Horde_Crypt_Pgp::getFingerprintsFromKey PHP Method

    public function getFingerprintsFromKey($pgpdata)
    {
        $this->_initDrivers();
        foreach ($this->_backends as $val) {
            try {
                return $val->getFingerprintsFromKey($pgpdata);
            } catch (Horde_Crypt_Exception $e) {
            }
        }
        return array();
    }

 /**
  * Returns human readable information on a PGP key.
  *
  * @param string $pgpdata  The PGP data block.
  *
  * @return string  Tabular information on the PGP key.
  * @throws Horde_Pgp_Exception
  */
 public function prettyKey($pgpdata)
 {
     $msg = '';
     $info = $this->_pgp->pgpPacketInformation($pgpdata);
     if (empty($info['signature'])) {
         return $msg;
     }
     $fingerprints = $this->_pgp->getFingerprintsFromKey($pgpdata);
     /* Making the property names the same width for all localizations .*/
     $leftrow = array(_("Name"), _("Key Type"), _("Key Creation"), _("Expiration Date"), _("Key Length"), _("Comment"), _("E-Mail"), _("Hash-Algorithm"), _("Key ID"), _("Key Fingerprint"));
     array_walk($leftrow, function (&$s, $k, $m) {
         $s .= ':' . str_repeat(' ', $m - Horde_String::length($s));
     }, max(array_map('strlen', $leftrow)) + 2);
     foreach ($info['signature'] as $uid_idx => $val) {
         if ($uid_idx == '_SIGNATURE') {
             continue;
         }
         $key = $this->_pgp->pgpPacketSignatureByUidIndex($pgpdata, $uid_idx);
         $keyid = empty($key['keyid']) ? null : $this->getKeyIdString($key['keyid']);
         $fingerprint = isset($fingerprints[$keyid]) ? $fingerprints[$keyid] : null;
         $sig_key = 'sig_' . $key['keyid'];
         $msg .= $leftrow[0] . (isset($key['name']) ? stripcslashes($key['name']) : '') . "\n" . $leftrow[1] . ($key['key_type'] == 'public_key' ? _("Public Key") : _("Private Key")) . "\n" . $leftrow[2] . strftime("%D", $val[$sig_key]['created']) . "\n" . $leftrow[3] . (empty($val[$sig_key]['expires']) ? '[' . _("Never") . ']' : strftime("%D", $val[$sig_key]['expires'])) . "\n" . $leftrow[4] . $key['key_size'] . " Bytes\n" . $leftrow[5] . (empty($key['comment']) ? '[' . _("None") . ']' : $key['comment']) . "\n" . $leftrow[6] . (empty($key['email']) ? '[' . _("None") . ']' : $key['email']) . "\n" . $leftrow[7] . (empty($key['micalg']) ? '[' . _("Unknown") . ']' : $key['micalg']) . "\n" . $leftrow[8] . (empty($keyid) ? '[' . _("Unknown") . ']' : $keyid) . "\n" . $leftrow[9] . (empty($fingerprint) ? '[' . _("Unknown") . ']' : $fingerprint) . "\n\n";
     }
     return $msg;
 }