rms-runtime-mobile-security/custom_scripts/Android/ssl_pinning_uni_bypass_CA.js

Runtime Mobile Security (RMS), powered by FRIDA, is a powerful web interface that helps you to manipulate Android and iOS Apps at Runtime

/************************************************************************
 * Name: Universal SSL Pinning Bypass with CA
 * OS: Android
 * Author: Piergiovanni Cipolloni (Mediaservice)
 * Source: https://techblog.mediaservice.net/2017/07/universal-android-ssl-pinning-bypass-with-frida/
 * Info:
   $ adb push burpca-cert-der.crt /data/local/tmp/cert-der.crt
   $ frida -U -f it.app.mobile -l ssl_pinning_bypass_with_CA.js --no-pause
 *************************************************************************/


setTimeout(function(){
    Java.perform(function (){
    	send("");
	    send("[.] 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
	    send("[+] Loading our CA...")
	    var cf = CertificateFactory.getInstance("X.509");
	    
	    try {
	    	var fileInputStream = FileInputStream.$new("/data/local/tmp/cert-der.crt");
	    }
	    catch(err) {
	    	send("[o] " + err);
	    }
	    
	    var bufferedInputStream = BufferedInputStream.$new(fileInputStream);
	  	var ca = cf.generateCertificate(bufferedInputStream);
	    bufferedInputStream.close();

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

	    // Create a KeyStore containing our trusted CAs
	    send("[+] 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
	    send("[+] Creating a TrustManager that trusts the CA in our KeyStore...");
	    var tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
	    var tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
	    tmf.init(keyStore);
	    send("[+] Our TrustManager is ready...");

	    send("[+] Hijacking SSLContext methods now...")
	    send("[-] 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) {
	   		send("[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);
	   		send("[+] SSLContext initialized with our custom TrustManager!");
	   	}
    });
},0);