diff --git a/tools/fileslist.py b/tools/fileslist.py
index a11efaa..b9e7350 100755
--- a/tools/fileslist.py
+++ b/tools/fileslist.py
@@ -15,12 +15,24 @@
 # limitations under the License.
 #
 
-import operator, os, sys
+import json, hashlib, operator, os, sys
 
 def get_file_size(path):
   st = os.lstat(path)
   return st.st_size;
 
+def get_file_digest(path):
+  if os.path.isfile(path) == False:
+    return "----------------------------------------------------------------"
+  digest = hashlib.sha256()
+  with open(path, 'rb') as f:
+    while True:
+      buf = f.read(1024*1024)
+      if not buf:
+        break
+      digest.update(buf)
+  return digest.hexdigest();
+
 def main(argv):
   output = []
   roots = argv[1:]
@@ -30,16 +42,17 @@
       relative = dir[base:]
       for f in files:
         try:
-          row = (
-              get_file_size(os.path.sep.join((dir, f))),
-              os.path.sep.join((relative, f)),
-            )
+          path = os.path.sep.join((dir, f))
+          row = {
+              "Size": get_file_size(path),
+              "Name": os.path.sep.join((relative, f)),
+              "SHA256": get_file_digest(path),
+            }
           output.append(row)
         except os.error:
           pass
-  output.sort(key=operator.itemgetter(0), reverse=True)
-  for row in output:
-    print "%12d  %s" % row
+  output.sort(key=operator.itemgetter("Size", "Name"), reverse=True)
+  print json.dumps(output, indent=2, separators=(',',': '))
 
 if __name__ == '__main__':
   main(sys.argv)