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# frozen_string_literal: true
# == Schema Information
#
# Table name: system_keys
#
# id :bigint(8) not null, primary key
# key :binary
# created_at :datetime not null
# updated_at :datetime not null
#
class SystemKey < ApplicationRecord
ROTATION_PERIOD = 1.week.freeze
before_validation :set_key
scope :expired, ->(now = Time.now.utc) { where(arel_table[:created_at].lt(now - ROTATION_PERIOD * 3)) }
class << self
def current_key
previous_key = order(id: :asc).last
if previous_key && previous_key.created_at >= ROTATION_PERIOD.ago
previous_key.key
else
create.key
end
end
end
private
def set_key
return if key.present?
cipher = OpenSSL::Cipher.new('AES-256-GCM')
cipher.encrypt
self.key = cipher.random_key
end
end
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