get same response in php as Rfc2898DeriveBytes gives in c# - php

Question

This is my C# code but I want same encrypted string in PHP. Can you please help me in any way.
var token ="MqsXexqpYRUNAHR_lHkPRic1g1BYhH6bFNVPagEkuaL8Mf80l_tOirhThQYIbfWYErgu4bDwl-7brVhXTWnJNQ2";
var id = "bob#company.com";
var ssokey = "7MpszrQpO95p7H";
string idAndKey = id + ssokey;
var salt = HttpServerUtility.UrlTokenDecode(token);
var pbkdf2 = new Rfc2898DeriveBytes(idAndKey, salt) {IterationCount = 1000};
var key = HttpServerUtility.UrlTokenEncode(pbkdf2.GetBytes(24));
//key = aE1k9-djZ66WbUATqdHbWyJzskMI5ABS0;
My PHP code is:
function base64url_encode($data) {
return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
}
function base64url_decode($data) {
return base64_decode(str_pad(strtr($data, '-_', '+/'),strlen($data) % 4, '=', STR_PAD_RIGHT));
}
$token = "MqsXexqpYRUNAHR_lHkPRic1g1BYhH6bFNVPagEkuaL8Mf80l_tOirhThQYIbfWYErgu4bDwl-7brVhXTWnJNQ2";
$id = "bob#company.com";
$ssokey = "7MpszrQpO95p7H";
$idAndKey = $id.$ssokey;
$salt = base64_decode(base64url_decode($token));
$pbkdf2 = openssl_pbkdf2($idAndKey,$salt,20,1000);
$key = base64url_encode(base64_encode($pbkdf2));
//should produce key = aE1k9-djZ66WbUATqdHbWyJzskMI5ABS0
echo "key = ".$key; exit;
It should give aE1k9-djZ66WbUATqdHbWyJzskMI5ABS0 but is produced differently.
Any help is appreciated.

Answer 1

$idandKey = "bob#company.com" . "7MpszrQpO95p7H";
$salt = convertFromUrlTokenFormat("MqsXexqpYRUNAHR_lHkPRic1g1BYhH6bFNVPagEkuaL8Mf80l_tOirhThQYIbfWYErgu4bDwl-7brVhXTWnJNQ2");
$hash = hash_pbkdf2("sha1", $idandKey, base64_decode($salt), 1000, 24, true);
$key = convertToUrlTokenFormat(base64_encode($hash));
// key = “aE1k9-djZ66WbUATqdHbWyJzskMI5ABS0”;
function convertToUrlTokenFormat($val){
$padding = substr_count($val, '=');
$val = str_replace('=', '', $val);
$val .= $padding;
$val = str_replace('+', '-', str_replace('/', '_', $val));
return $val;
}
function convertFromUrlTokenFormat($val){
$val = str_replace('-', '+', str_replace('_', '/', $val));
$lastCharacter = substr($val, -1);
$val = substr($val, 0, -1);
switch($lastCharacter){
case 1:
$val = $val . "=";
break;
case 2:
$val = $val . "==";
break;
}
return $val;
}