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Re: [tor-dev] [liberationtech] Help test the new Tor Browser!
by Bernard Tyers - ei8fdb 17 Jun '13

17 Jun '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Congratulations Tor Project. Well done to Mike Perry and all the contributors. I've tested it on Mac OS X 10.6.8 and Debian 6.0 Squeeze and I had no technical issues on either. First launch (using clear Internet connection) took approx 40-50 seconds on each. (Debian was running as a VM on a Macbook Pro) The biggest usability hurdle for Tor (IMO) was having the browser launching separately to the Tor application. I've tested with users and this was a huge confusion for them. It wasn't a browser as *they* understand one. Now it is. First prong of the attack: this is how privacy enhancing software should behave - the exact same as all other software. Now Tor is even better. Second prong of the attack. Run more exit nodes. - From the quick run through I did, here are some(possibly minor) suggestions: 1. The installed application icon is as follows http://diymobileusabilitytesting.net/bernard/skitches/tbb-3.0alpha1-icon1-2… However when the application is opened, the application icon is this http://diymobileusabilitytesting.net/bernard/skitches/tbb-3.0alpha1-icon2-2… It may be confusing for someone who was not familiar with the different icons used by the TP. 2. The copy displayed during the initial install ("Before the Tor Browser Bundle tries to connect to the Tor network, you need to provide information about this computer's Internet connection) could possibly be reworded to give some context as to *why* it is being asked for. (Possibly reposition the copy to above the connection steps) Alternatively, is it possible for the install to run these two tests and determine to correct outcome? Ie. 1. Run some "tests" to determine if the Internet connection is clear of obstacles, then 2. Run some "tests" to check if the Internet connection is censored/filtered. Based on the outcome of these tests, Tor could then configure the connection as necessary. I could see this step being confusing for users not familiar with their Internet connection. 3. It would be interesting to see the numbers of users who actually follow the "Test Tor Network Settings" link. Once the TBB has installed and displays the "Congratulations! This browser is configured to use Tor." page, are users guaranteed to be connected to the Tor network? If so is there any need for the Test Tor Network..." link? Is it possible to display that information on the startpage? It is also very nice that the user preferences have been altered to be more privacy enhancing (History, etc). Congratulations to all involved. It is great work. Bernard On 17 Jun 2013, at 17:02, Michael Carbone wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Congratulations Tor devs! Serious kudos -- this is exactly the > direction TBB needs to go. > > A couple minor things: the order of the addons in the toolbar seems > arbitrary (particularly the location of the Tor button, NoScript, and > HTTPS Everywhere). I'm sure it's not, but at minimum it might be good > in the about:tor splash page to have an arrow pointing to the location > of the TorButton in the toolbar if folks need to change settings. > Also, the search button image in about:tor is pixelated. > > This is a huge step forward in UX, very exciting! > > Michael > > On 06/17/2013 09:45 AM, Jacob Appelbaum wrote: >> Hi, >> >> I'm really excited to say that Tor Browser has had some really >> important changes. Mike Perry has really outdone himself - from >> deterministic builds that allow us to verify that he is honest to >> actually having serious usability improvements. I really mean it - >> the new TBB is actually awesome. It is blazing fast, it no longer >> has the sometimes confusing Vidalia UI, it is now fast to start, it >> now has a really nice splash screen, it has a setup wizard - you >> name it - nearly everything that people found difficult has been >> removed, replaced or improved. Hooray for Mike Perry and all that >> helped him! >> >> Here is Mike's email: >> >> https://lists.torproject.org/pipermail/tor-talk/2013-June/028440.html >> >> Here is the place to download it: >> >> https://people.torproject.org/~mikeperry/tbb-3.0alpha1-builds/official/ >> >> Please test it and please please tell us how we might improve it! - -------------------------------------- Bernard / bluboxthief / ei8fdb IO91XM / www.ei8fdb.org -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org iQEcBAEBAgAGBQJRv4OOAAoJENsz1IO7MIrrCcQH/iic0Jy+xpAfFTXs29cxuQV2 Lcw/Im2uxxxwapQGK3+7hGWkfynwG+O/CvyN/RaFbCx6a2GywS8D++SAhSEpCVyL GMA6Vx8ZqiJ5KoqQkQ2Y2ENCMLkGIxgD374+bfSkHS5wkSmBesV2/DMva96PxO9e KZT9qZve/OwlXgsCKA0Z1CuHxPpxrbC9htNpRSJ31GUjNv+jZc6OIhDdAEbayx2W IBlgtsrb+glRe5gl1cRaBej3fnn6/zFoVoOMTQhwQEQr6xo8bvQUEcyNsHjMS6gW J6c3hSGcMmUnesvYCOv/x5BXGvC0FQBHHpk4+jh3zNeU3VAik59BLiVQ7e1PCL0= =ad2Q -----END PGP SIGNATURE-----

