My-CTF-Challenges - Challenges I created for CTF competitions.

项目说明

My CTF Challenges

This is some challenges I created for CTF competitions.

> The difficulty is rated by me, and it is only consistent within a single competition.
> While I tried to keep it consistent by it does not really work :disappointed:, so don't be surprised if you find a challenge with lower rating that is harder than a challenge with higher rating.

TSJ CTF 2022

> Also published here for better math rendering.

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------------------- | ---------------- | ----------------------------------------- | ---------- |
| Futago | Crypto, CSC [^1] | RSA | ★ |
| RNG++ | Crypto | LCG | ★★ |
| babyRSA | Crypto | RSA, ECC | ★★ |
| Top Secret | Crypto | GF, dlog | ★★☆ |
| Cipher Switching Service | Crypto | RSA, ElGamal | ★★☆ |
| Signature | Crypto | ECDSA, LLL, AES-CTR | ★★★ |
| RNG+++ | Crypto | LCG, LLL | ★★★☆ |
| Nim Notes | Web | Script Gadgets, CSRF, CRLF Injection, CSP | ★★★☆ |
| Genie [^2] | Web, Crypto | Path tra, AES-CBC, Deserialization | ★★★☆ |
| Just a pyjail | Misc | Pyjail | ★★★ |

[^1]: CSC refers to *Cursed Shaman Challenges*, just kind of a trolling/guessing category for this CTF.
[^2]: This challenge is made by both and me.

HITCON CTF 2022

| Name | Category | Tags | Difficulty |
| ---------------------------------------------- | ----------- | ------------------------------------ | ---------- |
| BabySSS | Crypto | SSS, CRT | ★☆ |
| Superprime | Crypto | Binary Search, Prune and Search | ★★☆ |
| Chimera | Crypto | ECM, LLL, ECDLP, HSSP | ★★★★ |
| LemMinX | Misc | LSP, XXE | ★★★ |
| Secure Paste | Web, Crypto | JSONP, Key Confusion, DOMPurify, CSP | ★★★★ |

HITCON CTF 2023

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------------------------- | -------- | --------------------------- | ---------- |
| Share | Crypto | SSS, CRT | ★★ |
| EZRSA | Crypto | ECC, Wiener, ECM | ★★☆ |
| Echo | Crypto | RSA, Index Calculus, LLL | ★★★ |
| Random Shuffling Algorithm | Crypto | Noisy CRT, Coppersmith | ★★★☆ |
| Collision | Crypto | Collision | ★★★☆ |
| Lisp.js | Misc | Node.js Jail | ★★★ |
| Login System | Web | TE.TE, JSON Injection, YAML | ★★★ |
| Canvas | Web | JS Jail, Worker, CSP | ★★★☆ |
| Harmony | Web | Electron | ★★★★☆ |

HITCON CTF 2024

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------- | -------- | ----------------------- | ---------- |
| ZKPoF | Crypto | Python, Coppersmith | ★★ |
| BrokenShare | Crypto | SSS, LLL | ★★★ |
| Hyper512 | Crypto | LFSR, FCA | ★★★☆ |
| ECLCG | Crypto | ECDSA, LCG, LLL | ★★★★ |
| MatProd | Crypto | Matrix, LLL | ★★★★ |
| Flag Reader | Misc | Tar | ★☆ |
| RClonE | Web | CSRF, RCE | ★★ |
| Truth of NPM | Web | Deno, LFI, RCE | ★★★ |
| Private Browsing+ | Web | XSS, Response Splitting | ★★★★ |

HITCON CTF 2025

| Name | Category | Tags | Difficulty |
| -------------------------------------- | -------- | ------------- | ---------- |
| wp-admin | Web | PHP, LFI, RCE | ★★★★ |
| Pedantic | Crypto | ZKP, LLL | ★★★ |
| BabyLWE | Crypto | LWE | ★★★☆ |
| MRSA | Crypto | RSA, LLL | ★★★☆ |
| Paranoid | Crypto | ZKP, k-list | ★★★★ |

ImaginaryCTF 2023

| Name | Category | Tags | Difficulty |
| ---------------------------------------------------------- | -------- | ------------------ | ---------- |
| Tan | Crypto | LLL | ★★ |
| Wasteful | Crypto | RSA, Coppersmith | ★★ |
| Sus | Crypto | RSA, Algebra | ★★☆ |
| Imaginary Casino | Crypto | CSIDH, RNG | ★★☆ |
| Login | Web | PHP | ★☆ |
| Sanitized | Web | DOMPurify, XHTML | ★★★ |
| Sanitized Revenge | Web | DOMPurify, XHTML | ★★★ |
| Typechecker | Reverse | TypeScript, Linear | ★★ |
| Get and set | Misc | Pyjail | ★★ |

