= Customize password requirements

By default, Rodauth requires passwords to have at least 6 characters. You can
modify the minimum and maximum length:

  plugin :rodauth do
    enable :login, :logout, :create_account

    # Require passwords to have at least 8 characters
    password_minimum_length 8

    # Don't allow passwords to be too long, to prevent long password DoS attacks
    password_maximum_length 64
  end

You can use the {disallow common passwords feature}[rdoc-ref:doc/disallow_common_passwords.rdoc]
to prevent the usage of common passwords (the most common 10,000 by default).

You can use additional complexity checks on passwords via the {password
complexity feature}[rdoc-ref:doc/password_complexity.rdoc], though most of
those complexity checks are no longer considered modern security best
practices and are likely to decrease overall security.

If you want complete control over whether passwords meet requirements, you
can use the <tt>password_meets_requirements?</tt> configuration method.

  plugin :rodauth do
    enable :login, :logout, :create_account

    password_meets_requirements? do |password|
      super(password) && password_complex_enough?(password)
    end

    auth_class_eval do
      # If password doesn't pass custom validation, add field error with error
      # reason, and return false.
      def password_complex_enough?(password)
        return true if password.match?(/\d/) && password.match?(/[^a-zA-Z\d]/)
        set_password_requirement_error_message(:password_simple, "requires one number and one special character")
        false
      end
    end
  end