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difference between cached-descriptors and cached-consensus
by moataz ahmed 16 Jun '13

16 Jun '13

I have one question please what is the difference between cached-descriptors and cached-consensus Best Regards Moataz Ahmed,

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Torsocks locking design
by David Goulet 16 Jun '13

16 Jun '13

Hi everyone, I'm posting here the small design document I've made for the Torsocks locking mechanism. I'm looking for reviews, comments, improvements, ... well anything useful! :). (Even English mistakes since it's not my primary language). Future changes will be pushed here if any are needed after this thread is done with. https://github.com/dgoulet/torsocks/blob/rewrite/doc/proposals/01-Thread-sa… Thanks people! David

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TBB check sums
by Linus Nordberg 15 Jun '13

15 Jun '13

Hi, I've built TBB's using the new and shiny gitian thing. Thank you Mike Perry for putting lots of effort into this! I'm at commit f4869b0b (tor-browser-bundle.git). Check sums below. --8<---------------cut here---------------start------------->8--- user@host:~/usr/src/tor-browser-bundle/gitian$ sha256sum TorBrowserBundle-3.0-alpha-1-osx32_* tor-browser-linux* torbrowser-install-3.0-alpha-1_* 1f3265462f267c30bf9bf8a8ac41904f03166f49ce78ed1c88e16915bf644313 TorBrowserBundle-3.0-alpha-1-osx32_de.zip f588f5ffebea4fce1ecac7d4c694b94afd202e0d82fbf6a19e153c8e9c8e8f12 TorBrowserBundle-3.0-alpha-1-osx32_en-US.zip d7067a2eae9b1899e854aa1083653b452ed33137139ed94807651c208b17da33 TorBrowserBundle-3.0-alpha-1-osx32_es-ES.zip 372d9790ca6be27f617afb97ad7923d46f8b823935375ce3262abd09af6038ab TorBrowserBundle-3.0-alpha-1-osx32_fa.zip dfd614b35d00a2ac9f5d5196bd4f0064fc53a43e909e32cbc847b42121463c85 TorBrowserBundle-3.0-alpha-1-osx32_fr.zip 735bd35612a756e28d011d61c5d682be4305d33db8f48b6e8721ff40c0784e7b TorBrowserBundle-3.0-alpha-1-osx32_it.zip cf38210e03a64bec93e94a8c28bb9b3e3462f4588d816515a10a22ef39126392 TorBrowserBundle-3.0-alpha-1-osx32_ko.zip 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Torsocks reengineered
by David Goulet 14 Jun '13

14 Jun '13

Hi everyone, About a week ago I've sent an email to the Torsocks maintainers to address some concerns I had about important issues of the current code base. For the reasons found below, I proposed a rewrite that I am willing to do and submit it to the community once I feel ok with it. After some back and forth, the consensus was that I should go ahead and do it. Best case scenario, I come up with a tested library that has a smaller set of problems (hopefully) and could eventually be considered to replace the current version. Worst case, I lose my time :). Now, I'm not looking to do that alone in my corner or anything, what I want is this effort to be as open as possible for everyone that want to help, contribute or/and follow it. Some help would be really appreciated for the compat. part (Windows, OS X, BSD, etc...). Here is the repository I've created and started working on the rewrite. It has been branched from upstream master at commit e0bf65b5d3ca0e28b827c08d80b0fe1841d5a149 https://github.com/dgoulet/torsocks/tree/rewrite There might be some rebasing going on in that branch in the next weeks so please don't consider it right now as "git stable" since I'm in the heavy part of getting everything together before starting a "normally growing" master branch. If you like to contribute or help, let me know and we'll make something work. Big thanks to nickm, ioerror and sysrqb for their help on all this. Cheers! David Torsocks rewrite reasons: --------------- (You can see that as either we put in 2000 lines of code to fix it in a ~3000 lines repository or we start fresh with some key aspect, maintainability and security in mind.) Code and Maintenance Issues: 1) The code needs to be easier to maintain, so that it isn't sporadically maintained. Considering the number of issues (see below), it needs more love on a regular basis right now. 2) It has never been safe from the start so a rewrite will NOT impact the current state of security. There is not much tests right now. 3) Small code base. Fix it clean before it gets too big. 4) One of the biggest technical issues is that it's not thread safe and fixing it right now would add an important impact on performance adding locks to multiple global data structures. A clean rewrite would allow to take into account this *very* important feature from the start without any ugly hacks in the current code base. 5) This is a very, and I can't stress this enough, _VERY_ intrusive library so extra care MUST be put in making it bullet proof in terms of error handling. Right now, there is multiple call sites that can fail on error. 6) There is not even close to enough tests, thus not loosing that stable portion of a project. 7) No compatibility layer is present for multiple OS and architecture. 8) FD passing through Unix socket support. * Should at least be detected and notify the user or even deny execution since the process receiving the socket is not under torsocks control. 9) Symbol name space polluted. (should all be prefixed). 10) Libc hijacked calls of torsocks don't return correct values in error path. * This is bad because for instance the caller expect errno to be set and makes decision upon that value that MUST be right once returned. There is multiple call sites that are problematic. 11) IPv6 support. ----------------

