scyther/gui/Protocols/woo-lam.spdl

75 lines
1.5 KiB
Plaintext

# Woo and Lam Mutual Authentication
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/wooLamMutual.html
#
usertype SessionKey;
secret k: Function;
const Fresh: Function;
const Compromised: Function;
protocol woolam(I,R,S)
{
role I
{
const N1: Nonce;
var Kir: SessionKey;
var N2: Nonce;
send_1(I,R, I, N1);
read_2(R,I, R, N2);
send_3(I,R, {I, R, N1, N2}k(I,S));
read_6(R,I, {R, N1, N2, Kir}k(I,S), {N1,N2}Kir);
send_7(I,R, {N2}Kir);
claim_I1(I,Secret,Kir);
claim_I2(I,Nisynch);
claim_I3(I,Empty,(Fresh,Kir));
}
role R
{
const N2: Nonce;
var N1: Nonce;
var Kir: SessionKey;
var T1,T2: Ticket;
read_1(I,R, I, N1);
send_2(R,I, R, N2);
read_3(I,R, T1);
send_4(R,S, T1, {I, R, N1, N2}k(R,S));
read_5(S,R, T2, {I, N1, N2, Kir}k(R,S));
send_6(R,I, T2, {N1,N2}Kir);
read_7(I,R, {N2}Kir);
claim_R1(R,Secret,Kir);
claim_R2(R,Nisynch);
claim_R3(R,Empty,(Fresh,Kir));
}
role S
{
const Kir: SessionKey;
var N1,N2: Nonce;
read_4(R,S, {I, R, N1, N2}k(I,S), {I, R, N1, N2}k(R,S));
send_5(S,R, {R, N1, N2, Kir}k(I,S), {I, N1, N2, Kir}k(R,S));
}
}
const Alice,Bob,Eve,Simon: Agent;
const Ke: SessionKey;
const Te: Ticket;
const Ne: Nonce;
untrusted Eve;
compromised k(Eve,Simon);