/// <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>
public bool ExtractHttpData(Packets.HttpPacket httpPacket, Packets.TcpPacket tcpPacket, FiveTuple fiveTuple, bool transferIsClientToServer, PacketHandler mainPacketHandler)
{
NetworkHost sourceHost, destinationHost;
if (transferIsClientToServer)
{
sourceHost = fiveTuple.ClientHost;
destinationHost = fiveTuple.ServerHost;
}
else
{
sourceHost = fiveTuple.ServerHost;
destinationHost = fiveTuple.ClientHost;
}
//A HTTP cookie can be set by both client and server
System.Collections.Specialized.NameValueCollection cookieParams = null;
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, "");
}
}
NetworkHost client, server;
if (httpPacket.MessageTypeIsRequest)
{
client = sourceHost;
server = destinationHost;
}
else
{
client = destinationHost;
server = sourceHost;
}
NetworkCredential inCookieCredential = NetworkCredential.GetNetworkCredential(cookieParams, client, server, "HTTP Cookie parameter", httpPacket.ParentFrame.Timestamp);
if (inCookieCredential != null)
{
mainPacketHandler.AddCredential(inCookieCredential);
}
mainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(tcpPacket.ParentFrame.FrameNumber, fiveTuple, transferIsClientToServer, cookieParams, httpPacket.ParentFrame.Timestamp, "HTTP Cookie"));
NetworkCredential credential = new NetworkCredential(client, server, "HTTP Cookie", httpPacket.Cookie, "N/A", httpPacket.ParentFrame.Timestamp);
mainPacketHandler.AddCredential(credential);
}
if (httpPacket.MessageTypeIsRequest)
{
//HTTP request
{
System.Collections.Specialized.NameValueCollection httpRequestNvc = new System.Collections.Specialized.NameValueCollection();
httpRequestNvc.Add(httpPacket.RequestMethod.ToString(), httpPacket.RequestedFileName);
base.MainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(httpPacket.ParentFrame.FrameNumber, fiveTuple, transferIsClientToServer, httpRequestNvc, httpPacket.ParentFrame.Timestamp, "HTTP Request"));
}
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.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);
System.Collections.Specialized.NameValueCollection httpHeaders = HttpPacketHandler.ParseHeaders(httpPacket, ignoredHeaderNames);
//mainPacketHandler.OnParametersDetected
base.MainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(httpPacket.ParentFrame.FrameNumber, fiveTuple, transferIsClientToServer, 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, fiveTuple, transferIsClientToServer, 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 && !this.ExtensionMimeTypeCombosMatches(filename))
{
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 {
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, fiveTuple, !transferIsClientToServer, FileTransfer.FileStreamTypes.HttpGetNormal, filename, fileLocation, fileDetails, httpPacket.ParentFrame.FrameNumber, httpPacket.ParentFrame.Timestamp, httpPacket.RequestedHost);
//mainPacketHandler.FileStreamAssemblerList.Add(assembler);
mainPacketHandler.FileStreamAssemblerList.AddOrEnqueue(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", StringComparison.InvariantCultureIgnoreCase))
{
FileTransfer.FileStreamAssembler assembler = null;
try {
//see if there is an old assembler that needs to be removed
if (mainPacketHandler.FileStreamAssemblerList.ContainsAssembler(fiveTuple, transferIsClientToServer))
{
FileTransfer.FileStreamAssembler oldAssembler = mainPacketHandler.FileStreamAssemblerList.GetAssembler(fiveTuple, transferIsClientToServer);
if (oldAssembler.IsActive && oldAssembler.AssembledByteCount > 0)
{
//I'll assume that the file transfer was OK
assembler.FinishAssembling();
}
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
{
int multipartIndex = httpPacket.ContentType.IndexOf("multipart/form-data", StringComparison.InvariantCultureIgnoreCase);
if (multipartIndex >= 0)
{
