/**
* Generate ASN.1 structure.
*
* @return Sequence
*/
public function toASN1()
{
$elements = array(new Integer($this->_version), $this->_subject->toASN1(), $this->_subjectPKInfo->toASN1());
if (isset($this->_attributes)) {
$elements[] = new ImplicitlyTaggedType(0, $this->_attributes->toASN1());
}
return new Sequence(...$elements);
}
/**
* Generate ASN.1 structure.
*
* @return Sequence
*/
public function toASN1()
{
$elements = array();
$version = $this->version();
// if version is not default
if ($version != self::VERSION_1) {
$elements[] = new ExplicitlyTaggedType(0, new Integer($version));
}
$serial = $this->serialNumber();
$signature = $this->signature();
// add required elements
array_push($elements, new Integer($serial), $signature->toASN1(), $this->_issuer->toASN1(), $this->_validity->toASN1(), $this->_subject->toASN1(), $this->_subjectPublicKeyInfo->toASN1());
if (isset($this->_issuerUniqueID)) {
$elements[] = new ImplicitlyTaggedType(1, $this->_issuerUniqueID->toASN1());
}
if (isset($this->_subjectUniqueID)) {
$elements[] = new ImplicitlyTaggedType(2, $this->_subjectUniqueID->toASN1());
}
if (count($this->_extensions)) {
$elements[] = new ExplicitlyTaggedType(3, $this->_extensions->toASN1());
}
return new Sequence(...$elements);
}
protected function _choiceASN1()
{
// Name type is itself a CHOICE, so explicit tagging must be
// employed to avoid ambiguities
return new ExplicitlyTaggedType($this->_tag, $this->_dn->toASN1());
}
