///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
internal int OnRequest(byte[] receiveBuffer, int bytesReceived, bool internalRequest)
{
string proxyRequest = wwwProxy_.defaultEncoding_.GetString(receiveBuffer, 0, bytesReceived);
int processedRequestBytes = 0;
wwwProxy_.log_.Write("Inbound.OnRequest()", proxyRequest);
Match httpMatch = Regex.Match(proxyRequest, "^([A-Z]+)\\s+(\\S*)?\\s+HTTP/\\d.\\d\r$", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (httpMatch.Success)
{
string defaultCharset = "iso-8859-1";
string charset = defaultCharset;
string httpVerb = httpMatch.Groups[1].Value;
if (httpVerb != "CONNECT")
{
Match getEndMatch = Regex.Match(proxyRequest, "\r\n\r\n", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (getEndMatch.Success)
{
string requestRaw = proxyRequest.Substring(0, getEndMatch.Index);
string postRaw = null;
processedRequestBytes = getEndMatch.Index + 4;
Match contentEncodingTypeMatch = Regex.Match(proxyRequest, "^Content-Type:\\s+\\S+?\\s*;\\s*charset=(\\S+)?", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (contentEncodingTypeMatch.Success)
{
charset = contentEncodingTypeMatch.Groups[1].Value.ToLower();
}
Encoding requestEncoding = null;
try
{
requestEncoding = Encoding.GetEncoding(charset);
}
catch (ArgumentException)
{
requestEncoding = wwwProxy_.defaultEncoding_;
}
Match contentLengthMatch = Regex.Match(requestRaw, "^Content-Length:\\s+(\\d+)[ \t]*[\r\n]*", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (contentLengthMatch.Success)
{
int contentsLength = Convert.ToInt32(contentLengthMatch.Groups[1].Value);
if (proxyRequest.Length >= processedRequestBytes + contentsLength)
{
postRaw = requestEncoding.GetString(receiveBuffer, processedRequestBytes, contentsLength);
processedRequestBytes += contentsLength;
for (int i = processedRequestBytes; i < bytesReceived; ++i)
{
if ((receiveBuffer[i] == '\r') || (receiveBuffer[i] == '\n'))
{
processedRequestBytes++;
}
else
{
break;
}
}
}
else
{
requestRaw = null;
postRaw = null;
}
}
if (requestRaw != null)
{
requestRaw = Regex.Replace(requestRaw, "([A-Z]+)\\s+([a-zA-Z]+://.*?/)(.*?)\\s+(HTTP/\\d.\\d)", "$1 /$3 $4", RegexOptions.IgnoreCase | RegexOptions.Multiline);
requestRaw = Regex.Replace(requestRaw, "^Accept-Encoding:\\s+(.*)?[ \t]*[\r\n]*", "", RegexOptions.IgnoreCase | RegexOptions.Multiline);
requestRaw = Regex.Replace(requestRaw, "^Content-Length:\\s+(.*)?[ \t]*[\r\n]*", "", RegexOptions.IgnoreCase | RegexOptions.Multiline);
requestRaw = Regex.Replace(requestRaw, "^Proxy-Connection:\\s+(.*)?[ \t]*[\r\n]*", "", RegexOptions.IgnoreCase | RegexOptions.Multiline);
requestRaw = requestRaw.TrimEnd(" \t\r\n".ToCharArray());
Match hostMatch = Regex.Match(requestRaw, "^Host:\\s+(\\S*)?", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (hostMatch.Success)
{
string host = hostMatch.Groups[1].Value;
string port = ssl_ ? "443" : "80";
Match portMatch = Regex.Match(host, "(:)(\\d{1,5})");
if (portMatch.Success)
{
port = host.Substring(portMatch.Groups[2].Index, portMatch.Groups[2].Length);
host = host.Substring(0, portMatch.Groups[1].Index);
}
ProxyRequest request = new ProxyRequest();
request.inbound_ = this;
request.ssl_ = ssl_;
request.header_ = requestRaw;
request.data_ = postRaw;
