Help with creating a plugin (my master thesis)

[Agnieszka Pachuta]

Thank you very much for your quick response :) I will be in touch.

Cheers,
Agnieszka


On 3 February 2014 12:56, Quentin Glidic <sardemff7+pidgin at sardemff7.net>wrote:

> On 03/02/2014 02:29, Agnieszka Pachuta wrote:
>
>> Hi :)
>>
>
> Hi,
>
>
>
>  My name is Agnieszka. I study Computer Science at University of
>> Warsaw. As my master thesis, I'm going to create Pidgin plugin which
>> implements a cryptographic protocol described in the following paper:
>> https://eprint.iacr.org/2009/562.pdf (In short, I want to execute the
>> protocol before the start of conversation in order to establish a
>> secure communication key.) I've dug into libpurple code, but I still
>> have some problems. I would really appreciate your help with some of
>> them or just giving me some hints..
>>
>> 1. Is there any way to find out if a conversation partner has loaded
>> my plugin? If the other person haven't loaded the plugin, he sees
>> every message my plugin sent to him. I tried to use
>> purple_conv_im_send_with_flags but the messages are still being
>> displayed (maybe I don't know how to use these flags..) I know that
>> I can cancel the message by returning TRUE in receiving_im_msg
>> callback, but it will work only if the other person has loaded my
>> plugin.
>>
>
> It would require protocol specific support, and not all protocols can do
> that. XMPP probably can with an extension.
> I think a common practice is to send an handshake message with a human
> readable part asking the user to install the plugin. If the handshake is
> unsuccessful, the plugin can inform the sender user that the
> conversation will not be secure.
> You should look at the Pidgin-OTR plugin, they do something really
> similar IIUC.
>
>
>
>  2. The protocol require users to solve captcha puzzles. To show the
>> captcha image and get an answer from a user, I use
>> purple_request_fields. However, when the pop-up shows, user is able
>> to ignore it and start to communicate without solving a captcha. Is
>> there any way to block the possibility of communication until he
>> solves the captcha? I would like to wait for his answer somehow..
>> One of solution to this problem is to display captcha image directly
>> in the communication window. Is it possible?
>>
>
> I think you can use purple_conv_im_write() with markup and flags to
> display an image and just drop any outgoing message if it is not the
> captcha, directly in the conversation window.
>
>
>
>  3. I would like to create my own libraries and linked them to my main
>> plugin file. However, the example Makefile is really huge and I don't
>> know how to do that. I'm stuck with this problem..
>>
>
> In your case, I recommend to use a separate project with its own build
> system. Here is a little plugin of mine which uses and provides a
> library. It uses the GNU Autotools (you will need the autoconf,
> automake and libtool packages installed on your system). The relevant
> files are configure.ac and Makefile.am. They should be small enough to
> be easy for you to understand even with basic Autotools knowledge.
>
> https://github.com/sardemff7/purple-events
>
> Here is a quick guide on Autotools:
> https://www.flameeyes.eu/autotools-mythbuster/index.html
>
> Feel free to ask anything you might need, or to send over your files for a
> review if you want.
>
>
>
>  I'm sorry for a lot of text. I'll appreciate any clue :)
>>
>
> This is exactly what this mailing list is here for. :-)
>
>
> Cheers,
>
> --
>
> Quentin "Sardem FF7" Glidic
>
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