Question

Following encryption and decryption algorithms are called via powershell and in a sharepoint application page:

    public static string Encrypt(string dataToEncrypt, string password, string salt)
    {
        AesManaged aes = null;
        MemoryStream memoryStream = null;
        CryptoStream cryptoStream = null;

        try
        {
            Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(password, Encoding.UTF8.GetBytes(salt), 10000);

            aes = new AesManaged();
            aes.Key = rfc2898.GetBytes(32);
            aes.IV = rfc2898.GetBytes(16);

            memoryStream = new MemoryStream();
            cryptoStream = new CryptoStream(memoryStream, aes.CreateEncryptor(), CryptoStreamMode.Write);

            byte[] data = Encoding.UTF8.GetBytes(dataToEncrypt);
            cryptoStream.Write(data, 0, data.Length);
            cryptoStream.FlushFinalBlock();

            return Convert.ToBase64String(memoryStream.ToArray());
        }
        finally
        {
            if (cryptoStream != null)
                cryptoStream.Close();

            if (memoryStream != null)
                memoryStream.Close();

            if (aes != null)
                aes.Clear();
        }
    }

Why the encrypted string changes? Is it about application domain?

Answer 1

The encrypted string differs because of the $ character. $ should be escaped while the function is called via powershell.