Refactor how net/data/verify_certificate_chain_unittest/*

net/data/verify_certificate_chain_unittest/intermediate-signed-with-md5/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/intermediate-signed-with-md5/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-intermediate-signed-with-md5.py b/net/data/verify_certificate_chain_unittest/intermediate-signed-with-md5/generate-chains.py
similarity index 62%
rename from net/data/verify_certificate_chain_unittest/generate-intermediate-signed-with-md5.py
rename to net/data/verify_certificate_chain_unittest/intermediate-signed-with-md5/generate-chains.py
index a1d208c50488d4d6fdd09d99618f9202969c68f2..cfdbb1a5f2cf0bacbc45793596b66562db2a91e3 100755
--- a/net/data/verify_certificate_chain_unittest/generate-intermediate-signed-with-md5.py
+++ b/net/data/verify_certificate_chain_unittest/intermediate-signed-with-md5/generate-chains.py
@@ -7,6 +7,9 @@
 however is signed using the MD5 hash. Verification is expected to fail because
 MD5 is too weak."""
 
+import sys
+sys.path += ['..']
+
 import common
 
 # Self-signed root certificate (used as trust anchor).
@@ -19,16 +22,5 @@ intermediate.set_signature_hash('md5')
 # Target certificate.
 target = common.create_end_entity_certificate('Target', intermediate)
 
-chain = [target, intermediate]
-trusted = common.TrustAnchor(root, constrained=False)
-time = common.DEFAULT_TIME
-key_purpose = common.DEFAULT_KEY_PURPOSE
-verify_result = False
-errors = """----- Certificate i=1 (CN=Intermediate) -----
-ERROR: Unacceptable signature algorithm
-ERROR: VerifySignedData failed
-
-"""
-
-common.write_test_file(__doc__, chain, trusted, time, key_purpose,
-                       verify_result, errors)
+chain = [target, intermediate, root]
+common.write_chain(__doc__, chain, 'chain.pem')