Well it might be unconstitutional. Race is a protected class and racial discrimination is explicitly forbidden in the Charter of Rights and Freedoms.

>Everyone is equal and has the right to equal protection and equal benefit of the law without discrimination, especially discrimination based on race, national or ethic origin, color, religion, sex, age, or mental or physical disability. This right does not preclude laws designed to ameliorate disadvantageous conditions that exist because of these factors.

I suppose where it gets messy is that these schools aren't penalizing a specific race like Harvard is, they're boosting 2 other races. Now that last part in the Charter

>This right does not preclude laws designed to ameliorate disadvantageous conditions that exist because of these factors.

might make it legal. The government can make laws to help/protect a race that is affected by discrimination. Can universities make policies that do the same? A court would have to decide, and I don't think anyone has taken these schools to court over this yet.

But I'm not a lawyer, so take that all with a grain of salt.