first commit

src/AuthApp/AuthService.cs

@@ -0,0 +1,25 @@
+using AuthApp.Data;
+using AuthApp.Utils;
+
+/// <summary>
+/// Сервис аутентификации
+/// </summary>
+namespace AuthApp.Services
+{
+    public class AuthService
+    {
+        private readonly UserRepository _repository = new();
+
+        /// <summary>
+        /// Проверка логина и пароля
+        /// </summary>
+        public bool Authenticate(string login, string password)
+        {
+            var user = _repository.GetUser(login);
+            if (user == null) return false;
+
+            string hash = PasswordHasher.Hash(password);
+            return (user.PasswordHash == hash);
+        }
+    }
+}