Where is encfs password stored

How and where does encfs store the password for an encrypted directory? I understand that encfs uses encfs6.xml to store the actual decryption key encoded using the password. I also understand that encfs6.xml is the only file required for decryption. I therefore assumed that the password hash should also be stored in the same file. However, I only see encodedKeyData and saltData in the file. What I want to know is how does encfs make sure I have entered the correct password simply with the help of the information present in encfs6.xml