public XmlParser(CryptoRandomStream crypto,
Stream stream, Dispatcher dispatcher)
{
if (crypto == null) throw new ArgumentNullException("crypto");
if (stream == null) throw new ArgumentNullException("stream");
if (dispatcher == null) throw new ArgumentNullException("dispatcher");
_crypto = crypto;
_stream = stream;
_dispatcher = dispatcher;
}
/// <summary>
/// Decrypts the protected fields.
/// </summary>
/// <param name="crypto">The crypto random stream.</param>
public void Decrypt(CryptoRandomStream crypto)
{
if (crypto == null)
throw new ArgumentNullException("crypto");
var values = GetProtectedValues();
foreach (var item in values)
{
item.Value = crypto
.Decrypt(item.Value);
}
}
/// <summary>
/// Encrypts the specified value.
/// </summary>
/// <param name="crypto">The crypto stream.</param>
/// <param name="value">The value.</param>
/// <returns>Encrypted value.</returns>
public static string Encrypt(
this CryptoRandomStream crypto, string value)
{
if (string.IsNullOrEmpty(value))
{
return(value);
}
var bytes = Encoding.UTF8.GetBytes(value);
var pad = crypto.GetRandomBytes(
(uint)bytes.Length);
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] ^= pad[i];
}
return(Convert.ToBase64String(
bytes, 0, bytes.Length));
}
/// <summary>
/// Descrypts the specified value.
/// </summary>
/// <param name="crypto">The crypto stream.</param>
/// <param name="value">The value.</param>
/// <returns>Decrypted value.</returns>
public static string Decrypt(
this CryptoRandomStream crypto, string value)
{
if (string.IsNullOrEmpty(value))
{
return(value);
}
var encrypted = Convert
.FromBase64String(value);
var pad = crypto.GetRandomBytes(
(uint)encrypted.Length);
for (var i = 0; i < encrypted.Length; i++)
{
encrypted[i] ^= pad[i];
}
return(Encoding.UTF8.GetString(
encrypted, 0, encrypted.Length));
}
