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# frozen_string_literal: true
require 'active_support/core_ext/object/to_query'
require 'rack/utils'
module Redmine
module SudoMode
class SudoRequired < StandardError
end
class Form
include ActiveModel::Validations
attr_accessor :password, :original_fields
validate :check_password
def initialize(password = nil)
self.password = password
end
def check_password
unless password.present? && User.current.check_password?(password)
errors.add(:password, :invalid)
end
end
end
module Helper
# Represents params data from hash as hidden fields
#
# taken from https://github.com/brianhempel/hash_to_hidden_fields
def hash_to_hidden_fields(hash)
cleaned_hash = hash.to_unsafe_h.reject {|k, v| v.nil?}
pairs = cleaned_hash.to_query.split(Rack::Utils::DEFAULT_SEP)
tags = pairs.map do |pair|
key, value = pair.split('=', 2).map {|str| Rack::Utils.unescape(str)}
hidden_field_tag(key, value)
end
tags.join("\n").html_safe
end
end
module Controller
extend ActiveSupport::Concern
included do
around_action :sudo_mode
end
# Sudo mode Around Filter
#
# Checks the 'last used' timestamp from session and sets the
# SudoMode::active? flag accordingly.
#
# After the request refreshes the timestamp if sudo mode was used during
# this request.
def sudo_mode
if sudo_timestamp_valid?
SudoMode.active!
end
yield
update_sudo_timestamp! if SudoMode.was_used?
end
# This renders the sudo mode form / handles sudo form submission.
#
# Call this method in controller actions if sudo permissions are required
# for processing this request. This approach is good in cases where the
# action needs to be protected in any case or where the check is simple.
#
# In cases where this decision depends on complex conditions in the model,
# consider the declarative approach using the require_sudo_mode class
# method and a corresponding declaration in the model that causes it to throw
# a SudoRequired Error when necessary.
#
# All parameter names given are included as hidden fields to be resubmitted
# along with the password.
#
# Returns true when processing the action should continue, false otherwise.
# If false is returned, render has already been called for display of the
# password form.
#
# if @user.mail_changed?
# require_sudo_mode :user or return
# end
#
def require_sudo_mode(*param_names)
return true if SudoMode.active?
if param_names.blank?
param_names = params.keys - %w(id action controller sudo_password _method authenticity_token utf8)
end
process_sudo_form
if SudoMode.active?
true
else
render_sudo_form param_names
false
end
end
# display the sudo password form
def render_sudo_form(param_names)
@sudo_form ||= SudoMode::Form.new
@sudo_form.original_fields = params.slice( *param_names )
# a simple 'render "sudo_mode/new"' works when used directly inside an
# action, but not when called from a before_action:
respond_to do |format|
format.html {render 'sudo_mode/new'}
format.js {render 'sudo_mode/new'}
end
end
# handle sudo password form submit
def process_sudo_form
if params[:sudo_password]
@sudo_form = SudoMode::Form.new(params[:sudo_password])
if @sudo_form.valid?
SudoMode.active!
else
flash.now[:error] = l(:notice_account_wrong_password)
end
end
end
def sudo_timestamp_valid?
session[:sudo_timestamp].to_i > SudoMode.timeout.ago.to_i
end
def update_sudo_timestamp!(new_value = Time.now.to_i)
session[:sudo_timestamp] = new_value
end
# Before Filter which is used by the require_sudo_mode class method.
class SudoRequestFilter < Struct.new(:parameters, :request_methods)
def before(controller)
method_matches = request_methods.blank? || request_methods.include?(controller.request.method_symbol)
if controller.api_request?
true
elsif SudoMode.possible? && method_matches
controller.require_sudo_mode( *parameters )
else
true
end
end
end
module ClassMethods
# Handles sudo requirements for the given actions, preserving the named
# parameters, or any parameters if you omit the :parameters option.
#
# Sudo enforcement by default is active for all requests to an action
# but may be limited to a certain subset of request methods via the
# :only option.
#
# Examples:
#
# require_sudo_mode :account, only: :post
# require_sudo_mode :update, :create, parameters: %w(role)
# require_sudo_mode :destroy
#
def require_sudo_mode(*args)
actions = args.dup
options = actions.extract_options!
filter = SudoRequestFilter.new Array(options[:parameters]), Array(options[:only])
before_action filter, only: actions
end
end
end
# true if the sudo mode state was queried during this request
def self.was_used?
!!RequestStore.store[:sudo_mode_was_used]
end
# true if sudo mode is currently active.
#
# Calling this method also turns was_used? to true, therefore
# it is important to only call this when sudo is actually needed, as the last
# condition to determine whether a change can be done or not.
#
# If you do it wrong, timeout of the sudo mode will happen too late or not at
# all.
def self.active?
if !!RequestStore.store[:sudo_mode]
RequestStore.store[:sudo_mode_was_used] = true
end
end
def self.active!
RequestStore.store[:sudo_mode] = true
end
def self.possible?
enabled? && User.current.logged?
end
# Turn off sudo mode (never require password entry).
def self.disable!
RequestStore.store[:sudo_mode_disabled] = true
end
# Turn sudo mode back on
def self.enable!
RequestStore.store[:sudo_mode_disabled] = nil
end
def self.enabled?
Redmine::Configuration['sudo_mode'] && !RequestStore.store[:sudo_mode_disabled]
end
# Timespan after which sudo mode expires when unused.
def self.timeout
m = Redmine::Configuration['sudo_mode_timeout'].to_i
(m > 0 ? m : 15).minutes
end
end
end