ImaginaryCTF 2024

| Name | Category | Tags | Difficulty |
| -------------------------------------- | -------- | ------------------ | ---------- |
| lf3r | Crypto | LFSR | ★★☆ |
| coast | Crypto | Isogeny | ★★☆ |
| notitle | Crypto | Algebra, DLP, LLL | ★★★ |
| pacap | Crypto | Coppersmith | ★★★ |
| | Reverse | Marko | ★★★ |
| readme | Web | Path Normalization | ★ |
| readme2 | Web | Bun, HTTP | ★★ |
| calc | Misc | Pyjail | ★★★ |

ASIS CTF Finals 2024

| Name | Category | Tags | Difficulty |
| --------------------------------------- | -------- | ---- | ---------- |
| LiveMD | Web | XSS | ★★★☆ |

AlpacaHack Round 9

| Name | Category | Tags | Difficulty |
| ----------------------------------- | -------- | ---------- | ---------- |
| ffmac | Crypto | Linear, GB | ★★★ |

ImaginaryCTF

| Name | Category | Tags | Difficulty |
| ----------------------------------------------------------------- | -------- | ------------------------------------------ | ---------- |
| Really Simple Algorithm | Crypto | RSA, Continued Fractions | ★★ |
| Minimal | Pwn | Stack pi, read(2) return value, SROP | ★★ |

These two challenges are created before I became a board of ImaginaryCTF.

Round 26

| Name | Category | Tags | Difficulty |
| --------------------------------------------------------------- | -------- | --------------------- | ---------- |
| Box | Crypto | Affine function | ☆ |
| pqqp | Crypto | RSA, Number Theory | ★ |
| First RSA | Crypto | RSA | ★☆ |
| No modulus | Crypto | RSA, LLL | ★★★ |
| Login Please | Web | Ja, Prototype | ★ |
| Read | Pwn | Shellcoding | ★☆ |
| Not a kernel pwn | Misc | Pri Escalation | ★☆ |
| Free Shell | Misc | Bash | ★★ |
| Here's some Rev v2 | Reverse | Pyc | ☆ |
| Here's some Rev v3 | Reverse | LCG | ★ |

Round 27

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------- | -------- | -------------------------- | ---------- |
| RSA-CBC | Crypto | RSA | ☆ |
| RSA-CBC v2 | Crypto | RSA, Coppersmith | ★☆ |
| Mobius | Crypto | Rational Function, LLL | ★★☆ |
| Hello World as a Service | Misc | Ja | ★☆ |
| Baby Shell | Pwn | C++, std::string_view, UAF | ★ |

Round 28

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------ | -------- | ------------ | ---------- |
| Substitution | Crypto | RSA, Search | ★☆ |
| Unchanged | Reverse | pthread, LCG | ★☆ |
| Filter Master | Web | PHP, filter | ★★ |
| Half FFT | Misc | FFT, LLL | ★★☆ |

Round 29

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------------------- | -------- | --------------------------- | ---------- |
| Strong Prime | Crypto | DLP, CRT | ★☆ |
| Web3 | Crypto | Ethereum, ECDLP | ★★ |
| Req Bin | Web | Python Format String, Flask | ★☆ |
| Generic Flag Checker | Reverse | Signal Handler | ★☆ |
| xkcd 835 | Pwn | UAF | ★★ |

Round 30

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------ | -------- | ----------------- | ---------- |
| PowerRSA | Crypto | RSA | ★ |
| Easy DSA: LCG | Crypto | ECDSA, LCG, LLL | ★★☆ |
| Fake Flags | Web | Trolling | ☆ |
| Echo | Web | Request Smuggling | ★☆ |

Round 31

| Name | Category | Tags | Difficulty |
| ------------------------------------ | -------- | ---------- | ---------- |
| KVIN | Web/Misc | Ja | ★★ |

Round 32

| Name | Category | Tags | Difficulty |
| ------------------------------------------------ | -------- | --------- | ---------- |
| Poly RSA | Crypto | RSA, GCD | ★★ |
| Old School | Web | Bash, CGI | ★☆ |

Round 33

| Name | Category | Tags | Difficulty |
| -------------------------------------- | -------- | ---------- | ---------- |
| Vault | Web | XSS, Cache | ★★☆ |

Round 34

| Name | Category | Tags | Difficulty |
| ---------------------------------------------- | -------- | -------------------- | ---------- |
| Integrity | Crypto | CRT-RSA, Coppersmith | ★☆ |

Round 35

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------------------------------- | -------- | ---- | ---------- |
| Encrypted Command Executor | Crypto | ECB | ★ |

Round 37

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------------------- | ------------ | ---- | ---------- |
| You can't reverse me | Misc/Reverse | Hook | ★☆ |

Round 39

| Name | Category | Tags | Difficulty |
| -------------------------------------------------- | -------- | ------ | ---------- |
| Safe Pickle | Misc | Pickle | ★☆ |

