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Poseidon1974's avatar
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Mar 12, 2023

iRule to decode SAML requests


iRule to decode SAML requests?

Is there an iRule out there, that would decode SAML requests? from the http requests that is.



4 Replies

  • Fun question. A SAML request is typically URL encoded in redirect-binding and not encoded at all in POST-binding. This post describes how to decode something that's URL encoded:

    For POST-binding it's in the HTTP body, so you'd need to collect the content using SSL::collect.

    Keep in mind that when writing security related code it's easy to accidentally introduce vulnerabilities, so try to think about the service you're implementing like a security researcher / attacker.

    As an alternative, the APM module for BIG-IP already has SAML support, so you can also just use the bulit-in functions that have already been well validated for security.