class-dump逆向分析app

本文转载来源：http://blog.csdn.net/yiyaaixuexi/article/details/18353423

为了了解支付宝app的源码结构，我们可以使用class-dump-z工具来分析支付宝二进制。

1.下载配置class_dump_z

前往 https://code.google.com/p/networkpx/wiki/class_dump_z ，下载tar包，然后解压配置到本地环境

1. $ tar -zxvf class-dump-z_0.2a.tar.gz  
2. $ sudo cp mac_x86/class-dump-z /usr/bin/  

2.class_dump支付宝app

1. $ class-dump-z Portal > Portal-dump.txt  
2.   
3. @protocol XXEncryptedProtocol_10764b0  
4. -(?)XXEncryptedMethod_d109df;  
5. -(?)XXEncryptedMethod_d109d3;  
6. -(?)XXEncryptedMethod_d109c7;  
7. -(?)XXEncryptedMethod_d109bf;  
8. -(?)XXEncryptedMethod_d109b8;  
9. -(?)XXEncryptedMethod_d109a4;  
10. -(?)XXEncryptedMethod_d10990;  
11. -(?)XXEncryptedMethod_d1097f;  
12. -(?)XXEncryptedMethod_d10970;  
13. -(?)XXEncryptedMethod_d10968;  
14. -(?)XXEncryptedMethod_d10941;  
15. -(?)XXEncryptedMethod_d10925;  
16. -(?)XXEncryptedMethod_d10914;  
17. -(?)XXEncryptedMethod_d1090f;  
18. -(?)XXEncryptedMethod_d1090a;  
19. -(?)XXEncryptedMethod_d10904;  
20. -(?)XXEncryptedMethod_d108f9;  
21. -(?)XXEncryptedMethod_d108f4;  
22. -(?)XXEncryptedMethod_d108eb;  
23. @optional  
24. -(?)XXEncryptedMethod_d109eb;  
25. @end  

查看得到的信息是加过密的，这个加密操作是苹果在部署到app store时做的，所以我们还需要做一步解密操作。

3.使用Clutch解密支付宝app

1）下载Clutch
iOS7越狱后的Cydia源里已经下载不到Clutch了，但是我们可以从网上下载好推进iPhone
地址：Clutch传送门


2）查看可解密的应用列表

1. root# ./Clutch   
2.   
3. Clutch-1.3.2  
4. usage: ./Clutch [flags] [application name] [...]  
5. Applications available: 9P_RetinaWallpapers breadtrip Chiizu CodecademyiPhone FisheyeFree food GirlsCamera IMDb InstaDaily InstaTextFree iOne ItsMe3 linecamera Moldiv MPCamera MYXJ NewsBoard Photo Blur Photo Editor PhotoWonder POCO相机 Portal QQPicShow smashbandits Spark tripcamera Tuding_vITC_01 wantu WaterMarkCamera WeiBo Weibo    

3）解密支付宝app

1. root# ./Clutch Portal  
2.   
3. Clutch-1.3.2  
4. Cracking Portal...  
5. Creating working directory...  
6. Performing initial analysis...  
7. Performing cracking preflight...  
8. dumping binary: analyzing load commands  
9. dumping binary: obtaining ptrace handle  
10. dumping binary: forking to begin tracing  
11. dumping binary: successfully forked  
12. dumping binary: obtaining mach port  
13. dumping binary: preparing code resign  
14. dumping binary: preparing to dump  
15. dumping binary: ASLR enabled, identifying dump location dynamically  
16. dumping binary: performing dump  
17. dumping binary: patched cryptid  
18. dumping binary: writing new checksum  
19. Censoring iTunesMetadata.plist...  
20. Packaging IPA file...  
21.   
22. compression level: 0  
23.     /var/root/Documents/Cracked/支付宝钱包-v8.0.0-(Clutch-1.3.2).ipa  
24.   
25. elapsed time: 7473ms  
26.   
27. Applications Cracked:   
28. Portal  
29.   
30. Applications that Failed:  
31.   
32. Total Success: 1 Total Failed: 0  

