test_certificate_utils.py 文件源码

def load_certificate(self, cert_name):
        # Load the raw certificate file data.
        path = os.path.join(self.cert_path, cert_name)
        with open(path, 'rb') as cert_file:
            data = cert_file.read()

        # Convert the raw certificate data into a certificate object, first
        # as a PEM-encoded certificate and, if that fails, then as a
        # DER-encoded certificate. If both fail, the certificate cannot be
        # loaded.
        try:
            return x509.load_pem_x509_certificate(data, default_backend())
        except Exception:
            try:
                return x509.load_der_x509_certificate(data, default_backend())
            except Exception:
                raise exception.SignatureVerificationError(
                    "Failed to load certificate: %s" % path
                )