require 'bcrypt' module ActiveModel module SecurePassword extend ActiveSupport::Concern module ClassMethods # Adds methods to set and authenticate against a BCrypt password. # This mechanism requires you to have a password_digest attribute. # # Validations for presence of password, confirmation of password (using # a "password_confirmation" attribute) are automatically added. # You can add more validations by hand if need be. # # Example using Active Record (which automatically includes ActiveModel::SecurePassword): # # # Schema: User(name:string, password_digest:string) # class User < ActiveRecord::Base # has_secure_password # end # # user = User.new(:name => "david", :password => "", :password_confirmation => "nomatch") # user.save # => false, password required # user.password = "mUc3m00RsqyRe" # user.save # => false, confirmation doesn't match # user.password_confirmation = "mUc3m00RsqyRe" # user.save # => true # user.authenticate("notright") # => false # user.authenticate("mUc3m00RsqyRe") # => user # User.find_by_name("david").try(:authenticate, "notright") # => nil # User.find_by_name("david").try(:authenticate, "mUc3m00RsqyRe") # => user def has_secure_password attr_reader :password attr_accessor :password_confirmation attr_protected(:password_digest) if respond_to?(:attr_protected) validates_confirmation_of :password validates_presence_of :password_digest end end # Returns self if the password is correct, otherwise false. def authenticate(unencrypted_password) if BCrypt::Password.new(password_digest) == unencrypted_password self else false end end # Encrypts the password into the password_digest attribute. def password=(unencrypted_password) @password = unencrypted_password self.password_digest = BCrypt::Password.create(unencrypted_password) end end end