4）导出已解密的支付宝app

从上一步骤得知，已解密的ipa位置为：/var/root/Documents/Cracked/支付宝钱包-v8.0.0-(Clutch-1.3.2).ipa

将其拷贝到本地去分析

4.class_dump已解密的支付宝app

解压.ipa后，到 支付宝钱包-v8.0.0-(Clutch-1.3.2)/Payload/Portal.app 目录下，class_dump已解密的二进制文件

1. $ class-dump-z Portal > ~/Portal-classdump.txt  

这回就可以得到对应的信息了：

1. @protocol ALPNumPwdInputViewDelegate <NSObject>  
2. -(void)onPasswordDidChange:(id)onPassword;  
3. @end  
4.   
5. @protocol ALPContactBaseTableViewCellDelegate <NSObject>  
6. -(void)shareClicked:(id)clicked sender:(id)sender;  
7. @end  
8.   
9. @interface MMPPayWayViewController : XXUnknownSuperclass <SubChannelSelectDelegate, UITableViewDataSource, UITableViewDelegate, CellDelegate, UIAlertViewDelegate> {  
10. @private  
11.     Item* channelSelected;  
12.     BOOL _bCheck;  
13.     BOOL _bOpenMiniPay;  
14.     BOOL _bNeedPwd;  
15.     BOOL _bSimplePwd;  
16.     BOOL _bAutopayon;  
17.     BOOL _bHasSub;  
18.     BOOL _bFirstChannel;  
19.     BOOL _bChangeSub;  
20.     BOOL _bClickBack;  
21.     UITableView* _channelListTableView;  
22.     NSMutableArray* _channelListArray;  
23.     NSMutableArray* _subChanneSelectedlList;  
24.     NSMutableArray* _unCheckArray;  
25.     UIButton* _saveButton;  
26.     UILabel* _tipLabel;  
27.     MMPPasswordSwichView* _payWaySwitch;  
28.     MMPPopupAlertView* _alertView;  
29.     UIView* _setView;  
30.     int _originalSelectedRow;  
31.     int _currentSelectedRow;  
32.     NSString* _statusCode;  
33.     ChannelListModel* _defaultChannelList;  
34. }  
35. @property(assign, nonatomic) BOOL bClickBack;  
36. @property(retain, nonatomic) ChannelListModel* defaultChannelList;  
37. @property(retain, nonatomic) NSString* statusCode;  
38. @property(assign, nonatomic) int currentSelectedRow;  
39. @property(assign, nonatomic) int originalSelectedRow;  
40. @property(retain, nonatomic) UIView* setView;  
41. @property(retain, nonatomic) MMPPopupAlertView* alertView;  
42. @property(retain, nonatomic) MMPPasswordSwichView* payWaySwitch;  
43. @property(assign, nonatomic, getter=isSubChannelChanged) BOOL bChangeSub;  
44. @property(assign, nonatomic) BOOL bFirstChannel;  
45. @property(assign, nonatomic) BOOL bHasSub;  
46. @property(assign, nonatomic) BOOL bAutopayon;  
47. @property(assign, nonatomic) BOOL bSimplePwd;  
48. @property(assign, nonatomic) BOOL bNeedPwd;  
49. @property(assign, nonatomic) BOOL bOpenMiniPay;  
50. @property(assign, nonatomic) BOOL bCheck;  
51. @property(retain, nonatomic) UILabel* tipLabel;  
52. @property(retain, nonatomic) UIButton* saveButton;  
53. @property(retain, nonatomic) NSMutableArray* unCheckArray;  
54. @property(retain, nonatomic) NSMutableArray* subChanneSelectedlList;  
55. @property(retain, nonatomic) NSMutableArray* channelListArray;  
56. @property(retain, nonatomic) UITableView* channelListTableView;  
57. -(void).cxx_destruct;  
58. -(void)subChannelDidSelected:(id)subChannel;  
59. -(void)switchCheckButtonClicked:(id)clicked;  
60. -(void)checkboxButtonClicked:(id)clicked;  
61. -(void)onCellClick:(id)click;  
62. -(void)showSubChannels;  
63. -(void)tableView:(id)view didSelectRowAtIndexPath:(id)indexPath;  
64. -(id)tableView:(id)view cellForRowAtIndexPath:(id)indexPath;  
65. -(int)tableView:(id)view numberOfRowsInSection:(int)section;  
66. -(float)tableView:(id)view heightForRowAtIndexPath:(id)indexPath;  
67. -(int)numberOfSectionsInTableView:(id)tableView;  
68. -(void)setTableViewFootView:(id)view;  
69. -(void)setTableViewHeaderView:(id)view;  
70. -(id)tableView:(id)view viewForHeaderInSection:(int)section;  
71. -(id)tableView:(id)view viewForFooterInSection:(int)section;  
72. -(float)tableView:(id)view heightForHeaderInSection:(int)section;  
73. -(float)tableView:(id)view heightForFooterInSection:(int)section;  
74. -(void)alertView:(id)view clickedButtonAtIndex:(int)index;  
75. -(void)clickSave;  
76. -(void)netWorkRequestWithPwd:(id)pwd;  
77. -(void)setPayWaySwitchStates:(id)states;  
78. -(void)changePayWaySwitch:(id)aSwitch;  
79. -(void)scrollToSelectedRow;  
80. -(void)didReceiveMemoryWarning;  
81. -(void)viewDidLoad;  
82. -(void)applicationEnterBackground:(id)background;  
83. -(void)dealloc;  
84. -(void)goBack;  
85. -(BOOL)isChannelsSetChanged;  
86. -(id)subChannelCode:(int)code;  
87. -(id)subChannelDesc:(int)desc;  
88. -(id)initWithDefaultData:(id)defaultData;  
89. -(id)initWithNibName:(id)nibName bundle:(id)bundle;  
90. -(void)commonInit:(id)init;  
91. @end  

5.分析支付宝源码片段

1）使用了@private关键字限制成员访问权限
但是实际上，在Objective-C编程中，使用@private连Keypath访问都拦不住的


2）抛出了冗长的成员对象
这非常有利分析程序结构