Square CTF 2023-There Is A bug

唉，主动调用往往只需要最朴素的方法：

1702305271114

context是上下文啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊

frida：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Java.perform(function () {
    var MainActivity = Java.use('com.example.authenticator.MainActivity');

    MainActivity.onCreate.implementation = function () {
        // 调用原始的onCreate方法
        this.onCreate.apply(this, arguments);

        // 获取ActivityMainBinding实例
        var binding = this.binding.value;
        var tvInstance = binding.sampleText.value;
        var etInstance = binding.editTextTextPassword.value;
        var sharedPreferences = this.getSharedPreferences.overload('java.lang.String', 'int').call(this, 'file.txt', 0);

        var result = this.getFlag(tvInstance, etInstance, this, sharedPreferences);

        console.log('getFlag result:', result);
    };
});