Commit graph

48 commits

Author SHA1 Message Date
Andreas Straub 50b14434ee Reformat code 2015-07-31 21:31:45 +02:00
Andreas Straub 5c421da1e1 Change to new wire protocol version 2015-07-31 21:31:45 +02:00
Andreas Straub e10a6c5b87 Fix NPE: consider unknown keys UNDECIDED 2015-07-29 02:59:41 +02:00
Andreas Straub efcefc2e63 Refactor out inner classes, cache trust store
Moves SQLiteAxolotlStore and XmppAxolotlSession into proper classes.

IdentityKeys trust statuses are now cached in an LruCache to prevent
hammering the database when rendering the UI.
2015-07-29 02:59:26 +02:00
Andreas Straub db05d26433 Always build own device session automatically 2015-07-22 15:03:52 +02:00
Andreas Straub 92b5081b5e Add INACTIVE state for removed keys
We introduce a new trust state: INACTIVE. This state is intended for
old keys that have been removed.

When a TRUSTED device is removed from the PEP devicelist, it's status
will be set to INACTIVE. INACTIVE keys are shown in the UI as greyed
out, non-interactible key rows. Messages are not encrypted for INACTIVE
devices.

When an INACTIVE device reappears in PEP, or a message is received from
an INACTIVE device, it is set back to trusted.
2015-07-21 14:24:59 +02:00
Andreas Straub 3c5c0c7d3b Fill own device sessions into SessionMap 2015-07-21 14:24:59 +02:00
Andreas Straub b7ff2c3461 Use properly fixed numeral values in Trust enum
Why, oh God, why?! #thanksjamesgosling
2015-07-21 01:52:22 +02:00
Andreas Straub 639ebd644b Remove unused import 2015-07-21 01:17:29 +02:00
Andreas Straub 122bc97ce2 Switch payload encryption to AES-GCM
This also ensures that the IV is generated with proper randomness.
2015-07-21 01:17:14 +02:00
Andreas Straub 971aa3a11e Also decrypt messages from UNTRUSTED sessions 2015-07-20 23:16:06 +02:00
Andreas Straub d2845e9ac1 Refactor axolotl send processing/caching flow 2015-07-20 23:13:28 +02:00
Andreas Straub 8be0e8a27d Start TrustKeysActivity if no keys are TRUSTED
If there are no UNDECIDED keys, but none of the contact's keys are
trusted, redirect the user to the TrustKeysActivity
2015-07-20 22:35:07 +02:00
Andreas Straub ab2d114bbc Add purge axolotl key option
Can now long-press a key to permanently purge it.
2015-07-20 22:18:24 +02:00
Daniel Gultsch e79f82ca72 attempt to fix the delay problem 2015-07-20 18:11:33 +02:00
Andreas Straub 19a0ae42d6 Lock TrustKeys if no trusted keys are available 2015-07-20 14:56:41 +02:00
Andreas Straub 012f036840 Optimize imports 2015-07-20 14:26:29 +02:00
Andreas Straub 14010bf5a6 Ask for key trust when sending messages
If the contact (or the own account) has keys that have UNDECIDED trust,
we now drop the user into the new TrustKeysActivity, where they have to
decide for each new key whether it should be TRUSTED or UNTRUSTED.
2015-07-19 22:27:26 +02:00
Andreas Straub 9c4d55f82c Send correct body for HTTP files
When using HTTP upload to send files, take care to transmit only the URL
rather than the entire body, which contains metadata.
2015-07-19 22:23:28 +02:00
Andreas Straub 4038af2f47 Fix trust status for outgoing messages
Tag sent messages with own fingerprint, set own fingerprint as always
trusted, include own fingerprint in database trust search, explicitly
reset trust colorfilter
2015-07-19 22:23:28 +02:00
Andreas Straub 35714d3d08 Ensure that available sessions are always used
Any time a new session is established, call syncRosterToDisk() to ensure
that on subsequent restoreFromDatabase() calls, the roster is actually
available. This is important so that initAccountServices() can properly
initialize the SessionMap. This prevents a race condition where after
adding a new account and initiating sessions with it, if the app is
killed (e.g. by reinstall) before triggering a syncRosterToDisk(),
subsequent restores will not have the roster available, leading to
missing XmppAxolotlSessions in the SessionMap cache. As a result of
this, a new session was initiated when sending a new message, and
received messages could not be tagged with the originating session's
fingerprint.

As an added sanity check, go to the database to confirm no records are
present before creating fresh XmppAxolotlSession objects (both in the
sending and receiving case).
2015-07-19 22:23:27 +02:00
Andreas Straub 461d0446f7 Fix and expand key regeneration function
Wipe session cache to prevent stale sessions being used. Wipe fetch
status cache to enable recreation of sessions. Regenerate deviceId, so
that foreign devices will talk to us again.
2015-07-19 22:23:27 +02:00
Andreas Straub d173913eba Overhauled Message tagging
Messages are now tagged with the IdentityKey fingerprint of the
originating session. IdentityKeys have one of three trust states:
undecided (default), trusted, and untrusted/not yet trusted.
2015-07-19 22:17:58 +02:00
Andreas Straub f1d73b9d4e Use full int range for device IDs 2015-07-19 22:17:57 +02:00
Andreas Straub 540faeb54b Clean up unused constant 2015-07-19 22:17:57 +02:00
Andreas Straub bd29653a20 Make some fields final 2015-07-19 22:17:57 +02:00
Andreas Straub 3458f5bb91 Clean up logging
Add a fixed prefix to axolotl-related log messages, set log levels
sensibly.
2015-07-19 22:17:57 +02:00
Andreas Straub 7049904c32 Add basic PEP managemend UI to EditAccountActivity
EditAccountActivity now show own fingerprint, and gives an option to
regenerate local keying material (and wipe all sessions associated with
the old keys in the process).

