63 lines
1.3 KiB
Plaintext
63 lines
1.3 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;
|
|
|
|
const Fresh: Function;
|
|
const Compromised: Function;
|
|
|
|
protocol woolam(I,R,S)
|
|
{
|
|
role I
|
|
{
|
|
fresh 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
|
|
{
|
|
fresh 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
|
|
{
|
|
fresh 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));
|
|
}
|
|
}
|
|
|