ApiDto/Common/AuthRoles.cs

@@ -0,0 +1,12 @@
+namespace Mirea.Api.Dto.Common;
+
+/// <summary>
+/// An enumeration that indicates which role the user belongs to
+/// </summary>
+public enum AuthRoles
+{
+    /// <summary>
+    /// Administrator
+    /// </summary>
+    Admin
+}

ApiDto/Requests/LoginRequest.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Mirea.Api.Dto.Requests;
+
+/// <summary>
+/// Request to receive protected content
+/// </summary>
+public class LoginRequest
+{
+    /// <summary>
+    /// Login or Email to identify the client.
+    /// </summary>
+    [Required]
+    public required string Username { get; set; }
+
+    /// <summary>
+    /// The client's password.
+    /// </summary>
+    [Required]
+    public required string Password { get; set; }
+}

ApiDto/Responses/TokenResponse.cs

@@ -0,0 +1,23 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace Mirea.Api.Dto.Responses;
+
+/// <summary>
+/// Provides a JWT and RT token.
+/// </summary>
+public class TokenResponse
+{
+    /// <summary>
+    /// A JWT token for accessing protected resources.
+    /// </summary>
+    [Required]
+    public required string AccessToken { get; set; }
+
+    /// <summary>
+    /// The date and time when the JWT token expires.
+    /// </summary>
+    /// <remarks>After this date, a new JWT token must be requested.</remarks>
+    [Required]
+    public required DateTime ExpiresIn { get; set; }
+}

Endpoint/Common/Services/Security/DistributedCacheService.cs

@@ -17,7 +17,7 @@ public class DistributedCacheService(IDistributedCache cache) : ICacheService
             SlidingExpiration = slidingExpiration
         };
 
-        var serializedValue = JsonSerializer.SerializeToUtf8Bytes(value);
+        var serializedValue = value as byte[] ?? JsonSerializer.SerializeToUtf8Bytes(value);
         await cache.SetAsync(key, serializedValue, options, cancellationToken);
     }
 

Endpoint/Common/Services/Security/MemoryCacheService.cs

@@ -1,6 +1,7 @@
 using Microsoft.Extensions.Caching.Memory;
 using Mirea.Api.Security.Common.Interfaces;
 using System;
+using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -16,14 +17,17 @@ public class MemoryCacheService(IMemoryCache cache) : ICacheService
             SlidingExpiration = slidingExpiration
         };
 
-        cache.Set(key, value, options);
+        cache.Set(key, value as byte[] ?? JsonSerializer.SerializeToUtf8Bytes(value), options);
         return Task.CompletedTask;
     }
 
     public Task<T?> GetAsync<T>(string key, CancellationToken cancellationToken = default)
     {
-        cache.TryGetValue(key, out T? value);
-        return Task.FromResult(value);
+        return Task.FromResult(
+            cache.TryGetValue(key, out byte[]? value) ?
+            JsonSerializer.Deserialize<T>(value) :
+            default
+        );
     }
 
     public Task RemoveAsync(string key, CancellationToken cancellationToken = default)

Endpoint/Configuration/AppConfig/SwaggerConfiguration.cs

@@ -2,6 +2,7 @@
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
+using Microsoft.OpenApi.Models;
 using Mirea.Api.Endpoint.Configuration.Swagger;
 using Swashbuckle.AspNetCore.SwaggerGen;
 using System;
@@ -19,6 +20,29 @@ public static class SwaggerConfiguration
             options.OperationFilter<SwaggerDefaultValues>();
             var basePath = AppDomain.CurrentDomain.BaseDirectory;
 
