public int ForwardChunkedDataToPeerChunked(
MyBinaryReader inputStreamReader,
BinaryWriter outputStreamWriter,
Encoding contentCharsetEncoding,
byte[] serverNewlineBytes,
SniffedDataChunk sniffedDataChunk,
bool isProcessed) // <-- relevant for sslstrip and injectFile
{
int noBytesTransferred = 0;
int noEffectivelyTransferredBytes = 0;
int announcedChunkSize = 0;
int chunkCounter = 0;
string previousChunkLen = "00";
while (true)
{
chunkCounter += 1;
// Read chunk size
string chunkLenStr = inputStreamReader.ReadLine(false);
// Jump out of the loop if it is the last data packet
if (string.IsNullOrEmpty(chunkLenStr))
{
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.ForwardChunkedDataToPeer2(): WOOPS! chunkLenStr isNullOrEmpty!!!");
break;
}
announcedChunkSize = int.Parse(chunkLenStr, System.Globalization.NumberStyles.HexNumber);
// If announced chunk size is invalid/<0 jump out of the loop
if (announcedChunkSize < 0)
{
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.ForwardChunkedDataToPeer2(): WOOPS! Invalid chunk size!!!");
break;
}
// Receive announced data chunk from server
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.ForwardChunkedDataToPeer2(): ChunkNo={0}: previousChunkLen=0x{1} ChunkLength=0x{2}", chunkCounter, previousChunkLen, chunkLenStr);
noEffectivelyTransferredBytes = this.RelayChunk2(inputStreamReader, outputStreamWriter, announcedChunkSize, contentCharsetEncoding, serverNewlineBytes, isProcessed);
noBytesTransferred += noEffectivelyTransferredBytes;
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.ForwardChunkedDataToPeer2(): blockSize > 0: ChunkNo={0} chunkLenStr.Length={1}, Content=|0x{2}|", chunkCounter, chunkLenStr.Length, chunkLenStr);
previousChunkLen = chunkLenStr;
// If chunk size is zero jump out of the loop
if (announcedChunkSize == 0 || chunkLenStr == "0")
{
break;
}
}
return(noBytesTransferred);
}
private int RelayChunk2(MyBinaryReader inputStreamReader, BinaryWriter outputStreamWriter, int announcedChunkSize, Encoding contentCharsetEncoding, byte[] serverNewlineBytes, bool mustBeProcessed)
{
int totalBytesTransferred = 0;
// Read all bytes from server stream
byte[] binaryDataBlock = this.ReceiveChunk(announcedChunkSize, inputStreamReader);
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.RelayChunk2(): ChunkSize:{0}, binaryDataBlock.Length:{1}", announcedChunkSize, binaryDataBlock.Length);
if (announcedChunkSize != binaryDataBlock.Length)
{
throw new Exception("The announced content length and the amount of received data are not the same");
}
// Encode received bytes to the announced format
// string dataBlockString = contentCharsetEncoding.GetString(binaryDataBlock);
DataChunk serverDataChunk = new DataChunk(binaryDataBlock, binaryDataBlock.Length, contentCharsetEncoding);
// If response can be processed : do so.
if (mustBeProcessed == true)
{
Lib.PluginCalls.ServerDataTransfer(this.requestObj, serverDataChunk);
}
// Send chunk size to recepient
string chunkSizeHexStringTmp = serverDataChunk.ContentDataLength.ToString("x");
byte[] chunkSizeDeclaration = contentCharsetEncoding.GetBytes(chunkSizeHexStringTmp);
outputStreamWriter.Write(chunkSizeDeclaration, 0, chunkSizeDeclaration.Length);
outputStreamWriter.Write(serverNewlineBytes, 0, serverNewlineBytes.Length);
// Send data packet to recipient
outputStreamWriter.Write(serverDataChunk.ContentData, 0, serverDataChunk.ContentDataLength);
// Send trailing newline to finish chunk transmission
inputStreamReader.ReadLine();
outputStreamWriter.Write(serverNewlineBytes, 0, serverNewlineBytes.Length);
outputStreamWriter.Flush();
Logging.Instance.LogMessage(this.requestObj.Id, this.requestObj.ProxyProtocol, Loglevel.Debug, "TcpClientRaw.RelayChunk2(): Transferred {0}/{1} bytes from SERVER -> CLIENT: ", announcedChunkSize, serverDataChunk.ContentDataLength);
return(totalBytesTransferred);
}