protected override void EncryptRecord(DisposeContext d, IBufferOffsetSize input)
{
ICryptoTransform cipher;
if (!Cipher.HasFixedIV)
{
EncryptionAlgorithm.GenerateIV();
cipher = d.Add(EncryptionAlgorithm.CreateEncryptor());
}
else
{
cipher = encryptionCipher;
}
if (!Cipher.HasFixedIV)
{
Buffer.BlockCopy(EncryptionAlgorithm.IV, 0, input.Buffer, input.Offset, BlockSize);
}
var ret = cipher.TransformBlock(input.Buffer, input.Offset + HeaderSize, input.Size - HeaderSize, input.Buffer, input.Offset + HeaderSize);
if (ret <= 0 || ret != input.Size - HeaderSize)
{
throw new InvalidOperationException();
}
if (Cipher.HasFixedIV)
{
var IV = new byte [BlockSize];
Buffer.BlockCopy(input.Buffer, input.Offset + input.Size - BlockSize, IV, 0, BlockSize);
EncryptionAlgorithm.IV = IV;
}
}
protected override void EncryptRecord(DisposeContext d, IBufferOffsetSize buffer)
{
ICryptoTransform cipher;
if (!Cipher.HasFixedIV)
{
EncryptionAlgorithm.GenerateIV();
cipher = d.Add(EncryptionAlgorithm.CreateEncryptor());
}
else
{
cipher = encryptionCipher;
}
if (!Cipher.HasFixedIV)
{
Buffer.BlockCopy(EncryptionAlgorithm.IV, 0, buffer.Buffer, buffer.Offset, BlockSize);
}
cipher.TransformBlock(buffer.Buffer, buffer.Offset + HeaderSize, buffer.Size - HeaderSize, buffer.Buffer, buffer.Offset + HeaderSize);
}