I watch that show too much and it seems there is nothing they can't search or if they can't get access to they'll confiscate and send the device to some lab in Ottawa. If the intent of the show is to portray them as *ssholes then mission accomplished.
US Customs has the same power, within 100 miles of all borders. It's rarely used, but this means they have nearly unlimited search abilities over about 65% of the population.
