What affects dagger damage?

Can anyone give me a definitive answer to this question?

I've been searching around, but between old posts that were made before the most current updates and people who simply like to talk out of their butts, it's hard to tell what's accurate when it comes to daggers.

As far as I can tell, most one-handed perks like Armsman as well as the skill level itself do work with daggers with the exception of weapon-specific perks (since there are none for daggers), while armor enchantments like fortify one-handed do not work with daggers. I'm not clear about potions, but I'm guessing that they don't do anything for daggers, either.

Can anyone confirm this?

And thanks in advance.