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 = "long, unique, and random key"
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
Public Class Methods
# File lib/authlogic/crypto_providers/aes256.rb, line 24 def encrypt(*tokens) aes.encrypt aes.key = @key [aes.update(tokens.join) + aes.final].pack("m").chomp end
# File lib/authlogic/crypto_providers/aes256.rb, line 30 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 Class Methods
# File lib/authlogic/crypto_providers/aes256.rb, line 40 def aes if @key.blank? raise ArgumentError.new( "You must provide a key like #{name}.key = my_key before using the #{name}" ) end @aes ||= openssl_cipher_class.new("AES-256-ECB") end
`::OpenSSL::Cipher::Cipher` has been deprecated since at least 2014, in favor of `::OpenSSL::Cipher`, but a deprecation warning was not printed until 2016 (github.com/ruby/openssl/commit/5c20a4c014) when openssl became a gem. Its first release as a gem was 2.0.0, in ruby 2.4. (See github.com/ruby/ruby/blob/v2_4_0/NEWS)
# File lib/authlogic/crypto_providers/aes256.rb, line 56 def openssl_cipher_class if ::Gem::Version.new(::OpenSSL::VERSION) < ::Gem::Version.new("2.0.0") ::OpenSSL::Cipher::Cipher else ::OpenSSL::Cipher end end