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Hi, I am quite new in here but I am interested to help and improve the TOR system. I am interested in PTs and particularly in developing a HTTP PT.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
After talking with asn, we conclude that a good point to start this development may be to focus on the HTTP transport part, that is to know how to control the browser or the server and how to embed the TOR traffic into the HTTP protocol (requests and responses). Things such as the data obfuscation, the delays in the communications and the packet chopping won't be considered, because it may be used another PT such Scramblesuit to do that task.
The CLIENT side:
TBB <-> Scramblesuit PT <-> HTTP PT <-> CENSOR NET
and the SERVER side:
CENSOR NET <-> HTTP PT <-> Scramblesuit PT <-> TOR bridge
The important is to know how to embed the TOR traffic already obfuscated into the requests and responses to avoid suspicion. Also as I said before, to know how to control a browser binary to make the HTTP traffic from the client side as much traditional as possible, for instance using a firefox binary or something like that. The same must be applied to the server side, implementing a real NGINX server or an Apache server on port 80 and writting some CGI to classify the traffic incoming from the TOR clients through the HTTP requests. The same server may have another CGI to write and send the HTTP responses to those TOR clients with the traffic into them.
I would like to find someone interested to work on this topic.
Thanks and I wait for your comments or suggestions!
[0] http://www.owlfolio.org/media/2010/05/stegotorus.pdf [1] http://www.cs.kau.se/philwint/pdf/wpes2013.pdf [2] https://www.ieee-security.org/TC/SP2013/papers/4977a065.pdf [3] https://github.com/sjmurdoch/http-transport/blob/master/design.md
dardok dardok@riseup.net writes:
Hi, I am quite new in here but I am interested to help and improve the TOR system. I am interested in PTs and particularly in developing a HTTP PT.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
After talking with asn, we conclude that a good point to start this development may be to focus on the HTTP transport part, that is to know how to control the browser or the server and how to embed the TOR traffic into the HTTP protocol (requests and responses). Things such as the data obfuscation, the delays in the communications and the packet chopping won't be considered, because it may be used another PT such Scramblesuit to do that task.
The CLIENT side:
TBB <-> Scramblesuit PT <-> HTTP PT <-> CENSOR NET
and the SERVER side:
CENSOR NET <-> HTTP PT <-> Scramblesuit PT <-> TOR bridge
The important is to know how to embed the TOR traffic already obfuscated into the requests and responses to avoid suspicion. Also as I said before, to know how to control a browser binary to make the HTTP traffic from the client side as much traditional as possible, for instance using a firefox binary or something like that. The same must be applied to the server side, implementing a real NGINX server or an Apache server on port 80 and writting some CGI to classify the traffic incoming from the TOR clients through the HTTP requests. The same server may have another CGI to write and send the HTTP responses to those TOR clients with the traffic into them.
I would like to find someone interested to work on this topic.
Hey there,
we discussed this project on IRC and looking at your post it seems that you understood things :)
Like I told you, I'm interested in this topic, but my free time is miniscule these days. Still, I'd like to help you out. Do you know what you need help with?
If you want, we can organize a meetup in IRC to discuss and plan future work on this.
It would be great if you prepared a bit of research on the basic components of this project [0] so that we can discuss the various options during the meeting. I'll send you an email to find the right date and time for the meeting :)
Cheers!
[0]: ways to control a browser from within a PT (selenium?), HTTP covert channels, designs of how a server-side CGI script would work, etc.
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George Kadianakis:
dardok dardok@riseup.net writes:
Hi, I am quite new in here but I am interested to help and improve the TOR system. I am interested in PTs and particularly in developing a HTTP PT.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
After talking with asn, we conclude that a good point to start this development may be to focus on the HTTP transport part, that is to know how to control the browser or the server and how to embed the TOR traffic into the HTTP protocol (requests and responses). Things such as the data obfuscation, the delays in the communications and the packet chopping won't be considered, because it may be used another PT such Scramblesuit to do that task.
