scyther/protocols/SPORE/wmf.spdl

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2006-11-21 13:42:06 +00:00
# Wide Mouthed Frog
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/wideMouthedFrog.html
#
# Note
# The name of the party that has generated a message was added in order
# to model the property described in SPORE that an agent can identify
# its own messages and will reject them.
usertype SessionKey;
usertype TimeStamp;
usertype ExpiredTimeStamp;
secret k: Function;
const Fresh: Function;
const Compromised: Function;
protocol wmf^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;
const Ti,Ts: ExpiredTimeStamp;
var I,R,S: Agent;
read_!C1(C,C, I,R,S);
send_!C2(C,C, I, {I,Ti,R,Kir}k(I,S),
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{S,Ts,I,Kir}k(R,S),
Kir
);
claim_C3(C,Empty, (Compromised,Kir));
}
}
protocol wmf(I,R,S)
{
role I
{
const Kir: SessionKey;
const Ti: TimeStamp;
var Kr: SessionKey;
send_1(I,S, I, {I, Ti, R, Kir}k(I,S));
claim_I1(I,Secret,Kir);
claim_I2(I,Empty,(Fresh,Kir));
}
role R
{
var Ts: TimeStamp;
var Kir: SessionKey;
read_2(S,R, {S, Ts, I, Kir}k(R,S) );
claim_R1(R,Secret,Kir);
claim_R2(R,Nisynch);
claim_R3(R,Empty,(Fresh,Kir));
}
role S
{
var Kir: SessionKey;
const Ts: TimeStamp;
var Ti: TimeStamp;
read_1(I,S, I,{I, Ti, R, Kir}k(I,S) );
send_2(S,R, {S, Ts, I, Kir}k(R,S));
}
}
const Alice,Bob,Eve,Simon: Agent;
const Ke: SessionKey;
const Te: TimeStamp;
untrusted Eve;
compromised k(Eve,Simon);