Refactor how net/data/verify_certificate_chain_unittest/*

net/data/verify_certificate_chain_unittest/intermediate-restricts-eku-fail/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/intermediate-restricts-eku-fail/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-intermediate-restricts-eku-fail.py b/net/data/verify_certificate_chain_unittest/intermediate-restricts-eku-fail/generate-chains.py
similarity index 70%
rename from net/data/verify_certificate_chain_unittest/generate-intermediate-restricts-eku-fail.py
rename to net/data/verify_certificate_chain_unittest/intermediate-restricts-eku-fail/generate-chains.py
index 14659795c0c7e15cccb31ab4ee25312f26e26b1b..8f8eae75bfc5997acbd73cbf9525f67fe3e9ef77 100755
--- a/net/data/verify_certificate_chain_unittest/generate-intermediate-restricts-eku-fail.py
+++ b/net/data/verify_certificate_chain_unittest/intermediate-restricts-eku-fail/generate-chains.py
@@ -7,6 +7,9 @@
 restricts the EKU to clientAuth, and the target has serverAuth +
 clientAuth. Verification is expected to fail when requesting serverAuth."""
 
+import sys
+sys.path += ['..']
+
 import common
 
 # Self-signed root certificate (used as trust anchor).
@@ -22,15 +25,5 @@ target = common.create_end_entity_certificate('Target', intermediate)
 target.get_extensions().set_property('extendedKeyUsage',
                                      'serverAuth,clientAuth')
 
-chain = [target, intermediate]
-trusted = common.TrustAnchor(root, constrained=False)
-time = common.DEFAULT_TIME
-key_purpose = common.KEY_PURPOSE_SERVER_AUTH
-verify_result = False
-errors = """----- Certificate i=1 (CN=Intermediate) -----
-ERROR: The extended key usage does not include server auth
-
-"""
-
-common.write_test_file(__doc__, chain, trusted, time, key_purpose,
-                       verify_result, errors)
+chain = [target, intermediate, root]
+common.write_chain(__doc__, chain, 'chain.pem')