help with php + ssh

[vitid]

hi, i have problem about php using ssh

 

the problem is that i don't know how to respond to server's authentication request.

 

for example : i use grid-proxy-init command and server will request me to enter the passphrase key

 

(just to note that i didn't get a problem with login to server , i can login successfully but i don't know how to respond to server's request)

 

here is my code:

 

<?php

 

 

if(!($con = ssh2_connect("xxxxxxxxx", 22))){

    echo "fail: unable to establish connection\n";

} else {

   

    if(!ssh2_auth_password($con, "xxxx", "xxxxx")) {

        echo "fail: unable to authenticate\n";

    } else {

       

        echo "okay: logged in...\n";

 

 

 

        $cmd = 'grid-proxy-init -cert cert.pem -key userkey.pem';

        //execute grid-proxy-init command and server will request me to type passphrase(password)

        if(!($stream = ssh2_exec($con,$cmd)) ){

            echo "fail: unable to execute command\n";

        } else{

            //here i can't get this to work , it act like i just login

            //for example : if i type password = ls , it will display

            //all file in directory ; instead of recognize it as passphrase

            $stream = ssh2_exec($con,'password');

            stream_set_blocking( $stream, true );

 

            echo stream_get_contents($stream);

 

            fclose($stream);

 

            echo "success";

        }

 

 

    }

}

?>

 

i try googling for 3 hours and can't find any answer

 

very thank for your help and reply :)