asp.net - Having problems using SSRS custom authentication and jasig CAS -

i'm trying set ssrs use dotnetcasclient.dll. when try merge these 2 instruction sets, 1 shows how use cas authentication while using iis .net framework. other how use custom forms authentication. has ever got work?

https://msdn.microsoft.com/en-us/library/cc281383.aspx?f=255&mspperror=-2147217396

and

https://wiki.jasig.org/display/casc/.net+cas+client

yes, have create custom assembly override authenticate , authorize methods of ssrs security. need complete authorizations because new class used ssrs , ssrs manager authorize user's access report item collections. authenticate use dotnetcasclient grant access, used inside new custom assembly. once done need configure ssrs , ssrs manager applications use new customsecurity module via web config files.