+            options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
+            {
+                In = ParameterLocation.Header,
+                Description = "Keep the JWT token in the field (Bearer token)",
+                Name = "Authorization",
+                Type = SecuritySchemeType.ApiKey
+            });
+
+            options.AddSecurityRequirement(new OpenApiSecurityRequirement
+            {
+                {
+                    new OpenApiSecurityScheme
+                    {
+                        Reference = new OpenApiReference
+                        {
+                            Type = ReferenceType.SecurityScheme,
+                            Id = "Bearer"
+                        }
+                    },
+                    []
+                }
+            });
+
             options.IncludeXmlComments(Path.Combine(basePath, "docs.xml"));
             options.IncludeXmlComments(Path.Combine(basePath, "ApiDtoDocs.xml"));
         });

Endpoint/Controllers/V1/AuthController.cs

@@ -0,0 +1,158 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+using Microsoft.Extensions.Options;
+using Mirea.Api.Dto.Common;
+using Mirea.Api.Dto.Requests;
+using Mirea.Api.Dto.Responses;
+using Mirea.Api.Endpoint.Common.Model;
+using Mirea.Api.Security.Common.Dto.Requests;
+using Mirea.Api.Security.Services;
+using System;
+using System.Security;
+using System.Threading.Tasks;
+
+namespace Mirea.Api.Endpoint.Controllers.V1;
+
+[ApiVersion("1.0")]
+public class AuthController(IOptionsSnapshot<Admin> user, AuthService auth, PasswordHashService passwordService) : BaseController, IActionFilter
+{
+    private string Fingerprint { get; set; } = string.Empty;
+    private string Ip { get; set; } = string.Empty;
+    private string UserAgent { get; set; } = string.Empty;
+    private string RefreshToken { get; set; } = string.Empty;
+
+    private void SetCookie(string name, string value, DateTimeOffset? expires = null)
+    {
+        var cookieOptions = new CookieOptions
+        {
+            Expires = expires,
+            Path = "/api",
+            Domain = Request.Headers["X-Forwarded-Host"],
+            Secure = true,
+            HttpOnly = true
+        };
+
+        Response.Cookies.Append(name, value, cookieOptions);
+    }
+
+    private void SetRefreshToken(string value, DateTimeOffset? expires = null) =>
+        SetCookie("refresh_token", value, expires);
+
+    private void SetFirstToken(string value, DateTimeOffset? expires = null) =>
+        SetCookie("authentication_token", value, expires);
+
+    [ApiExplorerSettings(IgnoreApi = true)]
+    public void OnActionExecuting(ActionExecutingContext context)
+    {
+        Ip = context.HttpContext.Connection.RemoteIpAddress?.ToString()!;
+        UserAgent = context.HttpContext.Request.Headers.UserAgent.ToString();
+        Fingerprint = context.HttpContext.Request.Cookies["user_key"] ?? string.Empty;
+        RefreshToken = Request.Cookies["refresh_token"] ?? string.Empty;
+
+        if (!string.IsNullOrWhiteSpace(Fingerprint)) return;
+
+        Fingerprint = Guid.NewGuid().ToString().Replace("-", "");
+        SetCookie("user_key", Fingerprint);
+    }
+
+    [ApiExplorerSettings(IgnoreApi = true)]
+    public void OnActionExecuted(ActionExecutedContext context) { }
+
+    /// <summary>
+    /// Handles user authentication by verifying the username/email and password, 
+    /// then generating and returning an authentication token if successful.
+    /// </summary>
+    /// <param name="request">The login request containing the username/email and password.</param>
+    /// <returns>A TokenResponse containing the access token and its expiry if successful, otherwise an Unauthorized response.</returns>
+    [HttpPost("Login")]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult<TokenResponse>> Login([FromBody] LoginRequest request)
+    {
+        var userEntity = user.Value;
+
+        if (!userEntity.Username.Equals(request.Username, StringComparison.OrdinalIgnoreCase) &&
+            !userEntity.Email.Equals(request.Username, StringComparison.OrdinalIgnoreCase) ||
+            !passwordService.VerifyPassword(request.Password, userEntity.Salt, userEntity.PasswordHash))
+            return Unauthorized("Invalid username/email or password");
+
+        var token = await auth.GenerateAuthTokensAsync(new TokenRequest
+        {
+            Fingerprint = Fingerprint,
+            Ip = Ip,
+            UserAgent = UserAgent
+        }, "1");
+
+        SetRefreshToken(token.RefreshToken, token.RefreshExpiresIn);
+
+        return Ok(new TokenResponse
+        {
+            AccessToken = token.AccessToken,
+            ExpiresIn = token.AccessExpiresIn
+        });
+    }
+
+    /// <summary>
+    /// Refreshes the authentication token using the existing refresh token.
+    /// </summary>
+    /// <returns>A TokenResponse containing the new access token and its expiry if successful, otherwise an Unauthorized response.</returns>
+    [HttpGet("ReLogin")]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult<TokenResponse>> ReLogin()
+    {
+        if (string.IsNullOrEmpty(RefreshToken))
+            return Unauthorized();
+
+        try
+        {
+            var token = await auth.RefreshTokenAsync(
+                new TokenRequest
+                {
+                    Ip = Ip,
+                    UserAgent = UserAgent,
+                    Fingerprint = Fingerprint
+                },
+                RefreshToken
+            );
+
+            SetRefreshToken(token.RefreshToken, token.RefreshExpiresIn);
+
+            return Ok(new TokenResponse
+            {
+                AccessToken = token.AccessToken,
+                ExpiresIn = token.AccessExpiresIn
+            });
+        }
+        catch (SecurityException)
+        {
+            return Unauthorized();
+        }
+    }
+
+    /// <summary>
+    /// Logs the user out by clearing the refresh token and performing any necessary cleanup.
+    /// </summary>
+    /// <returns>An Ok response if the logout was successful.</returns>
+    [HttpGet("Logout")]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [Authorize]
+    public async Task<ActionResult> Logout()
+    {
+        SetRefreshToken("", DateTimeOffset.MinValue);
+        SetFirstToken("", DateTimeOffset.MinValue);
+
+        await auth.LogoutAsync(Fingerprint);
+
+        return Ok();
+    }
+
+    /// <summary>
+    /// Retrieves the role of the authenticated user.
+    /// </summary>
+    /// <returns>The role of the authenticated user.</returns>
+    [HttpGet("GetRole")]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [Authorize]
+    public ActionResult<AuthRoles> GetRole() => Ok(AuthRoles.Admin);
+}

