Entschlüsseln von Strings in C#, die verschlüsselt wurde, mit PHP openssl_encrypt

Ich habe einen Kunden verschlüsseln einen string in PHP mit dem folgenden code:

    $password = 'Ty63rs4aVqcnh2vUqRJTbNT26caRZJ';
    $method = 'AES-256-CBC';
    texteACrypter = 'Whether you think you can, or you think you can\'t--you\'re right. - Henry Ford';

    $encrypted = openssl_encrypt($texteACrypter, $method, $password);

die Ergebnisse in dieser verschlüsselten Ausgabe: MzVWX4tH4yZWc/w75zUagUMEsP34ywSYISsIIS9fj0W3Q/lR0hBrHmdvMOt106PlKhN/1zXFBPbyKmI6nWC5BN54GuGFSjkxfuansJkfoi0=

Wenn ich versuche zu entschlüsseln, dass Strings in C# gibt es mir einen Haufen von junk-etwa so: Z�o�}'*2��I4y�J6S��
��xz���{9^�ED�fF
�}��گs�)�Q���i��$)�

Ich habe versucht, die änderung der Polsterung, mit AesManaged statt RijndaelManaged, ändern die keysize, mit einem anderen Schlüssel, etc. Alle Ergebnisse in entweder verschiedenen junk-E-Saiten oder verschiedene Ausnahmen. Ich muss fehlt etwas wirklich grundlegendes hier, aber ich bin mir nicht sicher, was anderes zu versuchen, an dieser Stelle.

Hier ist mein Entschlüsselungs-code (die ich schamlos kopiert aus einem anderen stackoverflow-Frage: openssl mit nur .NET-Klassen)

class Program
{
    //https://stackoverflow.com/questions/5452422/openssl-using-only-net-classes
    static void Main(string[] args)
    {
        var secret = "Ty63rs4aVqcnh2vUqRJTbNT26caRZJ";
        var encrypted = "MzVWX4tH4yZWc/w75zUagUMEsP34ywSYISsIIS9fj0W3Q/lR0hBrHmdvMOt106PlKhN/1zXFBPbyKmI6nWC5BN54GuGFSjkxfuansJkfoi0=";

        var yeah = OpenSSLDecrypt(encrypted, secret);
        Console.WriteLine(yeah);
        Console.ReadKey();
    }

    public static string OpenSSLDecrypt(string encrypted, string passphrase)
    {
        //base 64 decode
        byte[] encryptedBytesWithSalt = Convert.FromBase64String(encrypted);
        //extract salt (first 8 bytes of encrypted)
        byte[] salt = new byte[8];
        byte[] encryptedBytes = new byte[encryptedBytesWithSalt.Length - salt.Length - 8];
        Buffer.BlockCopy(encryptedBytesWithSalt, 8, salt, 0, salt.Length);
        Buffer.BlockCopy(encryptedBytesWithSalt, salt.Length + 8, encryptedBytes, 0, encryptedBytes.Length);
        //get key and iv
        byte[] key, iv;
        DeriveKeyAndIV(passphrase, salt, out key, out iv);
        return DecryptStringFromBytesAes(encryptedBytes, key, iv);
    }

    private static void DeriveKeyAndIV(string passphrase, byte[] salt, out byte[] key, out byte[] iv)
    {
        //generate key and iv
        List<byte> concatenatedHashes = new List<byte>(48);

        byte[] password = Encoding.UTF8.GetBytes(passphrase);
        byte[] currentHash = new byte[0];
        MD5 md5 = MD5.Create();
        bool enoughBytesForKey = false;
        //See http://www.openssl.org/docs/crypto/EVP_BytesToKey.html#KEY_DERIVATION_ALGORITHM
        while (!enoughBytesForKey)
        {
            int preHashLength = currentHash.Length + password.Length + salt.Length;
            byte[] preHash = new byte[preHashLength];

            Buffer.BlockCopy(currentHash, 0, preHash, 0, currentHash.Length);
            Buffer.BlockCopy(password, 0, preHash, currentHash.Length, password.Length);
            Buffer.BlockCopy(salt, 0, preHash, currentHash.Length + password.Length, salt.Length);

            currentHash = md5.ComputeHash(preHash);
            concatenatedHashes.AddRange(currentHash);

            if (concatenatedHashes.Count >= 48)
                enoughBytesForKey = true;
        }

        key = new byte[32];
        iv = new byte[16];
        concatenatedHashes.CopyTo(0, key, 0, 32);
        concatenatedHashes.CopyTo(32, iv, 0, 16);

        md5.Clear();
    }

    static string DecryptStringFromBytesAes(byte[] cipherText, byte[] key, byte[] iv)
    {
        //Check arguments.
        if (cipherText == null || cipherText.Length <= 0)
            throw new ArgumentNullException("cipherText");
        if (key == null || key.Length <= 0)
            throw new ArgumentNullException("key");
        if (iv == null || iv.Length <= 0)
            throw new ArgumentNullException("iv");

        //Declare the RijndaelManaged object
        //used to decrypt the data.
        RijndaelManaged aesAlg = null;

        //Declare the string used to hold
        //the decrypted text.
        string plaintext;

        //Create a RijndaelManaged object
        //with the specified key and IV.
        aesAlg = new RijndaelManaged { Mode = CipherMode.CBC, Padding = PaddingMode.None, KeySize = 256, BlockSize = 128, Key = key, IV = iv };

        //Create a decrytor to perform the stream transform.
        ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
        //Create the streams used for decryption.
        using (MemoryStream msDecrypt = new MemoryStream(cipherText))
        {
            using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
            {
                using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                {
                    //Read the decrypted bytes from the decrypting stream
                    //and place them in a string.
                    plaintext = srDecrypt.ReadToEnd();
                    srDecrypt.Close();
                }
            }
        }

        return plaintext;
    }
}