Yeah, I do understand that we, like the US, also have a Constitution. Do you? Our Constitution includes a Charter of Rights and Freedoms which protects against unreasonable search and seizure. You should look it up sometime. Here’s a starting point from the Canadian Encyclopedia:
Edit: I should also say that protections against unreasonable search and seizure long predate the Canadian and US Constitutions and are derived from our countries’ common lineage back to England. If you are ever confused about why Canada and US have many similar rights and freedoms, it is because both Canada and the US were British colonies before achieving independence.