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#!/usr/bin/env python
# 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 *
from certtools import *
try:
from precerttools import *
except ImportError:
pass
import os
import signal
import select
import zipfile
parser = argparse.ArgumentParser(description='')
parser.add_argument('baseurl', help="Base URL for CT server")
parser.add_argument('--store', default=None, metavar="dir", help='Get certificates from directory dir')
parser.add_argument('--sct-file', default=None, metavar="file", help='Store SCT:s in file')
parser.add_argument('--parallel', type=int, default=16, metavar="n", help="Number of parallel submits")
parser.add_argument('--check-sct', action='store_true', help="Check SCT signature")
parser.add_argument('--pre-warm', action='store_true', help="Wait 3 seconds after first submit")
parser.add_argument('--publickey', default=None, metavar="file", help='Public key for the CT log')
args = parser.parse_args()
from multiprocessing import Pool
baseurl = args.baseurl
certfilepath = args.store
logpublickey = get_public_key_from_file(args.publickey) if args.publickey else None
lookup_in_log = False
if certfilepath[-1] == "/":
certfiles = [certfilepath + filename for filename in sorted(os.listdir(certfilepath)) if os.path.isfile(certfilepath + filename)]
else:
certfiles = [certfilepath]
sth = get_sth(baseurl)
def submitcert((certfile, cert)):
timing = timing_point()
certchain = get_certs_from_string(cert)
precerts = get_precerts_from_string(cert)
assert len(precerts) == 0 or len(precerts) == 1
precert = precerts[0] if precerts else None
timing_point(timing, "readcerts")
try:
if precert:
if ext_key_usage_precert_signing_cert in get_ext_key_usage(certchain[0]):
issuer_key_hash = get_cert_key_hash(certchain[1])
issuer = certchain[1]
else:
issuer_key_hash = get_cert_key_hash(certchain[0])
issuer = None
cleanedcert = cleanprecert(precert, issuer=issuer)
signed_entry = pack_precert(cleanedcert, issuer_key_hash)
leafcert = cleanedcert
result = add_prechain(baseurl, {"chain":map(base64.b64encode, [precert] + certchain)})
else:
signed_entry = pack_cert(certchain[0])
leafcert = certchain[0]
issuer_key_hash = None
result = add_chain(baseurl, {"chain":map(base64.b64encode, certchain)})
except SystemExit:
print "EXIT:", certfile
select.select([], [], [], 1.0)
return (None, None)
timing_point(timing, "addchain")
if result == None:
print "ERROR for certfile", certfile
return (None, timing["deltatimes"])
try:
if args.check_sct:
check_sct_signature(baseurl, signed_entry, result, precert=precert, publickey=logpublickey)
timing_point(timing, "checksig")
except AssertionError, e:
print "ERROR:", certfile, e
return (None, None)
except urllib2.HTTPError, e:
print "ERROR:", certfile, e
return (None, None)
except ecdsa.keys.BadSignatureError, e:
print "ERROR: bad signature", certfile
return (None, None)
if lookup_in_log:
merkle_tree_leaf = pack_mtl(result["timestamp"], leafcert)
leaf_hash = get_leaf_hash(merkle_tree_leaf)
proof = get_proof_by_hash(baseurl, leaf_hash, sth["tree_size"])
leaf_index = proof["leaf_index"]
entries = get_entries(baseurl, leaf_index, leaf_index)
fetched_entry = entries["entries"][0]
print "does the leaf_input of the fetched entry match what we calculated:", \
base64.decodestring(fetched_entry["leaf_input"]) == merkle_tree_leaf
extra_data = fetched_entry["extra_data"]
certchain = decode_certificate_chain(base64.decodestring(extra_data))
submittedcertchain = certchain[1:]
for (submittedcert, fetchedcert, i) in zip(submittedcertchain,
certchain, itertools.count(1)):
print "cert", i, "in chain is the same:", submittedcert == fetchedcert
if len(certchain) == len(submittedcertchain) + 1:
last_issuer = get_cert_info(certchain[-1])["issuer"]
root_subject = get_cert_info(certchain[-1])["subject"]
print "issuer of last cert in submitted chain and " \
"subject of last cert in fetched chain is the same:", \
last_issuer == root_subject
elif len(certchain) == len(submittedcertchain):
print "cert chains are the same length"
else:
print "ERROR: fetched cert chain has length", len(certchain),
print "and submitted chain has length", len(submittedcertchain)
timing_point(timing, "lookup")
return ((leafcert, issuer_key_hash, result), timing["deltatimes"])
def get_ncerts(certfiles):
n = 0
for certfile in certfiles:
if certfile.endswith(".zip"):
zf = zipfile.ZipFile(certfile)
n += len(zf.namelist())
zf.close()
else:
n += 1
return n
def get_all_certificates(certfiles):
for certfile in certfiles:
if certfile.endswith(".zip"):
zf = zipfile.ZipFile(certfile)
for name in zf.namelist():
yield (name, zf.read(name))
zf.close()
else:
yield (certfile, open(certfile).read())
def save_sct(sct, sth, leafcert, issuer_key_hash):
sctlog = open(args.sct_file, "a")
sctentry = {"leafcert": base64.b64encode(leafcert), "sct": sct, "sth": sth}
if issuer_key_hash:
sctentry["issuer_key_hash"] = base64.b64encode(issuer_key_hash)
json.dump(sctentry, sctlog)
sctlog.write("\n")
sctlog.close()
p = Pool(args.parallel, lambda: signal.signal(signal.SIGINT, signal.SIG_IGN))
nsubmitted = 0
lastprinted = 0
print "listing certs"
ncerts = get_ncerts(certfiles)
print ncerts, "certs"
certs = get_all_certificates(certfiles)
(result, timing) = submitcert(certs.next())
if result != None:
nsubmitted += 1
(leafcert, issuer_key_hash, sct) = result
save_sct(sct, sth, leafcert, issuer_key_hash)
if args.pre_warm:
select.select([], [], [], 3.0)
starttime = datetime.datetime.now()
try:
for result, timing in p.imap_unordered(submitcert, certs):
if timing == None:
print "error"
print "submitted", nsubmitted
p.terminate()
p.join()
sys.exit(1)
if result != None:
nsubmitted += 1
(leafcert, issuer_key_hash, sct) = result
save_sct(sct, sth, leafcert, issuer_key_hash)
deltatime = datetime.datetime.now() - starttime
deltatime_f = deltatime.seconds + deltatime.microseconds / 1000000.0
rate = nsubmitted / deltatime_f
if nsubmitted > lastprinted + ncerts / 10:
print nsubmitted, "rate %.1f" % rate
lastprinted = nsubmitted
#print timing, "rate %.1f" % rate
print "submitted", nsubmitted
except KeyboardInterrupt:
p.terminate()
p.join()
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