From 492cb45c0209fdddf67490289ed1d2c6c1bfe203 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Tue, 18 Mar 2025 13:22:50 +0800
Subject: [PATCH] increase key length

---
 .../java/com/donut/mixfile/server/routes/UploadRoute.kt     | 2 +-
 app/src/main/java/com/donut/mixfile/server/utils/Util.kt    | 3 ++-
 app/src/main/java/com/donut/mixfile/ui/routes/About.kt      | 6 ++++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/com/donut/mixfile/server/routes/UploadRoute.kt b/app/src/main/java/com/donut/mixfile/server/routes/UploadRoute.kt
index ea7c899..0ac2ab4 100644
--- a/app/src/main/java/com/donut/mixfile/server/routes/UploadRoute.kt
+++ b/app/src/main/java/com/donut/mixfile/server/routes/UploadRoute.kt
@@ -32,7 +32,7 @@ var UPLOAD_TASK_COUNT by cachedMutableOf(10, "upload_task_count")
 
 fun getUploadRoute(): RoutingHandler {
     return route@{
-        val key = generateRandomByteArray(16)
+        val key = generateRandomByteArray(32)
         val name = call.request.queryParameters["name"]
         val add = call.request.queryParameters["add"] ?: "true"
         if (name.isNullOrEmpty()) {
diff --git a/app/src/main/java/com/donut/mixfile/server/utils/Util.kt b/app/src/main/java/com/donut/mixfile/server/utils/Util.kt
index fdfd2b4..447bb3c 100644
--- a/app/src/main/java/com/donut/mixfile/server/utils/Util.kt
+++ b/app/src/main/java/com/donut/mixfile/server/utils/Util.kt
@@ -3,6 +3,7 @@ package com.donut.mixfile.server.utils
 import android.graphics.Bitmap
 import android.graphics.Canvas
 import android.graphics.Color
+import androidx.core.graphics.createBitmap
 import com.donut.mixfile.util.genRandomString
 import com.donut.mixfile.util.generateRandomByteArray
 import com.donut.mixfile.util.ignoreError
@@ -33,7 +34,7 @@ fun createBlankBitmap(
     width: Int = Random.nextInt(50, 100),
     height: Int = Random.nextInt(50, 100),
 ): Bitmap {
-    val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
+    val bitmap = createBitmap(width, height)
     val canvas = Canvas(bitmap)
     canvas.drawColor(Color.rgb(Random.nextInt(255), Random.nextInt(255), Random.nextInt(255)))
     return bitmap
diff --git a/app/src/main/java/com/donut/mixfile/ui/routes/About.kt b/app/src/main/java/com/donut/mixfile/ui/routes/About.kt
index d1f9470..eea93cb 100644
--- a/app/src/main/java/com/donut/mixfile/ui/routes/About.kt
+++ b/app/src/main/java/com/donut/mixfile/ui/routes/About.kt
@@ -131,12 +131,14 @@ val About = MixNavPage(
             color = Color.Gray,
             text = """
         MixFile采用混合式文件加密上传系统
-        您上传的所有文件都会使用AES-GCM-128算法加密,
-        上传时会生成随机的128位密钥在本地进行加密后进行上传,
+        您上传的所有文件都会使用AES-GCM算法加密,
+        上传时会生成随机的256位密钥在本地进行加密后进行上传,
         只要不泄漏分享码,文件内容是无法被任何人得知的
+        256位密钥可确保即使是在未来使用量子计算机也无法破解
         分享码中包含了,文件地址，文件大小,加密使用的密钥等信息
         分享码默认使用不可见字符隐写到普通文本中进行编码信息
         如果长度超过发送限制可关闭使用短分享码功能
+        如果分享码丢失，上传的文件将永远无法找回
         请把应用省电改为无限制,否则文件服务器可能无法在后台运行
         开启自启动权限后,关闭主页面时将会自动在后台运行服务器
     """.trimIndent()