iOS逆向之深入解析如何使用Theos开发插件
【摘要】
一、Logos 语法
Logos 作为 Theos 开发组件的一部分,通过一组特殊的预处理指令,可以让编写函数钩子(hook)代码变得非常简单和清晰,Logos 是随着 Theos 发布的。%hook ...
一、Logos 语法
- Logos 作为 Theos 开发组件的一部分,通过一组特殊的预处理指令,可以让编写函数钩子(hook)代码变得非常简单和清晰,Logos 是随着 Theos 发布的。
- %hook 指定需要 hook 的类名,以 %end 结尾。
- %log 用来打印 log,将信息输入到 syslog 中,如 %log((NSString *)@“ZeluLi”)。
- %orig 执行被 hook 函数的原始代码,类似于 super.method 功能。
- %group 该指令用于 %hook 的分组,%group 后边跟的是组名,%group 也是必须以 %end 结尾,其中可以包含多个 %hook。
- %init 该指令用来初始化某个 %group,一个 group 只有被初始化后才可生效,init 必须在 hook 中进行执行。
- %ctor tweak 的构造器,用来初始化,如果不显式定义,Theos 就会自动生成一个%ctor,并在其中调用 %init(_ungrouped),如:%ctor { %init(_ungrouped)}。
- %new 该指令用来给现有的 class 添加一个新的函数,与 Runtime 中的 class_addMethod 相同。
- %c 该指令用来获取一个类的名称,相当于 objc_getClass。
二、工程目录下文件
- 新建工程的命令:$THEOS/bin/nic.pl:
devzkndeMacBook-Pro:~ devzkn$ $THEOS/bin/nic.pl
NIC 2.0 - New Instance Creator
------------------------------
[1.] iphone/activator_event
[2.] iphone/application_modern
[3.] iphone/cydget
[4.] iphone/flipswitch_switch
[5.] iphone/framework
[6.] iphone/ios7_notification_center_widget
[7.] iphone/library
[8.] iphone/notification_center_widget
[9.] iphone/preference_bundle_modern
[10.] iphone/tool
[11.] iphone/tweak
[12.] iphone/xpc_service
Choose a Template (required): 11
Project Name (required): testTweakDemo
Package Name [com.yourcompany.testtweakdemo]:
Author/Maintainer Name [devzkn]:
[iphone/tweak] MobileSubstrate Bundle filter [com.apple.springboard]: com.apple.UIKit
[iphone/tweak] List of applications to terminate upon installation (space-separated, '-' for none) [SpringBoard]:
Instantiating iphone/tweak in testtweakdemo/...
Done.
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- 说明:
-
- 参数 Package Name:deb包的名字;
-
- 参数 Bundle filter:tweak 的目标 app 的 bundle identifier,比如 wechat 的 bundle Id :com.tentcent.xin;
-
- iOS 系统的桌面应用的 bundle Id:com.apple.springboard tweak 注入到所有的 app,那么 Bundle filter 应该为 com.apple.UIKit。
- 新建一个工程之后,会生成四个文件:control、plist、Makefile、Tweak.xm,这几个文件分别有什么用?
$ ls -lrt
total 32
-rw-r--r-- 1 devzkn staff 51 Aug 10 17:07 testTweakDemo.plist
-rw-r--r-- 1 devzkn staff 223 Aug 10 17:07 control
-rw-r--r-- 1 devzkn staff 1045 Aug 10 17:07 Tweak.xm
-rw-r--r-- 1 devzkn staff 189 Aug 10 17:07 Makefile
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① control 文件
- control 文件存储项目有关的信息:名称、版本、开发者:
Package: com.yourcompany.testtweakdemo
Name: testTweakDemo
Depends: mobilesubstrate
Version: 0.0.1
Architecture: iphoneos-arm
Description: An awesome MobileSubstrate tweak!
Maintainer: devzkn
Author: devzkn
Section: Tweaks
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② plist文件
- plist 文件的作用:设置目标 app 的 bundle Id,如果 tweak 要注入多个 APP,就在 Bundles 数组中添加其 bundle Id:
devzkndeMacBook-Pro:testtweakdemo devzkn$ more testTweakDemo.plist
{ Filter = { Bundles = ( "com.apple.UIKit" ); }; }
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③ Makefile 文件
- Makefile 文件设置需要用到的文件、框架、库:
$ more Makefile
include $(THEOS)/makefiles/common.mk
TWEAK_NAME = testTweakDemo
testTweakDemo_FILES = Tweak.xm
include $(THEOS_MAKE_PATH)/tweak.mk
after-install::
install.exec "killall -9 SpringBoard"
devzkndeMacBook-Pro:testtweakdemo devzkn$
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- testTweakDemo_FILES 设置工程需要引用的文件,多个文件之间以空格分隔。格式:工程名FILES = 要编译的文件名:
testTweakDemo_FILES = Tweak.xm MyClass1.m MyClass2.m
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- include $(THEOS)/makefiles/common.mk,很多关键的变量都在 common.mk 中。
- 工程名字_FRAMEWORKS : 设置工程需要引用的第三方库,多个库之间以空格分隔:
工程名字_FRAMEWORKS : 设置工程需要引用的第三方库,多个库之间以空格分隔:
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- after-install:在 tweak 安装之后,执行的一些辅助任务,比如杀掉目标进程,好让 CydiaSubstrate 在进程重启的过程加载对应的 dylib。
④ Tweak.xm
- 用于编写注入的代码,其中的 %hook,%orig,%log 符合是 theos 对 cydia Substrate 提供的函数的宏封装:
IMP MSHookMessage(Class class, SEL selector, IMP replacement, const char* prefix); // prefix should be NULL.
