import hashlib

from kfet.models import Account

class KFetBackend(object):
    def authenticate(self, request):
        password = request.META.get('HTTP_KFETPASSWORD')
        if not password:
            return None

        try:
            password_sha1 = hashlib.sha1(password.encode()).hexdigest()
            account = Account.objects.get(password=password_sha1)
            user = account.cofprofile.user
        except Account.DoesNotExist:
            return None

        return user