Rated 5 out of 5 stars

do you know ?
with kde sc 4.8 there is a new technology : ksecretservice

KSecretService is a new framework for sharing saved passwords and other credentials between a wider range of applications. KSecretService uses KDE's well-known interfaces through a Freedesktop-compliant API with other password systems, transparently for the user. KSecretService improves integration of KDE applications into other workspaces and allows 3rd party applications to plug into KDE's secure password saving system.

Perhaps this will be easier for you to develop your plugin ?

This review is for a previous version of the add-on (1.0.9).  This user has other reviews of this add-on.

Yes, I've been following KSecretService for a while, but I can't get enough information on how to connect to it, I think I will have to wait a bit, and hope that it's kwallet legacy support really works