/// <summary> /// /// </summary> /// <param name="httpPacket"></param> /// <param name="tcpPacket"></param> /// <param name="sourceHost"></param> /// <param name="destinationHost"></param> /// <param name="mainPacketHandler"></param> /// <returns>True if the data was successfully parsed. False if the data need to be parsed again with more data</returns> private bool ExtractHttpData(Packets.HttpPacket httpPacket, Packets.TcpPacket tcpPacket, NetworkHost sourceHost, NetworkHost destinationHost, PacketHandler mainPacketHandler) { if (httpPacket.MessageTypeIsRequest) { //HTTP request System.Collections.Specialized.NameValueCollection cookieParams = null; if (httpPacket.UserAgentBanner != null && httpPacket.UserAgentBanner.Length > 0) { sourceHost.AddHttpUserAgentBanner(httpPacket.UserAgentBanner); } if (httpPacket.RequestedHost != null && httpPacket.RequestedHost.Length > 0) { destinationHost.AddHostName(httpPacket.RequestedHost); } if (httpPacket.Cookie != null) { cookieParams = new System.Collections.Specialized.NameValueCollection(); char[] separators = { ';', ',' }; foreach (string s in httpPacket.Cookie.Split(separators)) { string cookieFragment = s.Trim(); int splitOffset = cookieFragment.IndexOf('='); if (splitOffset > 0) { cookieParams.Add(cookieFragment.Substring(0, splitOffset), cookieFragment.Substring(splitOffset + 1)); } else { cookieParams.Add(cookieFragment, ""); } } NetworkCredential inCookieCredential = NetworkCredential.GetNetworkCredential(cookieParams, sourceHost, destinationHost, "HTTP Cookie parameter", httpPacket.ParentFrame.Timestamp); if (inCookieCredential != null) { mainPacketHandler.AddCredential(inCookieCredential); } mainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(tcpPacket.ParentFrame.FrameNumber, sourceHost, destinationHost, "TCP " + tcpPacket.SourcePort, "TCP " + tcpPacket.DestinationPort, cookieParams, httpPacket.ParentFrame.Timestamp, "HTTP Cookie")); NetworkCredential credential = new NetworkCredential(sourceHost, destinationHost, "HTTP Cookie", httpPacket.Cookie, "N/A", httpPacket.ParentFrame.Timestamp); mainPacketHandler.AddCredential(credential); } if (httpPacket.AuthorizationCredentialsUsername != null) { NetworkCredential nc = new NetworkCredential(sourceHost, destinationHost, httpPacket.PacketTypeDescription, httpPacket.AuthorizationCredentialsUsername, httpPacket.AuthorizationCredentialsPassword, httpPacket.ParentFrame.Timestamp); mainPacketHandler.AddCredential(nc); //this.AddCredential(nc); } if (httpPacket.HeaderFields != null && httpPacket.HeaderFields.Count > 0) { SortedList <string, string> ignoredHeaderNames = new SortedList <string, string>(); ignoredHeaderNames.Add("accept", null); ignoredHeaderNames.Add("connection", null); ignoredHeaderNames.Add("accept-language", null); ignoredHeaderNames.Add("accept-encoding", null); //Build a sortedList of all headers System.Collections.Specialized.NameValueCollection httpHeaders = new System.Collections.Specialized.NameValueCollection(); //SortedList<string, string> httpHeaders = new SortedList<string, string>(); foreach (string header in httpPacket.HeaderFields) { int delimiterIndex = header.IndexOf(':'); if (delimiterIndex > 0 && delimiterIndex < header.Length) { string headerName = header.Substring(0, delimiterIndex).Trim(); //if (!httpHeaders.ContainsKey(headerName)) if (!ignoredHeaderNames.ContainsKey(headerName.ToLower())) { httpHeaders.Add(headerName, header.Substring(delimiterIndex + 1).Trim()); } } } //mainPacketHandler.OnParametersDetected base.MainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(httpPacket.ParentFrame.FrameNumber, sourceHost, destinationHost, "TCP " + tcpPacket.SourcePort, "TCP " + tcpPacket.DestinationPort, httpHeaders, httpPacket.ParentFrame.Timestamp, "HTTP