Refactor how net/data/verify_certificate_chain_unittest/*

net/data/verify_certificate_chain_unittest/unconstrained-root-bad-eku/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/unconstrained-root-bad-eku/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-constrained-root-bad-eku.py b/net/data/verify_certificate_chain_unittest/unconstrained-root-bad-eku/generate-chains.py
similarity index 68%
rename from net/data/verify_certificate_chain_unittest/generate-constrained-root-bad-eku.py
rename to net/data/verify_certificate_chain_unittest/unconstrained-root-bad-eku/generate-chains.py
index b78eed773faf35b4e3addc508107b2cc515d63e2..e58cd0adf85794cf64afe9beb6abd185d4958bcb 100755
--- a/net/data/verify_certificate_chain_unittest/generate-constrained-root-bad-eku.py
+++ b/net/data/verify_certificate_chain_unittest/unconstrained-root-bad-eku/generate-chains.py
@@ -8,6 +8,9 @@ has an EKU that restricts it to clientAuth. Verification is expected to fail as
 the end-entity is verified for serverAuth, and the trust anchor enforces
 constraints."""
 
+import sys
+sys.path += ['..']
+
 import common
 
 # Self-signed root certificate (used as trust anchor) with non-CA basic
@@ -21,15 +24,5 @@ intermediate = common.create_intermediate_certificate('Intermediate', root)
 # Target certificate.
 target = common.create_end_entity_certificate('Target', intermediate)
 
-chain = [target, intermediate]
-trusted = common.TrustAnchor(root, constrained=True)
-time = common.DEFAULT_TIME
-key_purpose = common.KEY_PURPOSE_SERVER_AUTH
-verify_result = False
-errors = """----- Certificate i=2 (CN=Root) -----
-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')