i need to integrate with SAP, they send the following URL with username and password authentication.
when i access this url i redirected to
https://sts.xxxx/adfs/ls/?SAMLRequest=fVFbS8MwFP4rJe9t07oLDWuhrCgFlWFFwRfJmlMXSJOak8757007lPmgcB4OH%2Be7JRvkvRpYObqDfoD3EdAFdZWThtIlXa4yCGm23ocJiGW4hzYL04WgHazTlIqEBE9gURqdkzSiJKgRR6g1Oq6dh2iyCunCzyPN2FXGFvSFBJV3kJq7mXVwbkAWx%2Bgw8kF49GaOfom56DBWGJPg2tgW5nQ56bhCmFx2HFEe4QcpEcFOilujcezBNmCPsvVRBJxy4pOdeqWRzV1zMlrNDEeJTPMekLmWNeXdLfMd2GCNM61RpNhM12yuZC%2F4%2F9P5dxJSNOXu9ea52sQXOmfRgd17Yl3tjJLt51Sx5%2B5v3SRKZkSKsJtP2ahxgFZ2EoQvr5T52Frgzj%2BIsyOQuDib%2Fv7W4gs%3D&RelayState=oucqqvqvwzeoqzxboredvobeczosudqfexssqdr&SigAlg=http%3A%2F%2Fwww.w3.org%2F
which requires login authentication as attached 1,,
enter image description here
Questions: How can i access this service in .NET Programming?
The ADFS security token service (STS) can be access pro grammatically. Here is an example that uses powershell https://blogs.msdn.microsoft.com/besidethepoint/2012/10/17/request-adfs-security-token-with-powershell/
You will need to follow SAML2 protocol with SAMLRequest and SAMLResponse tokens.
Here is the nice explanation:
SAML (or more specifically, SAML version 2.0) is what brings
Single-Signon to SURFconext – being able to authenticate only once to
your home university (or Identity Provider in SAML parlance) and
subsequently login to many applications (or Service Providers) without
having to type in a password again.
let’s take a look at what happens when someone wants to log in at a Service Provider (SP) that uses federated authentication for one of its customers (the IDP). For the sake of example, let’s say the SP is Google Apps and the IDP is an organisation called My University, where Alice is a student. The flow of SAML protocol messages can be illustrated in a diagram as follows:
Related
According to the following documentation, I understand that OAuth2 is an Authorization protocol:
https://learn.microsoft.com/en-us/azure/active-directory/develop/authentication-vs-authorization#authorization
Considering that OAuth 2.0 authorization code flow is an authorization protocol, why in many application types and scenarios (including the code example below), authorization code flow is used to authenticate a user (using its password) then provides an access token to the application.
https://github.com/Azure-Samples/active-directory-b2c-dotnet-desktop
The confusion I have is that most OAuth2 flows use a user's password to identify her/him then provide an access token to the application.
As another example, I learned that PowerApps portal uses OAuth2 PKCE to identify users through B2C. It seems that PowerApps uses OAuth2 PKCE to authenticate users, not authenticate them. I was expecting OpenID Connect should be used for such a scenario.
Is OAuth2 Authorization Code flow an authentication or authentication protocol or both of them?
Yes, OAuth2 is an authorization protocol.
It did not provide a consistent way to authenticate and the social providers e.g. Facebook, Twitter etc. then rolled their own authentication models to provide this service.
As a result, OpenID Connect was developed. This provides a standard way to authenticate and is built on top of OAuth2.
(There was an earlier standard called OpenID for authentication but that is not often used now).
As per this:
"OpenID Connect (OIDC) is an authentication protocol built on OAuth 2.0 that you can use to securely sign in a user to an application. When you use the Microsoft identity platform's implementation of OpenID Connect, you can add sign-in and API access to your apps.
OpenID Connect extends the OAuth 2.0 authorization protocol for use as an authentication protocol, so that you can do single sign-on using OAuth.
OpenID Connect introduces the concept of an ID token, which is a security token that allows the client to verify the identity of the user.
The ID token also gets basic profile information about the user. It also introduces the UserInfo endpoint, an API that returns information about the user".
PKCE is for "OAuth 2.0 public clients utilizing the Authorization Code Grant.
These are susceptible to authorization code interception attacks.
This specification describes the attack as well as a technique to mitigate against the threat through the use of Proof Key for Code Exchange (PKCE, pronounced "pixy")".
So after authenticating with OIDC, PKCE makes the Authorization Code Grant flow more secure.
I have been looking into using an identity provider (IDP) to provide user authentication for a Windows Forms client. The user credentials will be hosted by Auth0. After creating a trial account with Auth0 I have downloaded a sample C# Windows Forms client application that can be used to authenticate to the Auth0 IDP using OpenID Connect ("OIDC"). The WinForms sample application pops up a web browser component, displays the Auth0 login screen, I login to the Auth0 IDP (having setup some test credentials in Auth0) and the WinForms application then is sent an authentication token. All well and good, and if I try to login a second time I no longer need to enter my credentials.
However... the company that I will be fetching authentication data from in production would like to use SAML. Is there any way to do this? Based on what I have read, SAML needs a "Service Provider" that will receive credentials from the IDP. The Service Provider is (typically?) a web site. That does not seem to match very well with what I am trying to do (authenticate a windows client). Is there any way of using SAML to do essentially what I have done using OIDC (fetch authentication information for a user from an IDP)? Would I need to develop a separate Service Provider component for this?