Endpoint/Middleware/JwtRevocationMiddleware.cs

@@ -0,0 +1,23 @@
+using Microsoft.AspNetCore.Http;
+using Mirea.Api.Security.Common.Interfaces;
+using System.Threading.Tasks;
+
+namespace Mirea.Api.Endpoint.Middleware;
+
+public class JwtRevocationMiddleware(RequestDelegate next)
+{
+    public async Task Invoke(HttpContext context, IRevokedToken revokedTokenStore)
+    {
+        if (context.Request.Headers.ContainsKey("Authorization"))
+        {
+            var token = context.Request.Headers.Authorization.ToString().Replace("Bearer ", "");
+            if (await revokedTokenStore.IsTokenRevokedAsync(token))
+            {
+                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
+                return;
+            }
+        }
+
+        await next(context);
+    }
+}

Endpoint/Program.cs

@@ -6,6 +6,7 @@ using Mirea.Api.DataAccess.Application;
 using Mirea.Api.DataAccess.Persistence;
 using Mirea.Api.DataAccess.Persistence.Common;
 using Mirea.Api.Endpoint.Common.Interfaces;
+using Mirea.Api.Endpoint.Common.Model;
 using Mirea.Api.Endpoint.Common.Services;
 using Mirea.Api.Endpoint.Configuration.AppConfig;
 using Mirea.Api.Endpoint.Configuration.General;
@@ -37,6 +38,8 @@ public class Program
         builder.Configuration.AddConfiguration(EnvironmentConfiguration.GetEnvironment());
         builder.Configuration.AddJsonFile(PathBuilder.Combine(GeneralConfig.FilePath), optional: true, reloadOnChange: true);
         builder.Services.Configure<GeneralConfig>(builder.Configuration);
+        builder.Configuration.AddJsonFile(PathBuilder.Combine(Admin.PathToSave), optional: true, reloadOnChange: true);
+        builder.Services.Configure<Admin>(builder.Configuration);
 