Outbound sendOutbound = null;
currentOutboundsMutex_.WaitOne();
foreach (Outbound o in currentOutbounds_.Keys)
{
if ((o.host_ == host) &&
(o.port_ == Convert.ToUInt16(port)) &&
(currentOutbounds_[o] == null))
{
sendOutbound = o;
currentOutbounds_[o] = request;
break;
}
}
currentOutboundsMutex_.ReleaseMutex();
if (sendOutbound == null)
{
sendOutbound = new Outbound(wwwProxy_, this, ssl_, host, Convert.ToUInt16(port));
currentOutboundsMutex_.WaitOne();
currentOutbounds_.Add(sendOutbound, request);
currentOutboundsMutex_.ReleaseMutex();
}
if (!internalRequest)
{
wwwProxy_.OnRequest(request);
}
else
{
wwwProxy_.Pass(request);
}
StartKeepAliveTimer();
}
}
else
{
processedRequestBytes = 0;
}
}
}
else
{
string connectHost = httpMatch.Groups[2].Value;
string host = connectHost;
string port = "443";
Match portMatch = Regex.Match(host, "(:)(\\d{1,5})");
if (portMatch.Success)
{
port = host.Substring(portMatch.Groups[2].Index, portMatch.Groups[2].Length);
host = host.Substring(0, portMatch.Groups[1].Index);
}
Outbound outbound = new Outbound(wwwProxy_, this, true, host, Convert.ToUInt16(port));
currentOutboundsMutex_.WaitOne();
currentOutbounds_.Add(outbound, null);
currentOutboundsMutex_.ReleaseMutex();
Match connectEndMatch = Regex.Match(proxyRequest, "\r\n\r\n", RegexOptions.Multiline);
if (connectEndMatch.Success)
{
processedRequestBytes = connectEndMatch.Index + 4;
}
byte[] sslResponseBytes = wwwProxy_.defaultEncoding_.GetBytes("HTTP/1.0 200 OK\r\n\r\n");
Send(sslResponseBytes, 0, sslResponseBytes.Length);
ssl_ = true;
sslNetworkStream_ = new NetworkStream(inboundSocket_);
sslStream_ = new SslStream(sslNetworkStream_, false, new RemoteCertificateValidationCallback(OnRemoteCertificateValidation));
X509Certificate serverCertificate = new X509Certificate((wwwProxy_.certificate_ != null) ? wwwProxy_.certificate_ : "WwwProxy.cer");
sslStream_.AuthenticateAsServer(serverCertificate);
}
}
else
{
int lineEnd = proxyRequest.IndexOf("\r\n");
throw new Exception("Unhandled Request \"" + proxyRequest.Substring(0, (lineEnd > 0) ? lineEnd : proxyRequest.Length) + "\"");
}
return(processedRequestBytes);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
internal void Complete(ProxyRequest request)
{
Outbound sendOutbound = null;
try
{
currentOutboundsMutex_.WaitOne();
foreach (Outbound o in currentOutbounds_.Keys)
{
if (currentOutbounds_[o] == request)
{
sendOutbound = o;
break;
}
}
currentOutboundsMutex_.ReleaseMutex();
}
catch (ObjectDisposedException)
{
}
request.completedHeader_ = request.header_;
if (request.data_ != null)
{
request.completedHeader_ += "\r\nContent-Length: " + Convert.ToString(request.data_.Length) + "\r\n\r\n" + request.data_;
}
else
{
request.completedHeader_ += "\r\n\r\n";
}
if (sendOutbound != null)
{
if (sendOutbound.useRemoteProxy_)
{
Match noUrlMatch = Regex.Match(request.completedHeader_, "([A-Z]+)\\s+/(.*?)\\s+(HTTP/\\d.\\d)", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (noUrlMatch.Success)
{
Match hostMatch = Regex.Match(request.completedHeader_, "^Host:\\s+(\\S*)?", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (hostMatch.Success)
{
string host = hostMatch.Groups[1].Value;
string insert = (sendOutbound.ssl_ ? "https://" : "http://") + host + "/";
