1 files changed, 75 insertions, 0 deletions
diff --git a/tools/fetchallcerts.py b/tools/fetchallcerts.py
new file mode 100644
index 0000000..dad5241
--- /dev/null
+++ b/tools/fetchallcerts.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2014, NORDUnet A/S.
+# See LICENSE for licensing information.
+
+import argparse
+import urllib2
+import urllib
+import json
+import base64
+import sys
+import struct
+import hashlib
+import itertools
+from certtools import *
+
+parser = argparse.ArgumentParser(description='')
+parser.add_argument('baseurl', help="Base URL for CT server")
+parser.add_argument('--store', default=None, metavar="dir", help='Store certificates in directory dir')
+args = parser.parse_args()
+
+def extract_original_entry(entry):
+    leaf_input =  base64.decodestring(entry["leaf_input"])
+    (leaf_cert, timestamp) = unpack_mtl(leaf_input)
+    extra_data = base64.decodestring(entry["extra_data"])
+    certchain = decode_certificate_chain(extra_data)
+    return [leaf_cert] + certchain
+
+def get_entries_wrapper(baseurl, start, end):
+    fetched_entries = []
+    while start + len(fetched_entries) < (end + 1):
+        print "fetching from", start + len(fetched_entries)
+        entries = get_entries(baseurl, start + len(fetched_entries), end)["entries"]
+        if len(entries) == 0:
+            break
+        fetched_entries.extend(entries)
+    return fetched_entries
+
+def print_layer(layer):
+    for entry in layer:
+        print base64.b16encode(entry)
+
+sth = get_sth(args.baseurl)
+tree_size = sth["tree_size"]
+root_hash = base64.decodestring(sth["sha256_root_hash"])
+
+print "tree size", tree_size
+print "root hash", base64.b16encode(root_hash)
+
+entries = get_entries_wrapper(args.baseurl, 0, tree_size - 1)
+
+print "fetched", len(entries), "entries"
+
+layer0 = [get_leaf_hash(base64.decodestring(entry["leaf_input"])) for entry in entries]
+
+tree = build_merkle_tree(layer0)
+
+calculated_root_hash = tree[-1][0]
+
+print "calculated root hash", base64.b16encode(calculated_root_hash)
+
+if calculated_root_hash != root_hash:
+    print "fetched root hash and calculated root hash different, aborting"
+    sys.exit(1)
+
+if args.store:
+    for entry, i in zip(entries, range(0, len(entries))):
+        chain = extract_original_entry(entry)
+        f = open(args.store + "/" + ("%06d" % i), "w")
+        for cert in chain:
+            print >> f, "-----BEGIN CERTIFICATE-----"
+            print >> f, base64.encodestring(cert).rstrip()
+            print >> f, "-----END CERTIFICATE-----"
+            print >> f, ""