lib/door_mat/attr_asymmetric_store.rb
module DoorMat
module AttrAsymmetricStore
class AttrAsymmetricStoreWrapper
def initialize(attribute, actor_column)
@attribute = attribute
@actor_column = actor_column
end
def after_find(record)
return if DoorMat::Crypto.current_skip_crypto_callback.skip?
# leave attribute as-is if blank or the actor is not set
encrypted_attribute = record.send("#{@attribute}")
actor = record.send("#{@actor_column}")
return if encrypted_attribute.blank? || actor.blank?
clear_attribute = nil
DoorMat::Session.current_session.autoload_sesion_for(actor)
DoorMat::Session.current_session.with_session_for_actor(actor) do |session|
clear_attribute = actor.decrypt_shared_key(encrypted_attribute, session)
end
if clear_attribute.nil?
clear_attribute = '[ENCRYPTED SHARED KEY]'
end
record.send("#{@attribute}=", clear_attribute)
DoorMat.configuration.logger.debug "DEBUG: Decrypt #{@attribute}: #{encrypted_attribute} -> #{clear_attribute}" if Rails.env.development?
end
def around_save(record)
return yield if DoorMat::Crypto.current_skip_crypto_callback.skip?
clear_attribute = record.send("#{@attribute}")
actor = record.send("#{@actor_column}")
# leave attribute as-is if blank or the actor is not set
if clear_attribute.blank? || actor.blank?
yield
else
encrypted_attribute = actor.encrypt_shared_key(clear_attribute)
DoorMat.configuration.logger.debug "DEBUG: Encrypt #{@attribute}: #{clear_attribute} -> #{encrypted_attribute}" if Rails.env.development?
record.send("#{@attribute}=", encrypted_attribute)
yield
record.send("#{@attribute}=", clear_attribute)
DoorMat.configuration.logger.debug "DEBUG: Decrypt #{@attribute}: #{encrypted_attribute} -> #{clear_attribute}" if Rails.env.development?
end
end
end
def self.included(base)
base.extend ClassMethods
end
module ClassMethods
def attr_asymmetric_store(*args, **options)
return unless self.table_exists?
actor_column = options.fetch(:actor_column, :actor).to_s
unless self.attribute_names.include? "#{actor_column}_id"
raise ActiveRecord::ActiveRecordError, "attr_asymmetric_store records must belong to a DoorMat::Actor but could not find the actor column. Pass the actor_column: :actor_column_name option to specify it."
end
args.each do |arg|
column_type = (self.columns_hash[arg.to_s].cast_type.respond_to?(:type) && self.columns_hash[arg.to_s].cast_type.type) || self.columns_hash[arg.to_s].cast_type.to_s
if [:text, :string].include? column_type
after_find DoorMat::AttrAsymmetricStore::AttrAsymmetricStoreWrapper.new(arg.to_s, actor_column)
around_save DoorMat::AttrAsymmetricStore::AttrAsymmetricStoreWrapper.new(arg.to_s, actor_column)
else
raise ActiveRecord::ActiveRecordError, "attr_asymmetric_store only support text and string column types."
end
end
end
end
end
end