1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
#!/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 *
from precerttools import *
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')
parser.add_argument('--cafile', default=None, metavar="file", help='File containing the CA cert')
args = parser.parse_args()
create_ssl_context(cafile=args.cafile)
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()
|
