one_user

Hello, i'm trying to migrate the osCommerce v 2.x to an PHP8 Server. I have solved some Problems. But now I despair on the new Problem. When i try to Login, every try doesn't work. So i see the Problem is in the "passwordhash.php". My password-hashes stored in the Database like "$P$.......". The function "CheckPassword" will do "crypte_private()". But instead of an correct result, there is only the result "*0". So every Login-Try will fail. Can you help me out?