To install becomeroot or dropbear as alternatives, I have to get internet access, to get it i have to configure pptp client, to configure pptp client i have to get root access . Kind of a dead lock .
It was installed by my friend, who has a wi-fi access point that can manage VPN tunnel itself. He went to another city, so i cant use his help. After installing openssh he didn't try to use it(he didn't set any passwords).