RsaCtfTool.py

all

RSA attack tool for CTF challenges - recover private keys from weak public keys and/or decrypt data.

Examples (7)

Recover a private key from a public key file

RsaCtfTool.py --publickey path/to/key.pub --private

Decrypt a file using a public key

RsaCtfTool.py --publickey path/to/key.pub --decryptfile path/to/ciphered_file

Decrypt a specific ciphertext string

RsaCtfTool.py --publickey path/to/key.pub --decrypt "ciphertext"

Dump RSA key components (e.g., modulus, exponent) from a key file

RsaCtfTool.py --dumpkey --key path/to/key.pub

Run a specific attack (e.g., Fermat factorization) to recover the private key

RsaCtfTool.py --publickey path/to/key.pub --private --attack fermat

Generate a public key from modulus (n) and exponent (e)

RsaCtfTool.py --createpub -n modulus -e exponent

Attempt all available attacks to recover the private key

RsaCtfTool.py --publickey path/to/key.pub --private --attack all