原生文件加密/解密

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/BuildTasks/TaskEncryption_RFBP.cs

@@ -0,0 +1,23 @@
+
+namespace YooAsset.Editor
+{
+    public class TaskEncryption_RFBP : TaskEncryption, IBuildTask
+    {
+        /// <summary>
+        /// 加密文件
+        /// </summary>
+        /// <param name="context"></param>
+        public void Run(BuildContext context)
+        {
+            var buildParameters = context.GetContextObject<BuildParametersContext>();
+            var buildMapContext = context.GetContextObject<BuildMapContext>();
+
+            var buildMode = buildParameters.Parameters.BuildMode;
+
+            if (buildMode == EBuildMode.ForceRebuild || buildMode == EBuildMode.IncrementalBuild)
+            {
+                EncryptingBundleFiles(buildParameters, buildMapContext);
+            }
+        }
+    }
+}

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/BuildTasks/TaskEncryption_RFBP.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b3e156139dcc25f4c9440ec3d6cb96d2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/RawFileBuildPipeline.cs

@@ -32,6 +32,7 @@ namespace YooAsset.Editor
                     new TaskPrepare_RFBP(),
                     new TaskGetBuildMap_RFBP(),
                     new TaskBuilding_RFBP(),
+                    new TaskEncryption_RFBP(),
                     new TaskUpdateBundleInfo_RFBP(),
                     new TaskCreateManifest_RFBP(),
                     new TaskCreateReport_RFBP(),

Assets/YooAsset/Runtime/FileSystem/DefaultBuildinFileSystem/DefaultBuildinFileSystem.cs

@@ -2,6 +2,7 @@
 using System.IO;
 using System.Collections.Generic;
 using UnityEngine;
+using System.Text;
 
 namespace YooAsset
 {
@@ -267,7 +268,17 @@ namespace YooAsset
                 return null;
 
             string filePath = GetBuildinFileLoadPath(bundle);
-            return FileUtility.ReadAllBytes(filePath);
+            var data = FileUtility.ReadAllBytes(filePath);
+            if (bundle.Encrypted)
+            {
+                if (DecryptionServices == null)
+                {
+                    YooLogger.Error($"DecryptionServices is Null!");
+                    return null;
+                }
+                return DecryptionServices.ReadFileData(data);
+            }
+            return data;
         }
         public virtual string ReadFileText(PackageBundle bundle)
         {
@@ -278,7 +289,18 @@ namespace YooAsset
                 return null;
 
             string filePath = GetBuildinFileLoadPath(bundle);
-            return FileUtility.ReadAllText(filePath);
+            var data = FileUtility.ReadAllBytes(filePath);
+
+            if (bundle.Encrypted)
+            {
+                if (DecryptionServices == null)
+                {
+                    YooLogger.Error($"DecryptionServices is Null!");
+                    return null;
+                }
+                data = DecryptionServices.ReadFileData(data);
+            }
+            return Encoding.UTF8.GetString(data);
         }
 
         #region 内部方法

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/DefaultCacheFileSystem.cs

@@ -3,6 +3,7 @@ using System.IO;
 using System.Collections.Generic;
 using System.Linq;
 using UnityEngine;
+using System.Text;
 
 namespace YooAsset
 {
@@ -316,9 +317,19 @@ namespace YooAsset
         {
             if (Exists(bundle) == false)
                 return null;
-
             string filePath = GetCacheFileLoadPath(bundle);
-            return FileUtility.ReadAllBytes(filePath);
+            var data = FileUtility.ReadAllBytes(filePath);
+
+            if (bundle.Encrypted)
+            {
+                if (DecryptionServices == null)
+                {
+                    YooLogger.Error($"DecryptionServices is Null!");
+                    return null;
+                }
+                return DecryptionServices.ReadFileData(data);
+            }
+            return data;
         }
         public virtual string ReadFileText(PackageBundle bundle)
         {
@@ -326,7 +337,18 @@ namespace YooAsset
                 return null;
 
             string filePath = GetCacheFileLoadPath(bundle);
-            return FileUtility.ReadAllText(filePath);
+            var data = FileUtility.ReadAllBytes(filePath);
+
+            if (bundle.Encrypted)
+            {
+                if (DecryptionServices == null)
+                {
+                    YooLogger.Error($"DecryptionServices is Null!");
+                    return null;
+                }
+                data = DecryptionServices.ReadFileData(data);
+            }
+            return Encoding.UTF8.GetString(data);
         }
 
