Added OpenID authentication method

testing/HopFrame.Testing.Api/Controllers/AuthController.cs

@@ -0,0 +1,28 @@
+using HopFrame.Security.Authentication.OpenID;
+using Microsoft.AspNetCore.Mvc;
+using HopFrame.Security.Authentication.OpenID.Models;
+
+namespace HopFrame.Testing.Api.Controllers;
+
+public class AuthController(IOpenIdAccessor accessor) : Controller {
+
+    [HttpGet("auth/callback")]
+    public async Task<ActionResult<string>> Callback([FromQuery] string code, [FromQuery] string state) {
+        if (string.IsNullOrEmpty(code)) {
+            return BadRequest("Authorization code is missing");
+        }
+
+        var token = await accessor.RequestToken(code);
+        return Ok(token.AccessToken);
+    }
+
+    [HttpGet("auth")]
+    public async Task<ActionResult> Authenticate() {
+        return Redirect(await accessor.ConstructAuthUri());
+    }
+
+    [HttpGet("check")]
+    public async Task<ActionResult<OpenIdIntrospection>> Check([FromQuery] string token) {
+        return Ok(await accessor.InspectToken(token));
+    }
+}