Guide on how to verify your identity with a SAML relying party by utilizing a Web Application as a client

I've been exploring this topic for quite some time now, but haven't had much success.

Here's the scenario: 1. Logging in to a Web Application using standard form authentication. 2. Logging in from the Web Application to a SAML Relying Party.

The problem is: I was considering using an iFrame for authenticating to the SAML Relying Party. However, the main issue with this approach is that once the SAML authentication flow is completed, I need to send a persistent authentication token back to my Web Application client (which will be used for future access of my Web Application to the SAML relying party).

. Could someone provide feedback on whether this method is secure?

. Are there any other methods for authenticating web-based clients to a system set up as a SAML relying party?

Thanks in advance,

Saimon

javascriptsecurityauthenticationsamlopensaml

Answer №1

The issue you're raising pertains to a core aspect of federation systems. Within the framework of SAML, there exists an Identity Provider (IdP) and a Service Provider. It is the IdP's role to validate the user and provide SAML assertions to SP web applications. Based on your query, it seems that your application functions as the IdP seeking to furnish a SAML assertion to the SP web application (assuming your SAML relying party refers to the SP web application). Note that SAML assertions are primarily utilized for one-time authentication to an SP web application, with potential inclusion of attributes for authorization purposes.

Alternatively, one could consider integrating a third-party SAML IdP where your application operates as an SP alongside another application serving as an SP. Both SP web applications would rely on the IdP for authentication and receive corresponding SAML assertions, emphasizing the temporary nature of this data usage.

Another avenue to explore is implementing OpenID Connect (OIDC) utilizing an IdP Server. A key distinction here is that OIDC tokens can have extended validity periods and may be leveraged for secure API interactions beyond initial authentication.

In terms of security implications, each of these protocols incorporates security measures inherent to their respective system architectures when appropriately integrated.

Answer №2

The issue at hand, from my understanding, revolves around an application seeking access to a secure resource that requires SAML-based authentication.

Automating the authentication process in the background presents challenges with CORS on both the Identity Provider and Service Provider sides. Your current approach, however, simplifies things as it involves user-initiated actions, eliminating the need for CORS. In relation to your specific problem, it seems like the token is being included in the header under a designated name. A better solution in this scenario would be to store the token in a Cookie, ensuring it is shared across different frames within your application. When accessing the resource, your Application can then send the cookie. However, if utilizing Javascript & XMLHTTPREQUEST, remember to set "withCredentials".

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