JWT from google's application servers.
To authenticate requests, you need to transmit that JWT on EVERY request. Your server MUST also validate the JWT to ensure that it is both valid and unexpired.
You'll note that the manner by which the JWT arrives at the server is unspecified by the firebase SDK and libraries. I recommend using a Authentication: JWT <google's jwt> header.
One way to resolve your question would be to use the JWT to complete the initial login flow, and then rely on session based auth from there. You'd set up a login endpoint that expects and validates a JWT, and responds with the set cookie header. From that point forward you continue using your flask-login provided session based auth.
Google actually has an example of this in their documentation: https://firebase.google.com/docs/auth/admin/manage-cookies
I'm looking to set up Django to use OAuth2 to authenticate users for a service that I'm running, but I'm having a bit of difficulty understanding how the tokens are passed around.
I've been working my way through this tutorial: https://django-oauth-toolkit.readthedocs.org/en/0.7.0/tutorial/tutorial_01.html. I've been able to get a server up and running as the OAuth provider, and it seems to be working as it should. I'm able to log in to it and set up an application. The difficulty I'm having is figuring out how the various tokens are passed around.
Suppose that my OAuth provider is sitting on one server - let's call this Provider.com - and my service that I'm wanting authenticated is on service.com. When a user first tries to make a request to the service, they first need to authenticate against the Provider. So they click on a login button which directs them to Provider.com. They enter their credentials. If everything is set up correctly on the server, they should be presented with a prompt that gives them a chance to allow or deny Service.com from accessing their account on Provider.com. Supposing that they click Allow, they are then redirected to Service.com, and are given a token. On future calls to Service.com, they pass in the token, and are, in theory, able to make authenticated calls.
The problem I'm having understanding is this: At what point do the Provider and the Service communicate? If a call comes in to the Service, how does it know that the authentication token passed in with the call is valid? There's know way it could know that a particular token is valid unless: A) it recognizes that same token from a previous call which was also authenticated or B) it talks to the OAuth 2 provider and verifies the authenticity of the token.
A diagram like the one found here shows the process in the browser:
At the end of this, it has the Client App sending the authentication code, client id, and client secret to the OAuth2 provider. In the previously mentioned tutorial, it isn't really clear how this is actually done. In the tutorial, the provider and the service are on the same machine, and it would appear that they also share the same database.
This this brings about my question: How does one host a Django-based OAuth provider on a separate server than the resource/service being accessed? Is this possible?
From this other post, it indicates that this might not be possible: https://stackoverflow.com/a/26656538/1096385 Is that indeed the case, at least with the existing Django OAuth2 provider framework?
It depends on the oauth2 flow you're using. It seems like you're using authentication code.
In that case:
service.com sends the browser to provider.com for user authentication (uri contains service.com client_id and redirect_uri)
User authenticates on provider.com, then the browser is redirected to service.com's redirect_uri with a ?code parameter.
On your server side, handle this code parameter and ask for a token with it.
See https://aaronparecki.com/articles/2012/07/29/1/oauth2-simplified#web-server-apps
I have an existing webapp, running in Python on App Engine, in which users can login through open-id using a Yahoo account. Now, once they're signed in, I'd like them to be able to access their Yahoo contacts, through OAuth. I'm working though the Yahoo Python SDK and am just stuck.
I have the consumer key, consumer secret, app ID, and the callback URL is the same page, the use leaves from. Going to the Yahoo login pages seems to work fine and the user comes back to my site with an auth_token and auth_verifier. What do I do with those? Which strings do I need to store for future requests? Is there good sample code anywhere for these kinds of requests? Thanks.
You should look for OpenID+Oauth Hybrid protocol.
OpenID+OAuth Hybrid protocol lets web developers combine an OpenID request with an OAuth authentication request.
This extension is useful for web developers who use both OpenID and OAuth, particularly in that it simplifies the process for users by requesting their approval once instead of twice.
The goal of OAuth is to acquire an
access token from Google, which can
then be used to exchange user-specific
data with a Google service (such as
calendar information or an address
book). The regular OAuth process is a
four-step sequence: (1) ask for a
"request" token, (2) ask for the token
to be authorized, which triggers user
approval, (3) exchange the authorized
request token for an "access" token,
and (4) use the access token to
interact with the user's Google
service data. For a more detailed
description, see OAuth for Web
Applications.
With OpenID+OAuth, this sequence
remains essentially the same. The
difference is that getting an
authorized OAuth request token (steps
1 and 2) is wrapped up in the OpenID
authentication request. In this way,
the user can approve login and service
access at the same time.
Here a demo and source code (php) of Hybrid protocol using Google.
Here and here the Yahoo documentation to combine an OpenID authentication request with the approval of an OAuth request token.
Can anyone explain me steps using openid library which is mentioned here.
I have import all package of janrain openid in my programe but I cant understand actual flow of code.
The process should basically follow this plan:
Add an OpenID login field somewhere on your site. When an OpenID is entered in that field and the form is submitted, it should make a request to the your site which includes that OpenID URL.
First, the application should instantiate a Consumer with a session for per-user state and store for shared state. using the store of choice.
Next, the application should call the 'begin' method on the Consumer instance. This method takes the OpenID URL. The begin method returns an AuthRequest object.
Next, the application should call the redirectURL method on the AuthRequest object. The parameter return_to is the URL that the OpenID server will send the user back to after attempting to verify his or her identity. The realm parameter is the URL (or URL pattern) that identifies your web site to the user when he or she is authorizing it. Send a redirect to the resulting URL to the user's browser.
That's the first half of the authentication process. The second half of the process is done after the user's OpenID Provider sends the user's browser a redirect back to your site to complete their login.
When that happens, the user will contact your site at the URL given as the return_to URL to the redirectURL call made above. The request will have several query parameters added to the URL by the OpenID provider as the information necessary to finish the request.
Get an Consumer instance with the same session and store as before and call its complete method, passing in all the received query arguments.
There are multiple possible return types possible from that method. These indicate the whether or not the login was successful, and include any additional information appropriate for their type.
web.py includes a webopenid module that implements a complete, if basic, OpenID authentication system using the Janrain. Using the included host class, you can add OpenID-backed authentication to your project. To actually pull interesting data from the OpenID provider, though, you'll need to add AX and SReg request/response handling.