I have SSL-sertificate for www. mydomain.com
How is the right config for nginx to get desired:

• SSL request without www (https://mydomain.com/somefile) will be redirected to https://www. mydomain.com/somefile

This doesn't work, broser shows SSL-warning (wrong domain) :(

server
{
        listen  443 ssl;
        server_name mydomain.com;
        rewrite ^(.*) https://www.mydomain.com$1 permanent;
        ssl_certificate      intermediate.crt;
        ssl_certificate_key  www.mydomain.com.key;
}