development blog


Posted at — Nov 27, 2020 by debxwoody

OMEMO with profanity.

Hello OMEMO!

OMEMO needs crytographic materials. You can generated this crytographic materials via /omemo gen. If you have more than one device, make sure you are trusting your other devices. Check your fingerprints via /omemo fingerprint. You may wont trust all your devices:

/omemo trust <Your XMPP-ID> <Your fingerpint>

Check the fingerprint of your buddy. List the fingerprints of your buddy via

/omemo fingerprint <XMPP-ID of your buddy>

Check the fingerprints with you buddy over a secure medium (phone or singed OpenPGP message) and trust the buddy’s fingerprint via the command:

/omemo trust <Buddy's XMPP-ID> <Buddy's fingerpint>

You can start a OMEMO Session via the omemo-start command /omemo start <buddy's XMPP-ID>.


Get the device list of your Buddy. Change the to and the from tag of the line shown below.

<iq type='get' from='your@domain.tld' to='buddy@domain.tld' id='getOmemoDeviceList'><pubsub xmlns=''><items node='eu.siacs.conversations.axolotl.devicelist'/></pubsub></iq>

Use the /xmlconsole to open the XMP Console Window and sent those line to your server.

The Server should return a result of the iq with id getOmemoDeviceList. There should be a item-Tag with the id current followed by a list of device id.

<items node="eu.siacs.conversations.axolotl.devicelist">
	<item id="current">
	<list xmlns="eu.siacs.conversations.axolotl">
	<device id="174235744"/>
	<device id="71071234"/>
	<device id="22318128"/>

The known devices and fingerprints are stored in ~/.local/share/profanity/omemo/<account>/known_devices.txt. The trust information are stored in ~/.local/share/profanity/omemo/<account>/trust.txt.

QR Code

If you need a QR Code of you Fingerprint, check xmppc. xmppc is a XMPP Command Line Tool which can be used to generate a QR Code.