AspNetCore.Security.CAS 2.0.2

.NET Standard 2.0
There is a newer version of this package available.
See the version list below for details.
dotnet add package AspNetCore.Security.CAS --version 2.0.2
NuGet\Install-Package AspNetCore.Security.CAS -Version 2.0.2
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="AspNetCore.Security.CAS" Version="2.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add AspNetCore.Security.CAS --version 2.0.2
#r "nuget: AspNetCore.Security.CAS, 2.0.2"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install AspNetCore.Security.CAS as a Cake Addin
#addin nuget:?package=AspNetCore.Security.CAS&version=2.0.2

// Install AspNetCore.Security.CAS as a Cake Tool
#tool nuget:?package=AspNetCore.Security.CAS&version=2.0.2


AspNet.Security.CAS is an ASP.NET Core 2/MVC 6 authentication provider for CAS.

Microsoft.AspNetCore.Authentication.OAuth and Microsoft.AspNetCore.Authentication.Twitter were used as structural references.


  1. Install the NuGet package

    PM> Install-Package AspNetCore.Security.CAS

  2. Open Startup.cs

  3. In your startup's ConfigureServices method:

     	.AddCookie(options =>
     		options.LoginPath = new PathString("/login");
     	.AddCAS(options =>
     		options.CasServerUrlBase = Configuration["CasBaseUrl"];   // Set in `appsettings.json` file.
     		options.SignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
  4. In your startup's Configure method before UseMvc:

  5. In a controller somewhere, create a login endpoint. It doesn't have to auto-challenge/redirect but this example does:

    public async Task Login(string returnUrl)
        var props = new AuthenticationProperties { RedirectUri = returnUrl };
        await HttpContext.ChallengeAsync("CAS", props);


At a minmum, the CasOptions object needs to have the CasServerUrlBase property set to the URL to your CAS server.

These options extend the RemoteAuthenticationOptions class.


Property Description Default
CasServerUrlBase The base url of the CAS server. Required. null
CasValidationUrl Used in cases where ticket validation occurs on a separate server than user login. Optional. null
TicketValidator Gets or sets the ICasTicketValidator used to validate tickets from CAS. Cas2TicketValidator
StateDataFormat Gets or sets the type used to secure data handled by the middleware. PropertiesDataFormat
NameIdentifierAttribute If set, and using the CAS 2 payload, the ticket validator use the specified CAS attribute as the NameIdentifier claim, which is used to associate external logins. null
Renew If this parameter is set, single sign-on will be bypassed. In this case, CAS will require the client to present credentials regardless of the existence of a single sign-on session with CAS. false
Gateway If this parameter is set, CAS will not ask the client for credentials. If the client has a pre-existing single sign-on session with CAS, or if a single sign-on session can be established through non-interactive means (i.e. trust authentication), CAS MAY redirect the client to the URL specified by the service parameter, appending a valid service ticket. false

See the documentation for optional properties for more information if using Renew or Gateway.

Other .NET CAS Providers

MVC 5: Owin.Security.CAS

MVC 4 and below: Jasig's .NET CAS Client

MIT license

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on AspNetCore.Security.CAS:

Package Downloads

Grebok Framework

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.0.5 79,145 5/3/2019
2.0.4 5,188 6/29/2018
2.0.3 833 6/21/2018
2.0.2 1,819 4/10/2018
2.0.1 5,691 10/11/2017
1.1.0 902 10/11/2017
1.0.0 2,047 6/30/2016