iOS逆向课程笔记（八）

• 获取iOS iPhone 上微信bundle的路径 ps -e | grep WeChat

  
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• iPhone 微信程序拷贝到 Mac scp /var/mobile/Containers/Bundle/Application/BA5B36D0-E801-4B5A-80EB-9306A8438D0A/WeChat.app/WeChat liudefu@10.0.105.143:/tmp

  
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• otool -L WeChat 查看微信用的框架依赖库

  
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• 是否加壳 otool -l WeChat | grep crypt

  
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  • crypt 表示0或者没有crypt字段表示没有加密，crypt为1表示加密了，为什么crypt有2个呢，因为微信是个集合包，包含了arm64，和arm7,所以微信是加壳的，加壳是用class-dump拿 不出来
  • cycript -p WeChat

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• class-dump WeChat 砸壳

  
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  如果没有加密的应用用class-dump 砸壳，可以看到一切文件

• class-dump 如何使用

class-dump 3.5 (64 bit)
Usage: class-dump [options] <mach-o-file>

 where options are:
       -a             show instance variable offsets
       -A             show implementation addresses
       --arch <arch>  choose a specific architecture from a universal binary (ppc, ppc64, i386, x86_64, armv6, armv7, armv7s, arm64)
       -C <regex>     only display classes matching regular expression
       -f <str>       find string in method name
       -H             generate header files in current directory, or directory specified with -o
       -I             sort classes, categories, and protocols by inheritance (overrides -s)
       -o <dir>       output directory used for -H
       -r             recursively expand frameworks and fixed VM shared libraries
       -s             sort classes and categories by name
       -S             sort methods by name
       -t             suppress header in output, for testing
       --list-arches  list the arches in the file, then exit
       --sdk-ios      specify iOS SDK version (will look in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS<version>.sdk
       --sdk-mac      specify Mac OS X version (will look in /Developer/SDKs/MacOSX<version>.sdk
       --sdk-root     specify the full SDK root path (or use --sdk-ios/--sdk-mac for a shortcut)

 搜索微信的头文件
 class-dump -s -S -H weChat 
 搜索SpringBoard头文件
 class-dump -s -S -H SpringBoard -o ./SBHeaders

• 查看头文件的个数
  • ls -lR|grep "^-"|wc -l

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