diff options
Diffstat (limited to 'activemodel/lib/active_model/secure_password.rb')
| -rw-r--r-- | activemodel/lib/active_model/secure_password.rb | 43 |
1 files changed, 28 insertions, 15 deletions
diff --git a/activemodel/lib/active_model/secure_password.rb b/activemodel/lib/active_model/secure_password.rb index 01739d8ae4..f6ad35769f 100644 --- a/activemodel/lib/active_model/secure_password.rb +++ b/activemodel/lib/active_model/secure_password.rb @@ -2,6 +2,11 @@ module ActiveModel module SecurePassword extend ActiveSupport::Concern + # BCrypt hash function can handle maximum 72 characters, and if we pass + # password of length more than 72 characters it ignores extra characters. + # Hence need to put a restriction on password length. + MAX_PASSWORD_LENGTH_ALLOWED = 72 + class << self attr_accessor :min_cost # :nodoc: end @@ -11,18 +16,22 @@ module ActiveModel # 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 on create, confirmation of password - # (using a +password_confirmation+ attribute) are automatically added. If - # you wish to turn off validations, pass <tt>validations: false</tt> as an - # argument. You can add more validations by hand if need be. + # The following validations are added automatically: + # * Password must be present on creation + # * Password length should be less than or equal to 72 characters + # * Confirmation of password (using a +password_confirmation+ attribute) + # + # If password confirmation validation is not needed, simply leave out the + # value for +password_confirmation+ (i.e. don't provide a form field for + # it). When this attribute has a +nil+ value, the validation will not be + # triggered. # - # If you don't need the confirmation validation, just don't set any - # value to the password_confirmation attribute and the validation - # will not be triggered. + # For further customizability, it is possible to supress the default + # validations by passing <tt>validations: false</tt> as an argument. # - # You need to add bcrypt-ruby (~> 3.1.2) to Gemfile to use #has_secure_password: + # Add bcrypt (~> 3.1.7) to Gemfile to use #has_secure_password: # - # gem 'bcrypt-ruby', '~> 3.1.2' + # gem 'bcrypt', '~> 3.1.7' # # Example using Active Record (which automatically includes ActiveModel::SecurePassword): # @@ -42,21 +51,21 @@ module ActiveModel # User.find_by(name: 'david').try(:authenticate, 'notright') # => false # User.find_by(name: 'david').try(:authenticate, 'mUc3m00RsqyRe') # => user def has_secure_password(options = {}) - # Load bcrypt-ruby only when has_secure_password is used. + # Load bcrypt gem only when has_secure_password is used. # This is to avoid ActiveModel (and by extension the entire framework) # being dependent on a binary library. begin require 'bcrypt' rescue LoadError - $stderr.puts "You don't have bcrypt-ruby installed in your application. Please add it to your Gemfile and run bundle install" + $stderr.puts "You don't have bcrypt installed in your application. Please add it to your Gemfile and run bundle install" raise end - attr_reader :password - include InstanceMethodsOnActivation if options.fetch(:validations, true) + include ActiveModel::Validations + # This ensures the model has a password by checking whether the password_digest # is present, so that this works with both new and existing records. However, # when there is an error, the message is added to the password attribute instead @@ -65,9 +74,11 @@ module ActiveModel record.errors.add(:password, :blank) unless record.password_digest.present? end + validates_length_of :password, maximum: ActiveModel::SecurePassword::MAX_PASSWORD_LENGTH_ALLOWED validates_confirmation_of :password, if: ->{ password.present? } end + # This code is necessary as long as the protected_attributes gem is supported. if respond_to?(:attributes_protected_by_default) def self.attributes_protected_by_default #:nodoc: super + ['password_digest'] @@ -91,8 +102,10 @@ module ActiveModel BCrypt::Password.new(password_digest) == unencrypted_password && self end + attr_reader :password + # Encrypts the password into the +password_digest+ attribute, only if the - # new password is not blank. + # new password is not empty. # # class User < ActiveRecord::Base # has_secure_password validations: false @@ -106,7 +119,7 @@ module ActiveModel def password=(unencrypted_password) if unencrypted_password.nil? self.password_digest = nil - elsif unencrypted_password.present? + elsif !unencrypted_password.empty? @password = unencrypted_password cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST : BCrypt::Engine.cost self.password_digest = BCrypt::Password.create(unencrypted_password, cost: cost) |