Bug 494094

Summary:	Previous encrypted messages are not decrypted if they were written in other client before verifying NeoChat
Product:	[Applications] NeoChat	Reporter:	Igor Mironchik <igor.mironchik>
Component:	General	Assignee:	Tobias Fella <fella>
Status:	RESOLVED FIXED
Severity:	normal	CC:	carl
Priority:	NOR
Version First Reported In:	24.08.1
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Room settings in Element

Description Igor Mironchik 2024-10-04 09:06:21 UTC

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SUMMARY
Previous encrypted messages are not decrypted if they were written in other client before verifying NeoChat


STEPS TO REPRODUCE
1. Create encrypted room with somebody in any Matrix client before any NeoChat verifications
2. Type there messages
3. Install NeoChat and verify your devices

OBSERVED RESULT
I see all my rooms, but messages in them are encrypted and I see a text on each message: "This message is encrypted and the sender has not shared the key with this device." But, to be honest, new messages are seen on all devices.


EXPECTED RESULT
Messages should be decrypted and seen in NeoChat when device is verified.


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: KDE neon 6.0
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION

Comment 1 Tobias Fella 2024-10-04 09:08:59 UTC

Did you activate the "Never send encrypted messages to unverified sessions from this session" checkbox in element? if you do that, it won't send encryption keys to unverified sessions

Comment 2 Igor Mironchik 2024-10-04 09:35:14 UTC

Created attachment 174398 [details]
Room settings in Element

Comment 3 Igor Mironchik 2024-10-04 09:35:59 UTC

(In reply to Tobias Fella from comment #1)
> Did you activate the "Never send encrypted messages to unverified sessions
> from this session" checkbox in element? if you do that, it won't send
> encryption keys to unverified sessions

No, this option is turned off, look screenshot.

Comment 4 Tobias Fella 2024-10-10 14:20:37 UTC

NeoChat doesn't care whether it is verified or not. If messages can't be decrypted because neochat is unverified, that must be due to the sending device. That being said, my inital question was, of course, misguided: What matters is whether the sender's client is configured to only send encryption keys to verified devices, not yours. 

Your problem seems to be about messages that were sent before neochat was even logged in; decrypting those will be possible with the next release of libquotient, which is coming very soon.