[feature] 建立鉴权项目结构

SiteManagementSystem(SoftwareEngineering)/Service/SQLService.cs

@@ -0,0 +1,16 @@
+
+using Microsoft.EntityFrameworkCore;
+using SiteManagementSystem_SoftwareEngineering_.Entity;
+
+namespace SiteManagementSystem_SoftwareEngineering_.Service
+{
+    public class SQLService : DbContext
+    {
+        public SQLService(DbContextOptions<SQLService> options)
+            : base(options)
+        {
+            Database.EnsureCreated();
+        }
+        public DbSet<User> Users { get; set; }
+    }
+}

SiteManagementSystem(SoftwareEngineering)/Service/UserManagerService.cs

@@ -0,0 +1,70 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.IdentityModel.Tokens;
+using SiteManagementSystem_SoftwareEngineering_.Entity;
+using SiteManagementSystem_SoftwareEngineering_.Interface;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace SiteManagementSystem_SoftwareEngineering_.Service
+{
+    public enum IdentityPolicyNames
+    {
+        NotSupport,
+        CommonUser,
+        Administrator
+    }
+    public class UserManagerService
+    {
+        public class UserManageService(
+        SQLService storageService,
+        ILogger<UserManageService> logger,
+        string secretSalt
+    ) : IUserManageService
+        {
+            private readonly SQLService _storageService = storageService;
+            private readonly ILogger<UserManageService> _logger = logger;
+            private readonly string _salt = secretSalt;
+            private static readonly object _lock = new();
+            public void AddUser(User user)
+            {
+                if (user.Name is null)
+                    throw new ArgumentException("Miss Name!");
+                if (user.RoleName is null)
+                    throw new ArgumentException("Miss PolicyName!");
+                if (user.Role is IdentityPolicyNames.NotSupport)
+                    throw new ArgumentException("PolicyName not support");
+                if (user.Secret is null)
+                    throw new ArgumentException("Miss Secret!");
+                user.HashSecret = ComputeHash(user.Secret);
+                if (_storageService.Users.Where(x => x.Name==user.Name).Any())
+                    throw new InvalidOperationException($"已存在名字为{user.Name}的用户");
+                lock (_lock)
+                {
+                    _storageService.Users.Add(user);
+                    _storageService.SaveChanges();
+                }
+            }
+
+            public (bool, string) IsUserExist(ref User user)
+            {
+                string name = user.Name;
+                var result = _storageService.Users.Where(x => x.Name == name);
+                if (!result.Any())
+                    return (false, "账号不存在");
+                if (result.First().HashSecret != ComputeHash(user.Secret))
+                    return (false, "密码不匹配");
+                user = (User)result.First().Clone();
+                return (true, "");
+            }
+
+            private string ComputeHash(string key)
+            {
+                if (key.IsNullOrEmpty())
+                    throw new ArgumentException("ComputeHash: Key is null or empty.");
+                return Convert.ToBase64String(
+                    SHA256.HashData(Encoding.UTF8.GetBytes(_salt + key + _salt))
+                );
+            }
+        }
+    }
+}