heartcombo--devise/lib/devise/encryptors/authlogic_sha512.rb

require "digest/sha2"

module Devise
  # Implements a way of adding different encryptions.
  # The class should implement a self.digest method that taks the following params:
  #   - password
  #   - stretches: the number of times the encryption will be applied
  #   - salt: the password salt as defined by devise
  #   - pepper: Devise config option
  #
  module Encryptors
    # = AuthlogicSha512
    # Simulates Authlogic's default encryption mechanism.
    # Warning: it uses Devise's stretches configuration to port Authlogic's one. Should be set to 20 in the initializer to silumate
    #  the default behavior.
    class AuthlogicSha512
      
      # Gererates a default password digest based on salt, pepper and the
      # incoming password.
      def self.digest(password, stretches, salt, pepper)
        digest = [password, salt].flatten.join('')
        stretches.times { digest = Digest::SHA512.hexdigest(digest) }
        digest
      end

    end
  end
end