         builder.Host.AddCustomSerilog();
         AddDatabase(builder.Services, builder.Configuration);
@@ -95,6 +98,7 @@ public class Program
 
         app.UseMiddleware<MaintenanceModeMiddleware>();
         app.UseMiddleware<CustomExceptionHandlerMiddleware>();
+        app.UseMiddleware<JwtRevocationMiddleware>();
 
         app.UseHttpsRedirection();
 

Security/Common/Dto/Responses/AuthTokenResponse.cs

@@ -5,6 +5,7 @@ namespace Mirea.Api.Security.Common.Dto.Responses;
 public class AuthTokenResponse
 {
     public required string AccessToken { get; set; }
+    public DateTime AccessExpiresIn { get; set; }
     public required string RefreshToken { get; set; }
-    public DateTime ExpiresIn { get; set; }
+    public DateTime RefreshExpiresIn { get; set; }
 }

Security/Services/AuthService.cs

@@ -34,7 +34,7 @@ public class AuthService(ICacheService cache, IAccessToken accessTokenService, I
     public async Task<AuthTokenResponse> GenerateAuthTokensAsync(TokenRequest request, string userId, CancellationToken cancellation = default)
     {
         var refreshToken = GenerateRefreshToken();
-        var accessToken = GenerateAccessToken(userId);
+        var (token, expireIn) = GenerateAccessToken(userId);
 
         var authTokenStruct = new AuthToken
         {
@@ -43,16 +43,17 @@ public class AuthService(ICacheService cache, IAccessToken accessTokenService, I
             RefreshToken = refreshToken,
             UserAgent = request.UserAgent,
             UserId = userId,
-            AccessToken = accessToken.Token
+            AccessToken = token
         };
 
         await SetAuthTokenDataToCache(request.Fingerprint, authTokenStruct, cancellation);
 
         return new AuthTokenResponse
         {
-            AccessToken = accessToken.Token,
-            ExpiresIn = accessToken.ExpireIn,
-            RefreshToken = authTokenStruct.RefreshToken
+            AccessToken = token,
+            AccessExpiresIn = expireIn,
+            RefreshToken = authTokenStruct.RefreshToken,
+            RefreshExpiresIn = DateTime.UtcNow.Add(Lifetime),
         };
     }
 
@@ -71,23 +72,28 @@ public class AuthService(ICacheService cache, IAccessToken accessTokenService, I
             authToken.UserAgent != request.UserAgent &&
             authToken.Ip != request.Ip)
         {
-            await cache.RemoveAsync(request.Fingerprint, cancellation);
+            await cache.RemoveAsync(GetAuthCacheKey(request.Fingerprint), cancellation);
             await RevokeAccessToken(authToken.AccessToken);
 
             throw new SecurityException(request.Fingerprint);
         }
 
-        var accessToken = GenerateAccessToken(authToken.UserId);
+        var (token, expireIn) = GenerateAccessToken(authToken.UserId);
         await RevokeAccessToken(authToken.AccessToken);
 
-        authToken.AccessToken = accessToken.Token;
+        var newRefreshToken = GenerateRefreshToken();
+
+        authToken.AccessToken = token;
+        authToken.RefreshToken = newRefreshToken;
+
         await SetAuthTokenDataToCache(request.Fingerprint, authToken, cancellation);
 
         return new AuthTokenResponse
         {
-            AccessToken = accessToken.Token,
-            ExpiresIn = accessToken.ExpireIn,
-            RefreshToken = GenerateRefreshToken()
+            AccessToken = token,
+            AccessExpiresIn = expireIn,
+            RefreshToken = newRefreshToken,
+            RefreshExpiresIn = DateTime.UtcNow.Add(Lifetime)
         };
     }