/**
* Decode a string representation of an RSA public key or keypair
* as a Magicsig object which can be used to sign or verify.
*
* @param string $text
* @return Magicsig
*/
public static function fromString($text)
{
$magic_sig = new Magicsig();
// remove whitespace
$text = preg_replace('/\\s+/', '', $text);
// parse components
if (!preg_match('/RSA\\.([^\\.]+)\\.([^\\.]+)(.([^\\.]+))?/', $text, $matches)) {
return false;
}
$mod = $matches[1];
$exp = $matches[2];
if (!empty($matches[4])) {
$private_exp = $matches[4];
} else {
$private_exp = false;
}
$magic_sig->loadKey($mod, $exp, 'public');
if ($private_exp) {
$magic_sig->loadKey($mod, $private_exp, 'private');
}
return $magic_sig;
}
