Refactor how net/data/verify_certificate_chain_unittest/*

net/data/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-target-signed-by-512bit-rsa.py b/net/data/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py
similarity index 63%
rename from net/data/verify_certificate_chain_unittest/generate-target-signed-by-512bit-rsa.py
rename to net/data/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py
index e57026cc9787786ed0f98afb71019ff255baa987..411a831ab66faa0cda6b36ea94eb22ee24fea82f 100755
--- a/net/data/verify_certificate_chain_unittest/generate-target-signed-by-512bit-rsa.py
+++ b/net/data/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py
@@ -7,6 +7,9 @@
 certificate is signed using a weak RSA key (512-bit modulus), and so
 verification is expected to fail."""
 
+import sys
+sys.path += ['..']
+
 import common
 
 # Self-signed root certificate (used as trust anchor).
@@ -20,19 +23,5 @@ intermediate.set_key(common.get_or_generate_rsa_key(
 # 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=0 (CN=Target) -----
-ERROR: RSA modulus too small
-  actual: 512
-  minimum: 1024
-ERROR: Unacceptable modulus length for RSA key
-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')