c # — AES-RIJNDAEL-256 в PHP небольшая разница

У меня была возможность иметь функцию в php, которая шифрует с помощью метода CBC в шифровании AES-RIJNDAEL-256, но когда я тестировал код, я получил небольшую разницу только в одном письме, которое я не могу понять, откуда именно, вот код php и изображение показывает, что это за другой символ

<?php

$string_0 = "msDoss";
$string_1 = "sALtValue";
$string_3 = "~1B2c3D4e5F6g7H8";

function PBKDF1($pass, $salt, $count, $cb)
{
// This is very approximately the way that the Microsoft version of
// PasswordDeriveBytes works.

///
/// !!!WARNING!!!
///
// This is a BAD function!
// Irrespective of the fact that the use of PBKDF1 is not recommended anyway.
//
// This really should be put into a class with a constructor taking the
// $pass, $salt and $count.
// Then there should be a Reset() method to start from scratch each time a new pwd/salt is used.
// And there should be a GetBytes(int) method to get the required info.
// But for the sake of simplicity we are assuming the same pwd and salt for each call to
// this function. This will not stand up to any scrutiny!

static $base;
static $extra;
static $extracount= 0;
static $hashno;
static $state = 0;

if ($state == 0)
{
$hashno = 0;
$state = 1;

$key = $pass . $salt;
$base = sha1($key, true);
for($i = 2; $i < $count; $i++)
{
$base = sha1($base, true);
}
}

$result = "";

// Check if we have any bytes left over from a previous iteration.
// This is the way MS appears to do it. To me it looks very badly wrong
// in the line: "$result = substr($extra, $rlen, $rlen);"// I'm sure it should be more like "$result = substr($extra, $extracount, $rlen);"// Mono have provided what looks like a fixed version at
// https://github.com/mono/mono/blob/master/mcs/class/corlib/System.Security.Cryptography/PasswordDeriveBytes.cs
// But I'm no cryptographer so I might be wrong.
// But this seems to work for low values of $hashno and seems to work
// with C# implementations.

if ($extracount > 0)
{
$rlen = strlen($extra) - $extracount;
if ($rlen >= $cb)
{
$result = substr($extra, $extracount, $cb);
if ($rlen > $cb)
{
$extracount += $cb;
}
else
{
$extra = null;
$extracount = 0;
}
return $result;
}
$result = substr($extra, $rlen, $rlen);
}

$current = "";
$clen = 0;
$remain = $cb - strlen($result);
while ($remain > $clen)
{
if ($hashno == 0)
{
$current = sha1($base, true);
}
else if ($hashno < 1000)
{
$n = sprintf("%d", $hashno);
$tmp = $n . $base;
$current .= sha1($tmp, true);
}
$hashno++;
$clen = strlen($current);
}

// $current now holds at least as many bytes as we need
$result .= substr($current, 0, $remain);

// Save any left over bytes for any future requests
if ($clen > $remain)
{
$extra = $current;
$extracount = $remain;
}

return $result;
}
$encryption_key= PBKDF1($string_0, $string_1, 7, 32);
?>

Код C #:

    byte[] bytes = Encoding.ASCII.GetBytes(Class27.string_3);
byte[] bytes2 = Encoding.ASCII.GetBytes(Class27.string_1);
byte[] array = Convert.FromBase64String(string_4);
byte[] bytes3 = new PasswordDeriveBytes(Class27.string_0, bytes2, Class27.string_2, 7).GetBytes(32);
ICryptoTransform transform = new RijndaelManaged
{
Mode = CipherMode.CBC
}.CreateDecryptor(bytes3, bytes);