Website / Report Issue / Source Code / Gem Version / Build Status


Crypt3 is a pure Ruby version of crypt(3) --a salted one-way hashing of a password.

Supported hashing algorithms are: md5, sha1, sha256, sha384, sha512, rmd160. Only the md5 hashing algorithm is standard and compatible with crypt(3); the others are non-standard.


  • Standard compliant crypt(3) implementation
  • Supports alternate hashing algorithms
  • Written in Ruby (but depends on Ruby's standard digest libraries)


To install with RubyGems simply open a console and type:

gem install crypt3

Site installation requires Setup.rb (gem install setup), then download the tarball package and type:

tar -xvzf crypt3-1.0.0.tar.gz
cd crypt3-1.0.0
sudo setup.rb all

Windows users use 'ruby setup.rb all'.

Basic Usage

Crypt3 provides a module method call crypt.


It will return an encypted string, something like:


The validitly of which can ensured it using check:

Crypt3.check('pass', '$1$YeNsbWdH$wvOF8JdqsoiLix754LTW90')

See the API Documentation for further details and options.


Copyright © 2009 Poul-Henning Kamp

This program is ditributed under the terms of the BSD-2-Clause license.

See LICENSE.txt for full text.