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Tor over Open Garden mesh network
by Paige Peterson 13 Jun '13

13 Jun '13

Hello all, I was recommended to join this group after emailing the general help address with the following message: I am the Community Manager for Open Garden <https://opengarden.com>, a p2p mesh networking application for phones, tablets and laptops. Currently, Tor doesn't work over Open Garden and when talking to my lead developer about it a while ago, he said that Tor would need to support an upstream proxy - which he can't find any documentation on. Some users of Open Garden have requested the ability to use Tor over the Open Garden protocol and as the Community Manager, I am attempting to understand whether or not this is feasible to implement. If there is any light that can be shed from your side as to what would need to happen to support each other, then please enlighten me! If it would be more productive to have a conversation with our lead developer, then I can ask him to join the list as well. Thanks for your time! -- Paige Peterson Open Garden Community Manager forum.opengarden.com

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Building better pluggable transports - GSoC 2013 project
by Chang Lan 11 Jun '13

11 Jun '13

Hello everyone! I am a Tor GSoC student who will be working on the pluggable transports this summer. My mentor is Steven and my co-mentor is George Kadianakis. It is great to be part of the Tor community! Steven already kicked off the discussion about how to build better transports. The original project proposal[1] discussed the possibility of sending data over UDP with extra efforts to guarantee reliable in-order delivery. However, as George mentioned recently[3], ScrambleSuite[2] may already solve the issue of scanning resistance. Given that ScrambleSuite is being deployed, improving protocol obfuscation will be my main focus. HTTP impersonation is really useful, since there are numerous HTTP proxy outside the censored region, while the number of bridges is quite limited. What I'm gonna be doing during the summer is implementing a good enough HTTP impersonation based on pluggable transports specification. There are still many open questions indeed. Discussions are more than welcome! I'll be keeping my GSoC log here: http://changlan.github.io/obfsproxy I'm also available #tor-dev@oftc with the handle "clan", feel free to ping me there! [1]: http://changlan.info/gsoc.html [2]: http://www.cs.kau.se/philwint/scramblesuit/ [3]: https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/changla… Cheers, Chang

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Help Wanted: Evaluate our Tool for (privacy-preserving) Automated Debugging
by Christian Grothoff 11 Jun '13

11 Jun '13

Hi! Collecting good bug reports from users is a challenge, as most users are unable (or unwilling) to inspect problems in depth. Existing tools to automatically report program failures are often problematic as they either produce superficial reports or are prone to leaking private information (i.e. by including a full snapshot of the process address space in the form of a core dump). At TUM, we are developing Monkey[1], a free software tool that automatically generates high-quality privacy-preserving bug reports (for C code) which we hope to use for GNUnet and Tor eventually. (It runs with GNUnet and Tor already, but might need more work prior to real-world use.) We have reproduced and analyzed a set of real-world bugs using the system and would now like to study how well developers can find the bugs using the extracted information. Please participate in our public "survey" (or rather, experiment) where we measure your performance at identifying bugs based on crash reports collected via different methods, including traditional stack traces, core dumps (accessed via a live gdb session) and of course Monkey. So if you can spare the time, please help our efforts by participating in our survey[1] and passing the link to your colleagues and friends. (Who finds more bugs faster?) [0]: https://gnunet.org/monkey/ [1]: https://gnunet.org/monkey/survey/index.php/943594?lang=en Happy hacking! Christian Grothoff & Markus Teich p.s.: We'll be happy to talk with you about Monkey at the Tor developer meeting in Munich; however, Markus's thesis deadline is earlier...

