The Universal SSL pinning bypass for Android applications

This article will cover:

1. Introduction to Frida and SSL pinning
2. Requirements
3. Setup and Installation
4. Frida Server Setup
5. Setup BurpSuite
6. Pushing the proxy’s CA Certificate:
7. Script injection to bypass SSL pinning
8. All stuff in a nutshell
9. Troubleshooting

https://codeshare.frida.re/@pcipolloni/universal-android-ssl-pinning-bypass-with-frida/

Frida CodeShare

or you can save this code as fridascript.js in same folder as adb.

/* 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-pausehttps://techblog.mediaservice.net/2017/07/universal-android-ssl-pinning-bypass-with-frida/ UPDATE 20191605: Fixed undeclared var. Thanks to @oleavr and @ehsanpc9999 ! */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...") var 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);