GNU bug report logs - #20030
plstore caches invalid passphrases

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Package: emacs;

Reported by: Jonas Bernoulli <jonas <at> bernoul.li>

Date: Sat, 7 Mar 2015 14:16:02 UTC

Severity: normal

Done: Daiki Ueno <ueno <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jonas Bernoulli <jonas <at> bernoul.li>
To: <bug-gnu-emacs <at> gnu.org>
Subject: plstore caches invalid passphrases
Date: Sat, 07 Mar 2015 15:11:36 +0100

When using symmetric encryption and
`plstore-cache-passphrase-for-symmetric-encryption' is non-nil,
`plstore-passphrase-callback-function' stores the passphrase entered
by the user in `plstore-passphrase-alist'.  This happens *before* the
passphrase is used to decrypt, and if it turns out that it was wrong,
then it is *not* removed from the cache.

So if caching is turned on and the user enters the wrong passphrase,
subsequent attempts to decrypt the same information will always fail,
because the cached but invalid passphrase is used.  The user has to
manually remove the invalid entry from `plstore-passphrase-alist' to
get a second chance at entering the passphrase correctly.
This bug report was last modified 10 years and 60 days ago.

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