module Encrypt

# File lib/encrypt.rb, line 4
def self.dump string, key
  cipher = OpenSSL::Cipher::AES256.new(:CBC)
  cipher.encrypt
  salt = OpenSSL::Random.random_bytes(16)
  cipher.key = OpenSSL::PKCS5.pbkdf2_hmac_sha1(key, salt, 20000, 32)
  iv = cipher.random_iv
  Marshal.dump([salt, iv, cipher.update(string) << cipher.final])
end

# File lib/encrypt.rb, line 13
def self.load string, key
  salt, iv, encrypted = Marshal.load(string)
  cipher = OpenSSL::Cipher::AES256.new(:CBC)
  cipher.decrypt
  cipher.key = OpenSSL::PKCS5.pbkdf2_hmac_sha1(key, salt, 20000, 32)
  cipher.iv = iv
  cipher.update(encrypted) << cipher.final
end