IdP CSRF Defence

[Philip Smart]

Hi All,

I have put together three options for integrating a synchroniser token pattern based Cross Site Request Forgery (CSRF) defence into the IdP's Password authentication flow [1] (and potentially more widely). Each comes with an implementation (in a feature branch) on my personal git repository [2] (which should allow anonymous read access).

Login CSRF is fairly difficult to exploit on the IdP in its current state, but an additional defence should make that more robust/concrete.

This work does not represent production ready enhancements, or is not endorsed by anybody at this stage. It just represents some investigatory work and proof of concepts I have been working on.

All comments welcome…including, why did you do that, why did you not just do this….



[1] https://wiki.shibboleth.net/confluence/display/DEV/CSRF+Mitigation+Options
[2] git at git.shibboleth.net<mailto:git at git.shibboleth.net>:philsmart/java-identity-provider

Phil

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