void MSHookMessageEx(Class class, SEL selector, IMP replacement, IMP *result);
void MSHookFunction(void* function, void* replacement, void** p_original);
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- Tweak.xm 的文件名后缀 x 代表的含义:
-
- Tweak.xm 的文件名后缀 x 代表支持 Logos 语法, 如果只有一个 x 代表源文件支持 Logos 和 C 语法;如果是 xm,说明源文件支持 Logos 和 C/C++ 语法;
-
- 其中的 %hook,%orig,%log 等都是 Logos 语法支持的内容。
$ more Tweak.xm
/* How to Hook with Logos
Hooks are written with syntax similar to that of an Objective-C @implementation.
You don't need to #include <substrate.h>, it will be done automatically, as will
the generation of a class list and an automatic constructor.
%hook ClassName
// Hooking a class method
+ (id)sharedInstance {
return %orig;
}
// Hooking an instance method with an argument.
- (void)messageName:(int)argument {
%log; // Write a message about this call, including its class, name and arguments, to the system log.
%orig; // Call through to the original function with its original arguments.
%orig(nil); // Call through to the original function with a custom argument.
// If you use %orig(), you MUST supply all arguments (except for self and _cmd, the automatically generated ones.)
}
// Hooking an instance method with no arguments.
- (id)noArguments {
%log;
id awesome = %orig;
[awesome doSomethingElse];
return awesome;
}
// Always make sure you clean up after yourself; Not doing so could have grave consequences!
%end
*/
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⑤ 编译和安装deb
- 使用命令 make package 编译,其中 packages 文件夹下保留的是每一次编译成功产生的 deb 安装包文件。theos 编译之后,会生成一个 deb 包,deb 安装到手机上面,有多种方式:
-
- 通过 iFile 进行安装:使用 iTools 等工具将这个 deb 包拷贝到手机中,利用 iFile 浏览进行安装;
-
- 通过 SSH 进行安装:
-
-
- 需要使用到 openssh 服务,确保手机上已经安装了该服务(cydia 中搜索安装 OpenSSH),这种安装方式需要在 Makefile 文件的首行添加手机设备的 IP 地址 THEOS_DEVICE_IP = 10.200.201.22 (手机本地 IP);
-
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- 安装的时确保证 iOS 设备和 Mac 在同一局域网的同一网段中,打开终端,先 cd 到工程的目录下,然后输入编译安装命令 make package install;
-
-
- 通过 cydia 源进行安装。
⑥ 免输密码进行 SSH
- 使用 make package install 命令可以一次性完成编译、打包、安装,这个过程中可能需要两次输入 ssh 的 root 密码(一次是签名打包,一次是安装)。
- 创建 rsa文件 : ssh-keygen -t rsa -b 2048 按提示输入存放 keygen 存放的目录和文件名。
- 配置 ssh config:
# Private 192.168.2.125
Host iPhone
HostName 192.168.2.125
User root
IdentityFile ~/.ssh/id_rsa_Theos125
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- 添加对应的公钥到对应的远程服务器 :ssh-copy-i d千万不要把私钥泄漏,只是把公钥(*.pub 文件)复制给远程服务器,ssh-copy-id root@:
ssh-copy-id 指定认证文件$ ssh-copy-id -i id_rsa_Theos125 root@192.168.2.131
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$ ssh-copy-id root@192.168.2.212
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/Users/devzkn/.ssh/id_rsa_Theos.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.2.212's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'root@192.168.2.212'"
and check to make sure that only the key(s) you wanted were added.
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三、常见问题
① 压缩方式不被支持
- 原因是 dpkg 有两个不同的版本,最新版本不支持 lzma:
$ make package
> Making all for tweak testTweakDemo…
==> Preprocessing Tweak.xm…
==> Compiling Tweak.xm (armv7)…
==> Linking tweak testTweakDemo (armv7)…
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of iOS 7 [-Wdeprecated]
==> Preprocessing Tweak.xm…
==> Compiling Tweak.xm (arm64)…
==> Linking tweak testTweakDemo (arm64)…
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of iOS 7 [-Wdeprecated]
==> Merging tweak testTweakDemo…
==> Signing testTweakDemo…
> Making stage for tweak testTweakDemo…
dpkg-deb: error: obsolete compression type 'lzma'; use xz instead
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --help for help about installing and deinstalling packages.
make: *** [internal-package] Error 2
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- 解决方案:修改 lzma 为 xz:
$ find /opt/theos -type f -name "*.mk" | xargs grep "lzma"
/opt/theos/makefiles/package/deb.mk:_THEOS_PLATFORM_DPKG_DEB_COMPRESSION ?= lzma
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- 修改 /opt/theos/makefiles/package/deb.mk 第六行为_THEOS_PLATFORM_DPKG_DEB_COMPRESSION ?= xz。
- 另外一个办法是直接使用旧版本,命令如下:
Debian 'dpkg' package management program version 1.18.24 (darwin-amd64)
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brew switch dpkg 1.18.10
brew link dpkg
brew pin dpkg 1.18.10
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- 验证是否修复:
$ make package
> Making all for tweak testTweakDemo…
make[2]: Nothing to be done for `internal-library-compile'.
