Added OpenID login.

CarCareTracker.csproj

@@ -13,7 +13,8 @@
   <ItemGroup>
     <PackageReference Include="CsvHelper" Version="30.0.1" />
     <PackageReference Include="LiteDB" Version="5.0.17" />
-    <PackageReference Include="Npgsql" Version="8.0.1" />
+    <PackageReference Include="Npgsql" Version="8.0.2" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.3.1" />
   </ItemGroup>
 
 </Project>

Controllers/LoginController.cs

@@ -4,6 +4,8 @@ using CarCareTracker.Models;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.DataProtection;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
 using System.Net;
 using System.Security.Cryptography;
 using System.Text;
@@ -15,16 +17,19 @@ namespace CarCareTracker.Controllers
     {
         private IDataProtector _dataProtector;
         private ILoginLogic _loginLogic;
+        private IConfigHelper _config;
         private readonly ILogger<LoginController> _logger;
         public LoginController(
             ILogger<LoginController> logger,
             IDataProtectionProvider securityProvider,
-            ILoginLogic loginLogic
+            ILoginLogic loginLogic,
-            ) 
+            IConfigHelper config
+            )
         {
             _dataProtector = securityProvider.CreateProtector("login");
             _logger = logger;
             _loginLogic = loginLogic;
+            _config = config;
         }
         public IActionResult Index(string redirectURL = "")
         {
@@ -42,6 +47,66 @@ namespace CarCareTracker.Controllers
         {
             return View();
         }
+        public IActionResult GetRemoteLoginLink()
+        {
+            var remoteAuthURL = _config.GetOpenIDConfig().RemoteAuthURL;
+            return Json(remoteAuthURL);
+        }
+        public async Task<IActionResult> RemoteAuth(string code)
+        {
+            try
+            {
+                if (!string.IsNullOrWhiteSpace(code))
+                {
+                    //received code from OIDC provider
+                    //create http client to retrieve user token from OIDC
+                    var httpClient = new HttpClient();
+                    var openIdConfig = _config.GetOpenIDConfig();
+                    var httpParams = new List<KeyValuePair<string, string>>
+                {
+                     new KeyValuePair<string, string>("code", code),
+                     new KeyValuePair<string, string>("grant_type", "authorization_code"),
+                     new KeyValuePair<string, string>("client_id", openIdConfig.ClientId),
+                     new KeyValuePair<string, string>("client_secret", openIdConfig.ClientSecret),
+                     new KeyValuePair<string, string>("redirect_uri", openIdConfig.RedirectURL)
+                };
+                    var httpRequest = new HttpRequestMessage(HttpMethod.Post, openIdConfig.TokenURL)
+                    {
+                        Content = new FormUrlEncodedContent(httpParams)
+                    };
+                    var tokenResult = await httpClient.SendAsync(httpRequest).Result.Content.ReadAsStringAsync();
+                    var userJwt = JsonSerializer.Deserialize<OpenIDResult>(tokenResult)?.id_token ?? string.Empty;
+                    if (!string.IsNullOrWhiteSpace(userJwt))
+                    {
+                        //validate JWT token
+                        var tokenParser = new JwtSecurityTokenHandler();
+                        var parsedToken = tokenParser.ReadJwtToken(userJwt);
+                        var userEmailAddress = parsedToken.Claims.First(x => x.Type == "email").Value;
+                        if (!string.IsNullOrWhiteSpace(userEmailAddress))
+                        {
+                            var userData = _loginLogic.ValidateOpenIDUser(new LoginModel() { EmailAddress = userEmailAddress });
+                            if (userData.Id != default)
+                            {
+                                AuthCookie authCookie = new AuthCookie
+                                {
+                                    UserData = userData,
+                                    ExpiresOn = DateTime.Now.AddDays(1)
+                                };
+                                var serializedCookie = JsonSerializer.Serialize(authCookie);
+                                var encryptedCookie = _dataProtector.Protect(serializedCookie);
+                                Response.Cookies.Append("ACCESS_TOKEN", encryptedCookie, new CookieOptions { Expires = new DateTimeOffset(authCookie.ExpiresOn) });
+                                return new RedirectResult("/Home");
+                            }
+                        }
+                    }
+                }
+            } catch (Exception ex)
+            {
+                _logger.LogError(ex.Message);
+                return new RedirectResult("/Login");
+            }
+            return new RedirectResult("/Login");
+        }
         [HttpPost]
         public IActionResult Login(LoginModel credentials)
         {

