crypto.py 文件源码

def from_primitive(cls, pem_string, session=None):
        result = cls(session=session)
        try:
            return result.from_raw_key(x509.load_pem_x509_certificate(
                utils.SmartStr(pem_string), backend=openssl.backend))
        except (TypeError, ValueError, exceptions.UnsupportedAlgorithm) as e:
            raise CipherError("X509 Certificate invalid: %s" % e)
        return result