Initial commit

- cpisign.py
   - initial work and logic by Wei-Yu
   - converted to use python cryptography (stable API) instead of
      OpenSSL by Zack)
- Basic lint, license tests

Change-Id: I05e9c0fbce339fc3bd187120174dcfde0299852f
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..af3bea8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+
+venv_cbrs
+*.p12