关于frida用在抓包上

一.Frida实现okhttp3.Interceptor 

　　　转自：https://bbs.pediy.com/thread-252129.htm

　　注意：

1.最好不要有xposed环境
2.启动方式 frida -U -l yang.js -f xxx --no-pause

 代码：

function hook_okhttp3(classLoader) {
    Java.perform(function () {
        var ByteString = classLoader.use("com.android.okhttp.okio.ByteString");
        var Buffer = classLoader.use("com.android.okhttp.okio.Buffer");
        var Interceptor = classLoader.use("okhttp3.Interceptor");
        var MyInterceptor = Java.registerClass({
            name: "okhttp3.MyInterceptor",
            implements: [Interceptor],
            methods: {
                intercept: function (chain) {
                    var request = chain.request();
                    try {
                        console.log("MyInterceptor.intercept onEnter:", request, "
request headers:
", request.headers());
                        var requestBody = request.body();
                        var contentLength = requestBody ? requestBody.contentLength() : 0;
                        if (contentLength > 0) {
                            var BufferObj = Buffer.$new();
                            requestBody.writeTo(BufferObj);
                            try {
                                console.log("
request body String:
", BufferObj.readString(), "
");
                            } catch (error) {
                                try {
                                    console.log("
request body ByteString:
", ByteString.of(BufferObj.readByteArray()).hex(), "
");
                                } catch (error) {
                                    console.log("error 1:", error);
                                }
                            }
                        }
                    } catch (error) {
                        console.log("error 2:", error);
                    }
                    var response = chain.proceed(request);
                    try {
                        console.log("MyInterceptor.intercept onLeave:", response, "
response headers:
", response.headers());
                        var responseBody = response.body();
                        var contentLength = responseBody ? responseBody.contentLength() : 0;
                        if (contentLength > 0) {
                            console.log("
responsecontentLength:", contentLength, "responseBody:", responseBody, "
");

                            var ContentType = response.headers().get("Content-Type");
                            console.log("ContentType:", ContentType);
                            if (ContentType.indexOf("video") == -1) {
                                if (ContentType.indexOf("application") == 0) {
                                    var source = responseBody.source();
                                    if (ContentType.indexOf("application/zip") != 0) {
                                        try {
                                            console.log("
response.body StringClass
", source.readUtf8(), "
");
                                        } catch (error) {
                                            try {
                                                console.log("
response.body ByteString
", source.readByteString().hex(), "
");
                                            } catch (error) {
                                                console.log("error 4:", error);
                                            }
                                        }
                                    }
                                }

                            }

                        }

                    } catch (error) {
                        console.log("error 3:", error);
                    }
                    return response;
                }
            }
        });
        var ArrayList = classLoader.use("java.util.ArrayList");
        var OkHttpClient = classLoader.use("okhttp3.OkHttpClient");
        console.log(OkHttpClient);
        OkHttpClient.$init.overload('okhttp3.OkHttpClient$Builder').implementation = function (Builder) {
            console.log("OkHttpClient.$init:", this, Java.cast(Builder.interceptors(), ArrayList));
            this.$init(Builder);
        };

        var MyInterceptorObj = MyInterceptor.$new();
        var Builder = classLoader.use("okhttp3.OkHttpClient$Builder");
        console.log(Builder);
        Builder.build.implementation = function () {
            this.interceptors().clear();
            //var MyInterceptorObj = MyInterceptor.$new();
            this.interceptors().add(MyInterceptorObj);
            var result = this.build();
            return result;
        };

        Builder.addInterceptor.implementation = function (interceptor) {
            this.interceptors().clear();
            //var MyInterceptorObj = MyInterceptor.$new();
            this.interceptors().add(MyInterceptorObj);
            return this;
            //return this.addInterceptor(interceptor);
        };

        console.log("hook_okhttp3...");
    });
}

Java.perform(function() {
    var application = Java.use("android.app.Application");
    application.attach.overload('android.content.Context').implementation = function(context) {
        var result = this.attach(context); // 先执行原来的attach方法
        var classloader = context.getClassLoader(); // 获取classloader
        Java.classFactory.loader = classloader;
        hook_okhttp3(Java.classFactory);
    }

});

二.最简单的直接hook请求的响应

代码：

import frida, sys

def on_message(message, data):
    if message['type'] == 'send':
        print("[*] {0}".format(message['payload']))
    else:
        print(message)



# hook请求和响应
jscode = """
Java.perform(function () {
    var OkHttpClient = Java.use("okhttp3.OkHttpClient");
    OkHttpClient.newCall.implementation = function (request) {
        var result = this.newCall(request);
        console.log(request.toString());
        return result;
        };
    
    var OkHttpRealCall = Java.use("okhttp3.RealCall");
    OkHttpRealCall.execute.implementation = function(){
            var result = this.execute();            
            console.log(result.toString());
            return result;
}    

});
"""


process = frida.get_usb_device().attach('com.smile.gifmaker')
script = process.create_script(jscode)
script.on('message', on_message)
print('[*] Running CTF')
script.load()
sys.stdin.read()