function rr_rdata($packet, $offset)
{
$rdata = '';
$sigdata = '';
if (strlen($this->key)) {
$key = $this->key;
$key = ereg_replace(' ', '', $key);
$key = base64_decode($key);
$newpacket = $packet;
$newoffset = $offset;
array_pop($newpacket->additional);
$newpacket->header->arcount--;
$newpacket->compnames = array();
/*
* Add the request MAC if present (used to validate responses).
*/
if (isset($this->request_mac)) {
$sigdata .= pack('H*', $this->request_mac);
}
$sigdata .= $newpacket->data();
/*
* Don't compress the record (key) name.
*/
$tmppacket = new Net_DNS_Packet();
$sigdata .= $tmppacket->dn_comp(strtolower($this->name), 0);
$sigdata .= pack('n', Net_DNS::classesbyname(strtoupper($this->class)));
$sigdata .= pack('N', $this->ttl);
/*
* Don't compress the algorithm name.
*/
$tmppacket->compnames = array();
$sigdata .= $tmppacket->dn_comp(strtolower($this->algorithm), 0);
$sigdata .= pack('nN', 0, $this->time_signed);
$sigdata .= pack('n', $this->fudge);
$sigdata .= pack('nn', $this->error, $this->other_len);
if (strlen($this->other_data)) {
$sigdata .= pack('nN', 0, $this->other_data);
}
$this->mac = mhash(MHASH_MD5, $sigdata, $key);
$this->mac_size = strlen($this->mac);
/*
* Don't compress the algorithm name.
*/
unset($tmppacket);
$tmppacket = new Net_DNS_Packet();
$rdata .= $tmppacket->dn_comp(strtolower($this->algorithm), 0);
$rdata .= pack('nN', 0, $this->time_signed);
$rdata .= pack('nn', $this->fudge, $this->mac_size);
$rdata .= $this->mac;
$rdata .= pack('nnn', $packet->header->id, $this->error, $this->other_len);
if ($this->other_data) {
$rdata .= pack('nN', 0, $this->other_data);
}
}
return $rdata;
}
