Redmine

Hi,

I have a product which build in PHP & MySQL. I have different user groups to manage all pages of my product. I want to integrate Redmine project management into my product page. But i don't want to use different user logins.

If user login to my product i need SSO authentication to verify whether the user available in Redmine or not

1) IF YES, I need to create a login session for that user (auto login in redmine),
2) IF Not available in Redmine, i have to create a user account in Redmine and create a login session for that user

Is there have any SSO user authentication plugins which achieve above requirement?

Please advice me on this.

Thanks in Advance!!!