module OmniAuth::Identity::SecurePassword::ClassMethods

Public Instance Methods

has_secure_password(attribute = :password, validations: true) click to toggle source

Adds methods to set and authenticate against a BCrypt password. This mechanism requires you to have a XXX_digest attribute. Where XXX is the attribute name of your desired password.

The following validations are added automatically:

  • Password must be present on creation

  • Password length should be less than or equal to 72 bytes

  • Confirmation of password (using a XXX_confirmation attribute)

If confirmation validation is not needed, simply leave out the value for XXX_confirmation (i.e. don't provide a form field for it). When this attribute has a nil value, the validation will not be triggered.

For further customizability, it is possible to suppress the default validations by passing validations: false as an argument.

Add bcrypt (~> 3.1.7) to Gemfile to use has_secure_password:

gem 'bcrypt', '~> 3.1.7'

Example using Active Record (which automatically includes ActiveModel::SecurePassword):

# Schema: User(name:string, password_digest:string, recovery_password_digest:string)
class User < ActiveRecord::Base
  has_secure_password
  has_secure_password :recovery_password, validations: false
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.recovery_password = "42password"
user.recovery_password_digest                              # => "$2a$04$iOfhwahFymCs5weB3BNH/uXkTG65HR.qpW.bNhEjFP3ftli3o5DQC"
user.save                                                  # => true
user.authenticate('notright')                              # => false
user.authenticate('mUc3m00RsqyRe')                         # => user
user.authenticate_recovery_password('42password')          # => user
User.find_by(name: 'david')&.authenticate('notright')      # => false
User.find_by(name: 'david')&.authenticate('mUc3m00RsqyRe') # => user
# File lib/omniauth/identity/secure_password.rb, line 71
def has_secure_password(attribute = :password, validations: true)
  # 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
    warn "You don't have bcrypt installed in your application. Please add it to your Gemfile and run bundle install"
    raise
  end

  include InstanceMethodsOnActivation.new(attribute)

  if validations
    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
    # so that the error message will make sense to the end-user.
    validate do |record|
      record.errors.add(attribute, :blank) unless record.public_send("#{attribute}_digest").present?
    end

    validates_length_of attribute, maximum: ActiveModel::SecurePassword::MAX_PASSWORD_LENGTH_ALLOWED
    validates_confirmation_of attribute, allow_blank: true
  end
end