unity3dandroid签名,Unity开发中验证Android签名
在开发的过程中为了apk的安全，最好在apk运⾏的最开始进⾏签名的验证，防⽌被⼈反编译后重新打包运⾏，下⾯就在 C# 中展⽰如何在unity 进⾏签名的认证：
using System;
using System.Text;
using UnityEngine;
public class CheckSignatureUtils
{
// 请替换成⾃⼰游戏的签名
public static string signatureNormal = "AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0";
// 特殊渠道签名，他们⼀般会⼆次签名
public static string signatureBili = "AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0";
public static string signatureUc = "AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0:AA:C0";
public static void CheckSignature(string channel)
{
#if UNITY_ANDROID && !UNITY_EDITOR
//5.X以上版本 com.unity3d.player.UnityPlayerActivity
//5.X以下版本 com.unity3d.player.UnityPlayerNativeActivity
var player = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
var activity = player.GetStatic("currentActivity");
var PackageManager = new AndroidJavaClass("t.pm.PackageManager");
var packageName = activity.Call("getPackageName");
var GET_SIGNATURES = PackageManager.GetStatic("GET_SIGNATURES");
var packageManager = activity.Call("getPackageManager");
var packageInfo = packageManager.Call("getPackageInfo", packageName, GET_SIGNATURES);
var signatures = packageInfo.Get("signatures");
if (signatures != null && signatures.Length > 0)
{
byte[] bytes = signatures[0].Call("toByteArray");
var md5String = GetMD5(bytes);
md5String = md5String.ToUpper();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < md5String.Length; ++i)
{
if (i > 0 && i % 2 == 0)
android获取真正的签名{
sb.Append(':');
}
sb.Append(md5String[i]);
}
string signatureStr = sb.ToString();
CheckeSignatureStr(channel, signatureStr);
}
#endif
}
private static string GetMD5(byte[] bytedata)
{
try
{
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte[] retVal = md5.ComputeHash(bytedata);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
{
sb.Append(retVal[i].ToString("x2"));
}
return sb.ToString();
}
catch (Exception ex)
{
throw new Exception("GetMD5 fail,error:" + ex.Message);
}
}
//在这⾥进⾏特殊渠道的特殊处理
private static void CheckeSignatureStr(string channel , string signatureStr)
{
Debug.Log(" channel," + channel + ",signatureStr:" + signatureStr);
if (signatureStr.Equals(signatureNormal ))
{
Debug.Log("签名验证正常");
}
else if (channel.Equals("bili") && signatureStr.Equals(signatureBili))
{
Debug.Log("B站签名验证正常");
}
else if (channel.Equals("uc") && signatureStr.Equals(signatureUc))
{
Debug.Log("UC签名验证正常");
}
else {
Debug.Log("签名异常");
Application.Quit();
}
}
}
接下来展⽰如何获取签名⽂件的MD5
2种⽅式：
如果只有apk包的话，⽤keytool 命令⾏获取。把apk包解压，进⼊ META-INF ⽬录下，拿到 .RSA结尾的⽂件，命令：keytool -printcert -file "RSA 路径\xxx.RSA"
如果有签名，直接通过keystore 签名⽂件获取
keytool -list -v -keystore "keystore 路径\xxx.keystore"
输⼊密码即可

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