RSAcrack

Overview

If you have a private key (id_rsa) protected by a passphrase and you want to obtain the password, RSAcrack will attempt to obtain the public key with the [ssh-keygen] binary, performing a brute force attack until a successful collision occurs.

Download

wget --no-check-certificate -q "https://raw.githubusercontent.com/d4t4s3c/RSAcrack/refs/heads/main/RSAcrack" && chmod +x RSAcrack

Download & Install (PATH)

wget --no-check-certificate -q "https://raw.githubusercontent.com/d4t4s3c/RSAcrack/refs/heads/main/RSAcrack" -O /usr/bin/RSAcrack && chmod +x /usr/bin/RSAcrack

Usage

RSAcrack -k <KEY> -w <WORDLIST>

Warning

The cracking speed can vary depending on which tool the key is generated with.

Key Generated	Cracking Speed
OpenSSL	✔️
ssh-keygen	❌
PuTTYgen	✔️
8gwifi	✔️