The CLIENT side:
TBB <-> Scramblesuit PT <-> HTTP PT <-> CENSOR NET
and the SERVER side:
CENSOR NET <-> HTTP PT <-> Scramblesuit PT <-> TOR bridge
The important is to know how to embed the TOR traffic already obfuscated into the requests and responses to avoid suspicion. Also as I said before, to know how to control a browser binary to make the HTTP traffic from the client side as much traditional as possible, for instance using a firefox binary or something like that. The same must be applied to the server side, implementing a real NGINX server or an Apache server on port 80 and writting some CGI to classify the traffic incoming from the TOR clients through the HTTP requests. The same server may have another CGI to write and send the HTTP responses to those TOR clients with the traffic into them.
I would like to find someone interested to work on this topic.
Hey there,
we discussed this project on IRC and looking at your post it seems that you understood things :)
Like I told you, I'm interested in this topic, but my free time is miniscule these days. Still, I'd like to help you out. Do you know what you need help with?
If you want, we can organize a meetup in IRC to discuss and plan future work on this.
It would be great if you prepared a bit of research on the basic components of this project [0] so that we can discuss the various options during the meeting. I'll send you an email to find the right date and time for the meeting :)
Cheers!
[0]: ways to control a browser from within a PT (selenium?), HTTP covert channels, designs of how a server-side CGI script would work, etc. _______________________________________________ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
Hi,
I've been reading about Selenium web-browser driver thing and I consider that is not very handy to do what an HTTP PT client side needs, that is to forge HTTP requests and embbed the TOR traffic into these HTTP requests.
It is more oriented to emulated a web user interaction with a real browser (such as firefox, chrome, opera, ie, ...) and the interaction and testing of web apps from these browsers.
Also I cannot see how to handle the responses from the server-side using this thing. Few functions seem to be interesting regarding HTTP protocol handling and manipulation, as I said before most of the functions present are related with the user interaction.
The Python version can be installed easily: pip install selenium
The already implemented functions can be read on this file: /usr/share/pyshared/selenium/selenium.py
I didn't find any useful function to allow a HTTP PT (client side) embed the TOR traffic into HTTP requests (maybe some cookie function related) and extract the information sent by the HTTP PT server side (maybe some get_body_text() or get_text() funtion).
So I am ready to consider that this option is not be useful to implement a HTTP PT client side. Anyway, I would like to discuss this point with someone interested in this topic.
Thanks!
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On 17/11/13 14:22, dardok wrote:
Hi,
I've been reading about Selenium web-browser driver thing and I consider that is not very handy to do what an HTTP PT client side needs, that is to forge HTTP requests and embbed the TOR traffic into these HTTP requests.
It is more oriented to emulated a web user interaction with a real browser (such as firefox, chrome, opera, ie, ...) and the interaction and testing of web apps from these browsers.
Also I cannot see how to handle the responses from the server-side using this thing. Few functions seem to be interesting regarding HTTP protocol handling and manipulation, as I said before most of the functions present are related with the user interaction.
The Python version can be installed easily: pip install selenium
The already implemented functions can be read on this file: /usr/share/pyshared/selenium/selenium.py
I didn't find any useful function to allow a HTTP PT (client side) embed the TOR traffic into HTTP requests (maybe some cookie function related) and extract the information sent by the HTTP PT server side (maybe some get_body_text() or get_text() funtion).
So I am ready to consider that this option is not be useful to implement a HTTP PT client side. Anyway, I would like to discuss this point with someone interested in this topic.
Hey dardok, I am not an expert with any of these technologies at all, but perhaps you could look into this?
https://addons.mozilla.org/en-us/firefox/addon/mozrepl/
It's an extension you install that then lets you telnet-connect to it and control firefox - which means you could do that from a PT. (There might be an even cleaner interface for programmable access, telnet is just what's advertised on the front page.)
https://github.com/bard/mozrepl/wiki/Tutorial
This shows an example on how to visit a website (the remote bridge maybe) and get information out of the resulting page.
X
- -- GPG: 4096R/1318EFAC5FBBDBCE git://github.com/infinity0/pubkeys.git
Hi dardok,
Thanks for thinking about HTTP pluggable transports. It turns out to be a deceptively hard problem!
Do you have any initial high-level goals? Or are you just trying to figure out *some* way to bootstrap an existing HTTP client/server architecture to tunnel arbitrary data streams?
