class Authlogic::CryptoProviders::AES256

This encryption method is reversible if you have the supplied key. So in order to use this encryption method you must supply it with a key first. In an initializer, or before your application initializes, you should do the following:

Authlogic::CryptoProviders::AES256.key = "my really long and unique key, preferrably a bunch of random characters"

My final comment is that this is a strong encryption method, but its main weakness is that it's reversible. If you do not need to reverse the hash then you should consider Sha512 or BCrypt instead.

Keep your key in a safe place, some even say the key should be stored on a separate server. This won't hurt performance because the only time it will try and access the key on the separate server is during initialization, which only happens once. The reasoning behind this is if someone does compromise your server they won't have the key also. Basically, you don't want to store the key with the lock.

Attributes

key[W]

Public Instance Methods

encrypt(*tokens) click to toggle source
# File lib/authlogic/crypto_providers/aes256.rb, line 21
def encrypt(*tokens)
  aes.encrypt
  aes.key = @key
  [aes.update(tokens.join) + aes.final].pack("m").chomp
end
matches?(crypted, *tokens) click to toggle source
# File lib/authlogic/crypto_providers/aes256.rb, line 27
def matches?(crypted, *tokens)
  aes.decrypt
  aes.key = @key
  (aes.update(crypted.unpack("m").first) + aes.final) == tokens.join
rescue OpenSSL::CipherError
  false
end

Private Instance Methods

aes() click to toggle source
# File lib/authlogic/crypto_providers/aes256.rb, line 36
def aes
  raise ArgumentError.new("You must provide a key like #{name}.key = my_key before using the #{name}") if @key.blank?
  @aes ||= OpenSSL::Cipher::Cipher.new("AES-256-ECB")
end