Sounds like what you've done so far is fine architecturally:
A modern desktop app following OIDC standards
This puts you in a good position architecturally, where:
Your app gets tokens from Auth0 using OIDC
Auth0 can reach out and do federated authentication with other standards based identity providers, which could be SAML, OIDC, WS-Federation or anything else
This can be done without changing any code in your app - and your app does not need to understand SAML
Feels like you need to set up a federated connection from Auth0 to the SAML Service Provider, and most commonly this involves these steps:
You give the partner your Entity Id and Response URL, to post tokens to
They give you am Entity Id, Public Key Certificate and request URL
You configure rules around account linking, so that users can be matched between their system and yours
There are prerequisites though, and the external identity provider needs to be SAML 2.0 compliant. My Federated Logins Article may help you to understand the general concepts, though I do not drill into SAML details here.
My goal is to provide an internet facing application that can be used by both corporate employees and external users. I would have 2 ADFS instances behind an IdentityServer4 instance, one for external users and one for corporate employees.
In general all users(employees or external) should always get an oAuth2 Token to call internet facing APIs, but when there are internal calls between SAML dependent corporate systems, the internal calls should be able to get a SAML2 token or impersonate a corporate corporate user.
No problem with external users, using openid and oAuth2. The main focus is employee login via SAML2.
The setup is as below:
IdentityServer4 sits in the front backed by ADFS
Client applications should connect with IdentityServer4 using OpenId specs (/connect/authorize? end point. I know how to do that
IdentityServer4 should connect to ADFS for external users setup via Ws-Fed. I know how to get till here.
IdentityServer4 should connect to internal ADFS for corporate employees over SAML2. It would be nice to be able to switch between the two ADFS' instances based on user's email address. Just like on Azure you get a message: we are taking you to your employer's login page, if user entered a known corporate email domain. This switch should happen via IdentityServer UI though, probably mimicking Home Realm Discovery feature.
IdentityServer4 should issue oAuth tokens in either case.
6 When connecting to corporate ADFS via SAML2, IdentityServer4 should receive a signed, encrypted SAML2 token response and it should then issue regular oAuth token for external APIs
Some external APIs might want to call internal corporate SAML based APIs, (*only for corporate users) There must be a way to impersonate the user, get his SAML token and pass to corporate APIs.
If all of that makes sense,
- how can I achieve step 5,6 and 7?
- Is there a middleware that can exchange SAML2 token with ADFS?
- Is it just possible to pass this SAML2 token directly to internal SAML
supporting systems?
I have never used SAML2 token before so I am a little lost as to how does it look like, is it something like an access token or is it something to be built using the assertions in ADFS response?
I know I asked a lot of questions but everything is related. I am exploring SustainSys but haven't been able to find way to plug it in to do what I want to do.
New to Azure AD... So please don't be too harsh if this is off target. :-)
Technology Stack - Latest Angular 2 with C# Middle tier and latest .Net Framework.
Ideally, What we want to do is use Azure AD B2C to store user credentials and to do the authentication - but we want our 'own' forms on our site to do the login Forms capture and logging - then pass the credentials through an API (REST?) Call (using MS Graph SDK?) to Azure AD B2C and then check the call return for the Authorization content message.
Couple of reasons - control of the application flow, Logging and the "flickering of the URL" (i.e. going from our site URL to login.microsoft... URL and then back to our sites URL).
Is this doable without doing a hack?
Thank you in advance for your help and patience!
You are looking for the "Resource Owner Password Credentials".
This is not currently supported for Azure AD B2C, but you can give user feedback to the B2C team that you want this through the Azure Feedback Forum: Add support for Resource Owner Password Credentials flow in Azure AD B2C and headless authentication in Microsoft Authentication Library
You should also see updates at that location if and when they implement this feature.
The resource owner password credentials flow is now in preview.
In Azure Active Directory (Azure AD) B2C, the following options are
supported:
Native Client: User interaction during authentication happens when
code runs on a user-side device. The device can be a mobile
application that's running in a native operating system, such as
Android, or running in a browser, such as JavaScript.
Public client flow: Only user credentials, gathered by an application, are sent in
the API call. The credentials of the application are not sent.
Add new claims: The ID token contents can be changed to add new claims.
The following flows are not supported:
Server-to-server: The identity protection system needs a reliable IP
address gathered from the caller (the native client) as part of the
interaction. In a server-side API call, only the server’s IP address
is used. If a dynamic threshold of failed authentications is exceeded,
the identity protection system may identify a repeated IP address as
an attacker.
Confidential client flow: The application client ID is
validated, but the application secret is not validated.
From here.
Note that one disadvantage of doing what you're requesting is precisely that you can do "login forms capture and logging", so your application has a chance to see the credentials and perhaps take copies of them; thus your users have to trust you to behave.
The normal web-based flow means that your application doesn't need to be trusted; it never even sees the password at all.
Sorry I am still very confused, read everywhere telling me oath is a authorisation protocol but it appears using the azure ad oauth code grant, it does promote a login screen to authenticate against the directory, so is it not an authentication process? what is the relationship between the open id connect? thanks!!
the OAuth2.0 protocol has several flows that an identity provider (in your case Azure AD) may implement to support auth.
The Auth Code flow is in fact one of these used by apps to get access tokens for some api. The flow is quite simple, an app redirects the user to the identity providers /authorize endpoint. At this point the user enters their credentials, and the site redirects back to your application with an authorization code and can also issue an ID Token that represents a user (This is the OpenID Connect part). The app takes this code, and POSTs it to the /token endpoint and will be issued an access token and refresh token. With the access token, your app can access whatever api you've requested access for.
For Azure AD specifically, Microsoft has built libraries that handle all these flows and token caching so most of the complexity is abstracted away. There's some simple code samples that you can checkout that you may find helpful. The authentication protocols and scenarios doc for Azure AD may also be really helpful for conceptual information.