图片和文本加密串最后加上10个随机数，解密时裁减掉

src/loaderplugin.js

@@ -93,6 +93,9 @@ if (CC_JSB) {
     function downloadText(item) {
         var url = item.url;
         var result = jsb.fileUtils.getStringFromFile(url);
+        if (result) {
+            result.substring(0, result.length - 10);
+        }
         if (typeof result === "string" && result) {
             return result;
         } else {
@@ -120,9 +123,10 @@ if (CC_JSB) {
     function downloadSrcText(item) {
         var url = item.url;
         var result = jsb.fileUtils.getStringFromFile(url);
-
+        if (result) {
+            result.substring(0, result.length - 10);
+        }
         if (typeof result === "string" && result) {
-            // return jsb.reflection.callStaticMethod("x/y/z/zz", "d", "(Ljava/lang/String;)Ljava/lang/String;", result);
             return Base64.decode(result);
         } else {
             return new Error("Download text failed: " + url);

src/tasks/ImageEncryptTask.ts

@@ -1,5 +1,6 @@
 import fs from "fs";
 import path from "path";
+import { RandomUtil } from "../utils/RandomUtil";
 import { TaskConfig } from "./TaskConfig";
 import { TaskInterface } from "./TaskInterface";
 
@@ -102,7 +103,6 @@ export class ImageEncryptTask implements TaskInterface {
             if (imgBuffer.toString().startsWith("data")) {
                 return;
             }
-
             let imgBase64String: string = "";
             switch (imgObj.type) {
                 case ImageType.PNG:
@@ -122,6 +122,8 @@ export class ImageEncryptTask implements TaskInterface {
                     break;
             }
             imgBase64String += imgBuffer.toString("base64");
+            // 最后加上10位随机数
+            imgBase64String += RandomUtil.randomString(10);
             fs.writeFileSync(imgObj.filePath, imgBase64String);
         });
     }

src/tasks/TextEncryptTask.ts

@@ -2,6 +2,7 @@ import fs from "fs";
 import path from "path";
 import { TaskConfig } from "./TaskConfig";
 import { TaskInterface } from "./TaskInterface";
+import { RandomUtil } from "../utils/RandomUtil";
 
 enum TextType {
     TXT,
@@ -73,9 +74,12 @@ export class TextEncryptTask implements TaskInterface {
      */
     private _encryptText(imgs: TextObject[]) {
         imgs.forEach((imgObj: TextObject) => {
-            let imgBuffer: Buffer = fs.readFileSync(imgObj.filePath);
-            let imgBase64String: string = imgBuffer.toString("base64");
-            fs.writeFileSync(imgObj.filePath, imgBase64String);
+            let buffer: Buffer = fs.readFileSync(imgObj.filePath);
+            let encodeText: string = buffer.toString("base64");
+            encodeText += RandomUtil.randomString(10);
+            fs.writeFileSync(imgObj.filePath, encodeText);
         });
+
+
     }
 }

src/utils/RandomUtil.ts

@@ -0,0 +1,10 @@
+export class RandomUtil {
+    private static _keys = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    static randomString(length: number): string {
+        let str = "";
+        for (let i = 0; i < length; i++) {
+            str += this._keys[Math.floor((this._keys.length - 1) * Math.random())];
+        }
+        return str;
+    }
+}