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#!/usr/bin/env ruby
require 'openssl'
text = "abcdefghijklmnopqrstuvwxyz"
pass = "secret password"
salt = "8 octets" # or nil
alg = "DES-EDE3-CBC"
#alg = "AES-128-CBC"
puts "--Setup--"
puts %(clear text: "#{text}")
puts %(password: "#{pass}")
puts %(salt: "#{salt}")
puts %(cipher alg: "#{alg}")
puts
puts "--Encrypting--"
des = OpenSSL::Cipher::Cipher.new(alg)
des.pkcs5_keyivgen(pass, salt)
des.encrypt
cipher = des.update(text)
cipher << des.final
puts %(encrypted text: #{cipher.inspect})
puts
puts "--Decrypting--"
des = OpenSSL::Cipher::Cipher.new(alg)
des.pkcs5_keyivgen(pass, salt)
des.decrypt
out = des.update(cipher)
out << des.final
puts %(decrypted text: "#{out}")
puts
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