ReferenceMonitor-Repy - Implemented a Defensive Security System and attack

项目说明

ReferenceMonitor-Repy

1. Created a reference monitor that will, when asked to do so, protect files starting with private_ (and only those files). If the contents of a file begin with the characters “INV”, then a listfiles() call must not show that the file exists. If the contents of a file begin with the characters “PER” then a remo() call must raise a RepyArgumentError. In cases not specified above, all calls work identically to the RepyV2 API.

Three design paradigms are at work in this assignment: accuracy, efficiency, and security.

Accuracy: The reference monitor you create should only stop the specified actions from being executed. All other actions should be allowed. For example, if a user tries to open or remove an in file, this should be allowed. If a user tries to delete a file “foo” that starts with the characters “PER” this is also allowed (since the file name does not start with private_).
Efficiency: The reference monitor should use a minimum number of resources, so it does not slow down the system. This means you must not re-read the header of each private_ file every time there is a listfiles() or remo() call. You will need to track the state of the files as the system operates, including the data that is written to files.
Security: The attacker should not be able to circumvent the reference monitor and cause files that should not be displayed to be displayed or files that should not be removed to be removed.

2. Created attack programs that test the following design paradigms at work in reference monitor:

Accuracy: The reference monitor you create should only stop the specified actions from being executed. All other actions should be allowed. For example, if a user tries to open or remove an in file, this should be allowed. If a user tries to delete a file “foo” that starts with the characters “PER” this is also allowed (since the file name does not start with private_).
Security: You should not be able to circumvent the reference monitor and cause files that should not be displayed to be displayed or files that should not be removed to be removed.

How to run your tests on many reference monitors:

If you are using Mac or Linux, you can do something like the following:

Put all security layer and attack cases in the same directory you were using before to run single security layer and attack program.

Then you can type the following in the bash shell to execute the testcases with the reference monitors:

for referencemonitor in reference_; do for testcase in netid_.r2py; do python repy.py restrictions.default encasementlib.r2py $referencemonitor $testcase; done; done

All the instructions are mentioned here

项目信息

开发语言：未知

Star 数：3

技术要点

该项目属于防护思路方向的开源资源，代码结构清晰，适合安全研究人员学习参考。项目围绕Implemented a Defensive Security System and attack programs in Repy V2展开，提供了可运行的实现，对理解相关安全机制、工具原理与攻防技术具有较高的研究价值。

从技术实现角度看，此类项目的核心在于对底层原理的深入理解与工程化落地。开发者在研究过程中可以结合官方文档与社区讨论，梳理项目的初始化流程、核心模块职责与数据流转，逐步掌握其中的技术细节与设计思路。

使用与学习建议

1. 下载源码压缩包，解压到本地环境。

2. 根据项目类型准备对应的运行环境与依赖。

3. 按照 README 中的步骤完成配置与部署。

4. 在隔离的测试环境中运行验证，避免影响生产系统。

免责声明

本资源来源于开源社区，仅供安全研究、技术学习与合法授权范围内的攻防演练使用，请勿用于任何非法或侵害他人权益的用途。使用本项目产生的一切后果由使用者自行承担。