Maximum length for password?

Question

Hashing

When hashing, I use argon2i in mysql; password varchar has a maximum length of 255. What is the maximum length of the input for entering a password on the site 255 !? The length of the hash depends on the password??

Answer 1

the size of the hash does not depend on the size of the input data
; at least you feed 10 bytes, at least 10 terabytes - the hash size will be the same.

Answer 2

What is the maximum length of the input to enter the password

Be guided by common sense. It is unlikely that anyone will use long passwords.
More than 30 probably does not make sense. Next, see how your hash transforms such passwords. Maybe 255 won't be enough.