From 3a8bf3ccf46eb6b4cbb26d9cce7dd1c31485cc9d Mon Sep 17 00:00:00 2001
From: Linus Nordberg <linus@nordu.net>
Date: Mon, 5 Dec 2016 00:22:32 +0100
Subject: initlog.py: Consult 'logorder'; Create chainsdb.

---
 tools/initlog.py | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/tools/initlog.py b/tools/initlog.py
index 270ebc5..3e7ed58 100755
--- a/tools/initlog.py
+++ b/tools/initlog.py
@@ -16,7 +16,7 @@ from time import time
 from base64 import b64encode
 from certtools import build_merkle_tree, generate_tree_head_signature, \
      write_file
-from mergetools import get_sth
+from mergetools import get_sth, perm, get_logorder
 
 def parse_args():
     parser = argparse.ArgumentParser(description="")
@@ -33,6 +33,11 @@ def parse_args():
 
 def main():
     """
+    Initialise a log by creating
+    - sth file
+      - must not exist before
+      - consulting 'logorder' if it exists
+    - perm database if it doesn't exist
     """
     args, config, localconfig = parse_args()
     signingnodes = config["signingnodes"]
@@ -41,8 +46,10 @@ def main():
                "%s/%s-private.pem" % (paths["privatekeys"],
                                       localconfig["nodename"]))
     mergedb = paths["mergedb"]
+    logorderfile = mergedb + "/logorder"
     sthfile = mergedb + "/sth"
 
+    # Don't do anything if there's already an sth file.
     sth = get_sth(sthfile)
     if sth['tree_size'] >= 0:
         print >>sys.stderr, \
@@ -50,6 +57,7 @@ def main():
         print >>sys.stderr, "I refuse to destroy this log."
         return 1
 
+    # Ensure that we can find our keyfile.
     try:
         os.stat(own_key[1])
     except OSError, e:
@@ -58,20 +66,34 @@ def main():
             return 1
         raise
 
+    # Create a chains database.
+    chainsdb = perm(localconfig.get("dbbackend", "filedb"), mergedb + "/chains")
+
+    # Create sth file.
     tree_size = 0
-    timestamp = int(time() * 1000)
     root_hash = build_merkle_tree('')[-1][0]
+    try:
+        logorder = get_logorder(logorderfile)
+        tree_size = len(logorder)
+        root_hash = build_merkle_tree(logorder[:tree_size])[-1][0]
+    except IOError, e:
+        if e.errno == errno.ENOENT:
+            pass
+    timestamp = int(time() * 1000)
     tree_head_signature = \
       generate_tree_head_signature(signingnodes, own_key,
                                    tree_size, timestamp, root_hash)
     if tree_head_signature == None:
         return 1
 
-    sth = {"tree_size": 0,
+    sth = {"tree_size": tree_size,
            "timestamp": timestamp,
            "sha256_root_hash": b64encode(root_hash),
            "tree_head_signature": b64encode(tree_head_signature)}
 
+    print "Creating sth file with tree size", tree_size, \
+      "and timestamp", timestamp
+
     write_file(sthfile, sth)
     return 0
 
-- 
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