Helper/ConfigHelper.cs

@@ -7,6 +7,7 @@ namespace CarCareTracker.Helper
 {
     public interface IConfigHelper
     {
+        OpenIDConfig GetOpenIDConfig();
         UserConfig GetUserConfig(ClaimsPrincipal user);
         bool SaveUserConfig(ClaimsPrincipal user, UserConfig configData);
         string GetLogoUrl();
@@ -28,6 +29,11 @@ namespace CarCareTracker.Helper
             _userConfig = userConfig;
             _cache = memoryCache;
         }
+        public OpenIDConfig GetOpenIDConfig()
+        {
+            OpenIDConfig openIdConfig = _config.GetSection("OpenID").Get<OpenIDConfig>() ?? new OpenIDConfig();
+            return openIdConfig;
+        }
         public string GetLogoUrl()
         {
             var logoUrl = _config["LUBELOGGER_LOGO_URL"];

Logic/LoginLogic.cs

@@ -21,6 +21,7 @@ namespace CarCareTracker.Logic
         OperationResponse ResetPasswordByUser(LoginModel credentials);
         OperationResponse ResetUserPassword(LoginModel credentials);
         UserData ValidateUserCredentials(LoginModel credentials);
+        UserData ValidateOpenIDUser(LoginModel credentials);
         bool CheckIfUserIsValid(int userId);
         bool CreateRootUserCredentials(LoginModel credentials);
         bool DeleteRootUserCredentials();
@@ -193,6 +194,19 @@ namespace CarCareTracker.Logic
                 }
             }
         }
+        public UserData ValidateOpenIDUser(LoginModel credentials)
+        {
+            var result = _userData.GetUserRecordByEmailAddress(credentials.EmailAddress);
+            if (result.Id != default)
+            {
+                result.Password = string.Empty;
+                return result;
+            }
+            else
+            {
+                return new UserData();
+            }
+        }
         #region "Admin Functions"
         public bool MakeUserAdmin(int userId, bool isAdmin)
         {

Models/OIDC/OpenIDConfig.cs

@@ -0,0 +1,14 @@
+namespace CarCareTracker.Models
+{
+    public class OpenIDConfig
+    {
+        public string Name { get; set; }
+        public string ClientId { get; set; }
+        public string ClientSecret { get; set; }
+        public string AuthURL { get; set; }
+        public string TokenURL { get; set; }
+        public string RedirectURL { get; set; }
+        public string Scope { get; set; }
+        public string RemoteAuthURL { get { return $"{AuthURL}?client_id={ClientId}&response_type=code&redirect_uri={RedirectURL}&scope={Scope}"; } }
+    }
+}

Models/OIDC/OpenIDResult.cs

@@ -0,0 +1,7 @@
+namespace CarCareTracker.Models
+{
+    public class OpenIDResult
+    {
+        public string id_token { get; set; }
+    }
+}

Views/Login/Index.cshtml

@@ -5,6 +5,7 @@
 @{
     var logoUrl = config.GetLogoUrl();
     var userLanguage = config.GetServerLanguage();
+    var openIdConfigName = config.GetOpenIDConfig().Name;
 }
 @{
     ViewData["Title"] = "LubeLogger - Login";
@@ -31,6 +32,12 @@
             <div class="d-grid">
                 <button type="button" class="btn btn-warning mt-2" onclick="performLogin()"><i class="bi bi-box-arrow-in-right me-2"></i>@translator.Translate(userLanguage, "Login")</button>
             </div>
+            @if (!string.IsNullOrWhiteSpace(openIdConfigName))
+            {
+                <div class="d-grid">
+                    <button type="button" class="btn btn-secondary mt-2" onclick="remoteLogin()"><i class="bi bi-box-arrow-in-right me-2"></i>@($"{translator.Translate(userLanguage, "Login via")} {openIdConfigName}")</button>
+                </div>
+            }
             <div class="d-grid">
                 <a href="/Login/ForgotPassword" class="btn btn-link mt-2">@translator.Translate(userLanguage, "Forgot Password")</a>
             </div>
@@ -41,7 +48,7 @@
     </div>
 </div>
 <script>
-    function getRedirectURL(){
+    function getRedirectURL() {
         return { url: decodeHTMLEntities('@Model') };
     }
 </script>

wwwroot/js/login.js

@@ -59,4 +59,12 @@ function handlePasswordKeyPress(event) {
     if (event.keyCode == 13) {
         performLogin();
     }
+}
+
+function remoteLogin() {
+    $.get('/Login/GetRemoteLoginLink', function (data) {
+        if (data) {
+            window.location.href = data;
+        }
+    })
 }