【Android 学习记录】：针对Android 7.0 抓不到HTTPS包的情况

学习记录：针对Android 7.0 抓不到HTTPS包的情况

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背景

前段时间需要抓包，目前做https强证书校验的越来越多，手机升级之后，导致很多时候抓不到包，因此，总结一下抓包方法，这里基本没有自己研究的内容，都是从其他的博客搬过来汇总的

##环境：
1，一台root的手机
2，导出burp证书，push到sd安装—这一步就不介绍了，然后
cp /data/misc/user/0/cacerts-added/* /system/etc/security/cacerts/
这里记得要把权限改一下，否则没有权限读取chmod 644 /system/etc/security/cacerts/*
此时你已经可以抓到非强证书校验的报文了

抓包方案

1，root手机 安装xpose 使用justTrustme
参考链接：http://blog.csdn.net/qq_27446553/article/details/52525013

2，如果抓取的是第三方程序，免root可以可以使用VirtualXposed，仅hook被测试程序的证书校验部分
安装路径：https://github.com/android-hacker/VirtualXposed

3，root手机，安装Frida，使用以下脚本可以完成部分功能或针对被测程序进行定向hook
参考链接：（链接已经失效）https://jaq.alibaba.com/community/art/show?articleid=989
参考链接：【技术分享】使用Frida绕过Android SSL Re-Pinning
源代码：
https://techblog.mediaservice.net/wp-content/uploads/2017/07/frida-android-repinning_sa-1.js

/* 
   Android SSL Re-pinning frida script v0.2 030417-pier 

   $ adb push burpca-cert-der.crt /data/local/tmp/cert-der.crt
   $ frida -U -f it.app.mobile -l frida-android-repinning.js --no-pause

   https://techblog.mediaservice.net/2017/07/universal-android-ssl-pinning-bypass-with-frida/
*/

setTimeout(function(){
    Java.perform(function (){
    	console.log("");
	    console.log("[.] Cert Pinning Bypass/Re-Pinning");

	    var CertificateFactory = Java.use("java.security.cert.CertificateFactory");
	    var FileInputStream = Java.use("java.io.FileInputStream");
	    var BufferedInputStream = Java.use("java.io.BufferedInputStream");
	    var X509Certificate = Java.use("java.security.cert.X509Certificate");
	    var KeyStore = Java.use("java.security.KeyStore");
	    var TrustManagerFactory = Java.use("javax.net.ssl.TrustManagerFactory");
	    var SSLContext = Java.use("javax.net.ssl.SSLContext");

	    // Load CAs from an InputStream
	    console.log("[+] Loading our CA...")
	    cf = CertificateFactory.getInstance("X.509");
	    
	    try {
	    	var fileInputStream = FileInputStream.$new("/data/local/tmp/cert-der.crt");
	    }
	    catch(err) {
	    	console.log("[o] " + err);
	    }
	    
	    var bufferedInputStream = BufferedInputStream.$new(fileInputStream);
	  	var ca = cf.generateCertificate(bufferedInputStream);
	    bufferedInputStream.close();

		var certInfo = Java.cast(ca, X509Certificate);
	    console.log("[o] Our CA Info: " + certInfo.getSubjectDN());

	    // Create a KeyStore containing our trusted CAs
	    console.log("[+] Creating a KeyStore for our CA...");
	    var keyStoreType = KeyStore.getDefaultType();
	    var keyStore = KeyStore.getInstance(keyStoreType);
	    keyStore.load(null, null);
	    keyStore.setCertificateEntry("ca", ca);
	    
	    // Create a TrustManager that trusts the CAs in our KeyStore
	    console.log("[+] Creating a TrustManager that trusts the CA in our KeyStore...");
	    var tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
	    var tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
	    tmf.init(keyStore);
	    console.log("[+] Our TrustManager is ready...");

	    console.log("[+] Hijacking SSLContext methods now...")
	    console.log("[-] Waiting for the app to invoke SSLContext.init()...")

	   	SSLContext.init.overload("[Ljavax.net.ssl.KeyManager;", "[Ljavax.net.ssl.TrustManager;", "java.security.SecureRandom").implementation = function(a,b,c) {
	   		console.log("[o] App invoked javax.net.ssl.SSLContext.init...");
	   		SSLContext.init.overload("[Ljavax.net.ssl.KeyManager;", "[Ljavax.net.ssl.TrustManager;", "java.security.SecureRandom").call(this, a, tmf.getTrustManagers(), c);
	   		console.log("[+] SSLContext initialized with our custom TrustManager!");
	   	}
    });
},0);

但是上面的内容也不是很全，比如缺少okhttp，缺少webview等，可以自己维护一个比较全面的

4，重打包：不推荐，目前大部分应用对重打包防护比较好，不推荐重打包