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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # 使用方法 2 | frida-dump-il2cpp-class.js中需要修改il2cpp_api，InitLocked_pianyi，package_name这3个变量的值 3 | il2cpp_api可通过 [frida-find-il2cpp-api](https://github.com/AndroidReverser-Test/frida-find-il2cpp-api)这个项目中的find-il2cpp-api2.js的注入来获取 4 | 5 | InitLocked_pianyi则需要使用ida解析libil2cpp.so后，通过搜索字符串"' because generic types cannot have explicit layout."再查找其交叉引用定位到需要的函数附近 6 | ![class_dump_function](class_dump.JPG) 7 | 上图标黄处的函数地址即为需要的偏移 8 | 9 | package_name即为包名 10 | 11 | 在正确修改上述偏移后即可通过frida spawn启动目标app注入脚本，待需要的class完全加载后，再主动调用get_class_info若无错误发生将会在/data/data/包名/files/下生成 12 | class_info.log. -------------------------------------------------------------------------------- /class_dump.JPG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidReverser-Test/il2cpp_class_dumper/f41c85a11fbd33bbeaeefb8bb43c6d2d5f2d1f4d/class_dump.JPG -------------------------------------------------------------------------------- /frida-dump-il2cpp-class.js: -------------------------------------------------------------------------------- 1 | function hook_call_constructors() { 2 | let get_soname = null; 3 | let call_constructors_addr = null; 4 | let hook_call_constructors_addr = true; 5 | let soflags = []; 6 | 7 | let linker = null; 8 | if (Process.pointerSize == 4) { 9 | linker = Process.findModuleByName("linker"); 10 | } else { 11 | linker = Process.findModuleByName("linker64"); 12 | } 13 | 14 | let symbols = linker.enumerateSymbols(); 15 | for (let index = 0; index < symbols.length; index++) { 16 | let symbol = symbols[index]; 17 | if (symbol.name == "__dl__ZN6soinfo17call_constructorsEv") { 18 | call_constructors_addr = symbol.address; 19 | } else if (symbol.name == "__dl__ZNK6soinfo10get_sonameEv") { 20 | get_soname = new NativeFunction(symbol.address, "pointer", ["pointer"]); 21 | } 22 | } 23 | if (hook_call_constructors_addr && call_constructors_addr && get_soname) { 24 | Interceptor.attach(call_constructors_addr,{ 25 | onEnter: function(args){ 26 | let soinfo = args[0]; 27 | let soname = get_soname(soinfo).readCString(); 28 | if(soname!=null && !soflags.includes(soname)){ 29 | // console.log(soname); 30 | if(soname.indexOf("libil2cpp.so")!=-1){ 31 | dump_class(); 32 | } 33 | soflags.push(soname); 34 | } 35 | }, 36 | onLeave:function(ret){ 37 | } 38 | }); 39 | } 40 | } 41 | 42 | 43 | 44 | 45 | function dump_class(){ 46 | let il2cpp_base = Process.findModuleByName("libil2cpp.so").base; 47 | let InitLocked_addr = il2cpp_base.add(InitLocked_pianyi); 48 | let kclazz = NULL; 49 | 50 | Interceptor.attach(InitLocked_addr,{ 51 | onEnter:function(args){ 52 | kclazz = args[0]; 53 | kclazzs.push(kclazz); 54 | } 55 | }) 56 | } 57 | 58 | function get_class_info(){ 59 | Interceptor.detachAll(); 60 | let il2cpp_base = Process.findModuleByName("libil2cpp.so").base; 61 | let kclazz,kclazz_name,namespace,method,method_name,method_pointer,param_count,param,param_type,p_name,mstr,pclazz; 62 | const il2cpp_class_get_namespace = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_class_get_namespace"]),"pointer",["pointer"]); 63 | const il2cpp_class_get_name = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_class_get_name"]),"pointer",["pointer"]); 64 | const il2cpp_method_get_name = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_method_get_name"]),"pointer",["pointer"]); 65 | const il2cpp_class_get_methods = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_class_get_methods"]),"pointer",["pointer","pointer"]); 66 | const il2cpp_method_get_param_count = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_method_get_param_count"]),"int32",["pointer"]); 67 | const il2cpp_method_get_param = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_method_get_param"]),"pointer",["pointer","int32"]); 68 | const il2cpp_class_from_type = new NativeFunction(il2cpp_base.add(il2cpp_api["il2cpp_class_from_type"]),"pointer",["pointer"]); 69 | const path = "/data/data/"+package_name + "/files/class_info.log"; 70 | const file = new File(path,"w"); 71 | 72 | console.log(kclazzs.length,"class dumping"); 73 | for(let i=0;i