Class: Authmagic::Modules::LoginPassword

Inherits:
Object
  • Object
show all
Defined in:
lib/authmagic/rails/modules/login_password.rb

Overview

Login/password authentication provider for Rails.

DEPENDENCIES

application_framework

Defined Under Namespace

Modules: SessionControllerMethods

Constant Summary collapse

DEPENDENCIES = 
[:application_framework].freeze

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ LoginPassword

Returns a new instance of LoginPassword.



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# File 'lib/authmagic/rails/modules/login_password.rb', line 7

def initialize(context)
  @context = context
end

Instance Method Details

#enroll ⇒ Object 



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# File 'lib/authmagic/rails/modules/login_password.rb', line 11

def enroll
  principal = @context.principal

  cfg = @context.config.principal
   = cfg.fetch(:login_field, :login)
  case_sensitive = case cfg.fetch(:compare, :case_sensitive)
  when :cs, :case_sensitive then true
  when :ci, :case_insensitive then false
  else raise 'bad :compare value'
  end
  password_get = cfg.fetch(:password_field, :password)
  password_set, password_var = :"#{password_get}=", :"@#{password_get}"
  password_valid = :"#{password_get}_valid?"
  password_hash = cfg.fetch(:password_hash_field, :"#{password_get}_hash")
  password_hash_set = :"#{password_hash}="
  salt_get = cfg.fetch(:password_salt_field, :"#{password_get}_salt")
  salt_set = :"#{salt_get}="
  encryptor = :"encrypt_#{password_get}"
  generate_salt = :"generate_#{salt_get}"

  digest = cfg.fetch(:digest) do
    require 'digest/sha2'
    Digest::SHA512
  end
  digest = "Digest::#{digest.camelize}".constantize unless digest.is_a?(Class)
  stretches = cfg.fetch(:stretches, 100)
  salt_length = cfg.fetch(:salt_length, 64)

  cols = principal.columns_hash
  col_pass_hash, col_salt = cols[password_hash.to_s], cols[salt_get.to_s]
  raise "missing required attribute #{password_hash} from #{principal} model" unless col_pass_hash
  raise "missing required attribute #{salt_get} from #{principal} model" unless col_salt

  hexdigest = col_pass_hash.type != :binary
  secran_salt = col_salt.type == :binary ? :random_bytes : :hex

  principal.class_eval do
    self.class.send(:define_method, :authenticate_with_login_password) do |options|
      conditions = case_sensitive ?
        { => options[]} :
        ["lower(#{connection.quote_column_name()}) = lower(?)", options[]]
      returning first(:conditions => conditions) do |p|
        raise AccountNotFound unless p
        raise BadPassword unless p.send(password_valid, options[password_get])
      end
    end

    attr_reader password_get

    define_method password_set do |passw|
      instance_variable_set(password_var, passw)
      send(generate_salt)
      send(password_hash_set, send(encryptor, passw))
    end

    define_method password_valid do |passw|
      send(password_hash) == send(encryptor, passw)
    end

    define_method encryptor do |plaintext|
      dg, salt, hash = digest.new, send(salt_get), ''
	stretches.times { hash = (dg << salt << plaintext << hash).digest! }
      hexdigest ? Digest.hexencode(hash) : hash
    end

    define_method generate_salt do
      send(salt_set, ActiveSupport::SecureRandom.send(secran_salt, salt_length))
    end
  end

			@context.config.session_controller_name.constantize.send(:include, SessionControllerMethods)
end