228 lines
7.6 KiB
C#
228 lines
7.6 KiB
C#
using UnityEngine;
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using System.Collections.Generic;
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using System.Reflection;
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using LuaInterface;
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using System;
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using System.IO;
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using UnityEditor;
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using System.Security.Cryptography;
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namespace GameLogic {
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public static class MEncyptUtil {
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//
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//异或加密
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static byte[] crypt(byte[] data, string key)
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{
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byte[] cl = System.Text.Encoding.Default.GetBytes(key);
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byte[] r = new byte[data.Length];
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for (long i = 0; i < data.Length; i++)
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{
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if (i % 4 == 0)
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{
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r[i] = BitConverter.GetBytes(data[i] ^ cl[i % cl.Length])[0];
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}
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else
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{
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r[i] = data[i];
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}
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}
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return r;
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}
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// AES加密
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static byte[] encryptAES(byte[] data, string key)
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{
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RijndaelManaged rij = new RijndaelManaged();
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rij.Key = System.Text.Encoding.Default.GetBytes(key);
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rij.Mode = CipherMode.ECB;
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rij.Padding = PaddingMode.PKCS7;
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ICryptoTransform ctr = rij.CreateEncryptor();
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return ctr.TransformFinalBlock(data, 0, data.Length);
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}
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static byte[] decryptAES(byte[] data, string key)
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{
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RijndaelManaged rij = new RijndaelManaged();
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rij.Key = System.Text.Encoding.Default.GetBytes(key);
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rij.Mode = CipherMode.ECB;
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rij.Padding = PaddingMode.PKCS7;
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ICryptoTransform ctr = rij.CreateDecryptor();
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return ctr.TransformFinalBlock(data, 0, data.Length);
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}
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// 头部混淆
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static byte[] encryptHead(byte[] data, string key)
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{
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byte[] cl = System.Text.Encoding.Default.GetBytes(key);
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byte[] r = new byte[data.Length + cl.Length];
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long x = 0;
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for (long i = 0; i < cl.Length; i++)
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{
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r[x++] = cl[i];
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}
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for (long i = 0; i < data.Length; i++)
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{
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r[x++] = data[i];
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}
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return r;
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}
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// 头部混淆
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static byte[] decryptHead(byte[] data, string key)
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{
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byte[] cl = System.Text.Encoding.Default.GetBytes(key);
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byte[] r = new byte[data.Length - cl.Length];
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long x = 0;
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for (long i = cl.Length; i < data.Length; i++)
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{
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r[x++] = data[i];
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}
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return r;
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}
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// 加载AB包
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public static byte[] DecyptAB(byte[] data, string key, ulong offset)
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{
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byte[] rb ;
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//System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
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//sw.Start();
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if (key == null || key == "")
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{
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rb = data;
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}
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else {
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rb = decryptHead(data, key);
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}
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//Debug.Log("_"+sw.Elapsed.TotalMilliseconds);
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byte[] r = new byte[rb.Length - (int)offset];
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for (int i = (int)offset; i < rb.Length; i++)
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{
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r[i - (int)offset] = rb[i];
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}
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//Debug.Log("_"+sw.Elapsed.TotalMilliseconds);
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//sw.Stop();
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return r;
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}
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// 文件加密
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public static void EncyptAB(string path, string key)
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{
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// 闪屏先不加密了
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if (Path.GetFileName(path).Contains("splashpanel"))
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{
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return;
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}
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if (key == null || key == "")
