public static byte[] Decrypt(SecureString privateKey, byte[] data)
{
if (privateKey == null)
{
throw new ArgumentNullException(nameof(privateKey));
}
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
var rsaOnly = data[data.Length - 1] == 0;
if (rsaOnly)
{
byte[] d = new byte[data.Length - 1];
Array.Copy(data, 0, d, 0, d.Length);
return(Rsa.Decrypt(privateKey, d));
}
else
{
byte[] keyLength = new byte[4];
Array.Copy(data, data.Length - 5, keyLength, 0, 4);
byte[] k = new byte[keyLength.ToInteger()];
byte[] d = new byte[data.Length - k.Length - 5];
Array.Copy(data, k, k.Length);
Array.Copy(data, k.Length, d, 0, d.Length);
var key = Rsa.Decrypt(privateKey, k);
byte[] decryptedData = Aes.Decrypt(key.ToSecureString(), d);
return(decryptedData);
}
}
/// <summary> /// Descrypts encrypted data /// </summary> /// <param name="password">The password used to decrypt data</param> /// <param name="data">The data to decrypt</param> /// <returns>The decrypted data</returns> /// <exception cref="ArgumentNullException"><paramref name="password"/> is null</exception> /// <exception cref="ArgumentNullException"><paramref name="data"/> is null</exception> public static byte[] Decrypt(SecureString password, byte[] data) => Aes.Decrypt(password, KeyMaterial.DefaultIterations, data);