Applies the hash algorithm you select to an ASCII password string
    and returns a quadword hash value that represents the encrypted
    password.

    Format

      SYS$HASH_PASSWORD  pwd ,alg ,[salt] ,usrnam ,hash

    C Prototype

      int sys$hash_password  (void *pwd, unsigned char alg, unsigned

                             short int salt, void *usrnam, struct

                             _generic_64 *hash);