Round 40

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------ | -------- | ------------- | ---------- |
| Leet Universe | Crypto | Number Theory | ★★ |

Round 43

| Name | Category | Tags | Difficulty |
| ---------------------------------------------------- | -------- | ------------- | ---------- |
| Three Pieces | Crypto | Number Theory | ★☆ |

Round 44

| Name | Category | Tags | Difficulty |
| -------------------------------------------------- | -------- | ----------- | ---------- |
| Flag Server | Web | HTTP Cookie | ★★☆ |
| FLT-1337 | Misc | Sage Trivia | ☆ |

Round 48

| Name | Category | Tags | Difficulty |
| ------------------------------------------ | -------- | --------- | ---------- |
| readme3 | Web | HTTP, Bun | ★★ |

Round 49

| Name | Category | Tags | Difficulty |
| ------------------------------------------ | -------- | ----------- | ---------- |
| MDLP | Crypto | DLP, LLL | ★★ |
| MDLP v2 | Crypto | Coppersmith | ★★☆ |

Round 54

| Name | Category | Tags | Difficulty |
| -------------------------------------- | -------- | ------------------- | ---------- |
| MLFSR | Crypto | Stern's Attack, LLL | ★★★ |

Round 55

| Name | Category | Tags | Difficulty |
| ---------------------------------------------- | -------- | ------------------- | ---------- |
| MagicHash | Crypto | CRC, MD5, Collision | ★★ |

AIS3 Pre-exam 2022

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------------------- | -------- | ------------------------------------- | ---------- |
| JeetQode | Misc | PPC, JQ | ★☆ |
| B64DLE | Misc | AES-CTR, Pickle, Python Format String | ★★☆ |
| SC | Crypto | Classic | ☆ |
| Fast Cipher | Crypto | Modular Arithmetic | ☆ |
| shamiko | Crypto | SHA1, DSA | ★☆ |
| Really Strange orAcle | Crypto | GCD, Binomial Theorem | ★☆ |
| pettan | Crypto | RSA, MT19937 | ★★☆ |
| pekobot | Crypto | Invalid Cur | ★★★ |
| Flag Checker | Reverse | ROP, Pickle, RSA-like | ★★ |
| Private Browsing | Web | SSRF, Redis, PHP, Deserialization | ★★ |
| UTF-8 Editor | Pwn | C++, std::, OOB, GOT o | ★★ |
| SAAS | Pwn | C++, Copy Constructor, UAF | ★★☆ |

AIS3 Pre-exam 2023

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------------- | -------- | ------------------- | ---------- |
| ECC | Crypto | ECC | ★ |
| Not Wiener | Crypto | RSA, Coppersmith | ★★ |
| Media Server | Misc | Python http, procfs | ★★ |
| Gitly | Web | 0day | ★ |
| Password Generator | Pwn | Number Theory, ROP | ★☆ |

AIS3 EOF 2023 - koh-jeopardy

| Name | Category | Tags | Difficulty |
| ----------------------------------------------------------------------- | -------- | ---------------- | ---------- |
| Shamiko no fukushuu | Crypto | ECDSA, HMAC | ★ |
| onelinecrypto | Crypto | RSA, LSB | ★ |
| NotLFSR | Crypto | LFSR | ★☆ |
| magicRSA | Crypto | RSA | ★☆ |
| Neo RSA | Crypto | RSA, coppersmith | ★★ |

AIS3 EOF 2024

| Name | Category | Tags | Difficulty |
| -------------------------------------------------------------------- | -------- | --------------------- | ---------- |
| Baby Side Channel Attack | Crypto | SCA, RSA | ★ |
| Baby ECDLP | Crypto | Linear, ECDLP | ★☆ |
| Baby XOR | Crypto | Linear, LLL | ★★★ |
| Internal | Web | Nginx, CRLF Injection | ★ |

AIS3 EOF 2025

| Name | Category | Tags | Difficulty |
| ------------------------------ | -------- | ------------- | ---------- |
| prsa | Crypto | RSA, Paillier | ★★ |
| zkdlp | Crypto | ZKP, MT19937 | ★★☆ |

AIS3 EOF 2026

| Name | Category | Tags | Difficulty |
| ---------------------------------------------------- | -------- | ---------- | ---------- |
| Still Not Random | Crypto | LLL, ECDSA | ★★ |
| 65537 | Crypto | LLL, RSA | ★★☆ |
| LOL | Crypto | LFSR, GF | ★★☆ |

Security BSides Ahmedabad CTF 2022

| Name | Category | Tags | Difficulty |
| ------------------------------------------------------------------------- | -------- | ---- | ---------- |
| A complex number | Crypto | LLL | ★★★ |

项目信息

开发语言：Python

Star 数：255

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Challenges I created for CTF competitions.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。