hashtable

Generate precomputed hash tables from large wordlists. Precompute hash:password pairs for fast reverse searches. Designed for security research and password analysis.

⚠️ DISCLAIMER

This tool is intended for:

• Educational purposes
• Legitimate security research
• Auditing your own systems/passwords

By using this software, you agree:

1. Never to use it on systems/data without explicit ownership or permission
2. Password hashtables may contain sensitive information – do not share generated files
3. You are solely responsible for complying with laws (e.g., GDPR, CFAA) in your jurisdiction
4. Modern secure systems use "salted hashes" – this tool will not work against properly secured passwords

Illegal uses include (but are not limited to):

• Bypassing authentication mechanisms
• Distributing password lists without consent
• Accessing accounts/systems you don’t own

The developer assumes no liability for misuse. Security tools can be weapons – use responsibly.

What Does This Do?

Converts a wordlist (list of passwords) into a file of [hash]:[password] pairs. For example:
Input File (500-worst-passwords.txt):

12345
dragon
qwerty
696969
mustang
letmein

Output File (500-worst-passwords_sha1.txt):

2672275fe0c456fb671e4f417fb2f9892c7573ba:12345
8851def7166796964bf58174a5f3f50d073d709d:dragon
3c8b9f4b983afa9f644d26e2b34fa3e03a2bef16:qwerty
95b679919194b7b37b298b9368f3b89a93e3cde4:696969
059a9d50d1155bb31ad65df3e0cfb20c8f98894b:mustang
34ca062314edaa193e03f318ae20ae134274b358:letmein

Why Use This?

1. Instant Password Lookups

• Services like CrackStation and Weakpass use giant hashtables to instantly find passwords for stolen hashes.
• Without a hashtable, cracking takes hours/days. With it, common passwords are found in seconds.

2. Save Time

• Hashing is slow. This tool does the work upfront so lookups take zero time later.

How to Use

Install Dependencies (OpenSSL):

$ brew install openssl  # macOS
$ sudo apt install libssl-dev  # Linux

Clone & Compile

$ git clone https://github.com/ibnaleem/hashtable.git
$ cd hashtable
$ gcc -o hashtable hashtable.c -I/path/to/openssl/include -L/path/to/openssl/lib -lcrypto
$ ./hashtable <input_file> <hash_type>
# Example:
$ ./hashtable passwords.txt sha512 

Supported Hashes: md5, sha1, sha256, sha512. If you would like more hashing algorithms, please open a PR.

How Websites Use This

Weakpass.com, CrackStation, etc., use multi-billion-entry hashtables. They use a tool like this to generate them. You give them a hash → they check their precomputed list → instantly return the password if it exists.

Contributing

I trust you understand how to contribute to a project on GitHub.

LICENSE

This project is under the GPLv3 License.