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https://git.reviewboard.kde.org/r/125641/
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Review request for KDE Frameworks.


Repository: kwallet


Description
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A use-case: kwallet gets locked with lockscreen, eg. on Plasma Mobile, 
unlocking the screen would also unlock kwallet through PAM.

Another use-case: automatic login that shows lockscreen after booting, 
unlocking that session would also unlock kwallet through PAM.

This requires a small change in kwallet-pam.

Now to the patch itself. When a user authenticates via lockscreen, PAM can 
start the kwalletd process and pass the auth hash token to it. In case the 
kwalletd process is already running, this patch would check if the wallet is 
opened and if not, it would pass the PAM hash token over dbus to the running 
kwallet instance which would unlock the running wallet. If it is unlocked, 
nothing would happen.

I originally didn't want to pass it over dbus, but in the end it doesn't matter 
because as soon as the session is unlocked (at this point the hash is sent), 
the wallet would be unlocked and a possible attacker would have access to its 
data anyway. But I'm open to suggestions on improvements.


Diffs
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  src/runtime/kwalletd/main.cpp fbab58d 

Diff: https://git.reviewboard.kde.org/r/125641/diff/


Testing
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I've created a special PAM profile which has

auth   optional        pam_kwallet5.so lockscreen 
kwalletd=/opt/kde5/bin/kwalletd5

ran kcheckpass -c myprofile and kwallet5 got started and unlocked. Then I 
locked the wallet using kwalletmanager5, ran kcheckpass -c myprofile again and 
the running kwallet5 instance got unlocked.


Thanks,

Martin Klapetek

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