Hash function in c# not giving expected hashed password

Question

I know that this question is already asked many times but actually till now I can't find the right one for me so please help. I want to insert new users in moodle's database by a script written in c#. What i want to do is to insert the username and a password to that user from this script. So i need to insert the hashed password. All my hashed passwords begin with "$2y$10$". In c# I tried several ways and it didn't give me the same password. For ex. I tried :

string cryptedPassword = Crypter.Blowfish.Crypt(password);

It gives me

$2a&06&bQuFKC8fVPYQsGbQj3sL7uoZByn7tRc4enxBeiN2k1wu5iyubTIyi

although the expected one is

$2y$10$SNUjOqCuwKodg0E126mHUO2NzMBnIHZl/fD/Q2wEv4hg.y5y2j4VC

. Also the following is giving true so the crypter can hash my password in the same way as moodle script does:

bool matches = Crypter.CheckPassword(password, "$2y$10$SNUjOqCuwKodg0E126mHUO2NzMBnIHZl/fD/Q2wEv4hg.y5y2j4VC");

How can i specify the hash-algorithm = 2y = BCrypt and cost-factor = 10 = 2^10 iterations in 'Crypter.Blowfish' in a way to have the same hashed password as expected? Any help is appreciated. Thanks in advance

Answer 1

Function Crypter.Blowfish.Crypt set the second parameter Salt, try to set it, because when you don't set Salt parameter module used random salt for each running try this

string cryptedPassword = Crypter.Blowfish.Crypt(password,"some_SALT");

Answer 2

Just to show as an answer and not as a comment (more readable):

as @y.h commented:

string result = Crypter.Blowfish.Crypt(cadena, 
                new CrypterOptions()
                {
                    { CrypterOption.Variant, BlowfishCrypterVariant.Corrected }, 
                    { CrypterOption.Rounds, 6 }
                });

This will produce something like:

$2y$06$xkdTy5YwKmMCDP6vQGC5A.YgZkKxv17xQQfMyIUNfNWazd4pqqibK

Which is a valid 2y version (plus round factor 6 )

Cheers!