         #region 内部方法

Assets/YooAsset/Runtime/InitializeParameters.cs

@@ -124,13 +124,14 @@ namespace YooAsset
         /// </summary>
         /// <param name="verifyLevel">缓存文件的校验等级</param>
         /// <param name="rootDirectory">内置文件的根路径</param>
-        public static FileSystemParameters CreateDefaultBuildinRawFileSystemParameters(EFileVerifyLevel verifyLevel = EFileVerifyLevel.Middle, string rootDirectory = null)
+        public static FileSystemParameters CreateDefaultBuildinRawFileSystemParameters(IDecryptionServices decryptionServices = null, EFileVerifyLevel verifyLevel = EFileVerifyLevel.Middle, string rootDirectory = null)
         {
             string fileSystemClass = typeof(DefaultBuildinFileSystem).FullName;
             var fileSystemParams = new FileSystemParameters(fileSystemClass, rootDirectory);
             fileSystemParams.AddParameter(FILE_VERIFY_LEVEL, verifyLevel);
             fileSystemParams.AddParameter(APPEND_FILE_EXTENSION, true);
             fileSystemParams.AddParameter(RAW_FILE_BUILD_PIPELINE, true);
+            fileSystemParams.AddParameter(DECRYPTION_SERVICES, decryptionServices);
             return fileSystemParams;
         }
 
@@ -156,7 +157,7 @@ namespace YooAsset
         /// <param name="remoteServices">远端资源地址查询服务类</param>
         /// <param name="verifyLevel">缓存文件的校验等级</param>
         /// <param name="rootDirectory">文件系统的根目录</param>
-        public static FileSystemParameters CreateDefaultCacheRawFileSystemParameters(IRemoteServices remoteServices, EFileVerifyLevel verifyLevel = EFileVerifyLevel.Middle, string rootDirectory = null)
+        public static FileSystemParameters CreateDefaultCacheRawFileSystemParameters(IRemoteServices remoteServices, IDecryptionServices decryptionServices = null, EFileVerifyLevel verifyLevel = EFileVerifyLevel.Middle, string rootDirectory = null)
         {
             string fileSystemClass = typeof(DefaultCacheFileSystem).FullName;
             var fileSystemParams = new FileSystemParameters(fileSystemClass, rootDirectory);
@@ -164,6 +165,7 @@ namespace YooAsset
             fileSystemParams.AddParameter(FILE_VERIFY_LEVEL, verifyLevel);
             fileSystemParams.AddParameter(APPEND_FILE_EXTENSION, true);
             fileSystemParams.AddParameter(RAW_FILE_BUILD_PIPELINE, true);
+            fileSystemParams.AddParameter(DECRYPTION_SERVICES, decryptionServices);
             return fileSystemParams;
         }
 

Assets/YooAsset/Runtime/Services/IDecryptionServices.cs

@@ -34,5 +34,12 @@ namespace YooAsset
         /// 注意：加载流对象在资源包对象释放的时候会自动释放
         /// </summary>
         AssetBundleCreateRequest LoadAssetBundleAsync(DecryptFileInfo fileInfo, out Stream managedStream);
+
+        /// <summary>
+        /// 解密字节数据
+        /// </summary>
+        /// <param name="encryptData"></param>
+        /// <returns></returns>
+        public byte[] ReadFileData(byte[] encryptData);
     }
 }