| author | Edouard Tisserant <edouard@pep-project.org> |
| Sat, 15 Oct 2016 17:45:16 +0200 | |
| changeset 1281 | efff88dcdc59 |
| parent 1236 | 991afc1aa2a1 |
| child 1297 | 78f5f9894fbd |
| permissions | -rw-r--r-- |
| vb@563 | 1 |
// DeviceGroup protocol for p≡p |
| vb@563 | 2 |
|
| vb@563 | 3 |
// Copyleft (c) 2016, p≡p foundation |
| vb@563 | 4 |
|
| vb@563 | 5 |
// Written by Volker Birk |
| vb@563 | 6 |
|
| vb@563 | 7 |
include ./fsm.yml2 |
| vb@563 | 8 |
|
| vb@563 | 9 |
protocol DeviceGroup {
|
| vb@563 | 10 |
// all messages have a timestamp, time out and are removed after timeout |
| vb@563 | 11 |
|
| vb@1047 | 12 |
broadcast sendBeacon; |
| edouard@1281 | 13 |
broadcast sendGroupUpdate; |
| vb@1097 | 14 |
unencrypted sendBeacon; |
| vb@1047 | 15 |
|
| vb@807 | 16 |
fsm DeviceState filename=sync {
|
| vb@951 | 17 |
condition storedGroupKeys(); |
| vb@951 | 18 |
condition keyElectionWon(Identity partner); |
| vb@951 | 19 |
|
| vb@624 | 20 |
state InitState {
|
| vb@624 | 21 |
on Init {
|
| vb@951 | 22 |
if storedGroupKeys() |
| vb@624 | 23 |
go Grouped; |
| vb@624 | 24 |
go Sole; |
| vb@624 | 25 |
} |
| vb@563 | 26 |
} |
| vb@563 | 27 |
|
| vb@563 | 28 |
state Sole {
|
| vb@944 | 29 |
on KeyGen // injected by generate_keypair() |
| vb@1097 | 30 |
do sendBeacon; |
| vb@563 | 31 |
on CannotDecrypt |
| vb@566 | 32 |
do sendBeacon; // cry, baby |
| Edouard@594 | 33 |
on Beacon(Identity partner) // this event will not happen for already |
| vb@571 | 34 |
// rejected partners |
| vb@582 | 35 |
do sendHandshakeRequest(partner); |
| Edouard@594 | 36 |
on HandshakeRequest(Identity partner) {
|
| vb@582 | 37 |
do sendHandshakeRequest(partner); |
| vb@563 | 38 |
go HandshakingSole(partner); |
| vb@563 | 39 |
} |
| vb@563 | 40 |
} |
| vb@563 | 41 |
|
| Edouard@594 | 42 |
state HandshakingSole(Identity partner) {
|
| vb@582 | 43 |
on Init |
| vb@563 | 44 |
do showHandshake(partner); |
| Edouard@594 | 45 |
on HandshakeRejected(Identity partner) {
|
| edouard@1161 | 46 |
do rejectHandshake(partner); // stores rejection of partner |
| vb@563 | 47 |
go Sole; |
| vb@563 | 48 |
} |
| Edouard@594 | 49 |
on HandshakeAccepted(Identity partner) {
|
| edouard@1161 | 50 |
do acceptHandshake(partner); |
| vb@567 | 51 |
if keyElectionWon(partner) { // an already existing group
|
| vb@567 | 52 |
// always wins |
| edouard@1161 | 53 |
do sendGroupKeys(partner); |
| vb@563 | 54 |
go Grouped; |
| vb@563 | 55 |
} |
| edouard@1216 | 56 |
go WaitForGroupKeysSole(Identity partner); |
| vb@563 | 57 |
} |
| vb@563 | 58 |
} |
| vb@563 | 59 |
|
| edouard@1216 | 60 |
state WaitForGroupKeysSole(Identity partner) {
|
| vb@711 | 61 |
on GroupKeys(Identity partner, Stringlist keys) {
|
| Edouard@605 | 62 |
do storeGroupKeys(partner, keys); |
| vb@563 | 63 |
go Grouped; |
| vb@563 | 64 |
} |
| vb@568 | 65 |
on Cancel go Sole; |
| Edouard@594 | 66 |
on Reject(Identity partner) {
|
| edouard@1161 | 67 |
do rejectHandshake(partner); |
| vb@569 | 68 |
go Sole; |
| vb@569 | 69 |
} |
| vb@563 | 70 |
} |
| vb@563 | 71 |
|
| vb@563 | 72 |
state Grouped {
|
| vb@563 | 73 |
on KeyGen |
| edouard@1281 | 74 |
do sendGroupUpdate; |
| edouard@1216 | 75 |
on Beacon(Identity partner) |
| edouard@1216 | 76 |
do sendHandshakeRequest(partner); |
| Edouard@594 | 77 |
on HandshakeRequest(Identity partner) {
|
| vb@582 | 78 |
do sendHandshakeRequest(partner); |
| edouard@1216 | 79 |
go HandshakingGrouped(partner); |
| edouard@1216 | 80 |
} |
| edouard@1281 | 81 |
on GroupUpdate(Identity partner, Stringlist keys) |
| edouard@1236 | 82 |
do storeGroupKeys(partner, keys); |
| edouard@1216 | 83 |
} |
| edouard@1216 | 84 |
|
| edouard@1216 | 85 |
state HandshakingGrouped(Identity partner) {
|
| edouard@1216 | 86 |
on Init |
| vb@563 | 87 |
do showHandshake(partner); |
| edouard@1216 | 88 |
on HandshakeRejected(Identity partner) {
|
| edouard@1216 | 89 |
do rejectHandshake(partner); // stores rejection of partner |
| edouard@1216 | 90 |
go Grouped; |
| vb@563 | 91 |
} |
| edouard@1216 | 92 |
on HandshakeAccepted(Identity partner) {
|
| edouard@1161 | 93 |
do acceptHandshake(partner); |
| edouard@1216 | 94 |
|
| edouard@1216 | 95 |
// an already existing group always wins |
| vb@711 | 96 |
do sendGroupKeys(partner); |
| edouard@1216 | 97 |
go Grouped; |
| edouard@1161 | 98 |
} |
| vb@563 | 99 |
} |
| edouard@1216 | 100 |
|
| Edouard@613 | 101 |
|
| vb@951 | 102 |
tag Init 1; |
| vb@951 | 103 |
tag Beacon 2; |
| vb@951 | 104 |
tag HandshakeRequest 3; |
| vb@951 | 105 |
tag GroupKeys 4; |
| Edouard@613 | 106 |
} |
| vb@563 | 107 |
} |
| vb@563 | 108 |