function toKey()
{
switch ($this->components['kty']) {
case 'RSA':
$rsa = new Crypt_RSA();
$n = new Math_BigInteger('0x' . bin2hex(JOSE_URLSafeBase64::decode($this->components['n'])), 16);
$e = new Math_BigInteger('0x' . bin2hex(JOSE_URLSafeBase64::decode($this->components['e'])), 16);
if (array_key_exists('d', $this->components)) {
throw new JOSE_Exception_UnexpectedAlgorithm('RSA private key isn\'t supported');
} else {
$pem_string = $rsa->_convertPublicKey($n, $e);
}
$rsa->loadKey($pem_string);
return $rsa;
default:
throw new JOSE_Exception_UnexpectedAlgorithm('Unknown key type');
}
}
/**
* @param \Math_BigInteger $n
* @param \Math_BigInteger $e
* @return RSAPublicKey
*/
public function buildPublicKey(\Math_BigInteger $n, \Math_BigInteger $e)
{
$public_key_pem = $this->rsa_imp->_convertPublicKey($n, $e);
return new _RSAPublicKeyPEMFornat($public_key_pem);
}
