Ctf Crypto
DevOps & Securityctf-cryptoCtf Crypto is an Agent Skill for devops & security published in the Unclecheng-li/VulnClaw repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.
CTF密码学攻击知识库 — RSA攻击（小指数/共模/Wiener/Coppersmith）、AES攻击（Padding Oracle/ECB字节翻转/GCM nonce重用）、ECC攻击、LFSR/LCG/PRNG攻击、古典密码、LWE格攻击
QUICK START
How to use this skill
Bring this guide into your coding agent with a prompt tailored to the tool you use.
- Open your project in Codex.
- Copy and paste the prompt below.
- Review files and risks before approving any action.
Prompt to paste
Inspect the Agent Skill at https://github.com/Unclecheng-li/VulnClaw/blob/HEAD/vulnclaw/skills/specialized/ctf-crypto/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/ctf-crypto, but wait for my approval before writing files or running scripts.
Copying this prompt does not install or run the skill. Review third-party files before use.
CTF 密码学攻击知识库
针对 CTF Crypto 题目的实战攻击知识库，提供具体攻击参数、数学公式、Python 代码片段。
与 crypto-toolkit 的区别：
crypto-toolkit→ 编解码操作工具（base64 解码、MD5 哈希、AES 加解密）ctf-crypto→ 密码学攻击知识（RSA 小指数攻击怎么做、Padding Oracle 怎么利用）
核心原则
- 先识别加密体系 — 看密钥长度、加密模式、已知量，确定攻击方向
- 工具验证 — 使用
python_execute执行攻击代码，用crypto_decode做辅助编解码 - 参数敏感 — 密码学攻击对参数极其敏感，必须精确计算
场景路由
| 场景 | 参考文档 | 核心攻击 |
|---|---|---|
| RSA 攻击 | rsa-attacks-cheatsheet.md | 小e/共模/Wiener/Pollard/Fermat/Coppersmith |
| AES/分组密码攻击 | aes-and-block-cipher-attacks.md | ECB翻转/Padding Oracle/GCM nonce重用 |
| ECC 攻击 | ecc-attacks-cheatsheet.md | 小子群/invalid curve/Smart/Pohlig-Hellman |
| PRNG/流密码攻击 | prng-and-stream-cipher-attacks.md | MT19937/LCG/LFSR/RC4 |
| 古典密码 | classic-cipher-attacks.md | Vigenere/XOR频率分析/OTP重用 |
| 格攻击 | lattice-and-lwe-attacks.md | LLL/BKZ/HNP/LWE embedding |
快速判题指南
| 题目特征 | 可能攻击 | 推荐参考 |
|---|---|---|
| 给了 n, e, c | RSA | rsa-attacks-cheatsheet.md |
| e=3 或 e 很小 | RSA 小指数攻击 | rsa-attacks-cheatsheet.md |
| 多组 (n, e, c) 且 n 相同 | RSA 共模攻击 | rsa-attacks-cheatsheet.md |
| n 很大但 e 很大 | Wiener 攻击 | rsa-attacks-cheatsheet.md |
| AES-CBC + 解密 oracle | Padding Oracle | aes-and-block-cipher-attacks.md |
| AES-ECB + 可控明文 | ECB 字节翻转 | aes-and-block-cipher-attacks.md |
| 椭圆曲线参数 | ECC 攻击 | ecc-attacks-cheatsheet.md |
| 给了随机数序列 | PRNG 预测 | prng-and-stream-cipher-attacks.md |
| 给了密文和部分明文 | XOR/流密码 | classic-cipher-attacks.md |
| 矩阵/向量运算 | 格攻击 | lattice-and-lwe-attacks.md |