This project forked from ksxkq/checksignatureinnativesample
展示如何在 native 层检测应用签名，防止二次打包
#CheckSignatureInNativeSample
安全 这个问题就不多讲了，没有绝对的安全，我们能做的只是增加破解难度。
这两天看了一下如何防止二次打包，发现可以通过检测 App 签名的方式来判断是被修改。直接在 Java 层判断很容易，调用现有接口，然后判断就行了，但是这样很容易被别人反编译然后破解掉。但是如果放在 native 层检测的话，会稍微安全一些。
所以这里把这几天收集的资料整理成了一个 demo，希望对大家有所帮助。
因为刚接触 JNI，所以如果内容有什么错误的地方，希望大家指出，帮助改正。
如果 App 被别人二次打包，那就让 App 无法启动。
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