public function verifyRsaSign(array $data, $sign) { unset($data['sign'], $data['sign_type']); $string = Security::prepareSignatureData($data); $publicKey = openssl_pkey_get_public($this->config['ali_public_key']); $result = openssl_verify($string, base64_decode($sign), $publicKey); openssl_free_key($publicKey); return $result == 1; }