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[tor-bugs] #5593 [Tor Client]: Bug when using HTTP Proxy.

#5593: Bug when using HTTP Proxy.
------------------------+---------------------------------------------------
 Reporter:  munsternet  |          Owner:                     
     Type:  defect      |         Status:  new                
 Priority:  normal      |      Milestone:                     
Component:  Tor Client  |        Version:  Tor: 0.2.3.13-alpha
 Keywords:              |         Parent:                     
   Points:              |   Actualpoints:                     
------------------------+---------------------------------------------------
 Hello,

 I'm in an organization using Apache as a Proxy to provide Internet Access.

 I noticed that Tor isn't properly working, in fact the Proxy always
 replies with "400 Bad Request" errors.

 Here is my configuration file:

 {{{
 ControlPort 9051
 DirReqStatistics 0
 HTTPSProxy 10.0.51.254:80
 HTTPSProxyAuthenticator xxxxxx:xxxxxx
 Socks5ProxyUsername xxxxxx
 Socks5ProxyPassword xxxxxx
 Log notice stdout
 ReachableAddresses *:80,*:443
 ReachableAddresses reject *:*
 SocksListenAddress 127.0.0.1
 }}}

 I noticed that Tor does a CONNECT <remote ip> HTTP/1.1 and then sends the
 authentication information. This results in the 400 Bad Request error,
 because when using HTTP/1.1 you should provide a Host: header afaik.

 Here is a dump of the issue :

 {{{
 CONNECT 86.59.21.38:443 HTTP/1.1
 Proxy-Authorization: Basic xxxxxxxxxxxxxxxxxxxxxxxxxx

 HTTP/1.1 400 Bad Request
 Date: Tue, 10 Apr 2012 11:06:33 GMT
 Server: Apache/2.2.9 (Unix) mod_ssl/2.2.9 OpenSSL/0.9.8d DAV/2
 }}}

 And here is a "working" CONNECT using Putty (for example) :

 {{{
 CONNECT 88.191.119.38:443 HTTP/1.1
 Host: 88.191.119.38:443
 Proxy-Authorization: Basic xxxxxxxxxxxxxxxx
 HTTP/1.0 200 Connection Established
 Proxy-agent: Apache/2.2.9 (Unix) mod_ssl/2.2.9 OpenSSL/0.9.8d
 DAV/2SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3
 }}}

 I checked the GIT repository to find the issue, my guess is that it's
 around line 1487 in src/or/connection.c
 (https://gitweb.torproject.org/tor.git/blob?f=src/or/connection.c#l1487),
 but my C skills are rather limited...

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5593>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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