Header")); foreach (string headerName in httpHeaders.Keys) { /** * http://mobiforge.com/developing/blog/useful-x-headers * http://nakedsecurity.sophos.com/2012/01/25/smartphone-website-telephone-number/ * http://www.nowsms.com/discus/messages/485/14998.html * http://coding-talk.com/f46/check-isdn-10962/ **/ if (headerName.StartsWith("X-", StringComparison.InvariantCultureIgnoreCase)) { sourceHost.AddNumberedExtraDetail("HTTP header: " + headerName, httpHeaders[headerName]); } else if (headerName.StartsWith("HTTP_X", StringComparison.InvariantCultureIgnoreCase)) { sourceHost.AddNumberedExtraDetail("HTTP header: " + headerName, httpHeaders[headerName]); } else if (headerName.StartsWith("X_", StringComparison.InvariantCultureIgnoreCase)) { sourceHost.AddNumberedExtraDetail("HTTP header: " + headerName, httpHeaders[headerName]); } else if (headerName.StartsWith("HTTP_MSISDN", StringComparison.InvariantCultureIgnoreCase)) { sourceHost.AddNumberedExtraDetail("HTTP header: " + headerName, httpHeaders[headerName]); } } } //file transfer if ((httpPacket.RequestMethod == Packets.HttpPacket.RequestMethods.GET || httpPacket.RequestMethod == Packets.HttpPacket.RequestMethods.POST) && httpPacket.RequestedFileName != null) { System.Collections.Specialized.NameValueCollection queryStringData = httpPacket.GetQuerystringData(); if (queryStringData != null && queryStringData.Count > 0) { //parentForm.ShowParameters(tcpPacket.ParentFrame.FrameNumber, sourceHost, destinationHost, "TCP "+tcpPacket.SourcePort, "TCP "+tcpPacket.DestinationPort, queryStringData, tcpPacket.ParentFrame.Timestamp, "HTTP QueryString"); mainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(tcpPacket.ParentFrame.FrameNumber, sourceHost, destinationHost, "TCP " + tcpPacket.SourcePort, "TCP " + tcpPacket.DestinationPort, queryStringData, tcpPacket.ParentFrame.Timestamp, "HTTP QueryString")); //mainPacketHandler.AddCredential(new NetworkCredential(sourceHost, destinationHost, "HTTP GET QueryString", NetworkCredential credential = NetworkCredential.GetNetworkCredential(queryStringData, sourceHost, destinationHost, "HTTP GET QueryString", tcpPacket.ParentFrame.Timestamp); if (credential != null) { mainPacketHandler.AddCredential(credential); } if (queryStringData.HasKeys()) { Dictionary <string, string> queryStringDictionary = new Dictionary <string, string>(); foreach (string key in queryStringData.AllKeys) { queryStringDictionary.Add(key, queryStringData[key]); } if (queryStringDictionary.ContainsKey("utmsr")) { sourceHost.AddNumberedExtraDetail("Screen resolution (Google Analytics)", queryStringDictionary["utmsr"]); } if (queryStringDictionary.ContainsKey("utmsc")) { sourceHost.AddNumberedExtraDetail("Color depth (Google Analytics)", queryStringDictionary["utmsc"]); } if (queryStringDictionary.ContainsKey("utmul")) { sourceHost.AddNumberedExtraDetail("Browser language (Google Analytics)", queryStringDictionary["utmul"]); } if (queryStringDictionary.ContainsKey("utmfl")) { sourceHost.AddNumberedExtraDetail("Flash version (Google Analytics)", queryStringDictionary["utmfl"]); } if (httpPacket.RequestMethod == Packets.HttpPacket.RequestMethods.POST && queryStringDictionary.ContainsKey("a") && queryStringDictionary["a"].Equals("SendMessage")) { if (!httpPacket.ContentIsComplete())//we must have all the content when parsing AOL data { return(false); } } } } //file transfer stuff string fileUri = httpPacket.RequestedFileName; string queryString = null; if (fileUri.Contains("?")) { if (fileUri.IndexOf('?') + 1 < fileUri.Length) { queryString = fileUri.Substring(fileUri.IndexOf('?') + 1); } fileUri = fileUri.Substring(0, fileUri.IndexOf('?')); } if (fileUri.StartsWith("http://")) { fileUri = fileUri.Substring(7); } if (fileUri.StartsWith("www.") && fileUri.Contains("/")) { fileUri = fileUri.Substring(fileUri.IndexOf("/")); } //char[] separators={ '/' }; char[] separators = new char[System.IO.Path.GetInvalidPathChars().Length + 1]; Array.Copy(System.IO.Path.GetInvalidPathChars(), separators, System.IO.Path.GetInvalidPathChars().Length); separators[separators.Length - 1] = '/'; string[] uriParts = fileUri.Split(separators); string filename; string fileLocation = ""; if (fileUri.EndsWith("/")) { filename = "index.html"; for (int i = 0; i < uriParts.Length; i++) { if (uriParts[i].Length > 0 && !uriParts[i].Contains("..")) { fileLocation += "/" + uriParts[i]; } } } else { filename = uriParts[uriParts.Length - 1]; for (int i = 0; i < uriParts.Length - 1; i++) { if (uriParts[i].Length > 0 && !uriParts[i].Contains("..")) { fileLocation += "/" + uriParts[i]; } } } //make sure all queryString-depending dynamic webpages are shown individually if (queryString != null && queryString.Length > 0) { filename += "." + queryString.GetHashCode().ToString("X4"); } //I will have to switch source and destination host here since this is only the request, not the actual file transfer! try { //see if there is an old assembler that needs to be removed if (mainPacketHandler.FileStreamAssemblerList.ContainsAssembler(destinationHost, tcpPacket.DestinationPort, sourceHost, tcpPacket.SourcePort, true)) { FileTransfer.FileStreamAssembler oldAssembler = mainPacketHandler.FileStreamAssemblerList.GetAssembler(destinationHost, tcpPacket.DestinationPort, sourceHost, tcpPacket.SourcePort, true); mainPacketHandler.FileStreamAssemblerList.Remove(oldAssembler, true); } string fileDetails = httpPacket.RequestedFileName; if (httpPacket.RequestedHost != null && httpPacket.RequestedHost.Length > 0 && httpPacket.RequestedFileName != null && httpPacket.RequestedFileName.StartsWith("/")) { fileDetails = httpPacket.RequestedHost + httpPacket.RequestedFileName; } FileTransfer.FileStreamAssembler assembler = new FileTransfer.FileStreamAssembler(mainPacketHandler.FileStreamAssemblerList, destinationHost, tcpPacket.DestinationPort, sourceHost, tcpPacket.SourcePort, tcpPacket != null, FileTransfer.FileStreamTypes.HttpGetNormal, filename, fileLocation, fileDetails, httpPacket.ParentFrame.FrameNumber, httpPacket.ParentFrame.Timestamp); //FileTransfer.FileStreamAssembler assembler=new FileTransfer.FileStreamAssembler(mainPacketHandler.FileStreamAssemblerList, destinationHost, tcpPacket.DestinationPort, sourceHost, tcpPacket.SourcePort, tcpPacket!=null, FileTransfer.FileStreamTypes.HttpGetNormal, filename, fileLocation, httpPacket.RequestedFileName, httpPacket.ParentFrame.FrameNumber, httpPacket.ParentFrame.Timestamp); mainPacketHandler.FileStreamAssemblerList.Add(assembler); } catch (Exception e) { mainPacketHandler.OnAnomalyDetected("Error creating assembler for HTTP file transfer: " + e.Message); } //Large HTTP POSTs should also be dumped to files //if(httpPacket.RequestMethod==Packets.HttpPacket.RequestMethods.POST && !httpPacket.ContentIsComplete() && httpPacket.ContentLength>4096 && httpPacket.ContentType.StartsWith("multipart/form-data")) { if (httpPacket.RequestMethod == Packets.HttpPacket.RequestMethods.POST) { //All Multipart MIME HTTP POSTs should be dumped to file //the fileAssembler extracts the form parameters after assembly if (httpPacket.ContentType != null && httpPacket.ContentType.StartsWith("multipart/form-data")) { FileTransfer.FileStreamAssembler assembler = null; try { //see if there is an old assembler that needs to be removed if (mainPacketHandler.FileStreamAssemblerList.ContainsAssembler(sourceHost, tcpPacket.SourcePort, destinationHost, tcpPacket.DestinationPort, true)) { FileTransfer.FileStreamAssembler oldAssembler = mainPacketHandler.FileStreamAssemblerList.GetAssembler(sourceHost, tcpPacket.SourcePort, destinationHost, tcpPacket.DestinationPort, true); mainPacketHandler.FileStreamAssemblerList.Remove(oldAssembler, true); } string mimeBoundary; if (httpPacket.ContentType.ToLower(System.Globalization.CultureInfo.InvariantCulture).StartsWith("multipart/form-data; boundary=") && httpPacket.ContentType.Length > 30) { mimeBoundary = httpPacket.ContentType.Substring(30); } else { mimeBoundary = ""; } assembler = new FileTransfer.FileStreamAssembler(mainPacketHandler.FileStreamAssemblerList, sourceHost, tcpPacket.SourcePort, destinationHost, tcpPacket.DestinationPort, tcpPacket != null, FileTransfer.FileStreamTypes.HttpPostMimeMultipartFormData, filename + ".form-data.mime", fileLocation, mimeBoundary, httpPacket.ParentFrame.FrameNumber, httpPacket.ParentFrame.Timestamp); assembler.FileContentLength = httpPacket.ContentLength; assembler.FileSegmentRemainingBytes = httpPacket.ContentLength; mainPacketHandler.FileStreamAssemblerList.Add(assembler); if (assembler.TryActivate()) { //assembler is now active if (httpPacket.MessageBody != null && httpPacket.MessageBody.Length > 0) { assembler.AddData(httpPacket.MessageBody, tcpPacket.SequenceNumber); } } } catch (Exception e) { if (assembler != null) { assembler.Clear(); } mainPacketHandler.OnAnomalyDetected("Error creating assembler for HTTP file transfer: " + e.Message); } } else //form data (not multipart) { System.Collections.Generic.List <Mime.MultipartPart> formMultipartData = httpPacket.GetFormData(); if (formMultipartData != null) { foreach (Mime.MultipartPart mimeMultipart in formMultipartData) { if (mimeMultipart.Attributes["requests"] != null && httpPacket.GetQuerystringData() != null && httpPacket.GetQuerystringData()["a"] == "SendMessage") { //To handle AOL webmail string encodedMessage = mimeMultipart.Attributes["requests"]; if (encodedMessage.StartsWith("[{") && encodedMessage.EndsWith("}]")) { encodedMessage = encodedMessage.Substring(2, encodedMessage.Length - 4); } int startIndex = -1; int endIndex = -1; while (endIndex < encodedMessage.Length - 2) { //startIndex = endIndex + 1; if (endIndex > 0) { startIndex = encodedMessage.IndexOf(',', endIndex) + 1; } else { startIndex = 0; } bool escapedString = encodedMessage[startIndex] == '\"'; if (escapedString) { startIndex = encodedMessage.IndexOf('\"', startIndex) + 1; endIndex = encodedMessage.IndexOf('\"', startIndex); while (encodedMessage[endIndex - 1] == '\\') { endIndex = encodedMessage.IndexOf('\"', endIndex + 1); } } else { endIndex = encodedMessage.IndexOf(':', startIndex); } string attributeName = encodedMessage.Substring(startIndex, endIndex - startIndex); #if DEBUG //System.Diagnostics.Debug.Assert(encodedMessage[endIndex + 1] == ':'); if (encodedMessage[endIndex] != ':' && encodedMessage[endIndex + 1] != ':') { System.Diagnostics.Debugger.Break(); } #endif startIndex = encodedMessage.IndexOf(':', endIndex) + 1; escapedString = encodedMessage[startIndex] == '\"'; if (escapedString) { startIndex = encodedMessage.IndexOf('\"', startIndex) + 1; endIndex = encodedMessage.IndexOf('\"', startIndex); while (encodedMessage[endIndex - 1] == '\\') { endIndex = encodedMessage.IndexOf('\"', endIndex + 1); } } else if (encodedMessage.IndexOf(',', startIndex) > 0) { endIndex = encodedMessage.IndexOf(',', startIndex); } else { endIndex = encodedMessage.Length; } string attributeValue = encodedMessage.Substring(startIndex, endIndex - startIndex); //replace some special characters encodedMessage = encodedMessage.Replace("\\n", System.Environment.NewLine).Replace("\\r", "\r").Replace("\\t", "\t"); mimeMultipart.Attributes.Add(attributeName, attributeValue); } //END OF AOL WEBMAIL CODE } } this.MainPacketHandler.ExtractMultipartFormData(formMultipartData, sourceHost, destinationHost, tcpPacket.ParentFrame.Timestamp, httpPacket.ParentFrame.FrameNumber, "TCP " + tcpPacket.SourcePort, "TCP " + tcpPacket.DestinationPort, ApplicationLayerProtocol.Http, cookieParams); } } } } } else //reply { if (httpPacket.ServerBanner != null && httpPacket.ServerBanner.Length > 0) { sourceHost.AddHttpServerBanner(httpPacket.ServerBanner, tcpPacket.SourcePort); } if (httpPacket.WwwAuthenticateRealm != null && httpPacket.WwwAuthenticateRealm.Length > 0) { sourceHost.AddHostName(httpPacket.WwwAuthenticateRealm); sourceHost.ExtraDetailsList["WWW-Authenticate realm"] = httpPacket.WwwAuthenticateRealm; } if (mainPacketHandler.FileStreamAssemblerList.ContainsAssembler(sourceHost, tcpPacket.SourcePort, destinationHost, tcpPacket.DestinationPort, true)) { FileTransfer.FileStreamAssembler assembler = mainPacketHandler.FileStreamAssemblerList.GetAssembler(sourceHost, tcpPacket.SourcePort, destinationHost, tcpPacket.DestinationPort, true); //http://www.mail-archive.com/[email protected]/msg08695.html //There could also be no content-length when http-keepalives are not used. //In that case, the client just collects all data till the TCP-FIN. //-1 is set instead of null if Content-Length is not defined if (httpPacket.ContentLength >= 0 || httpPacket.ContentLength == -1) { assembler.FileContentLength = httpPacket.ContentLength; assembler.FileSegmentRemainingBytes = httpPacket.ContentLength;//we get the whole file in one segment (one serie of TCP packets) } if (httpPacket.ContentLength == 0) { mainPacketHandler.FileStreamAssemblerList.Remove(assembler, true); } else { if (httpPacket.ContentDispositionFilename != null) { assembler.Filename = httpPacket.ContentDispositionFilename; } //append content type extention to file name if (httpPacket.ContentType != null && httpPacket.ContentType.Contains("/") && httpPacket.ContentType.IndexOf('/') < httpPacket.ContentType.Length - 1) { string extension = Utils.StringManglerUtil.GetExtension(httpPacket.ContentType); /* * string extension=httpPacket.ContentType.Substring(httpPacket.ContentType.IndexOf('/')+1); * if(extension.Contains(";")) * extension=extension.Substring(0, extension.IndexOf(";")); * */ if (extension.Length > 0 && !assembler.Filename.EndsWith("." + extension, StringComparison.InvariantCultureIgnoreCase) && !(assembler.Filename.EndsWith("jpg", StringComparison.InvariantCultureIgnoreCase) && extension.Equals("jpeg", StringComparison.InvariantCultureIgnoreCase)) && !(assembler.Filename.EndsWith("htm", StringComparison.InvariantCultureIgnoreCase) && extension.Equals("html", StringComparison.InvariantCultureIgnoreCase))) { //append the content type as extension assembler.Filename = assembler.Filename + "." + extension; } } if (httpPacket.TransferEncoding == "chunked") { assembler.FileStreamType = FileTransfer.FileStreamTypes.HttpGetChunked; } if (httpPacket.ContentEncoding != null && httpPacket.ContentEncoding.Length > 0) { if (httpPacket.ContentEncoding.Equals("gzip"))//I'll only care aboute gzip for now { assembler.ContentEncoding = Packets.HttpPacket.ContentEncodings.Gzip; } else if (httpPacket.ContentEncoding.Equals("deflate"))//http://tools.ietf.org/html/rfc1950 { assembler.ContentEncoding = Packets.HttpPacket.ContentEncodings.Deflate; } } if (assembler.TryActivate()) { //the assembler is now ready to receive data if (httpPacket.MessageBody != null && httpPacket.MessageBody.Length > 0) { if (assembler.FileStreamType == FileTransfer.FileStreamTypes.HttpGetChunked || httpPacket.MessageBody.Length <= assembler.FileSegmentRemainingBytes || assembler.FileSegmentRemainingBytes == -1) { assembler.AddData(httpPacket.MessageBody, tcpPacket.SequenceNumber); } } } } //} //else { // mainPacketHandler.FileStreamAssemblerList.Remove(assembler, true); //} } } return(true); }