request.completedHeader_ = Regex.Replace(request.completedHeader_,
"([A-Z]+)\\s+/(.*)\\s+(HTTP/\\d.\\d)",
"$1 " + insert + "$2 $3", RegexOptions.IgnoreCase | RegexOptions.Multiline);
}
}
}
if (wwwProxy_.ntlmEnabled_)
{
MatchCollection basicCredentials = Regex.Matches(request.completedHeader_,
"^(Proxy-)*Authorization:\\s+Basic\\s+([a-zA-Z0-9=]*)[ \t]*[\r\n]*",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (basicCredentials.Count > 0)
{
Match urlMatch = Regex.Match(request.completedHeader_, "([A-Z]+)\\s+(.*?)\\s+HTTP/\\d.\\d\r$", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if (urlMatch.Success)
{
string ntlmSite = sendOutbound.host_ + ":" + sendOutbound.port_;
string ntlmPath = urlMatch.Groups[2].Value;
INtlm wwwProxyNtlm = null;
try
{
wwwProxy_.ntlmListMutex_.WaitOne();
foreach (INtlm w in wwwProxy_.ntlmList_)
{
if ((w.Site == ntlmSite) && (w.Path == ntlmPath))
{
foreach (Match basicCredentialsMatch in basicCredentials)
{
if ((w.Type == basicCredentialsMatch.Groups[1].Value) ||
((w.Type == "WWW") && (basicCredentialsMatch.Groups[1].Value == "")))
{
w.Basic = basicCredentialsMatch.Groups[2].Value;
wwwProxyNtlm = w;
break;
}
}
if (wwwProxyNtlm != null)
{
break;
}
}
}
if (wwwProxyNtlm == null)
{
foreach (INtlm w in wwwProxy_.ntlmList_)
{
if ((w.Site == ntlmSite) && (w.Basic != null))
{
foreach (Match basicCredentialsMatch in basicCredentials)
{
if ((w.Basic == basicCredentialsMatch.Groups[2].Value) &&
((w.Type == basicCredentialsMatch.Groups[1].Value) ||
((w.Type == "WWW") && (basicCredentialsMatch.Groups[1].Value == ""))))
{
INtlm cloneWwwProxyNtlm = wwwProxy_.ntlmFactory_.CreateInstance();
if (cloneWwwProxyNtlm != null)
{
cloneWwwProxyNtlm.Site = ntlmSite;
cloneWwwProxyNtlm.Path = ntlmPath;
cloneWwwProxyNtlm.Type = w.Type;
cloneWwwProxyNtlm.Basic = w.Basic;
wwwProxy_.ntlmList_.Add(cloneWwwProxyNtlm);
wwwProxyNtlm = cloneWwwProxyNtlm;
}
break;
}
}
if (wwwProxyNtlm != null)
{
break;
}
}
}
}
if (wwwProxyNtlm != null)
{
string[] credentials = wwwProxy_.defaultEncoding_.GetString(Convert.FromBase64String(wwwProxyNtlm.Basic)).Split(':');
string ntlmNegotiate = null;
string domain = sendOutbound.host_;
string username = credentials[0];
string password = credentials[1];
if (username.Contains("\\"))
{
int domainUsernameSeparator = username.IndexOf('\\');
if ((domainUsernameSeparator > 0) && (domainUsernameSeparator < (username.Length - 1)))
{
domain = username.Substring(0, domainUsernameSeparator);
username = username.Substring(username.IndexOf('\\') + 1);
}
}
wwwProxyNtlm.Initialise(domain, username, password);
ntlmNegotiate = wwwProxyNtlm.Continue(null);
if (ntlmNegotiate == null)
{
ntlmNegotiate = "???";
}
string authReplace = "^(" + (wwwProxyNtlm.Type == "Proxy" ? "Proxy-" : "") +
"Authorization:\\s+)Basic\\s+[a-zA-Z0-9=]+[ \t]*([\r\n]*)";
request.completedHeader_ = Regex.Replace(request.completedHeader_,
authReplace,
"${1}NTLM " + ntlmNegotiate + "${2}",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
}
}
finally
{
wwwProxy_.ntlmListMutex_.ReleaseMutex();
}
}
}
}
wwwProxy_.log_.Write("Inbound.Complete()", request.completedHeader_);
sendOutbound.Connect();
try
{
sendOutbound.Send(request);
}
catch (IOException)
{
}
catch (SocketException)
{
}
}
}
