Frida，钩子 OKHttp 库不适用于示例

Question

我正在尝试使用 Frida 脚本挂钩 OKHttp 库的函数：

setTimeout(function(){
    Java.perform(function (){
        console.log("-- Hook OKHttp library --");

        try {
            var Builder = Java.use('okhttp3.CertificatePinner$Builder');
            var Pin = Java.use('okhttp3.CertificatePinner$Pin');
            var OkHttpClient = Java.use('okhttp3.OkHttpClient$Builder');
            console.log("OkHTTP classes found");


            Builder.add.overload.implementation = function(a, b) {
                console.log("TEST ADD");
            }

            Pin.matches.overload.implementation = function (a) {
                console.log("TEST matches")
                return true;
            }

            OkHttpClient.certificatePinner.overload.implementation = function (a) {
                console.log("TEST certificatePinner");
            }

            console.log("OkHTTP functions found");            
        } catch (err) {
            // If we dont have a ClassNotFoundException exception, raise the
            // problem encountered.
            console.log("OkHTTP 3.x classes/functions not Found");
        }

    });
},0);

我正在 Android 应用程序中执行以下代码：

            CertificatePinner certificatePinner = new CertificatePinner.Builder()
                    .add(certificateDNWildcard, certificateHash)
                    .build();
            //Create http client with pinned certificate
            OkHttpClient okHttpClient = new OkHttpClient.Builder()
                    .certificatePinner(certificatePinner)
                    .build();

如您所见，我正在调用我试图挂钩的函数 .add(certificateDNWildcard, certificateHash)。但是，当我执行此功能时，终端中没有打印任何内容。此外，我的终端的输出是：

-- Hook OKHttp library --
OkHTTP classes found
OkHTTP functions found

因此，它确实找到了类和函数；然而，钩子本身并不能有效地工作。有人可以帮我吗？

我正在使用：

* Frida 12.8.11
* Android 10
* ARM64

Answer 1

您应该：

// works if add method has a single implementation
Builder.add.implementation = function(a, b) {
    console.log("TEST ADD");
}

或

// always works
Builder.add.overload('java.lang.String', 'java.lang.String').implementation = function(a, b) {
    console.log("TEST ADD");
}

Frida，钩子 OKHttp 库不适用于示例

Frida, hook OKHttp Library does not work with examples

frida