HCE_MD5

Ruby class to emulate Perl's Crypt::HCE_MD5 module

The MIME Functions are tested and work symmetrically with the Crypt::HCE_MD5 package (0.45) (without the KEYBUG Flag ..). Shamelessly stolen from Eric Estabrooks, eric@urbanrage.com

Crypt::HCE_MD5 package: This package implements a chaining block cipher using a one way hash. This method of encryption is the same that is used by radius (RFC2138) and is also described in Applied Cryptography by Bruce Schneider (p. 353 / "Karn").

The idea is the the two sides have a shared secret that supplies one of the keys and a randomly generated block of bytes provides the second key. The random key is passed in cleartext between the two sides.

Add to your Gemfile:

gem 'hce_md5'

Encryption:

require 'hce_md5'
hce = HCE_MD5.new('samplekey', 'randomkey')
hce.encrypt('text to encrypt')

Decryption:

require 'hce_md5'
hce = HCE_MD5.new('samplekey', 'randomkey')
hce.decrypt(encrypted_text)

Copyright (c) 2015 Sergey V. Beduev

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