> Making stage for tweak testTweakDemo…
dpkg-deb: building package 'com.yourcompany.testtweakdemo' in './packages/com.yourcompany.testtweakdemo_0.0.1-2+debug_iphoneos-arm.deb'.
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- 另如果只修改为 XZ 的话,届时安装的时候仍会报错:
root@192.168.2.212's password:
Selecting previously unselected package com.yourcompany.testtweakdemo.
(Reading database ... 1848 files and directories currently installed.)
Preparing to unpack /tmp/_theos_install.deb ...
Unpacking com.yourcompany.testtweakdemo (0.0.1-8+debug) ...
dpkg-deb (subprocess): unable to execute decompressing archive member (xz): No such file or directory
dpkg-deb (subprocess): subprocess decompressing archive member returned error exit status 2
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing archive /tmp/_theos_install.deb (--install):
subprocess dpkg-deb --fsys-tarfile returned error exit status 2
Errors were encountered while processing:
/tmp/_theos_install.deb
make: *** [internal-install] Error 1
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- 如果在出现上面错误时是将 lzma->xz 的话,后面可能会出现此错误,解决方法是将 lzma->gzip 即可:
_THEOS_PLATFORM_DPKG_DEB_COMPRESSION ?=gzip
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- 验证是否成功:
$ make package install
> Making all for tweak testTweakDemo…
make[2]: Nothing to be done for `internal-library-compile'.
> Making stage for tweak testTweakDemo…
dpkg-deb: building package 'com.yourcompany.testtweakdemo' in './packages/com.yourcompany.testtweakdemo_0.0.1-9+debug_iphoneos-arm.deb'.
==> Installing…
root@192.168.2.212's password:
(Reading database ... 1848 files and directories currently installed.)
Preparing to unpack /tmp/_theos_install.deb ...
Unpacking com.yourcompany.testtweakdemo (0.0.1-9+debug) ...
Setting up com.yourcompany.testtweakdemo (0.0.1-9+debug) ...
install.exec "killall -9 SpringBoard"
root@192.168.2.212's password:
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② THEOS_DEVICE_IP 设置错误
$ make package install
> Making all for tweak testTweakDemo…
make[2]: Nothing to be done for `internal-library-compile'.
> Making stage for tweak testTweakDemo…
dpkg-deb: building package 'com.yourcompany.testtweakdemo' in './packages/com.yourcompany.testtweakdemo_0.0.1-3+debug_iphoneos-arm.deb'.
==> Error: /Applications/Xcode.app/Contents/Developer/usr/bin/make install requires that you set THEOS_DEVICE_IP in your environment.
==> Notice: It is also recommended that you have public-key authentication set up for root over SSH, or you will be entering your password a lot.
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- 解决:THEOS_DEVICE_IP = 10.200.201.22 (手机本地 IP),首先得保证 iOS 设备和 Mac 在同一局域网的同一网段中,打开终端,输入 ssh root@192.168.xxx.xxx 输入 iOS 设备密码,默认 alpine:
$ ping 192.168.2.212
PING 192.168.2.212 (192.168.2.212): 56 data bytes
64 bytes from 192.168.2.212: icmp_seq=0 ttl=64 time=34.303 ms
64 bytes from 192.168.2.212: icmp_seq=1 ttl=64 time=28.949 ms
64 bytes from 192.168.2.212: icmp_seq=2 ttl=64 time=25.753 ms
64 bytes from 192.168.2.212: icmp_seq=3 ttl=64 time=5.306 ms
64 bytes from 192.168.2.212: icmp_seq=4 ttl=64 time=106.028 ms
64 bytes from 192.168.2.212: icmp_seq=5 ttl=64 time=84.643 ms
64 bytes from 192.168.2.212: icmp_seq=6 ttl=64 time=44.845 ms
^C
--- 192.168.2.212 ping statistics ---
7 packets transmitted, 7 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 5.306/47.118/106.028/32.913 ms
devzkndeMacBook-Pro:testtweakdemo devzkn$ ssh root@192.168.2.212
The authenticity of host '192.168.2.212 (192.168.2.212)' can't be established.
RSA key fingerprint is SHA256:/.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.212' (RSA) to the list of known hosts.
root@192.168.2.212's password:
Permission denied, please try again.
root@192.168.2.212's password:
iPhone:~ root#
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文章来源: blog.csdn.net,作者:Serendipity·y,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/Forever_wj/article/details/120916276
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