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Thread: Retrieving public keys

  1. #1
    Join Date
    Dec 2007
    Location
    Deerfield, Massachusetts
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    281
    Distro
    Kubuntu

    Retrieving public keys

    After the latest updates I got a message from Synaptic to the effect that I was missing a public key. My research yielded the following remedy:
    Code:
    gpg --keyserver pgpkeys.mit.edu --recv-key  A8AA1FAA3F055C03
    But when I tried it, I got this:
    Code:
    gpg: requesting key 3F055C03 from hkp server pgpkeys.mit.edu
    gpgkeys: HTTP fetch error 6: Couldn't resolve host 'pgpkeys.mit.edu'
    gpg: no valid OpenPGP data found.
    gpg: Total number processed: 0
    (Same result with pgpkeys.ubuntu.org.) I encountered this problem a couple of years ago and found a solution, but I no longer remember what it was. Can anyone help?

    The answer to this belongs in some FAQ or other.

  2. #2
    Join Date
    Jun 2007
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    K-o-T,
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    Hidden!
    Distro
    Ubuntu Development Release

    Re: Retrieving public keys

    Quote Originally Posted by pwabrahams View Post
    After the latest updates I got a message from Synaptic to the effect that I was missing a public key. My research yielded the following remedy:
    Code:
    gpg --keyserver pgpkeys.mit.edu --recv-key  A8AA1FAA3F055C03
    But when I tried it, I got this:
    Code:
    gpg: requesting key 3F055C03 from hkp server pgpkeys.mit.edu
    gpgkeys: HTTP fetch error 6: Couldn't resolve host 'pgpkeys.mit.edu'
    gpg: no valid OpenPGP data found.
    gpg: Total number processed: 0
    (Same result with pgpkeys.ubuntu.org.) I encountered this problem a couple of years ago and found a solution, but I no longer remember what it was. Can anyone help?

    The answer to this belongs in some FAQ or other.

    Try a different keyserver.

    This works for me
    Code:
    gpg --keyserver hkp://subkeys.pgp.net --recv-keys A8AA1FAA3F055C03
    I tried your line from a terminal and it just sat there waiting to get the information,so I aborted it.
    The above line worked right away.

    Good Luck
    Last edited by plucky; August 3rd, 2012 at 08:55 AM. Reason: Add more info
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  3. #3
    Join Date
    Dec 2007
    Location
    Deerfield, Massachusetts
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    281
    Distro
    Kubuntu

    Same problem with your repository

    I tried this from a different computer, with these results:
    Code:
    root@pwa-K60IJ:/home/pwa# gpg --keyserver hkp://subkeys.pgp.net --recv-keys A8AA1FAA3F055C03
    gpg: requesting key 3F055C03 from hkp server subkeys.pgp.net
    ?: subkeys.pgp.net: Host not found
    gpgkeys: HTTP fetch error 7: couldn't connect: Success
    gpg: no valid OpenPGP data found.
    gpg: Total number processed: 0
    root@pwa-K60IJ:/home/pwa# gpg --keyserver pgpkeys.mit.edu --recv-key  A8AA1FAA3F055C03
    gpg: requesting key 3F055C03 from hkp server pgpkeys.mit.edu
    ?: pgpkeys.mit.edu: Host not found
    gpgkeys: HTTP fetch error 7: couldn't connect: Success
    gpg: no valid OpenPGP data found.
    gpg: Total number processed: 0
    I've concluded that the choice of server isn't the problem.

    From what I remember, the 'Host not found" message is bogus. The problem is that the host isn't seeing what it's expecting. But knowing that doesn't solve the problem.

  4. #4
    Join Date
    Dec 2007
    Location
    Deerfield, Massachusetts
    Beans
    281
    Distro
    Kubuntu

    An unsatisfying solution -- there must be a better one

    I finally bypassed the problems with retrieving the key via gpg and went to the keyserver.mit.edu website (any other keyserver website will work). I inputted the key, preceding it with 0x. I then was able to link to a keyblock. I copied the entire keyblock, including the heading and trailing lines, to a file I called launchpad. I then typed this on a superuser command line:
    Code:
    apt-key add launchpad
    The key finally got recognized.

    Part of the problem with the gpg communication, it seems, is that it works not with the standard port 80 but with a special port 11371. This port needs to be open. I opened it with
    Code:
    ufw allow 11371
    but that didn't solve the problem.

    What strikes me is that only a minority of users have this problem. For most, the usual line
    Code:
    gpg --keyserver pgpkeys.mit.edu --recv-key  A8AA1FAA3F055C03
    works correctly. Whatever the solution, it should account for this fact.

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