public function onEndAttachPubkeyToUserXRD(Magicsig $magicsig, XML_XRD $xrd, Profile $target)
{
// So far we've only handled RSA keys, but it can change in the future,
// so be prepared. And remember to change the statically assigned type attribute below!
assert($magicsig->publicKey instanceof Crypt_RSA);
$xrd->links[] = new XML_XRD_Element_Link(self::REL_PUBLIC_KEY, base64_encode($magicsig->exportPublicKey()), 'RSA');
// Instead of choosing a random string, we calculate our GUID from the public key
// by fingerprint through a sha256 hash.
$xrd->links[] = new XML_XRD_Element_Link(self::REL_GUID, strtolower($magicsig->toFingerprint()));
}
