import frida, sys
 
def on_message(message, data):
    if message['type'] == 'send':
        print("[*] {0}".format(message['payload']))
    else:
        print(message)
 
 
PACKAGE_NAME = "sg.vantagepoint.uncrackable2"
 
jscode= """

    Java.perform(function() {
        console.log("[*] Hooking calls to System.exit");
        exitClass = Java.use("java.lang.System");
        exitClass.exit.implementation = function() {
            console.log("[*] System.exit called");
        }

        var strncmp = undefined;
        func = Module.enumerateImportsSync("libfoo.so");

        for(i = 0; i < func.length; i++) {
        if(func[i].name == "strncmp") {
                strncmp = func[i].address;
                break;
            }

        }

        Interceptor.attach(strncmp, {
            onEnter: function (args) {
               if(args[2].toInt32() == 23 && Memory.readUtf8String(args[0],23) == "01234567890123456789012") {
                    console.log("[*] Secret string at " + args[1] + ": " + Memory.readUtf8String(args[1],23));
                }
             },
        });
        console.log("[*] Intercepting strncmp");
    });

"""

try:
    device = frida.get_usb_device(timeout=10)
    pid = device.spawn([PACKAGE_NAME])  
    process = device.attach(pid)
    device.resume(pid)
    script = process.create_script(jscode)
    script.on('message',on_message)
    print('[*] Running Hook')
    script.load()
    sys.stdin.read()
except Exception as e:
    print(e)