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{
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return;
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}
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if (!File.Exists(path))
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{
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return;
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}
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byte[] data = File.ReadAllBytes(path);
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byte[] rb = encryptHead(data, key);
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File.WriteAllBytes(path, rb);
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}
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public static AssetBundle LoadAssetBundle(string path, string encryptKey, ulong offset)
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{
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AssetBundle ab;
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if (AppConst.PlatformPath.Equals("Android"))
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{
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ab = AssetBundle.LoadFromFile(path, 0, offset);
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}
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else
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{
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//ab = AssetBundle.LoadFromMemory(DecyptAB(File.ReadAllBytes(path), encryptKey, offset));
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if (encryptKey == null) encryptKey = "";
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byte[] cl = System.Text.Encoding.Default.GetBytes(encryptKey);
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ab = AssetBundle.LoadFromFile(path, 0, (ulong)(cl.Length + (int)offset));
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}
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return ab;
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}
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public static AssetBundleCreateRequest LoadAssetBundleAsync(string path, string encryptKey, ulong offset)
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{
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AssetBundleCreateRequest ab;
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if (AppConst.PlatformPath.Equals("Android"))
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{
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ab = AssetBundle.LoadFromFileAsync(path, 0, offset);
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}
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else
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{
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//ab = AssetBundle.LoadFromMemoryAsync(DecyptAB(File.ReadAllBytes(path), encryptKey, offset));
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byte[] cl = System.Text.Encoding.Default.GetBytes(encryptKey);
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ab = AssetBundle.LoadFromFileAsync(path, 0, (ulong)(cl.Length + (int)offset));
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}
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return ab;
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}
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//[MenuItem("Build/TEST")]
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static void Test()
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{
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AssetBundle.UnloadAllAssetBundles(true);
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System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
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sw.Start();
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byte[] b = File.ReadAllBytes("/Users/ljsd/Documents/JieLing/Packager/IOS/TCX_CN_XIPU/Data/Raw/IOS/lz4_atlas_dyact_activity4.unity3d");
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Debug.Log(sw.Elapsed.TotalMilliseconds);
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byte[] d = DecyptAB(b, "ae125efkk4_54eeff444ferfkny6oxi8", 128);
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Debug.Log(sw.Elapsed.TotalMilliseconds);
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//AssetBundle.LoadFromMemory(d);
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//Debug.Log(sw.Elapsed.TotalMilliseconds);
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sw.Stop();
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// //AssetBundle.UnloadAllAssetBundles(true);
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// //sw.Start();
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// //AssetBundle.LoadFromFile("/Users/ljsd/Documents/JieLing/UnityProject/JL_china_ios/BuildABs/IOS/lz4_atlas_dyact_activity4.unity3d", 0, 128);
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// //Debug.Log(sw.Elapsed.TotalMilliseconds);
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// //sw.Stop();
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// //AssetBundle.UnloadAllAssetBundles(true);
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// //sw.Start();
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// //byte[] bb = File.ReadAllBytes("/Users/ljsd/Documents/JieLing/UnityProject/JL_china_ios/BuildABs/IOS/lz4_atlas_dyact_activity4.unity3d");
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// //Debug.Log(sw.Elapsed.TotalMilliseconds);
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// //byte[] dd = DecyptAB(bb, "", 128);
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// //Debug.Log(sw.Elapsed.TotalMilliseconds);
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// //AssetBundle.LoadFromMemory(dd);
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// //Debug.Log(sw.Elapsed.TotalMilliseconds);
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// //sw.Stop();
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}
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//[MenuItem("Build/TEST2")]
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static void load()
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{
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byte[] a = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
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string s = "";
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for (int i = 0; i < a.Length; i++)
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{
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s += a[i];
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}
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XDebug.Log.l("a = " + s);
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byte[] b = encryptHead(a, "ae125efkk4_54eeff444ferfkny6oxi8");
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s = "";
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for (int i = 0; i < b.Length; i++)
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{
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s += b[i];
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}
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XDebug.Log.l("b = " + s);
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byte[] c = decryptHead(b, "ae125efkk4_54eeff444ferfkny6oxi8");
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s = "";
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for (int i = 0; i < c.Length; i++)
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{
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s += c[i];
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}
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XDebug.Log.l("c = " + s);
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//File.ReadAllBytes("");
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}
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}
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} |