question: public boolean validatePassword ( char [ ] password , String goodHash ) { String [ ] params = goodHash . split ( ":" ) ; int iterations = Integer . parseInt ( params [ ITERATION_INDEX ] ) ; byte [ ] salt = fromHex ( params [ SALT_INDEX ] ) ; byte [ ] hash = fromHex ( params [ PBKDF2_INDEX ] ) ; byte [ ] testHash = pbkdf2 ( password , salt , iterations , hash . length ) ; return slowEquals ( hash , testHash ) ; }
target:  Validates a password using a hash.