-Kevin
On Sun, Nov 17, 2013 at 6:22 AM, dardok dardok@riseup.net wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
George Kadianakis:
dardok dardok@riseup.net writes:
Hi, I am quite new in here but I am interested to help and improve the TOR system. I am interested in PTs and particularly in developing a HTTP PT.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
After talking with asn, we conclude that a good point to start this development may be to focus on the HTTP transport part, that is to know how to control the browser or the server and how to embed the TOR traffic into the HTTP protocol (requests and responses). Things such as the data obfuscation, the delays in the communications and the packet chopping won't be considered, because it may be used another PT such Scramblesuit to do that task.
The CLIENT side:
TBB <-> Scramblesuit PT <-> HTTP PT <-> CENSOR NET
and the SERVER side:
CENSOR NET <-> HTTP PT <-> Scramblesuit PT <-> TOR bridge
The important is to know how to embed the TOR traffic already obfuscated into the requests and responses to avoid suspicion. Also as I said before, to know how to control a browser binary to make the HTTP traffic from the client side as much traditional as possible, for instance using a firefox binary or something like that. The same must be applied to the server side, implementing a real NGINX server or an Apache server on port 80 and writting some CGI to classify the traffic incoming from the TOR clients through the HTTP requests. The same server may have another CGI to write and send the HTTP responses to those TOR clients with the traffic into them.
I would like to find someone interested to work on this topic.
Hey there,
we discussed this project on IRC and looking at your post it seems that you understood things :)
Like I told you, I'm interested in this topic, but my free time is miniscule these days. Still, I'd like to help you out. Do you know what you need help with?
If you want, we can organize a meetup in IRC to discuss and plan future work on this.
It would be great if you prepared a bit of research on the basic components of this project [0] so that we can discuss the various options during the meeting. I'll send you an email to find the right date and time for the meeting :)
Cheers!
[0]: ways to control a browser from within a PT (selenium?), HTTP covert channels, designs of how a server-side CGI script would work, etc. _______________________________________________ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
Hi,
I've been reading about Selenium web-browser driver thing and I consider that is not very handy to do what an HTTP PT client side needs, that is to forge HTTP requests and embbed the TOR traffic into these HTTP requests.
It is more oriented to emulated a web user interaction with a real browser (such as firefox, chrome, opera, ie, ...) and the interaction and testing of web apps from these browsers.
Also I cannot see how to handle the responses from the server-side using this thing. Few functions seem to be interesting regarding HTTP protocol handling and manipulation, as I said before most of the functions present are related with the user interaction.
The Python version can be installed easily: pip install selenium
The already implemented functions can be read on this file: /usr/share/pyshared/selenium/selenium.py
I didn't find any useful function to allow a HTTP PT (client side) embed the TOR traffic into HTTP requests (maybe some cookie function related) and extract the information sent by the HTTP PT server side (maybe some get_body_text() or get_text() funtion).
So I am ready to consider that this option is not be useful to implement a HTTP PT client side. Anyway, I would like to discuss this point with someone interested in this topic.
Thanks! -----BEGIN PGP SIGNATURE-----
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Hey dardok,
I really wanted to reach out to you earlier but I was very busy delivering Stegotorus deliverables at the time.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
Currently there is a steg module for Stegotorus which does that for the server side (http_apache). On the client side, I started modularizing the client that is actually sending the http request. So anybody can write a client (let say a Firefox or chrome plugin) which take care of sending the request and feed back the reply to Stegotorus. I did a bit of work here:
https://github.com/zackw/stegotorus/tree/f--ext-cover-client-comms
But it was a bit more time-consuming than the tight deadlines I had . So, I compromised on curl for a client side for now. So currently, on the client side, Stegotorus gives the URL to curl and curl send them and give back the response to Stegotorus. curl for example, can fake user agent but it would be great to have the user's own Firefox on the other end. So if you think it is something that interests you we can work on it together.
If you want to write a transport from Scratch, Kevin's point about "initial high-level goals" is very essential. If your only concerns is to adhere to valid HTTP 1.1 protocol then something like a "tcp over http" obfsproxy protocol shouldn't be that hard to implement. But if you want something that give a minimal resemblence to what usually look like HTTP on the Internet (and I assume you want that, otherwise why to go so much out of your way to pretend using a real browser and a http server) then the chopping and re-assembly will become the real pain.
