AndroidNativeStringEncryptLibrary
所属分类:加密解密
开发工具:C++
文件大小:0KB
下载次数:0
上传日期:2017-09-27 06:50:41
上 传 者:
sh-1993
说明: Android本机库(*.so),对字符串进行加密和解密,并对其进行编程以防止反编译。
(An Android native library (*.so) which encrypt decrypt string and proguard it to prevent decompile.)
文件列表:
app/ (0, 2017-09-26)
app/build.gradle (598, 2017-09-26)
app/proguard-rules.pro (928, 2017-09-26)
app/src/ (0, 2017-09-26)
app/src/main/ (0, 2017-09-26)
app/src/main/AndroidManifest.xml (760, 2017-09-26)
app/src/main/java/ (0, 2017-09-26)
app/src/main/java/com/ (0, 2017-09-26)
app/src/main/java/com/github/ (0, 2017-09-26)
app/src/main/java/com/github/maxwell/ (0, 2017-09-26)
app/src/main/java/com/github/maxwell/nc/ (0, 2017-09-26)
app/src/main/java/com/github/maxwell/nc/nativestrencrypt/ (0, 2017-09-26)
app/src/main/java/com/github/maxwell/nc/nativestrencrypt/MainActivity.java (985, 2017-09-26)
app/src/main/res/ (0, 2017-09-26)
app/src/main/res/layout/ (0, 2017-09-26)
app/src/main/res/layout/activity_main.xml (679, 2017-09-26)
app/src/main/res/mipmap-xhdpi/ (0, 2017-09-26)
app/src/main/res/mipmap-xhdpi/ic_launcher.png (4648, 2017-09-26)
app/src/main/res/mipmap-xhdpi/ic_launcher_round.png (7381, 2017-09-26)
app/src/main/res/values/ (0, 2017-09-26)
app/src/main/res/values/colors.xml (208, 2017-09-26)
app/src/main/res/values/strings.xml (79, 2017-09-26)
app/src/main/res/values/styles.xml (25, 2017-09-26)
build.gradle (553, 2017-09-26)
encryptlib/ (0, 2017-09-26)
encryptlib/build.gradle (583, 2017-09-26)
encryptlib/proguard-rules.pro (928, 2017-09-26)
encryptlib/src/ (0, 2017-09-26)
encryptlib/src/main/ (0, 2017-09-26)
encryptlib/src/main/AndroidManifest.xml (119, 2017-09-26)
encryptlib/src/main/java/ (0, 2017-09-26)
encryptlib/src/main/java/com/ (0, 2017-09-26)
encryptlib/src/main/java/com/github/ (0, 2017-09-26)
encryptlib/src/main/java/com/github/maxwell/ (0, 2017-09-26)
encryptlib/src/main/java/com/github/maxwell/nc/ (0, 2017-09-26)
encryptlib/src/main/java/com/github/maxwell/nc/encryptlib/ (0, 2017-09-26)
... ...
# Android字符串加密库
An Android native library (*.so) which encrypt/decrypt string and proguard it to prevent decompile.
## 特点 Feature
- 正版应用调用校验(防止二次打包等问题)
- 函数名及内容混淆
- 关键代码及字符串隐藏
- 支持自定义加密解密扩展
- 入口防止动态调试等等
## 预览 Preview
下面是正版应用调用展示:
![](https://github.com/maxwell-nc/AndroidNativeStringEncryptLibrary/blob/master/preview/1.jpg)
下面是非法应用调用结果(包名或签名不一致):
![](https://github.com/maxwell-nc/AndroidNativeStringEncryptLibrary/blob/master/preview/2.jpg)
下面是反编译后函数列表(混淆):
![](https://github.com/maxwell-nc/AndroidNativeStringEncryptLibrary/blob/master/preview/3.jpg)
下面是搜索关键数据(如加密密钥、加密后的数据):
![](https://github.com/maxwell-nc/AndroidNativeStringEncryptLibrary/blob/master/preview/4.jpg)
下面是关键代码片段反生成代码(加大反编译难度):
![](https://github.com/maxwell-nc/AndroidNativeStringEncryptLibrary/blob/master/preview/5.jpg)
## 用法 Usage
注意:下面均忽略JNI调用的通用步骤
1.配置你的应用签名及包名
打开Tools.cpp,修改替换sign和validPackage内容,比如签名为:-498576263,包名为:com.github.maxwell.nc.nativestrencrypt,则可以修改为如下代码:
```c
//正版签名hashcode,换签名请修改这个
//忽略hashcode碰撞问题(另外有包名校验)
//必须是使用tricks写法,直接int可以从so中静态反编译找到(容易被替换)
char* sign = (char[]){'-','4','9','8','5','7','6','2','6','3'};
int vaildSignHash = atoi(sign);
//正版包名
//可以任意分割,见nstrcat
const char* validPackage = nstrcat("com","co","m",".","gi","thub",".","max","we","ll",
".","nc",".","native","str","encrypt","com");
```
如果你不确定你的包名和签名,可以通过打开日志信息,观察日志中生成的hashcode和sign即为当前应用的签名hashcode及包名。
2.配置你的原生函数
由于是采用反射获取方法名称,需要通过配置regClazz(调用原生方法的包名)和gMethods(原生方法名、方法签名、函数指针),然后参考getSamplePass函数调用decryptStr方法进行解密:
```c
__attribute__((section ("datas")))
JNICALL jstring getSamplePass(JNIEnv *env, jclass clazz, jobject object){
//这里的 616263898b8a 为加密后的字符串(可以任意分割)
return decryptStr(env,object,"616","263","8","98","b8a",fakePass);
}
//要寻找的类:配置你的包名
static char regClazz[] = "com/github/maxwell/nc/encryptlib/EncryptUtils";
//要寻找的方法:配置你的方法
static JNINativeMethod gMethods[] = {
{ "getSamplePass", "(Ljava/lang/Object;)Ljava/lang/String;", (void*)getSamplePass },
};
```
3.调用原生方法
```java
String samplePass = EncryptUtils.getSamplePass(this);
```
如果错误则会返回预定义错误的字符串
4.特别注意!!!
源代码中加密解密方法随便写的,十分简单,不能用于实际应用。建议采用高强度加密解密算法(最好修改通用方法,加强安全)
## 进阶 Advance
打开日志信息
可以通过修改Tools.h中的宏定义:
```c
#define DEBUG true
```
修改预定义错误返回字符串
可以通过修改EncryptUtils.cpp中的decryptStr函数中的:
```c
char* failStr = (char[]){'e','r','r','o','r','\0'};
```
其他事项
暂时没想到,以后有空再补充。
Sorry, I have no empty time to translate this readme file into English.
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