0f54f2ed23
SPORE:
- pk is not known to all agents, only pk(Simon) is known
- Use new naming convention:
- Protocol name starting with an @ means internal protocol
- For non internal protocols naming is as follows:
protocolname-variant^subprotocol
For example: yahalom-Lowe^KeyCompromise meaning the key compromise sub
protocol of the Lowe variant of the Yahalom protocol.
102 lines
2.3 KiB
Plaintext
102 lines
2.3 KiB
Plaintext
# Kao Chow Authentication v.1
|
|
#
|
|
# Modelled after the description in the SPORE library
|
|
# http://www.lsv.ens-cachan.fr/spore/kaoChow1.html
|
|
#
|
|
# Note:
|
|
# This protocol uses a ticket so scyther will only be able to verify
|
|
# the protocol using the ARACHNE engine (-a)
|
|
#
|
|
|
|
usertype SessionKey;
|
|
secret k: Function;
|
|
const Fresh: Function;
|
|
const Compromised: Function;
|
|
|
|
protocol kaochow^KeyCompromise(C)
|
|
{
|
|
// Read the names of 3 agents and disclose a session between them including
|
|
// corresponding session key to simulate key compromise
|
|
role C {
|
|
const Ni,Nr: Nonce;
|
|
const Kir: SessionKey;
|
|
var I,R,S: Agent;
|
|
|
|
read_C1(C,C, I,R,S);
|
|
send_C2(C,C, (I,R,Ni),
|
|
{I,R,Ni,Kir}k(I,S),
|
|
{I,R,Ni,Kir}k(R,S),
|
|
{Ni}Kir, Nr,
|
|
{Nr}Kir,
|
|
Kir
|
|
);
|
|
claim_C3(C,Empty, (Compromised,Kir));
|
|
}
|
|
}
|
|
|
|
protocol kaochow(I,R,S)
|
|
{
|
|
role I
|
|
{
|
|
const ni: Nonce;
|
|
var nr: Nonce;
|
|
var kir: SessionKey;
|
|
|
|
send_1 (I,S, I,R,ni);
|
|
read_3 (R,I, {I,R,ni,kir}k(I,S), {ni}kir, nr );
|
|
send_4 (I,R, {nr}kir );
|
|
|
|
claim_I1 (I, Nisynch);
|
|
claim_I2 (I, Niagree);
|
|
claim_I3 (I, Secret, kir);
|
|
claim_I4 (I, Empty, (Fresh,kir));
|
|
}
|
|
|
|
role R
|
|
{
|
|
var ni: Nonce;
|
|
const nr: Nonce;
|
|
var kir: SessionKey;
|
|
var T;
|
|
|
|
read_2 (S,R, T, { I,R,ni,kir }k(R,S) );
|
|
send_3 (R,I, T, {ni}kir, nr );
|
|
read_4 (I,R, {nr}kir );
|
|
|
|
claim_R1 (R, Nisynch);
|
|
claim_R2 (R, Niagree);
|
|
claim_R3 (R, Secret, kir);
|
|
claim_R4 (R, Empty, (Fresh,kir));
|
|
}
|
|
|
|
role S
|
|
{
|
|
var ni: Nonce;
|
|
const kir: SessionKey;
|
|
|
|
read_1 (I,S, I,R,ni);
|
|
send_2 (S,R, {I,R,ni,kir}k(I,S), { I,R,ni,kir }k(R,S) );
|
|
}
|
|
}
|
|
|
|
const Alice,Bob,Simon,Eve: Agent;
|
|
|
|
untrusted Eve;
|
|
const ne: Nonce;
|
|
const te: Ticket;
|
|
const ke: SessionKey;
|
|
compromised k(Eve,Eve);
|
|
compromised k(Eve,Alice);
|
|
compromised k(Eve,Bob);
|
|
compromised k(Eve,Simon);
|
|
compromised k(Alice,Eve);
|
|
compromised k(Bob,Eve);
|
|
compromised k(Simon,Eve);
|
|
|
|
run kaochow.I(Agent,Agent,Simon);
|
|
run kaochow.R(Agent,Agent,Simon);
|
|
run kaochow.S(Agent,Agent,Simon);
|
|
run kaochow.I(Agent,Agent,Simon);
|
|
run kaochow.R(Agent,Agent,Simon);
|
|
run kaochow.S(Agent,Agent,Simon);
|