The good thing about Stegotorus is that it is very modularized and you can easily do something like this:
TBB <-> Scramblesuit PT <-> Stegotorus as Chopper <-> HTTP PT <-> CENSOR NET
What I was aiming was
TBB <-> Scramblesuit PT <-> Stegotorus as Chopper <-> HTTP PT <-> Modified browser <-> CENSOR NET
And now is TBB <-> Scramblesuit PT <-> Stegotorus as Chopper <-> HTTP PT <-> curl <-> CENSOR NET
If you want to go extremely ambitious then something like Infarnet is the answer but with that channel capacity I highly doubt if you can even get a tor circuit bootstrapped.
Let me know if you are interested to work together on this.
Cheers, vmon
Kevin P Dyer kpdyer@gmail.com writes:
Hi dardok,
Thanks for thinking about HTTP pluggable transports. It turns out to be a deceptively hard problem!
Do you have any initial high-level goals? Or are you just trying to figure out *some* way to bootstrap an existing HTTP client/server architecture to tunnel arbitrary data streams?
-Kevin
On Sun, Nov 17, 2013 at 6:22 AM, dardok dardok@riseup.net wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
George Kadianakis:
dardok dardok@riseup.net writes:
Hi, I am quite new in here but I am interested to help and improve the TOR system. I am interested in PTs and particularly in developing a HTTP PT.
I've read some papers [0],[1],[2],[3] and the ticket #8676 and I consider that it would be a good idea to make an effort and try to implement the HTTP PT as is stated in the ticket, that is using real browser and server services.
After talking with asn, we conclude that a good point to start this development may be to focus on the HTTP transport part, that is to know how to control the browser or the server and how to embed the TOR traffic into the HTTP protocol (requests and responses). Things such as the data obfuscation, the delays in the communications and the packet chopping won't be considered, because it may be used another PT such Scramblesuit to do that task.
The CLIENT side:
TBB <-> Scramblesuit PT <-> HTTP PT <-> CENSOR NET
and the SERVER side:
CENSOR NET <-> HTTP PT <-> Scramblesuit PT <-> TOR bridge
The important is to know how to embed the TOR traffic already obfuscated into the requests and responses to avoid suspicion. Also as I said before, to know how to control a browser binary to make the HTTP traffic from the client side as much traditional as possible, for instance using a firefox binary or something like that. The same must be applied to the server side, implementing a real NGINX server or an Apache server on port 80 and writting some CGI to classify the traffic incoming from the TOR clients through the HTTP requests. The same server may have another CGI to write and send the HTTP responses to those TOR clients with the traffic into them.
I would like to find someone interested to work on this topic.
Hey there,
we discussed this project on IRC and looking at your post it seems that you understood things :)
Like I told you, I'm interested in this topic, but my free time is miniscule these days. Still, I'd like to help you out. Do you know what you need help with?
If you want, we can organize a meetup in IRC to discuss and plan future work on this.
It would be great if you prepared a bit of research on the basic components of this project [0] so that we can discuss the various options during the meeting. I'll send you an email to find the right date and time for the meeting :)
Cheers!
[0]: ways to control a browser from within a PT (selenium?), HTTP covert channels, designs of how a server-side CGI script would work, etc. _______________________________________________ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
Hi,
I've been reading about Selenium web-browser driver thing and I consider that is not very handy to do what an HTTP PT client side needs, that is to forge HTTP requests and embbed the TOR traffic into these HTTP requests.
It is more oriented to emulated a web user interaction with a real browser (such as firefox, chrome, opera, ie, ...) and the interaction and testing of web apps from these browsers.
Also I cannot see how to handle the responses from the server-side using this thing. Few functions seem to be interesting regarding HTTP protocol handling and manipulation, as I said before most of the functions present are related with the user interaction.
The Python version can be installed easily: pip install selenium
The already implemented functions can be read on this file: /usr/share/pyshared/selenium/selenium.py
I didn't find any useful function to allow a HTTP PT (client side) embed the TOR traffic into HTTP requests (maybe some cookie function related) and extract the information sent by the HTTP PT server side (maybe some get_body_text() or get_text() funtion).
So I am ready to consider that this option is not be useful to implement a HTTP PT client side. Anyway, I would like to discuss this point with someone interested in this topic.
Thanks! -----BEGIN PGP SIGNATURE-----
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dardok -
George Kadianakis -
Kevin P Dyer -
vmon＠riseup.net -
Ximin Luo