如何从当前网站登录另一个网站

Question

There are 2 websites, Website A and B. The requirement goes like this:

• Website A has a login page.
• On successful login of Website A, the user should be redirected to Website B homepage.

• Note:

  • The user account/credentials for both websites are same.

• Although Website B has an login page, the successful login in Website A should bypass the login page of Website B and show its (Website B's) homepage.

So my question is whether the above scenario is practially possible in C#, ASP.Net?

If possible, then how can the above requirement work in following environments: - Both websites are hosted in the same domain. - Both websites are hosted in different domains.

Can you please suggest me the ways of designing and implementing the above requirement.

Thanks in advance!!!.

Answer 1

There are multiple options to implement SSO for a .NET application.

Check out the following tutorials online:

Basics of Single Sign on, July 2012

http://www.codeproject.com/Articles/429166/Basics-of-Single-Sign-on-SSO

GaryMcAllisterOnline: ASP.NET MVC 4, ADFS 2.0 and 3rd party STS integration (IdentityServer2), Jan 2013

http://garymcallisteronline.blogspot.com/2013/01/aspnet-mvc-4-adfs-20-and-3rd-party-sts.html

The first one uses ASP.NET Web Forms, while the second one uses ASP.NET MVC4.

If your requirements allow you to use a third-party solution, also consider OpenID. There's an open source library called DotNetOpenAuth.

For further information, read MSDN blog post Integrate OpenAuth/OpenID with your existing ASP.NET application using Universal Providers.

Hope this helps!