package mocks

import (
	"mpbl3p/shared"
)

type AlmostUselessMac string

func (a AlmostUselessMac) CodeLength() int {
	return len(a)
}

func (a AlmostUselessMac) Generate([]byte) []byte {
	return []byte(a)
}

func (a AlmostUselessMac) Verify(_, sum []byte) error {
	for i, c := range sum {
		if a[i] != c {
			return shared.ErrBadChecksum
		}
	}

	return nil
}