RsaCtfTool

Multi-attack RSA solver for weak RSA scenarios. Best used as a triage engine: feed known key material, run constrained attacks first, escalate only when signal supports it.

Core workflow

1. Normalize input (.pem, OpenSSH pubkey, or raw n/e).
2. Inspect key parameters and weakness indicators.
3. Select attack families by signal (not brute-force all blindly).
4. Recover private key and/or decrypt ciphertext.
5. Verify output format and cryptographic consistency.

Quick commands

# Recover private key (auto attack selection)
RsaCtfTool --publickey key.pub --private