Re: gpg-agent: error accessing card: Conflicting use

2015-11-20 Thread the2nd

Hi,

now i have the same problem on my ubuntu installation at work. I've 
updated to ubuntu 15.10 and now it happens from time to time just like 
on my sabayon installation. But as i dont use the OTP feature of the 
yubikey at work i can say for sure that the problem exists without 
pressing the yubikey button. Also it happens without yubikey pull out 
and it is not related to my yubikey because a colleague of mine has the 
same problem after upgrading to ubuntu 15.10.


GPG version is 1.4.18.

Any help is appreciated.

regards
the2nd

On 2015-08-11 20:10, the...@otpme.org wrote:

Hi again :)

nobody else with this problem?



On 2015-05-30 14:25, the...@otpme.org wrote:

Hi,

i have a problem with gpg-agent when using it with a yubikey neo.
after some time gpg-agent refuses to sign any data and so any ssh
login with my key stored on the yubikey will fail. the gpg-agent log
shows the following messages:

2015-05-30 13:49:36 gpg-agent[3600] error accessing card: Conflicting 
use
2015-05-30 13:49:36 gpg-agent[3600] smartcard signing failed: 
Conflicting use

2015-05-30 13:49:38 gpg-agent[3600] error getting default
authentication keyID of card: Conflicting use

the command to start gpg-agent on KDE login is:
eval "$(/usr/bin/gpg-agent --daemon --enable-ssh-support --log-file
~/.gnupg/gpg-agent.log)"

i haven't found the exact circumstances when it happens but its more
likely to happen when the yubikey was plugged off and re-inserted, but
it also happens without pull off from time to time. a restart of
gpg-agent fixes the issue. it also often happens after i've pressed
the yubikey button to generate an OTP but not always.

gnupg version is 2.0.27-r1 running on sabayon linux.

when using the same yubikey on my ubuntu 14.04 notebook at work i
never had this problem.

thanks for any help.

regards
the2nd


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Re: gpg-agent: error accessing card: Conflicting use

2015-10-25 Thread Jan-Philipp Litza
Hi everybody,

I'm having the same problem and found the following steps to reproduce:

0. Configure your Yubikey NEO to eject the card on button press:
   ykneomgr -M81
   Re-plug it afterwards!
1. Insert the Yubikey and press button to insert the (virtual) card
2. Use the authentication key stored on the card to log in to a SSH host
3. Press button to remove the (virtual) card
   (or wait if you have a timeout for auto-eject configured)
4. Press button to insert the (virtual) card again
5. Do anything that requires the card (e.g. gpg -d)
   gpg: public key decryption failed: Conflicting use

Instead of having the SSH session still open, it suffices to have a
persistent connection (ControlPersist ssh config option). Apparently,
even an authenticated SSH session somehow still uses the agent (even
without agent forwarding configured), and if the card was removed and
re-inserted, this somehow blocks its usage.

So instead of restarting the gpg-agent, you can also kill all open ssh
sessions.

Best regards,
Jan-Philipp Litza



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Re: gpg-agent: error accessing card: Conflicting use

2015-08-14 Thread Marcel van der Boom

 [the...@otpme.org:]  nobody else with this problem?


Yes, I have this problem with some regularity. I have been restarting
gpg-agent so far to resolve it and haven't investigated further.

I'm not sure exactly when this started, may have been around a 2.1
upgrade.

marcel

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