KerberosKey in Swift

There is a login id that authenticates the user with the user id and password as a parameter, which is in java. I have to send the parameter as encryption text using des algorithm. The problem is that they are doing encryption using the KerberosKey generator

KerberosPrincipal KerPr = new KerberosPrincipal("****");

public KerberosKey(KerberosPrincipal principal,
       char[] password,
       String algorithm)

      

        
        
        
      

    

Anything that java provides "javax.security.auth.kerberos". How can I achieve the same in iOS.