1 files changed, 9 insertions, 0 deletions
diff --git a/tools/certtools.py b/tools/certtools.py
index ed8ab30..dfd5b24 100644
--- a/tools/certtools.py
+++ b/tools/certtools.py
@@ -15,6 +15,7 @@ import ecdsa
 import datetime
 import cStringIO
 import zipfile
+import shutil
 from certkeys import publickeys
 
 def get_cert_info(s):
@@ -734,3 +735,11 @@ def extract_original_entry(entry):
         leaf_cert = precert
     certchain = decode_certificate_chain(extra_data)
     return ([leaf_cert] + certchain, timestamp, issuer_key_hash)
+
+def mv_file(fromfn, tofn):
+    shutil.move(fromfn, tofn)
+
+def write_file(fn, sth):
+    tempname = fn + ".new"
+    open(tempname, 'w').write(json.dumps(sth))
+    mv_file(tempname, fn)