Project: ssl-pinning-bypass-okhttp4

Try this code out now by running 

$ frida --codeshare kooroshh/ssl-pinning-bypass-okhttp4 -f YOUR_BINARY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
//adb push cert-der.crt /data/local/tmp/cert-der.crt
//frida -U -f com.dummy.ssl --codeshare kooroshh/ssl-pinning-bypass-okhttp4 --no-pause
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!");
}
// okhttp4
try {
var CertificatePinner = Java.use('okhttp3.CertificatePinner');
CertificatePinner.check.overload('java.lang.String', 'java.util.List').implementation = function(str) {
console.log('! Intercepted okhttp4: ' + str);
return;
};
try {
CertificatePinner.check$okhttp.overload('java.lang.String', 'kotlin.jvm.functions.Function0').implementation = function(str, _) {
console.log('! Intercepted okhttp4: ' + str);
return;
};
} catch (ex) {
console.log("is this Okhttp3 ?!");
}
console.log('* Setup okhttp4 pinning')
} catch (err) {
console.log('* Unable to hook into okhttp4 pinner')
console.log(err);
}
// TrustManagerImpl
try {
var TrustManagerImpl = Java.use('com.android.org.conscrypt.TrustManagerImpl');
TrustManagerImpl.verifyChain.implementation = function(untrustedChain, trustAnchorChain, host, clientAuth, ocspData, tlsSctData) {
console.log('! Intercepted TrustManagerImp: ' + host);
return untrustedChain;
}
console.log('* Setup TrustManagerImpl pinning')
} catch (err) {
console.log('* Unable to hook into TrustManagerImpl')
}
});
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Fingerprint: 146345b666d96a051900c7a25466fd2ab20529a10056535e32014217116e7829