function body()
{
$bytes = parent::body() . chr($this->s2k_useage);
$secret_material = NULL;
if ($this->s2k_useage == 255 || $this->s2k_useage == 254) {
$bytes .= chr($this->symmetric_algorithm);
$bytes .= $this->s2k->to_bytes();
}
if ($this->s2k_useage > 0) {
$bytes .= $this->encrypted_data;
} else {
$secret_material = '';
foreach (self::$secret_key_fields[$this->algorithm] as $f) {
$f = $this->key[$f];
$secret_material .= pack('n', OpenPGP::bitlength($f));
$secret_material .= $f;
}
$bytes .= $secret_material;
// 2-octet checksum
$chk = 0;
for ($i = 0; $i < strlen($secret_material); $i++) {
$chk = ($chk + ord($secret_material[$i])) % 65536;
}
$bytes .= pack('n', $chk);
}
return $bytes;
}
function read()
{
parent::read();
// All the fields from PublicKey
$this->s2k_useage = ord($this->read_byte());
if ($this->s2k_useage == 255 || $this->s2k_useage == 254) {
$this->symmetric_type = ord($this->read_byte());
$this->s2k_type = ord($this->read_byte());
$this->s2k_hash_algorithm = ord($this->read_byte());
if ($this->s2k_type == 1 || $this->s2k_type == 3) {
$this->s2k_salt = $this->read_bytes(8);
}
if ($this->s2k_type == 3) {
$c = ord($this->read_byte());
$this->s2k_count = (int) 16 + ($c & 15) << ($c >> 4) + 6;
}
} else {
if ($this->s2k_useage > 0) {
$this->symmetric_type = $this->s2k_useage;
}
}
if ($this->s2k_useage > 0) {
// TODO: IV of the same length as cipher's block size
$this->encrypted_data = $this->input;
// Rest of input is MPIs and checksum (encrypted)
} else {
$this->data = $this->input;
// Rest of input is MPIs and checksum
$this->key_from_data();
}
}