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Re: [tor-dev] grabbing Tor circuit (node) data- Tor stem, torrc and Tor control port
by Damian Johnson 11 Jun '13

11 Jun '13

Hi Sarah. I'm not really sure what you're trying to ask in most of these questions. Assuming that your goal is simply 'I want to connect to port 9051 and dump information about all the relays I'm presently using in my circuits' then the following should do the trick. Take the following with a grain of salt - I just wrote it, I haven't tried running it. Should be close though. ;) from stem.control import Controller with Controller.from_port(port = 9051) as controller: my_relay_fingerprints = [] # fingerprints of all relays in our circuits for circ in controller.get_circuits(): my_relay_fingerprints += [fp for (fp, nickname) in circ.path] for fingerprint in my_relay_fingerprints: desc = controller.get_network_status(fingerprint) country = controller.get_info("ip-to-country/%s" % desc.address, "unknown") print "relay: %s:" % fingerprint print " address: %s:%s" % (desc.address, desc.or_port) print " locale: %s" % country Did you have any other questions? On Mon, Jun 10, 2013 at 9:43 AM, SARAH CORTES <sarah(a)lewis.is> wrote: > Damian, thanks, this is very helpful. > > is there a way to do this in torrc? Else, i suppose i will need to: > > 1) create a socket or connection to my port 9051 ; do i need/can i use > TORRC_CONTROL_SOCKET ? > 2) call get_circuits() ; grab the relay fingerprints > Do I need circuit = controller.get_circuit(circ_id) > 3) return class:`stem.events.CircuitEvent` ; for the given circuit > Not sure whether or where to use the "path" attribute > 4) call controller.get_network_status() to get IP address, nickname, ORPort, > Should I use: > desc_by_fingerprint = controller.get_network_status(test_relay.fingerprint) > > + desc_by_nickname = > controller.get_network_status(test_relay.nickname) > > 5) use Maxmind- i already have the GeoIPLite DB to grab AS and country, and > onion code also from Arturo > > > Any guidance is appreciated > > > https://lists.torproject.org/pipermail/tor-commits/2012-December/051174.html > > get_circuit(self, circuit_id, default = UNDEFINED): > + """ > + Provides a circuit presently available from tor. > + > + :param int circuit_id: circuit to be fetched > + :param object default: response if the query fails > + > + :returns: :class:`stem.events.CircuitEvent` for the given circuit > + > + :raises: > + * :class:`stem.ControllerError` if the call fails > + * ValueError if the circuit doesn't exist > + > + An exception is only raised if we weren't provided a default > response. > + """ > + > + try: > + for circ in self.get_circuits(): > + if circ.id == circuit_id: > + return circ > + > + raise ValueError("Tor presently does not have a circuit with the id > of '%s'" % circuit_id) > + except Exception, exc: > + if default: return default > + else: raise exc > + > def get_circuits(self): > """ > Provides the list of circuits Tor is currently handling. > > > > On Jun 10, 2013, at 10:34 AM, Damian Johnson <atagar(a)torproject.org> wrote: > > Hi, Damian, thanks. I am happy to discuss it on tor-dev@. But I want to keep > off spam, which some of my questions at first may be, essentially Qs. But, > if you think they would be of interest to tor-dev, or others could help, > just let me know, and i will sign up for it. > > > They certainly are! If you're interested in tor and development then I > would definitely suggest being on that list. Including it for this > thread. > > I am trying to figure out how to pull in the nodes that are actually used in > my Tor circuits. They are the nodes reflected in the Network map function. > > > You want the get_circuits() method. As you mentioned the 'path' > attribute has the relays in your present circuits... > > https://stem.torproject.org/api/control.html#stem.control.Controller.get_ci… > > I have created a MySql DB of some of my Tor circuits and nodes which i am > analyzing. I grabbed 48 circuits with their 144 nodes and info (IP address, > nickname, country) manually from my laptop's Tor network map. > > > That certainly sounds painful. The circuit paths will provide the > relay fingerprints which you can use for get_network_status() to get > the address, nickname, ORPort, etc... > > https://stem.torproject.org/api/control.html#stem.control.Controller.get_ne… > > As for locales that would be done via get_info('ip-to-country/<address>')... > > https://gitweb.torproject.org/torspec.git/blob/HEAD:/control-spec.txt#l672 > > ... and ultimately to AS and country. > > > AS will require the Maxmind AS database or something else. I know that > Onionoo includes the AS information so the options that come to mind > are either to (a) see how it does it or (b) query Onionoo for this > information. > > https://onionoo.torproject.org/ > > And i have read much of the control-spec, don't know how much is out of date > > > The control-spec should be up to date. If there are any inaccuracies > then please let us know! > > Did you have any other questions? -Damian > > On Mon, Jun 10, 2013 at 4:44 AM, SARAH CORTES <sarah(a)lewis.is> wrote: > > Hi, Damian, thanks. I am happy to discuss it on tor-dev@. But I want to keep > off spam, which some of my questions at first may be, essentially Qs. But, > if you think they would be of interest to tor-dev, or others could help, > just let me know, and i will sign up for it. > > For example, I am trying to figure out how to pull in the nodes that are > actually used in my Tor circuits. They are the nodes reflected in the > Network map function. I have read your fine stem tutorials, it is so > impressive you have dome so much work and documentation on your own > initiative. It is certainly a huge help to me and otter researchers like me. > > I have created a MySql DB of some of my Tor circuits and nodes which i am > analyzing. I grabbed 48 circuits with their 144 nodes and info (IP address, > nickname, country) manually from my laptop's Tor network map. I am analyzing > their country, so I am seeking to map nickname or fingerprint of the node to > IP address and ultimately to AS and country. Ultimately, I am analyzing > jurisdictional arbitrage and the hostility factors of differ countries to > Tor traffic, and whether it is possible to incorporate country or AS in to > the Tor path algorithm. > > I can see the entry guard nicknames and fingerprints in my state file and > pick them up there, if necessary. Wish i could just edit the logs to display > all nodes, then figure out how to map the node fingerprint or nickname to > its IP address them AS and country. I understand there is a Tor atlas > function but have not read it carefully yet. > > I have read documentation on the contents of the consensus file, the > descriptors, geoip and state files, and played around with them a bit to > understand them. I grasp that a fingerprint is a hash of the node's public > key, and one or both of which seem to be the most reliable ID for a node. > > I can see from your documentation that variable path(nickname, fingerprint) > contains the data i want. Just need to be able to get that data easily. Not > sure if editing my torrc file is the way or what. If you have any > suggestions, they are much appreciated. > > And i have read much of the control-spec, don't know how much is out of date > https://gitweb.torproject.org/torspec.git/blob/HEAD:/control-spec.txt > > I have read this on modifying torrc, and played around with modifying torrc, > on an elementary basis: > https://www.torproject.org/docs/faq.html.en#torrc > > and some tickets on modifying torrc > https://trac.torproject.org/projects/tor/ticket/6147 > > and what I believe is your excellent documentation on stem events; > https://stem.torproject.org/api/response.html#stem.response.events.Bandwidt… > > > > > > > > On Jun 8, 2013, at 2:31 PM, Damian Johnson <atagar(a)torproject.org> wrote: > > Hi Sarah. Yup, I'd be more than happy to help if you have any stem > questions. Email would definitely be better since we look to keep > missing each other on irc. I'd appreciate it though if we discussed it > on the tor-dev@ email list... > > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev > > On Sat, Jun 8, 2013 at 3:42 AM, SARAH CORTES <sarah(a)lewis.is> wrote: > > Hi Damian, I'm Sarah Cortes, a researcher. I tried you on irc on #tor-dev > but was unable to reach you. We met at the tor dev meeting which i attended > in March. I have some Qs for you regarding stem. Please let me know if you > are available, thanks > > >

2 1

traversing the source code of tor
by H S 10 Jun '13

10 Jun '13

Hi there, We would like to implement some specific protocol in Tor as an implementation project. Our one of pseudo codes that we have to take into account is the one mentioned on the paper under the link http://www.cypherpunks.ca/~iang/pubs/UC-OR.pdf , page 5, figure 2. I would like to know how can I connect or relate this pseudo code with the Tor source code to help us understand where we should insert our desired modification on the source code of the Tor. For instance in the first of the pseudo code line we have "upon an input (setup):". And know in which file/lines of the Tor source code we have this?

2 1

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