【Android 學習記錄】：針對Android 7.0 抓不到HTTPS包的情況

學習記錄：針對Android 7.0 抓不到HTTPS包的情況

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背景

前段時間需要抓包，目前做https強證書校驗的越來越多，手機升級之後，導致很多時候抓不到包，因此，總結一下抓包方法，這裏基本沒有自己研究的內容，都是從其他的博客搬過來彙總的

##環境：
1，一臺root的手機
2，導出burp證書，push到sd安裝—這一步就不介紹了，然後
cp /data/misc/user/0/cacerts-added/* /system/etc/security/cacerts/
這裏記得要把權限改一下，否則沒有權限讀取chmod 644 /system/etc/security/cacerts/*
此時你已經可以抓到非強證書校驗的報文了

抓包方案

1，root手機 安裝xpose 使用justTrustme
參考鏈接：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，僅hook被測試程序的證書校驗部分
安裝路徑：https://github.com/android-hacker/VirtualXposed

3，root手機，安裝Frida，使用以下腳本可以完成部分功能或針對被測程序進行定向hook
參考鏈接：（鏈接已經失效）https://jaq.alibaba.com/community/art/show?articleid=989
參考鏈接：【技術分享】使用Frida繞過Android SSL Re-Pinning
源代碼：
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);

但是上面的內容也不是很全，比如缺少okhttp，缺少webview等，可以自己維護一個比較全面的

4，重打包：不推薦，目前大部分應用對重打包防護比較好，不推薦重打包