feat: 项目初始化 + 3D方块世界原型 + AI助搭系统

初始化 monorepo: Go后端(7微服务) + Unity客户端(9模块) + 启动器 HTML5原型: Three.js 3D体素世界, Perlin噪声地形, 原版材质, 22种方块 Minecraft创造模式背包: 双栏布局, 拖拽移动物品, 方向性元件引脚 AI助搭策划文档 + 客户端/服务端骨架 + Docker Compose + CI
2026-08-08 14:07:56 +08:00
parent 9500c4c80a
commit f70b061d1a
1972 changed files with 159760 additions and 6 deletions
@@ -0,0 +1,56 @@
+using System;
+using System.Security.Cryptography;
+
+namespace PCL.Core.Utils.Encryption
+{
+    public class AesGcmProvider : IEncryptionProvider
+    {
+        public static AesGcmProvider Instance { get; } = new();
+
+        private const int NonceSize = 12; // 96 bits
+        private const int TagSize = 16;   // 128 bits
+
+        public byte[] Encrypt(ReadOnlySpan<byte> data, ReadOnlySpan<byte> key)
+        {
+            byte[] nonce = new byte[NonceSize];
+            RandomNumberGenerator.Fill(nonce);
+
+            byte[] tag = new byte[TagSize];
+            byte[] ciphertext = new byte[data.Length];
+
+            using (var aesGcm = new AesGcm(key, TagSize))
+            {
+                aesGcm.Encrypt(nonce, data, ciphertext, tag);
+            }
+
+            // [Nonce(12)] [Tag(16)] [Ciphertext(n)]
+            byte[] result = new byte[NonceSize + TagSize + ciphertext.Length];
+            Buffer.BlockCopy(nonce, 0, result, 0, NonceSize);
+            Buffer.BlockCopy(tag, 0, result, NonceSize, TagSize);
+            Buffer.BlockCopy(ciphertext, 0, result, NonceSize + TagSize, ciphertext.Length);
+
+            return result;
+        }
+
+        public byte[] Decrypt(ReadOnlySpan<byte> data, ReadOnlySpan<byte> key)
+        {
+            if (data.Length < NonceSize + TagSize)
+                throw new ArgumentException("加密数据长度不足。");
+
+            ReadOnlySpan<byte> nonce = data.Slice(0, NonceSize);
+            ReadOnlySpan<byte> tag = data.Slice(NonceSize, TagSize);
+            ReadOnlySpan<byte> ciphertext = data.Slice(NonceSize + TagSize);
+
+            byte[] plaintext = new byte[ciphertext.Length];
+
+            using (var aesGcm = new AesGcm(key, TagSize))
+            {
+                aesGcm.Decrypt(nonce, ciphertext, tag, plaintext);
+            }
+
+            return plaintext;
+        }
+
+        public bool IsSupported { get => AesGcm.IsSupported; }
+    }
+}