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Gajim and OTR

OTR (off-the-record) encryption is strong end-to-end encryption protocol for instant messaging (read more). OTR hasn't any XMPP XEP, because OTR is of cross-protocol nature.

And Gajim is a powerful XMPP-client without OTR support out-of-the-box.

Gajim >= 0.15 (or 0.14-hg)

Since version 0.15, Gajim has powerful plugin system. The gotr plugin is an modern OTR implementation from Kjell Bradden. gotr depends on python-potr.

To install the plugin follow these simple steps:

  1. Be sure, that currently installed version of gajim >= 0.15. If 0.15 version is not available, install aur:gajim-hg;
  2. Install aur:python-potr;
  3. Install/update the gajim plugins from hg.
    1. Install mercurial:
      $ sudo pacman -S mercurial
    2. Go to gajim plugins directory:
      $ mkdir -p ~/.local/share/gajim/plugins/; cd ~/.local/share/gajim/plugins/
    3. (at first time) Download all plugins:
      $ hg clone .
    4. (at next times) Update plugins to newer versions:
      $ hg pull; hg up
  4. [Re]Start gajim;
  5. Go to menu Edit => Modules;
  6. Activate the "Off-the-record encryption" plugin;
  7. (at first time) Click on plugin settings button, and generate your OTR key in gotr dialog.
  8. close dialogs to save the changes.

gajim <= 0.13

Note: gajim's otr-branch is unmaintained and obsoleted by gajim's plugin system (read above).

You can use aur:gajim-otr-hg PKGBUILD to build OTR-compatible 0.13 version of gajim. Main issues are:

  • Received otr-encrypted messages with HTML markup will be rendered raw, unformatted, with HTML tags;

The OTR setting will be located in the last tab of gajim parameters (Ctrl+P) -> Off-the-record encryption.