Add scripts to generate simple test data for certificate verification.

net/data/verify_certificate_chain_unittest/generate-intermediary-unknown-non-critical-extension.py

+#!/usr/bin/python
+# Copyright (c) 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(__file__))
+import common
+
+description = """Simple certificate chain with 1 intermediary and a trusted
+root. The intermediary has an unknown X.509 extension that is marked as
+non-critical"""
+
+common.Init(__file__)
+
+# Self-signed root certificate (part of trust store).
+root = common.CreateSelfSignedRootCertificate('Root')
+intermediary = common.CreateIntermediaryCertificate('Intermediary', root)
+
+# Intermediary that has an unknown non-critical extension.
+intermediary.GetExtensions().AddProperty('1.2.3.4', 'DER:01:02:03:04')
+
+# Target certificate.
+target = common.CreateEndEntityCertificate('Target', intermediary)
+
+chain = [target, intermediary]
+trusted = [root]
+time = common.DEFAULT_TIME
+verify_result = True
+
+common.WriteTestFile(description, chain, trusted, time, verify_result)