int boundaryIndex = httpPacket.ContentType.IndexOf("boundary=", multipartIndex, StringComparison.InvariantCultureIgnoreCase);
if (boundaryIndex > 0)
{
mimeBoundary = httpPacket.ContentType.Substring(boundaryIndex + 9);
}
}
}
assembler = new FileTransfer.FileStreamAssembler(mainPacketHandler.FileStreamAssemblerList, fiveTuple, transferIsClientToServer, 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);
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, fiveTuple, transferIsClientToServer, tcpPacket.ParentFrame.Timestamp, httpPacket.ParentFrame.FrameNumber, ApplicationLayerProtocol.Http, cookieParams);
}
}
}
}
}
else //reply
{
try
{
System.Collections.Specialized.NameValueCollection httpResponseNvc = new System.Collections.Specialized.NameValueCollection();
httpResponseNvc.Add("HTTP Response Status Code", httpPacket.StatusCode + " " + httpPacket.StatusMessage);
base.MainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(httpPacket.ParentFrame.FrameNumber, fiveTuple, transferIsClientToServer, httpResponseNvc, httpPacket.ParentFrame.Timestamp, "HTTP Response"));
System.Collections.Specialized.NameValueCollection httpHeaders = HttpPacketHandler.ParseHeaders(httpPacket);
base.MainPacketHandler.OnParametersDetected(new Events.ParametersEventArgs(httpPacket.ParentFrame.FrameNumber, fiveTuple, transferIsClientToServer, httpHeaders, httpPacket.ParentFrame.Timestamp, "HTTP Header"));
}
catch { };
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(fiveTuple, transferIsClientToServer))
{
FileTransfer.FileStreamAssembler assembler = mainPacketHandler.FileStreamAssemblerList.GetAssembler(fiveTuple, transferIsClientToServer);
//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.StatusCode != null && httpPacket.StatusCode.Trim().StartsWith("1"))
{
//just ignore this response, probably a "HTTP/1.1 100 Continue"
}
if (httpPacket.StatusCode != null && httpPacket.StatusCode.Trim().StartsWith("204"))
{
//HTTP/1.1 204 No Content
mainPacketHandler.FileStreamAssemblerList.Remove(assembler, true);
}
else if (httpPacket.StatusCode != null && !httpPacket.StatusCode.Trim().StartsWith("2") && httpPacket.ContentLength <= 0 && httpPacket.TransferEncoding == null)
{
mainPacketHandler.FileStreamAssemblerList.Remove(assembler, true);
}
else
{
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.ContentRange != null)
{
assembler.ContentRange = httpPacket.ContentRange;
/*
* if (httpPacket.ContentRange.Total > httpPacket.ContentRange.End + 1)
* assembler.Filename = "part-" + httpPacket.ContentRange.Start.ToString() + "-" + assembler.Filename;
*/
}
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 mimeExtension = Utils.StringManglerUtil.GetExtension(httpPacket.ContentType);
/*
* string extension=httpPacket.ContentType.Substring(httpPacket.ContentType.IndexOf('/')+1);
* if(extension.Contains(";"))
* extension=extension.Substring(0, extension.IndexOf(";"));
* */
if (mimeExtension.Length > 0 && !assembler.Filename.EndsWith("." + mimeExtension, StringComparison.InvariantCultureIgnoreCase))
{
//string assemblerExtension = Utils.StringManglerUtil.GetExtension(assembler.Filename);
if (this.ExtensionMimeTypeCombosMatches(assembler.Filename, mimeExtension))
{
mimeExtension = null;
}
/*
* foreach (KeyValuePair<string, string> extMime in this.extensionMimeTypeCombos) {
* if (assembler.Filename.EndsWith(extMime.Key, StringComparison.InvariantCultureIgnoreCase) && extMime.Value.Equals(mimeExtension, StringComparison.InvariantCultureIgnoreCase)) {
* mimeExtension = null;
* break;
* }
* }
*/
if (mimeExtension != null) //append the content type as extension
{
if (this.extensionReplacements.ContainsKey(mimeExtension))
{
assembler.Filename = assembler.Filename + "." + this.extensionReplacements[mimeExtension];
}
else
{
assembler.Filename = assembler.Filename + "." + mimeExtension;
}
}
}
}
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);
}
}
}
}
}
}
}
return(true);
}