Integration Guide

.NET MVC C#

Complete guide for integrating .NET MVC applications with CAS SSO

10 min setup Intermediate .NET 6+

1. NuGet Installation

Package Manager Console

dotnet add package CasSystem.Client
dotnet add package Microsoft.AspNetCore.Authentication.JwtBearer

2. Configuration

appsettings.json

{
  "CasSSO": {
    "ServerUrl": "https://your-cas-server.com",
    "ClientId": "your_client_id",
    "ClientSecret": "your_client_secret",
    "CallbackUrl": "https://your-app.com/cas/callback"
  }
}

3. CAS Service

Services/CasAuthService.cs

public class CasAuthService
{
    private readonly HttpClient _client;
    private readonly CasSettings _settings;

    public async Task<TokenResponse> ValidateToken(string token)
    {
        var payload = new {
            token,
            client_id     = _settings.ClientId,
            client_secret = _settings.ClientSecret
        };

        var response = await _client.PostAsJsonAsync(
            $"{_settings.ServerUrl}/api/sso/validate", payload
        );

        return await response.Content
            .ReadFromJsonAsync<TokenResponse>();
    }
}

4. Controller & Middleware

Program.cs

builder.Services.AddSingleton<CasAuthService>();
builder.Services.AddAuthentication("CasSSO")
    .AddScheme<CasAuthHandler, CasAuthOptions>("CasSSO", null);

app.UseAuthentication();
app.UseAuthorization();

Controllers/DashboardController.cs

[Authorize]
public class DashboardController : Controller
{
    public IActionResult Index()
    {
        var user = HttpContext.Items["CasUser"];
        return View(user);
    }
}

Next Steps

API Reference Security Guide Deployment