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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2014, NORDUnet A/S.
# See LICENSE for licensing information.
import argparse
import json
import base64
import urllib
import urllib2
import sys
import time
from certtools import build_merkle_tree, create_sth_signature, check_sth_signature, get_eckey_from_file
parser = argparse.ArgumentParser(description="")
parser.add_argument("--baseurl", metavar="url", help="Base URL for CT server", required=True)
parser.add_argument("--frontend", action="append", metavar="url", help="Base URL for frontend server", required=True)
parser.add_argument("--storage", action="append", metavar="url", help="Base URL for storage server", required=True)
parser.add_argument("--mergedb", metavar="dir", help="Merge database directory", required=True)
parser.add_argument("--keyfile", metavar="keyfile", help="File containing log key", required=True)
args = parser.parse_args()
ctbaseurl = args.baseurl
frontendnodes = args.frontend
storagenodes = args.storage
chainsdir = args.mergedb + "/chains"
logorderfile = args.mergedb + "/logorder"
def parselogrow(row):
return base64.b16decode(row)
def get_logorder():
f = open(logorderfile, "r")
return [parselogrow(row.rstrip()) for row in f]
def write_chain(key, value):
f = open(chainsdir + "/" + base64.b16encode(key), "w")
f.write(value)
f.close()
def read_chain(key):
f = open(chainsdir + "/" + base64.b16encode(key), "r")
value = f.read()
f.close()
return value
def add_to_logorder(key):
f = open(logorderfile, "a")
f.write(base64.b16encode(key) + "\n")
f.close()
def get_new_entries(baseurl):
try:
result = urllib2.urlopen(baseurl + "ct/storage/fetchnewentries").read()
parsed_result = json.loads(result)
if parsed_result.get(u"result") == u"ok":
return parsed_result[u"entries"]
print "ERROR: fetchnewentries", parsed_result
sys.exit(1)
except urllib2.HTTPError, e:
print "ERROR: fetchnewentries", e.read()
sys.exit(1)
def get_entry(baseurl, hash):
try:
params = urllib.urlencode({"hash":base64.b64encode(hash)})
result = urllib2.urlopen(baseurl + "ct/storage/getentry?" + params).read()
parsed_result = json.loads(result)
if parsed_result.get(u"result") == u"ok":
entries = parsed_result[u"entries"]
assert len(entries) == 1
assert base64.b64decode(entries[0]["hash"]) == hash
return base64.b64decode(entries[0]["entry"])
print "ERROR: getentry", parsed_result
sys.exit(1)
except urllib2.HTTPError, e:
print "ERROR: getentry", e.read()
sys.exit(1)
def get_curpos(baseurl):
try:
result = urllib2.urlopen(baseurl + "ct/frontend/currentposition").read()
parsed_result = json.loads(result)
if parsed_result.get(u"result") == u"ok":
return parsed_result[u"position"]
print "ERROR: currentposition", parsed_result
sys.exit(1)
except urllib2.HTTPError, e:
print "ERROR: currentposition", e.read()
sys.exit(1)
def sendlog(baseurl, submission):
try:
result = urllib2.urlopen(baseurl + "ct/frontend/sendlog",
json.dumps(submission)).read()
return json.loads(result)
except urllib2.HTTPError, e:
print "ERROR: sendlog", e.read()
sys.exit(1)
except ValueError, e:
print "==== FAILED REQUEST ===="
print submission
print "======= RESPONSE ======="
print result
print "========================"
raise e
def sendentry(baseurl, entry, hash):
try:
result = urllib2.urlopen(baseurl + "ct/frontend/sendentry",
json.dumps({"entry":base64.b64encode(entry), "treeleafhash":base64.b64encode(hash)})).read()
return json.loads(result)
except urllib2.HTTPError, e:
print "ERROR: sendentry", e.read()
sys.exit(1)
except ValueError, e:
print "==== FAILED REQUEST ===="
print hash
print "======= RESPONSE ======="
print result
print "========================"
raise e
def sendsth(baseurl, submission):
try:
result = urllib2.urlopen(baseurl + "ct/frontend/sendsth",
json.dumps(submission)).read()
return json.loads(result)
except urllib2.HTTPError, e:
print "ERROR: sendsth", e.read()
sys.exit(1)
except ValueError, e:
print "==== FAILED REQUEST ===="
print submission
print "======= RESPONSE ======="
print result
print "========================"
raise e
def get_missingentries(baseurl):
try:
result = urllib2.urlopen(baseurl + "ct/frontend/missingentries").read()
parsed_result = json.loads(result)
if parsed_result.get(u"result") == u"ok":
return parsed_result[u"entries"]
print "ERROR: missingentries", parsed_result
sys.exit(1)
except urllib2.HTTPError, e:
print "ERROR: missingentries", e.read()
sys.exit(1)
logorder = get_logorder()
certsinlog = set(logorder)
new_entries = [entry for storagenode in storagenodes for entry in get_new_entries(storagenode)]
print "adding entries"
added_entries = 0
for new_entry in new_entries:
hash = base64.b64decode(new_entry)
if hash not in certsinlog:
entry = get_entry(storagenode, hash)
write_chain(hash, entry)
add_to_logorder(hash)
logorder.append(hash)
certsinlog.add(hash)
added_entries += 1
print "added", added_entries, "entries"
tree = build_merkle_tree(logorder)
tree_size = len(logorder)
root_hash = tree[-1][0]
timestamp = int(time.time() * 1000)
privatekey = get_eckey_from_file(args.keyfile)
tree_head_signature = create_sth_signature(tree_size, timestamp,
root_hash, privatekey)
sth = {"tree_size": tree_size, "timestamp": timestamp,
"sha256_root_hash": base64.b64encode(root_hash),
"tree_head_signature": base64.b64encode(tree_head_signature)}
check_sth_signature(ctbaseurl, sth)
print "root hash", base64.b16encode(root_hash)
for frontendnode in frontendnodes:
print "distributing for node", frontendnode
curpos = get_curpos(frontendnode)
print "current position", curpos
entries = [base64.b64encode(entry) for entry in logorder[curpos:]]
sendlog(frontendnode, {"start": curpos, "hashes": entries})
print "log sent"
missingentries = get_missingentries(frontendnode)
print "missing entries:", missingentries
for missingentry in missingentries:
hash = base64.b64decode(missingentry)
sendentry(frontendnode, read_chain(hash), hash)
sendsth(frontendnode, sth)
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