hce_md5

HCE_MD5

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, [e-mail]

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.

Installation

Add to your Gemfile:

gem 'hce_md5'

Usage

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)

License

Copyright (c) 2015 Sergey V. Beduev

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.