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
|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2014-2016, NORDUnet A/S.
# See LICENSE for licensing information.
#
# Distribute the 'sth' file and all missing entries to all frontend nodes.
# See catlfish/doc/merge.txt for more about the merge process.
#
import sys
import json
import base64
import requests
from time import sleep
from base64 import b64encode, b64decode
from certtools import timing_point, \
create_ssl_context
from mergetools import get_curpos, get_logorder, chunks, get_missingentries, \
publish_sth, sendlog, sendentries, parse_args, perm, get_frontend_verifiedsize, \
frontend_verify_entries
def sendlog_helper(entries, curpos, nodename, nodeaddress, own_key, paths):
print >>sys.stderr, "sending log:",
sys.stderr.flush()
for chunk in chunks(entries, 1000):
for trynumber in range(5, 0, -1):
sendlogresult = sendlog(nodename, nodeaddress,
own_key, paths,
{"start": curpos, "hashes": chunk})
if sendlogresult == None:
if trynumber == 1:
sys.exit(1)
sleep(10)
print >>sys.stderr, "tries left:", trynumber
sys.stderr.flush()
continue
break
if sendlogresult["result"] != "ok":
print >>sys.stderr, "sendlog:", sendlogresult
sys.exit(1)
curpos += len(chunk)
print >>sys.stderr, curpos,
sys.stderr.flush()
print >>sys.stderr
print >>sys.stderr, "log sent"
sys.stderr.flush()
def fill_in_missing_entries(nodename, nodeaddress, own_key, paths, chainsdb, timing):
missingentries = get_missingentries(nodename, nodeaddress, own_key,
paths)
timing_point(timing, "get missing")
while missingentries:
print >>sys.stderr, "missing entries:", len(missingentries)
sys.stderr.flush()
sent_entries = 0
print >>sys.stderr, "sending missing entries",
sys.stderr.flush()
with requests.sessions.Session() as session:
for missingentry_chunk in chunks(missingentries, 100):
missingentry_hashes = [base64.b64decode(missingentry) for missingentry in missingentry_chunk]
hashes_and_entries = [(hash, chainsdb.get(hash)) for hash in missingentry_hashes]
sendentryresult = sendentries(nodename, nodeaddress,
own_key, paths,
hashes_and_entries, session)
if sendentryresult["result"] != "ok":
print >>sys.stderr, "sendentries:", sendentryresult
sys.exit(1)
sent_entries += len(missingentry_hashes)
print >>sys.stderr, sent_entries,
sys.stderr.flush()
print >>sys.stderr
sys.stderr.flush()
timing_point(timing, "send missing")
missingentries = get_missingentries(nodename, nodeaddress,
own_key, paths)
timing_point(timing, "get missing")
def merge_dist(args, localconfig, frontendnodes, timestamp):
maxwindow = localconfig.get("maxwindow", 1000)
paths = localconfig["paths"]
own_key = (localconfig["nodename"],
"%s/%s-private.pem" % (paths["privatekeys"],
localconfig["nodename"]))
mergedb = paths["db"]
chainsdb = perm(localconfig.get("dbbackend", "filedb"), mergedb + "/chains")
logorderfile = mergedb + "/logorder"
sthfile = mergedb + "/sth"
create_ssl_context(cafile=paths["https_cacertfile"])
timing = timing_point()
try:
sth = json.loads(open(sthfile, 'r').read())
except (IOError, ValueError):
print >>sys.stderr, "No valid STH file found in", sthfile
return timestamp
if sth['timestamp'] < timestamp:
print >>sys.stderr, "New STH file older than the previous one:", \
sth['timestamp'], "<", timestamp
return timestamp
if sth['timestamp'] == timestamp:
return timestamp
timestamp = sth['timestamp']
logorder = get_logorder(logorderfile, sth['tree_size'])
timing_point(timing, "get logorder")
for frontendnode in frontendnodes:
nodeaddress = "https://%s/" % frontendnode["address"]
nodename = frontendnode["name"]
timing = timing_point()
print >>sys.stderr, "distributing for node", nodename
sys.stderr.flush()
curpos = get_curpos(nodename, nodeaddress, own_key, paths)
timing_point(timing, "get curpos")
print >>sys.stderr, "current position", curpos
sys.stderr.flush()
verifiedsize = get_frontend_verifiedsize(nodename, nodeaddress, own_key, paths)
timing_point(timing, "get verified size")
print >>sys.stderr, "verified size", verifiedsize
assert verifiedsize >= curpos
while verifiedsize < len(logorder):
uptopos = min(verifiedsize + maxwindow, len(logorder))
entries = [b64encode(entry) for entry in logorder[verifiedsize:uptopos]]
sendlog_helper(entries, verifiedsize, nodename, nodeaddress, own_key, paths)
timing_point(timing, "sendlog")
fill_in_missing_entries(nodename, nodeaddress, own_key, paths, chainsdb, timing)
verifiedsize = frontend_verify_entries(nodename, nodeaddress, own_key, paths, uptopos)
print >>sys.stderr, "sending sth to node", nodename
sys.stderr.flush()
publishsthresult = publish_sth(nodename, nodeaddress, own_key, paths, sth)
if publishsthresult["result"] != "ok":
print >>sys.stderr, "publishsth:", publishsthresult
sys.exit(1)
timing_point(timing, "send sth")
if args.timing:
print >>sys.stderr, "timing: merge_dist:", timing["deltatimes"]
sys.stderr.flush()
return timestamp
def main():
"""
Distribute missing entries and the STH to all frontend nodes.
"""
args, config, localconfig = parse_args()
timestamp = 0
if len(args.node) == 0:
nodes = config["frontendnodes"]
else:
nodes = [n for n in config["frontendnodes"] if n["name"] in args.node]
while True:
timestamp = merge_dist(args, localconfig, nodes, timestamp)
if args.interval is None:
break
print >>sys.stderr, "sleeping", args.interval, "seconds"
sleep(args.interval)
if __name__ == '__main__':
sys.exit(main())
|