It also now displays a list of other own devices, and gives an option to
remove all but the current device.
2015-07-19 22:17:55 +02:00
Andreas Straub 968410ae33 Fix devicelist update handling
No longer store own device ID (so that we don't encrypt messages for
ourselves), verify that own device ID is present in update list
(otherwise republish), reflect update in UI.
2015-07-19 21:32:27 +02:00
Andreas Straub 0cf64857cf Only cache session if successfully established
When receiving a message, only remember the XmppAxolotlSession wrapper
if the prospective session was actually established. This prevents us
from erroneously adding empty sessions that are never established using
received PreKeyWhisperMessages, which would lead to errors if we try to
use them for sending.
2015-07-19 21:32:27 +02:00
Andreas Straub 6867b5c3ab Return empty set on invalid PEP devicelist 2015-07-19 21:32:27 +02:00
Andreas Straub 25450bf6d3 Trust all IdentityKeys
The trust-on-first-use policy leads to problems when receiving messages
from two different devices of a contact before sending a message to them
(as their IdentityKeys will not have been added yet). Since session
trust will be managed externally anyway, this change is not a security
problem, and will allow us to decrypt messages from yet-untrusted
sessions.
2015-07-19 21:32:27 +02:00
Andreas Straub bf4185ac08 Refresh PEP on session establish
We now track preKeys used to establish incoming sessions with us. On
each new established session, we remove the used prekey from PEP. We
have to do this because libaxolotl-java internally clears the used
preKey from its storage, so we will not be able to establish any future
sessions using that key.
2015-07-19 21:32:27 +02:00
Andreas Straub 69600502d2 Fix asynchronous axolotl message sending
XmppConnectionService.sendMessage() now dispatches messages to the
AxolotlService, where they only are prepared for sending and cached.
AxolotlService now triggers a XmppConnectionService.resendMessage(),
which then handles sending the cached message packet.

This transparently fixes, e.g., handling of messages sent while we are
offline.
2015-07-19 21:32:27 +02:00
Andreas Straub ec6870307e Properly track message sender
Previously, the sender was assumed to be the conversation counterpart.
This broke carboned own-device messages. We now track the sender
properly, and also set the status (sent by one of the own devices vs
received from the counterpart) accordingly.
2015-07-19 21:32:27 +02:00
Andreas Straub 18c1e15d00 Rework PEP content verification
Now checks which part(s) are out of sync w/ local storage, and updates
only those, rather than assuming the entire node corrupt and
overwriting it all (especially relevant for preKey list)
2015-07-19 21:32:27 +02:00
Andreas Straub 9a0232f7e7 Formatting fixes 2015-07-19 21:32:27 +02:00
Andreas Straub 992cf5652e When receiving, add mock session if none exists
We need a session object in order to build a session from a
PreKeyWhisperMessage, so add an empty one when none exists on receiving
a message.

Warning: this will break right now if the session can not be constructed
from the received message.There will be an invalid session which will
break if we try to send using it.
2015-07-19 21:32:26 +02:00
Andreas Straub 1b0596d574 Tag messages with originating session
This can be used later in order to display trust status of messages, as
well as for potential resending of messages in case of preKey conflicts.
2015-07-19 21:32:26 +02:00
Andreas Straub 3815d4efa3 Fetch bundles on-demand, encrypt in background
Bundles are now fetched on demand when a session needs to be
established. This should lessen the chance of changes to the bundles
occuring before they're used, as well as lessen the load of fetching
bundles.

Also, the message encryption is now done in a background thread, as this
can be somewhat costly if many sessions are present. This is probably
not going to be an issue in real use, but it's good practice anyway.
2015-07-19 21:32:26 +02:00
Andreas Straub cb7980c65e Use bareJid for own session retrieval 2015-07-19 21:32:26 +02:00
Andreas Straub c1d23b2395 Migrate to new PEP layout
Merge prekeys into bundle node
2015-07-19 21:32:26 +02:00
Andreas Straub 6492801b89 Formatting fixes 2015-07-19 21:32:26 +02:00
Andreas Straub 74026b742b Save IdentityKeys in database 2015-07-19 21:32:26 +02:00
Andreas Straub 299bbdf27f Reformat code to use tabs
This really sucks to do it like this. Sorry. :(
2015-07-19 21:32:26 +02:00
Andreas Straub 77619b55e4 Added PEP and message protocol layers
Can now fetch/retrieve from PEP, as well as encode/decode messages
2015-07-19 21:32:26 +02:00
Andreas Straub f73aa1a200 Reworked axolotl protocol layer
Numerous fixes
2015-07-19 21:32:25 +02:00
Andreas Straub b8048a5538 CryptoNext persistance layer mockup
Initial sketch of the peripheral storage infrastructure for the new
axolotl-based encryption scheme.
2015-07-19 21:32:21 +02:00