There is a requirement in my project to Authenticate user using ADFS at back end without user interaction with ADFS Login Page.Any possible way to achieve it(maybe by Certificate Authentication only)
You could use the WS-Fed active profile (ala WCF).
Or for ADFS 4.0, with OpenID Connect / OAuth you could use client credential flow (typically server to server) where authentication is via knowledge of a secret key.
If from client, use resource owner password flow.
Related
I have implemented web APIs using ado.net and uploaded in hosting, but those web APIs are not secured, anyone can access without login, and now I want to secure them with the role-based authentication how can I secure? I want to do that only a login user can access them.
You can protect your api with token authentication ,In order to acquire a token user would have have to first login in the authentication server ,acquire a token and then call the api.You can assign roles to the user so that the roles are included in token and can be validated when the token validation occurs at api level.
You can use identity server as an identity provider if you dont have a identity provider set up.
When I use ROPC (Resource Owner Password Credential) flow in my App to let users to sign in my App, why I cannot see any sign-in logs in AAD with it?
ROPC is defined in OAuth2 protocol: https://www.rfc-editor.org/rfc/rfc6749#section-1.3.3 and it’s not included in OpenID Connect.
It just likes other flows in OAuth2, they’re designed for protecting API resources, not authenticating users.
The behavior of ROPC in AAD:
For the ROPC flow, user inputs his/her AAD username and password in the client app side. Then the client sends the user’s credential to AAD. It shows as this below picture:
This behavior may cause a main risk: The client may store and upload the user’s AAD credential and used it for other things. It can play as a phishing app to obtain user’s AAD credential.
Generally, in claims-based authentication, clients should just obtain a user’s attributes(E.g. claims in OIDC id_token, SAML token) issued by a trusted IDP to identify the user. Client shouldn’t obtain the user’s credential for other Identity providers.
Why it’s still supported in AAD?
We can see lots of our customers want to use ROPC flow to delegate user permissions to run a job automatically. Some of our customers use ROPC for their own customized login experience.
From Microsoft side, AAD supports ROPC flow as we can really understand it’s necessary in some special scenarios.
So, what kind of app we can use ROPC in it?
All client apps should be public client(Native App) first.
In Microsoft 1 party Apps, like Powershell.
In User’s owned/trusted Apps.
How can we avoid being phished by a 3rd party app which prompts AAD login?
Make sure the page prompts you to input your AAD user credential is AAD login page. You can also check the domain in the URL. It should be start with “https://login.microsoftonline.com/”.
Generally, we shouldn’t input the username and password together in one form. If a 3rd party app asks you to input your AAD username and password in one form, you need to be careful and don’t try to login it via your AAD credential here. Because AAD doesn’t provide any login page to let you enter your user credential in one form currently.
Overall, user login via ROPC flow may be a sign-in event for the client but it’s not a sign-in event for AAD as the user is not signed in AAD.
We have SharePoint on-prem using Kerberos and want to enable external users to connect to our system through WAP.
We like to avoid exposing our SharePoint "directly" to the outside network (pass-through) and not connect WAP in the DMZ with our internal AD domain (Kerberos delegation).
What are our remaining options?
Is ADFS capable of passing a Kerberos token? (it's on the internal network side)
Br,
Tom
The Kerberos protocol is a part of AD. ADFS converts the Kerberos token into a SAML token so you can pass it this way. ADFS provides either a SAML 1.1 or 2.0 token that contains the claims.
The ADFS server turns the Kerberos ticket into a SAML token which gets sent to whoever started the federation flow.
There is a guide for configuring Kerberos with ADFS 2.0 that may be helpful. https://www.cisco.com/c/en/us/support/docs/security-vpn/kerberos/118841-configure-kerberos-00.html
This is not possible. ADFS is only capable of doing Kerberos delegation (turning a saml token into a Kerberos token for the backend) if it's part of the domain.
Is it possible to establish Azure AD SSO/session (with all required cookies) having only Access/ID tokens obtained using ADAL library?
Our scenario is quite similar with one described here:
We have Cordova app with ADAL library as plugin. We managed to authenticate users and get Access/ID tokens using ADAL. Then we initiate SAML SSO between Azure AD and our backend. It works fine the first time user authenticates using ADAL since it's popups microsoft login screen and after successful authentication it establishes a session with Azure AD. But when user logs out our app clears all cookies and next time ADAL gets's tokens from cache and does not provide the login screen which is OK. The problem is that SAML SSO does not work after that since session is gone (no cookies).
I know that ADAL is not quite designed to work with SAML, but maybe there are some dirty or not dirty workarounds to establish session with Azure AD having only access or id tokens?
No, it is not possible.
To get the session cookies, the user must login by themselves.
You can assist the user in logging in to the right account by specifying their AAD tenant id in the authority URI (instead of common), and by specifying login_hint=username#company.com with their user principal name in the authorization call as an extra query parameter.
They should then only need to enter their password (+ MFA etc.)
I have been reading about OAuth, and found that
it roughly performs the following
- client sends request token during redirect to server
- Server displays authorization screen to resource owner
- Resource owner provides uid and pw (not passed to client)
- Server sends access token back to client
- clients then users the Access token to gain access to a
resource
Based on my reding it does not appear that OAuth
does not enable SSO or Federation, but on some
Blogs it implies it does perform SSO
Is this correct or incorrect. Can it perform SSO
without the help of other protocols?
Thanks
Yes it supports SSO with this flow.
We have 2 applications A and B.
The user want to access application A
He is redirected to the identity profider (idp)
He logs in with his credentials.
The idp issues an OAUTH token and a cookie
The client now adds the oauth token to the request for app A and is authorized.
When the client wants to access application B he is again redirected to the idp
In this call to the idp the coockie that the idp had returned in the flow with app A is added.
Because of this the idp immediately returns a token for app B, the client does not have to log in again.
The client gan now access app B with the newly created token.
Hope this exmaple flow makes it more clear.