[Koha] Password Encryption

Hi I have uploaded a number of patron records via a pup script. However, the password are not working. I have used md5 function. I would like to know which encryption method is used for passwords in Koha. Kind Regards, Admire Mutsikiwa ICT Projects Manager Libraries University of Zimbabwe Tel:+263-4-303276 "It is easy to dodge our responsibilities, but we cannot dodge the consequences of dodging our responsibilities." Josiah Charles Stamp, 1880-1941, former director of the Bank of England