From db418ce9f59dc2e2861fd7b2398f94c4faf509e9 Mon Sep 17 00:00:00 2001
From: Magnus Ahltorp <map@kth.se>
Date: Sun, 22 Feb 2015 00:35:24 +0100
Subject: Added tool for drawing merkle trees and extracting node hashes

---
 tools/treeinfo.py | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100755 tools/treeinfo.py

(limited to 'tools')

diff --git a/tools/treeinfo.py b/tools/treeinfo.py
new file mode 100755
index 0000000..036aeb2
--- /dev/null
+++ b/tools/treeinfo.py
@@ -0,0 +1,123 @@
+#!/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 *
+import zipfile
+import os
+import time
+
+parser = argparse.ArgumentParser(description='')
+parser.add_argument('--store', default=None, metavar="dir", help='Certificates directory')
+
+parser.add_argument('--head', action='store_true', help="Calculate tree head")
+parser.add_argument('--printnode', action='store_true', help="Print tree node")
+
+parser.add_argument('--treesize', type=int, default=None, metavar="treesize", help="Tree size")
+parser.add_argument('--level', type=int, default=None, metavar="level", help="Level")
+parser.add_argument('--index', type=int, default=None, metavar="index", help="Index")
+
+parser.add_argument('--follow', action='store_true', help="Follow upwards")
+
+parser.add_argument('--dot', default=None, metavar="file", help='Output data in dot format')
+
+args = parser.parse_args()
+
+def index_to_root(index, treesize, level=0):
+    path = (index, level)
+    height = merkle_height(treesize)
+    nodes = []
+    while node_level(path) < height:
+        nodes.append(path)
+        path = node_above(path)
+    return nodes
+
+def set_tree_node(tree, level, index, value, overwrite=True):
+    if not overwrite and index in levels.setdefault(level, {}):
+        return
+    levels.setdefault(level, {})[index] = value
+
+def draw_path(tree, startlevel, startindex, treesize, colors):
+    height = merkle_height(treesize)
+    nodes = index_to_root(startindex, treesize, level=startlevel)
+
+    for (index, level) in nodes:
+        if level == 0:
+            set_tree_node(tree, level, index, colors[0])
+        else:
+            set_tree_node(tree, level, index, colors[1])
+        index ^= 1
+        levelsize = 2 ** level
+        firstleaf = index * levelsize
+        if firstleaf < treesize:
+            set_tree_node(tree, level, index, "", overwrite=False)
+    set_tree_node(tree, height, 0, colors[1])
+    
+
+if args.head:
+    treehead = get_tree_head(args.store, args.treesize)
+    print base64.b16encode(treehead)
+elif args.dot:
+    levels = {}
+    if args.index >= args.treesize:
+        sys.exit(1)
+    dotfile = open(args.dot, "w")
+    print >>dotfile, 'graph "" {'
+    print >>dotfile, 'ordering=out;'
+    print >>dotfile, 'node [style=filled];'
+
+    height = merkle_height(args.treesize)
+
+    draw_path(levels, 0, args.treesize - 1, args.treesize, ["0.600 0.500 0.900", "0.600 0.300 0.900"])
+
+    draw_path(levels, args.level, args.index, args.treesize, ["0.300 0.500 0.900", "0.300 0.200 0.900"])
+
+    for l in sorted(levels.keys(), reverse=True):
+        for i in sorted(levels[l].keys()):
+            print >>dotfile, "l%di%d [color=\"%s\" label=\"%s\"];" % (l, i, levels[l][i], path_as_string(i, l, args.treesize))
+            if height != l:
+                print >>dotfile, "l%di%d -- l%di%d;" % (l + 1, i / 2, l, i)
+                if i & 1 == 0:
+                    print >>dotfile, "ml%di%d [shape=point style=invis];" % (l, i)
+                    print >>dotfile, "l%di%d -- ml%di%d [weight=100 style=invis];" % (l + 1, i / 2, l, i)
+    print >>dotfile, "}"
+    dotfile.close()
+elif args.printnode:
+    index = args.index
+    level = args.level
+    if args.index >= args.treesize:
+        sys.exit(1)
+    height = merkle_height(args.treesize)
+    nodes = index_to_root(index, args.treesize, level=level)
+
+    for (index, level) in nodes:
+        print level, index
+        if args.store:
+            print base64.b16encode(get_intermediate_hash(args.store, args.treesize, level, index))
+
+        if not args.follow:
+            sys.exit(0)
+
+        index ^= 1
+        levelsize = 2 ** level
+
+        firstleaf = index * levelsize
+        if firstleaf < args.treesize:
+            print level, index
+            if args.store:
+                print base64.b16encode(get_intermediate_hash(args.store, args.treesize, level, index))
+
+    print height, 0
+    if args.store:
+        print base64.b16encode(get_intermediate_hash(args.store, args.treesize, height, 0))
-- 
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