Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/fb0sh/pentester/ctf-cryptonpx skills add fb0sh/pentester --skill ctf-cryptogit clone --depth 1 https://github.com/fb0sh/pentesterWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00067 | $0.00752 |
| Opus 5 | $0.00034 | $0.00376 |
| Sonnet 5 | $0.00013 | $0.00150 |
| Haiku 4.5 | $0.00007 | $0.00075 |
Grade A, and why
ctf-crypto scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to ctf-crypto — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
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 |
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 48 lines · 67 tokens per session scan A 0f642e55d735
ctf-crypto is a skill published in the GitHub repository fb0sh/pentester (23 stars, last pushed 1mo ago), licensed MIT. It adds 67 tokens to every session and 752 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to ctf-crypto, differing in 0 lines, and is treated as a copy.
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