sekaictf-2022 - 🎵 Official source code and writeups for SekaiCTF 2

项目说明

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![Banner][Banner]

![Code License: AGPL v3][Code License]
![Non-Code License: CC BY-NC-SA 4.0][Non-Code License]
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This repository contains official source code and writeups for the majority of challenges in SekaiCTF 2022.

[CTFTime Event][CTFTime Event] •
[Website][Website] •
[Discord][Discord] •
[Blog][Blog] •
[Twitter][Twitter]

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Cryptography

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| Name | Author | Difficulty | Solves |
| ---------------------------------------------------------- | ---------------- | ---------- | ------ |
| Time Capsule | sahuang | Easy (1) | 178 |
| FaILProof | deuterium | Normal (2) | 62 |
| Secure Image Encryption | Yanhu1 & sahuang | Normal (2) | 49 |
| Diffecient | deuterium | Hard (3) | 7 |
| EZMaze | Utaha | Hard (3) | 11 |
| Robust CBC | sahuang & Yanhu1 | Expert (4) | 10 |
| FaILProof Revenge | deuterium | Expert (4) | 16 |

Forensics

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| Name | Author | Difficulty | Solves |
| ----------------------------------------------- | ------------ | ---------- | ------ |
| Blind Infection 1 | Battlemonger | Normal (2) | 23 |
| Broken Con | pamLELcu | Normal (2) | 94 |
| Blind Infection 2 | Battlemonger | Hard (3) | 15 |
| flag Mono | pamLELcu | Hard (3) | 47 |
| Symbolic Needs 1 | Battlemonger | Hard (3) | 24 |
| Symbolic Needs 2 | Battlemonger | Expert (4) | 18 |

Miscellaneous

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| Name | Author | Difficulty | Solves |
| ------------------------------------------ | --------- | ---------- | ------ |
| Console Port | pamLELcu | Easy (1) | 291 |
| Sus | pamLELcu | Easy (1) | 95 |
| Heardle | pamLELcu | Normal (2) | 54 |
| Matryoshka | pamLELcu | Expert (4) | 14 |
| Random Song | Yanhu1 | Hard (3) | 13 |
| Borpa | ElleuchX1 | Master (5) | 4 |

PPC

<img src=" width=250 align="right">

| Name | Author | Difficulty | Solves |
| ----------------------------------------------- | --------- | ---------- | ------ |
| Let's Play Osu!Mania | sahuang | Easy (1) | 273 |
| Electric Box | sahuang | Hard (3) | 36 |
| Pafs | Radewoosh | Hard (3) | 16 |
| Mind Calculator | pamLELcu | Expert (4) | 16 |
| Console Port Pro | pamLELcu | Master (5) | 7 |

Binary Exploitation

<img src=" width=250 align="right">

| Name | Author | Difficulty | Solves |
| ------------------------------------------- | ------------ | ---------- | ------ |
| Save Me | Jonathan | Normal (2) | 44 |
| Hello World Setup | Jonathan | Hard (3) | 7 |
| BFS | Zafirr | Expert (4) | 2 |
| gets | 4n0nym4u5 | Master (5) | 2 |
| GFT | Triacontakai | Master (5) | 2 |

Reverse Engineering

<img src=" width=250 align="right">

| Name | Author | Difficulty | Solves |
| ------------------------------------------------------ | ------------------ | ---------- | ------ |
| Perfect Match X-treme | sahuang & enscribe | Easy (1) | 111 |
| Matrix Lab 1 | sahuang | Easy (1) | 191 |
| Matrix Lab 2 | sahuang | Normal (2) | 80 |
| Matrix Lab 3 | sahuang | Hard (3) | 19 |
| Baby Chicken | sahuang | Expert (4) | 6 |
| Berserk | joezid | Master (5) | 2 |

Web

<img src=" width=250 align="right">

| Name | Author | Difficulty | Solves |
| ----------------------------------------- | -------- | ---------- | ------ |
| Bottled Poem | bwjy | Easy (1) | 146 |
| Sekai Game Start | bwjy | Normal (2) | 63 |
| Issues | Rik | Hard (3) | 49 |
| Crab Commodities | Strellic | Hard (3) | 30 |
| Safelist | Strellic | Expert (4) | 3 |
| Obligatory Calc | Strellic | Master (5) | 1 |

License

Any program and/or source code in this repository is licensed under the [GNU Affero General Public License 3][agpl]:

> SEKAI CTF 2022 Challenges and Solutions
> Copyright (C) 2022 Project SEKAI CTF team and contributors
>
> This program is free software: you can redistribute it and/or modify
> it under the terms of the GNU Affero General Public License as published
> by the Free Software Foundation, either 3 of the License, or
> (at your option) any later .
>
> This program is distributed in the hope that it will be useful,
> but WITHOUT ANY WARRANTY; without even the implied warranty of
> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> GNU Affero General Public License for more details.
>
> You should ha a copy of the GNU Affero General Public License
> along with this program. If not, see <

Any non-code/program content (writeups, READMEs, descriptions) in this repository is licensed under a Creati Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0):

> SEKAI CTF 2022 Challenges and Solutions by Project SEKAI CTF team and contributors is licensed under a [Creati Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].

[Banner]:
[Stars]:
[CTFTime Event]:
[Website]:
[Blog]:
[Twitter]:
[Cryptography]:
[Forensics]:
[Miscellaneous]:
[PPC]:
[Binary Exploitation]:
[Reverse Engineering]:
[Web]:
[agpl]:
[cc-by-nc-sa]:
[Non-Code License]:
[Code License]:
[Discord]:

项目信息

开发语言：C

Star 数：201

技术要点

该项目属于CTF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🎵 Official source code and writeups for SekaiCTF 2022!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。