public byte[] Decrypt(EncryptedData encryptedData)
{
if (!(encryptedData.Iv[0] == 1
&& encryptedData.Iv[1] == 2
&& encryptedData.Iv[2] == 3))
{
throw new ArgumentException($"Don't know about fancy salts that do not contain the bytes 1, 2, and 3");
}
return encryptedData.Bytes;
}
/// <summary>
/// Decrypts the given <see cref="EncryptedData"/> using the configured key.
/// </summary>
public byte[] Decrypt(EncryptedData encryptedData)
{
var iv = encryptedData.Iv;
var bytes = encryptedData.Bytes;
using (var rijndael = new RijndaelManaged())
{
rijndael.IV = iv;
rijndael.Key = _key;
using (var decryptor = rijndael.CreateDecryptor())
using (var destination = new MemoryStream())
using(var cryptoStream = new CryptoStream(destination, decryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.FlushFinalBlock();
return destination.ToArray();
}
}
}
