https://github.com/d4t4s3c/rsacrack

Obtain the passphrase of a private key (id_rsa), this tool uses the ssh-keygen binary to perform a brute force attack until a successful collision occurs.
https://github.com/d4t4s3c/rsacrack

brute-force bruteforce bruteforce-attacks bruteforce-password-cracker bruteforce-tools bruteforcer bruteforcing crack cracking cracking-password passphrase password password-cracker private-key rsa-key rsa-key-encryption ssh ssh-key

Last synced: 3 months ago
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Obtain the passphrase of a private key (id_rsa), this tool uses the ssh-keygen binary to perform a brute force attack until a successful collision occurs.

• Host: GitHub
• URL: https://github.com/d4t4s3c/rsacrack
• Owner: d4t4s3c
• License: gpl-3.0
• Created: 2021-06-02T14:49:55.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2025-03-24T09:27:11.000Z (7 months ago)
• Last Synced: 2025-04-09T20:12:05.276Z (6 months ago)
• Topics: brute-force, bruteforce, bruteforce-attacks, bruteforce-password-cracker, bruteforce-tools, bruteforcer, bruteforcing, crack, cracking, cracking-password, passphrase, password, password-cracker, private-key, rsa-key, rsa-key-encryption, ssh, ssh-key
• Language: Shell
• Homepage:
• Size: 1.24 MB
• Stars: 71
• Watchers: 2
• Forks: 14
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
### RSAcrack

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### 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](https://manpages.ubuntu.com/manpages/noble/man1/ssh-keygen.1.html)] binary, performing a **brute force** attack until a successful collision occurs.

![](/img/img.png)

### Download

```sh

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

```

### Download & Install (PATH)

```cmd

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

```cmd

RSAcrack -k  -w 

```

> [!WARNING]

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

| Key Generated | Cracking Speed     |

|---------------|--------------------|

| [OpenSSL](https://linux.die.net/man/1/openssl) | :heavy_check_mark: |

| [ssh-keygen](https://linux.die.net/man/1/ssh-keygen) | :x: |

| [PuTTYgen](https://linux.die.net/man/1/puttygen) | :heavy_check_mark: |

| [8gwifi](https://8gwifi.org/sshfunctions.jsp) | :heavy_check_mark: |