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
|
/*
This file is part of GNUnet.
(C) 2012, 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
package org.gnunet.voting;
import com.google.common.collect.Maps;
import org.gnunet.mesh.Mesh;
import org.gnunet.mesh.MeshRunabout;
import org.gnunet.testbed.CompressedConfig;
import org.gnunet.util.*;
import org.gnunet.voting.messages.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.*;
/**
* Daemon that is responsible for counting votes.
*/
public class TallyAuthorityDaemon extends Program {
private static final Logger logger = LoggerFactory
.getLogger(TallyAuthorityDaemon.class);
public static final int MESH_PORT = 1002;
private Mesh mesh;
/**
* All elections known to this authority
*/
private HashMap<HashCode, ElectionState> elections = Maps.newHashMap();
/**
* State of one election.
*/
class ElectionState {
/**
* The ballot that describes this election.
*/
Ballot ballot;
/**
* Set of voters that have submitted their ballot.
*/
Set<CryptoECC.PublicSignKey> voters = new HashSet<CryptoECC.PublicSignKey>();
/**
* Maping from choice to number of votes for that choice.
*/
int[] tally;
}
private class TallyMeshReceiver extends MeshRunabout {
public void visit(SubmitMessage m) {
logger.debug("got submit message");
ElectionState electionState = elections.get(m.ballotGuid);
if (null == electionState) {
SubmitFailureMessage fm = new SubmitFailureMessage();
fm.reason = "no matching ballot found";
getSender().send(fm);
} else if (m.choiceId < 0 || m.choiceId >= electionState.tally.length) {
SubmitFailureMessage fm = new SubmitFailureMessage();
fm.reason = "invalid vote";
getSender().send(fm);
} else if (electionState.voters.contains(m.voterPub)) {
SubmitFailureMessage fm = new SubmitFailureMessage();
fm.reason = "duplicate vote detected";
getSender().send(fm);
} else if (!electionState.ballot.startTime.isDue()) {
SubmitFailureMessage fm = new SubmitFailureMessage();
fm.reason = "too early to submit vote (start "
+ electionState.ballot.startTime.toFancyString() + ", now "
+ AbsoluteTime.now().toFancyString() + ")";
getSender().send(fm);
} else if (!electionState.ballot.closingTime.isDue()) {
SubmitFailureMessage fm = new SubmitFailureMessage();
fm.reason = "too late to submit vote";
getSender().send(fm);
}
// FIXME: check signatures of voter and CA
else {
electionState.voters.add(m.voterPub);
electionState.tally[m.choiceId] += 1;
SubmitSuccessMessage sm = new SubmitSuccessMessage();
sm.voucherSig = CryptoECC.Signature.randomSignature();
getSender().send(sm);
}
getSender().receiveDone();
}
public void visit(BallotRegisterRequestMessage m) {
logger.info("ballot register requested");
CompressedConfig ccfg = new CompressedConfig(m.compressedBallotConfig);
Ballot b;
HashCode guid;
try {
b = new Ballot(ccfg.decompress());
guid = b.getBallotGuid();
} catch (InvalidBallotException e) {
BallotRegisterFailureMessage fm = new BallotRegisterFailureMessage();
fm.reason = "invalid ballot (" + e.getMessage() + ")";
getSender().send(fm);
getSender().receiveDone();
return;
}
if (elections.containsKey(guid)) {
BallotRegisterFailureMessage fm = new BallotRegisterFailureMessage();
fm.reason = "ballot with same GUID already registered";
getSender().send(fm);
} else {
ElectionState electionState = new ElectionState();
electionState.tally = new int[b.choices.size()];
electionState.ballot = b;
elections.put(guid, electionState);
BallotRegisterSuccessMessage rm = new BallotRegisterSuccessMessage();
rm.registrationSignature = CryptoECC.Signature.randomSignature();
getSender().send(rm);
}
}
public void visit(QueryMessage m) {
ElectionState electionState = elections.get(m.ballotGUID);
if (null == electionState) {
QueryFailureMessage rm = new QueryFailureMessage();
rm.reason = "no matching ballot found";
getSender().send(rm);
} else {
if (electionState.ballot.queryTime.isDue()) {
QueryResponseMessage rm = new QueryResponseMessage();
rm.results = electionState.tally;
getSender().send(rm);
} else {
QueryFailureMessage rm = new QueryFailureMessage();
rm.reason = "result query not allowed yet";
getSender().send(rm);
}
}
getSender().receiveDone();
}
}
public TallyAuthorityDaemon(String[] args) {
super(args);
}
public static void main(String[] args) {
TallyAuthorityDaemon daemon = new TallyAuthorityDaemon(args);
daemon.start();
}
@Override
public void run() {
logger.info("running tally daemon");
mesh = new Mesh(getConfiguration(), null, null, new TallyMeshReceiver(), MESH_PORT);
}
}
|
