mallumo

e2e encryption in weechat using libsodium.

Dependencies

python-3.8 or newer.
pynacl

N.B. I have only tested this on python3.10, but it should work with others too.

Installation

First clone the repo and symlink the python module into your weechat autoload directory:

$ git clone https://github.com/darkrenaissance/mallumo
$ cd ~/.weechat/python
$ ln -s /path/to/mallumo/mallumo/ # Note this is the inner mallumo dir
$ ln -s $(realpath mallumo/__init__.py) autoload/mallumo.py

With this method, you can receive updates seamlessly, just by issuing git pull.

Usage

In weechat:

/help mallumo

[python/mallumo]  /mallumo  gen
                            kex
                            reset
                            status
                            enable
                            disable


E2E encryption for private IRC messages

Quick start:

Add an E2E item to the status bar by adding '[mallumo]' to the config setting
weechat.bar.status.items. This will show if your current chat is encrypted.

Usage:
/mallumo gen          [ generate a new keypair ]
/mallumo kex          [ initiate an e2e encrypted session ]
/mallumo reset [-f]   [ unset the public key associated to the current buffer ]
/mallumo status       [ show and possibly initialize a session ]
/mallumo disable      [ disable encryption for current buffer ]
/mallumo enable       [ enable encryption for current buffer ]

Before exiting, do run /save in order to make sure keep any pubkeys you have exchanged.

Protocol

Basic NaCl box, no ephemeral keys, persistent sessions.

from base64 import b64encode, b64decode
from nacl.public import PublicKey, PrivateKey, Box

alice = PrivateKey.generate()
alice_sessions = {}

bob = PrivateKey.generate()
bob_sessions = {}

# Key exchange
alice_pub = f"{b64encode(alice.public_key.encode()).decode()}"
bob_pub = f"{b64encode(bob.public_key.encode()).decode()}"

send_to_bob(f"?e2e_kexreq:{alice_pub}?")

msg = bob.recv()
alice_pub = decode_kexeq(msg)
send_to_alice(f"?e2e_kexrep:{bob_pub}?")

bob_sessions["alice"] = Box(bob, alice_pub)

msg = alice.recv()
bob_pub = decode_kexrep(msg)
alice_sessions["bob"] = Box(alice, bob_pub)

enc_msg = alice_sessions["bob"].encrypt("foo")
send_to_bob(f"?e2e_msg:WW91IGJhc3RhcmQgbG1hby4gQnV5IHRoZSBkaXAhCg==?")

License

GNU GPL version 3