As far as I know, Exchange does support WS-Federation, but it does not support SAML. At the same time I have IDP that does support SAML, but does not support WS-Federation.
Is it possible to configure ADFS as proxy? For example: Exchange OWA/ECP -> redirect to ADFS using WS-Fed -> and ADFS speaks to IDP using SAML -> user is getting transparently authenticated using IDP?
Thank in advance.
• AFAIK, if you are configuring Exchange on premises mail server, then you must have AD in your environment, thus, when Exchange OWA/ECP forwards requests to ADFS, those will be purely using WS-Fed protocol or internal Kerberos authentication protocol. So, if you want to forward credentials from the ADFS to the third-party SaaS platform, then a relying party trust must be formed with that IdP to which SAML token are supported.
• Thus, you should create a SAML 2.0 provider supporting RPT with the IdP platform (3rd party) in ADFS for SAML supported authentication. Though, you can’t authenticate claims with the 3rd party IdP by forwarding through ADFS but can send the claim tokens as authenticated attributes to the other IdP.
• Therefore, what you are asking is not possible as Exchange ECP passing claims to ADFS in WS-Fed and then forwarding them to the IdP in SAML supported token as ADFS doesn’t support forwarding the identities to other IdP for authentication or transforming the credentials protocol from WS-Fed to SAML.
Please find the below link for more details: -
https://techcommunity.microsoft.com/t5/core-infrastructure-and-security/adfs-deep-dive-comparing-ws-fed-saml-and-oauth/ba-p/257584
For configuration of SAML 2.0 service provider in ADFS, please refer the link below: -
https://learn.microsoft.com/en-us/powerapps/maker/portals/configure/configure-saml2-settings
Related
Is SAML an authentication mechansim. ? I have seen this being written in many places.
As per my understanding SAML is not an authentication mechanism but a way to exchange authentication and authorization data between a service provider and an identity provider. ?
Both Service provider and identity provider have to be SAML compliant or basically understand SAML to take part.
Authentication can be done by any means like oAuth, Form etc. and then SAML exchange happens.
Best Regards,
Saurav
Actually SAML is a internet standards based technology to achieve web-based single on.
The actual authentication, which happens at the SAML IdP is out of scope of the specification.
However sometimes implementors do no accurately distinguish between SSO and authentication.
Chapter 1 from SAML Technical Overview, a document published in 2008 and still a good read:
The Security Assertion Markup Language (SAML) standard defines a
framework for exchanging security information between online business
partners.
...and then Chapter 4 in the same doc
SAML consists of building-block components that, when put together,
allow a number of use cases to be supported. The components
primarily permit transfer of identity, authentication, attribute, and
authorization information between autonomous organizations that have
an established trust relationship
SAML (Security Assertion Markup Language) is an identity federation protocol.
(1) Traditionally a web application utilizes a local data storage (such as MySQL which is used to store username/password credentials) to accomplish the login authentication.
On the other hand, a web application can leverage a third-party SAML Identity Provider (IdP) to accomplish the login authentication if the web application has been integrated with a SAML Service Provider (SP).
(2) Usually a SAML IdP utilizes identity repository (such as OpenLDAP) to provide identity authentication for a SAML SP-enabled web application.
(3) A web application, which has been integrated with a SAML SP, outsources login authentication to a SAML IdP.
Without loss of generality, we assume that the SAML IdP has been configured with OpenLDAP.
A typical SAMP SP-intitiated authentication procedure can be described below.
(I) A user launches a web browser to access a SAML SP-enabled web application.
(II) The user is redirected to a SAML IdP which will prompt username/password login screen.
SAML SP sends a SAML request to SAML IdP.
(III) The user submits the username/password credential.
(IV) The SAML IdP leverages OpenLDAP to validate the username/password credential.
(V) The user is redirected back and logged in to the web application if the user has been authenticated by OpenLDAP successfully.
SAML IdP sends a SAML response token to federate the user identity (such as username) to SAML SP-enabled web application.
(4) How to build and run Shibboleth SAML IdP and SP using Docker container demonstrates how a SAML IdP utilizes OpenLDAP to provide identity authentication and then federates the user identity (such as username) to a SAML SP-enabled web application, thus accomplishing the login authentication for the web application.
I have an internal application hosted on AWS with https. I need help understanding how to implement SAML authentication to my web application. I am using Spring Boot for my backend and AngularJS for my front end. I am using ADFS as my IP. From what I gather, the following are the steps.
