/// <summary>
/// When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.
/// </summary>
/// <param name="buffer">An array of bytes. This method copies <paramref name="count"/> bytes from <paramref name="buffer"/> to the current stream.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer"/> at which to begin copying bytes to the current stream.</param>
/// <param name="count">The number of bytes to be written to the current stream.</param>
/// <exception cref="T:System.ArgumentException">The sum of <paramref name="offset"/> and <paramref name="count"/> is greater than the buffer length. </exception>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="buffer"/> is null. </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// <paramref name="offset"/> or <paramref name="count"/> is negative. </exception>
/// <exception cref="T:System.IO.IOException">An I/O error occurs. </exception>
/// <exception cref="T:System.NotSupportedException">The stream does not support writing. </exception>
/// <exception cref="T:System.ObjectDisposedException">Methods were called after the stream was closed. </exception>
public override void Write(byte[] buffer, int offset, int count)
{
if (!_init)
{
if (!CipherTextOnly)
{
if (_encrypt)
{
_output.Write(_iv, 0, _iv.Length);
}
else
{
Array.Copy(buffer, 0, _iv, 0, _iv.Length);
offset = offset + _iv.Length;
count = count - _iv.Length;
}
}
_initFunc(_iv, _cipher, _encrypt);
_init = true;
}
var outBuffer = new byte[_cipher.GetUpdateOutputSize(count)];
var outLen = _cipher.ProcessBytes(buffer, offset, count, outBuffer, 0);
_output.Write(outBuffer, 0, outLen);
outBuffer.Clear();
_outLen += outLen;
_inLen += count;
}
/// <summary>
/// When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.
/// </summary>
/// <param name="buffer">An array of bytes. This method copies <paramref name="count" /> bytes from <paramref name="buffer" /> to the current stream.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin copying bytes to the current stream.</param>
/// <param name="count">The number of bytes to be written to the current stream.</param>
/// <exception cref="InvalidCryptoDataException"></exception>
/// <exception cref="T:System.ArgumentException">The sum of <paramref name="offset" /> and <paramref name="count" /> is greater than the buffer length.</exception>
/// <exception cref="T:System.ArgumentNullException"><paramref name="buffer" /> is null.</exception>
/// <exception cref="T:System.ArgumentOutOfRangeException"><paramref name="offset" /> or <paramref name="count" /> is negative.</exception>
/// <exception cref="T:System.IO.IOException">An I/O error occurs.</exception>
/// <exception cref="T:System.NotSupportedException">The stream does not support writing.</exception>
/// <exception cref="T:System.ObjectDisposedException">Methods were called after the stream was closed.</exception>
public override void Write(byte[] buffer, int offset, int count)
{
try
{
Init();
var outBuffer = new byte[_cipher.GetUpdateOutputSize(count)];
var outLen = _cipher.ProcessBytes(buffer, offset, count, outBuffer, 0);
_output.Write(outBuffer, 0, outLen);
outBuffer.Clear();
_outLen += outLen;
_inLen += count;
}
catch (InvalidCipherTextException ex)
{
throw new InvalidCryptoDataException(ex.Message);
}
}
public int GetUpdateOutputSize(int inputLen)
{
return(cipher.GetUpdateOutputSize(inputLen));
}
public int GetUpdateOutputSize(int inputLen)
{
return(bufferedCipher.GetUpdateOutputSize(inputLen));
}
