As per this link (http://technet.microsoft.com/en-us/library/cc288475(v=office.14).aspx), broadly I can configure any SharePoint site(2010/2013) using 3 types of authentication methods:
- Windows authentication
- Form based authentication
- SAML token-based authentication
After googling I could find out ways to authenticate using SharePoint web services if my site is using Windows or Form based authentication(by setting up username and password in request headers and using authentication.asmx respectively) but could not find how to access a site configured with SAML token-based authentication using SharePoint web services. Can anybody throw some light on it or provide some link?