Get a https URL for your application
Create a basic ADFS trust.
Add the roles on ADFS
Get a metadata URL and enter it in your application.properties.
I am trying to implement SAML for the first time and have confused myself completely. Any thoughts shared would be greatly appreciated.
Your Spring Boot application needs to be a Service Provider (SP) that trusts your ADFS Identity Provider (IdP) and you ADFS IdP needs to trust your SP. This trust is usually done using the SAML2 metadata profile, i.e. the SP and IdP SAML2 metadata files.
You can either design your application as a 'standalone', i.e. no SAML ability and put something in front of it that understand SAML and blocks all requests until the IdP sends attributes. This is how the standard Shibboleth SP works but it needs Apache. The other option is to use the framework to plumb in the SAML capability such as Spring Security SAML
We want to setup ADFS 3.0 to enable OAuth2 based authentication. I have read lots of documentation, but am still unclear if this is supported.
Can ADFS be used as an authorization server for oauth, or is oauth2 support in ADFS only meant to work as a client to another authorization server?
Any help for setting up adfs as oauth provider/server is appreciated.
in ADFS 2012R2 (aka ADFS 3.0), we only support the authorization grant flow. The only scenario is for public clients (say a mobile app on iOS/Android/Windows) to access a RESTful service and authorizing via JWT tokens. You can see this at https://msdn.microsoft.com/en-us/library/dn633593.aspx
With ADFS 2016 (which will release imminently), you have the full Oauth/OIDC support. With this you can build web apps, single page apps, API's, multi-tiered app systems that require On-behalf-of support, confidential clients (with support for windows service accounts acting as confidential clients). You can check this out https://technet.microsoft.com/en-us/windows-server-docs/identity/ad-fs/ad-fs-development
I have a more theoretical question about AD FS. If I use it as a STS (Security token service) for accessing some internal company information from outside of private company network (over internet), using Claim-based authentication, can I decide exactly what credentials will be used for authentication or is it pre-set by Active Directory policies? To be more accurate, could I authenticate form a device that is not registered in AD?
If you want to authenticate against ADFS from outside the corporate domain, you should install the ADFS proxy in your DMZ.
ADFS can be used to authenticate users against the Active Directory domain it is installed in, or trust tokens coming from a federated STS.
So, if you have a web application that trusts tokens issued by ADFS, you can use security protocols like WS-Federation, WS-Trust or OAuth 2.0 (in ADFS 3.0) to get a token from ADFS and use it to authenticate against your web application.
Device registration is not required to use these protocols.
HTH.
Premise:
I have an infrastructure where we have a custom RP-STS implemented with Windows Identity Foundation, providing SSO for a few websites. This STS communicates with the sites via WSFederation. This custom STS is about to be deprecated because the organization is adding an Open ID Connect Idp into the infrastructure.
The websites themselves (Episerver) contain all the custom made authorization logic already based on the claims the STS provides, and if we were to simply toss the STS we'd have to replace all of this logic.
Question:
What is the browser redirect flow to integrate our RP-STS to the openId connect provider in such a way that the end user browser gets a session for both our RP STS and the Open Id Connect IdP?
Personal thinking on how it might be doable (based on massive assumptions on how openid connect works), skip this if you know how to answer:
Website sends HTTP post to RP-STS containing username/password
RP STS responds to browser with redirect to OpenId Connect Idp (Redirect contains username / password, and a replyto address is set to the RP STS)
OpenId Connect Idp creates a local session (???) and responds with a redirect to RP STS, redirect contains auth_token. (I'm unsure of the parts that go into an openid connect login flow)
RP STS receives user token and gets / asks for user data, builds claims and builds local session
RP STS sends claims in SAML token via WSFed to RP site
Am I even close?
Further clarification:
I do not want to remove the existing STS, but abstract the new infrastructure change behind it so that from the end-user-sites perspective, identity objects and authorization logic will remain unchanged.
I need help specifically in seeing if the login/logout flow is doable between the STS and the Open ID Connect IDP
WIF and OpenID Connect are completely different protocols e.g. WIF is mainly browser based in the passive profile. The token types are different - SAML and JWT etc.
The way to do this is via OWIN (Katana is the Microsoft implementation). There are NuGet packages for both WS-Fed and OpenID Connect.
There are samples available for Azure AD - refer Microsoft Azure Active Directory Samples and Documentation that you could use as a guide.
OWIN would allow you to use both protocols.
In fact, have a look at IdentityServer3.
This is an open source STS implementation of both.