I'm working on an SSO which involves a corporate membership system, wordpress with woocommerce for course sales and Moodle.
All 3 sites are in the same domain, as sub domains
Internally hosted and using ssl
Is there a plugin or method to use the shared cookie? I would like to avoid editing the core code if possible.
Any suggestions are appreciated.
I have done exactly this so it can be done. I just can't give you the code.
However, you are looking at it the wrong way. Forget about cookies - the Moodle cookies don't help you as they are only session identifiers. You will need to create a new authentication plugin for Moodle and use either a standard SSO method (e.g. OAuth) or roll your own using some basic web services. I did the latter using one-time tokens but it really depends on how secure you need it. That and I just don't understand OAuth