rms-runtime-mobile-security/custom_scripts/iOS/ssl_pinning_bypass_iOS_12.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: SSL Pinning Bypass for iOS 12
 * OS: iOS
 * Author: Github @machoreverser / twitter @macho_reverser
 * Source: https://github.com/machoreverser/Frida-Scripts
 * Info: 
    iOS 12 SSL Bypass based on blog post 
    https://nabla-c0d3.github.io/blog/2019/05/18/ssl-kill-switch-for-ios12/
*************************************************************************/

// Variables
var SSL_VERIFY_NONE = 0;
var ssl_ctx_set_custom_verify;
var ssl_get_psk_identity;

/* Create SSL_CTX_set_custom_verify NativeFunction 
*  Function signature https://github.com/google/boringssl/blob/7540cc2ec0a5c29306ed852483f833c61eddf133/include/openssl/ssl.h#L2294
*/
var libboringssl = Process.getModuleByName("libboringssl.dylib");

ssl_ctx_set_custom_verify = new NativeFunction(
    libboringssl.findExportByName("SSL_CTX_set_custom_verify"),
    'void', ['pointer', 'int', 'pointer']
);

/* Create SSL_get_psk_identity NativeFunction 
* Function signature https://commondatastorage.googleapis.com/chromium-boringssl-docs/ssl.h.html#SSL_get_psk_identity
*/
ssl_get_psk_identity = new NativeFunction(
    libboringssl.findExportByName("SSL_get_psk_identity"),
    'pointer', ['pointer']
);

/** Custom callback passed to SSL_CTX_set_custom_verify */
function custom_verify_callback_that_does_not_validate(ssl, out_alert){
    return SSL_VERIFY_NONE;
}

/** Wrap callback in NativeCallback for frida */
var ssl_verify_result_t = new NativeCallback(function (ssl, out_alert){
    custom_verify_callback_that_does_not_validate(ssl, out_alert);
},'int',['pointer','pointer']);

Interceptor.replace(ssl_ctx_set_custom_verify, new NativeCallback(function(ssl, mode, callback) {
    //  |callback| performs the certificate verification. Replace this with our custom callback
    ssl_ctx_set_custom_verify(ssl, mode, ssl_verify_result_t);
}, 'void', ['pointer', 'int', 'pointer']));

Interceptor.replace(ssl_get_psk_identity, new NativeCallback(function(ssl) {
    return "notarealPSKidentity";
}, 'pointer', ['pointer']));
    
send("[+] iOS 12 SSL Pinning Bypass - successfully loaded");