Repository Key Refresh

We screwed up and let our debian repository key expire. The responsible parties have been punished (no more free back rubs). You have three options to fix:

option 1 - blindly upgrade

You can just ignore the warnings about the packages being unauthenticated. This will upgrade your leap-keyring package, which includes the updated key. This is potentially dangerious and should be avoided.

apt-get update --allow-unauthenticated
apt-get upgrade --allow-unauthenticated

option 2 - re-add key without checking fingerprint

You can simply re-import the key to your apt keyring. This method is less dangerious, but requires you to trust the certificate authority system (which never a good idea).

curl | apt-key add -

option 3 - update the key from keyserver

With this method, we update the key by pulling it from a keyserver and then importing to apt-key. This method is the most secure (so long as you follow all the steps and actually verify the fingerprint).

Find the long key-id of the current LEAP archive signing key:

apt-key adv --list-keys --keyid-format 0xLONG

You should see this among the output:

pub   4096R/0x1E34A1828E207901 2013-02-06 [expired: 2014-02-06]
uid                            LEAP archive signing key 

Now, grab that specific key-id from a keyserver, and verify the fingerprint:

gpg --recv-key 0x1E34A1828E207901
gpg --fingerprint 0x1E34A1828E207901

You should see this as output:

pub   4096R/8E207901 2013-02-06 [expires: 2015-02-07]
      Key fingerprint = 1E45 3B2C E87B EE2F 7DFE  9966 1E34 A182 8E20 7901
uid                  LEAP archive signing key 

Make sure that the fingerprint in this output matches the long key-id you listed with apt-key. Without this step, it would be very easy for an attacker to feed you a bogus key.

Finally, import the key into apt-key:

gpg --armor --export 0x1E34A1828E207901  | sudo apt-key add -