ASP.NET membership/ automatically log existing user on

Question

I have used facebook to allow users to log into a site. The page that manages the login will get the users facebook id and then look on the ASP.NET membership tables for a pre-existing user that has a matching ID.

No match: a new user is created and logged in (no problem).

A match: I want to log the user on. The problem is that I have the hashed password and I cannot use MembershipService.ValidateUser(logOn.UserName, logOn.Password) to log the user on.

If I just use FormsAuthentication.SetAuthCookie, the user doesn't appear as logged in.

I could set enablePasswordRetrieval to true in the web config and then just get the actual password, but I don't want to. I want this to be secure.

Does anyone know a way to log a user onto ASP.NET Membership just using the user name? I have looked at the MembershipProvider class for alternative methods but I cant find any.

Thanks,

Oliver

Brian Mains · Accepted Answer · 2017-05-23 18:38:52Z

2

You could try FormsAuthentication.RedirectFromLoginPage (http://msdn.microsoft.com/en-us/library/ka5ffkce.aspx), which sets the cookie (I believe,though you may have to manually set the cookie), and then redirect to the designated page to redirect from (specified in the configuration file for the auth settings). Essentially, after setting the cookie, you do have to do a redirect or postback after setting it, because it won't look like the application has enabled your authentication.

HTH.

edited May 23, 2017 at 18:38

answered Oct 10, 2011 at 23:46

Brian Mains

50.8k35 gold badges155 silver badges260 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Oliver Over a year ago

It seems I must have mis-tested!! Using FormsAuthentication.SetAuthCookie does work. :/ Thanks!!

Van · Accepted Answer · 2011-10-10 23:50:02Z

0

I think you can try to create your own authentication cookie containing a custom authentication ticket.

Refer to this msdn article on how to create your own auth ticket and cookie

http://msdn.microsoft.com/en-us/library/ff649204.aspx

answered Oct 10, 2011 at 23:50

Van

1,3871 gold badge10 silver badges19 bronze badges

Collectives™ on Stack Overflow

ASP.NET membership/ automatically log existing user on

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related