57 lines
1.0 KiB
Plaintext
57 lines
1.0 KiB
Plaintext
|
# Lowe's modified version of Yahalom
|
||
|
|
#
|
||
|
|
# Modelled after the description in the SPORE library
|
||
|
|
# http://www.lsv.ens-cachan.fr/spore/yahalomLowe.html
|
||
|
|
#
|
||
|
|
#
|
||
|
|
|
||
|
|
secret k : Function;
|
||
|
|
|
||
|
|
usertype SessionKey;
|
||
|
|
|
||
|
|
|
||
|
|
protocol yahalom-Lowe(I,R,S)
|
||
|
|
{
|
||
|
|
role I
|
||
|
|
{
|
||
|
|
const Ni: Nonce;
|
||
|
|
var Nr: Nonce;
|
||
|
|
var Kir: SessionKey;
|
||
|
|
|
||
|
|
send_1(I,R, I,Ni);
|
||
|
|
read_3(S,I, {R,Kir,Ni,Nr}k(I,S) );
|
||
|
|
send_5(I,R, {I, R, S, Nr}Kir );
|
||
|
|
|
||
|
|
claim_I1(I, Secret,Kir);
|
||
|
|
claim_I2(I, Nisynch);
|
||
|
|
}
|
||
|
|
|
||
|
|
role R
|
||
|
|
{
|
||
|
|
const Nr: Nonce;
|
||
|
|
var Ni: Nonce;
|
||
|
|
var Kir: SessionKey;
|
||
|
|
|
||
|
|
read_1(I,R, I,Ni);
|
||
|
|
send_2(R,S, {I,Ni,Nr}k(R,S) );
|
||
|
|
read_4(S,R, {I,Kir}k(R,S));
|
||
|
|
read_5(I,R, {I, R, S, Nr}Kir);
|
||
|
|
|
||
|
|
claim_R1(R, Secret,Kir);
|
||
|
|
claim_R2(R, Nisynch);
|
||
|
|
}
|
||
|
|
|
||
|
|
role S
|
||
|
|
{
|
||
|
|
const Kir: SessionKey;
|
||
|
|
var Ni,Nr: Nonce;
|
||
|
|
|
||
|
|
read_2(R,S, {I,Ni,Nr}k(R,S) );
|
||
|
|
send_3(S,I, {R,Kir,Ni,Nr}k(I,S));
|
||
|
|
send_4(S,R, {I,Kir}k(R,S));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
const Alice,Bob,Simon : Agent;
|
||
|
|
|