# Wide Mouthed Frog
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/wideMouthedFrog.html
#

usertype Key;
usertype TimeStamp;

secret k: Function;

protocol wmf(I,R,S)
{
	role I
	{
		const Kir: Key;
        const Ti: TimeStamp;
		var Kr: Key;

		send_1(I,S, I, {Ti, R, Kir}k(I,S)); 

		claim_I1(I,Secret,Kir);
	}	
	
	role R
	{
        var Ts: TimeStamp;
        var Kir: Key;

		read_2(S,R, {Ts, I, Kir}k(R,S) );

		claim_R1(R,Secret,Kir);
        claim_R2(R,Nisynch);
	}

	role S
	{
		var Kir: Key;
        const Ts: TimeStamp;
        var Ti: TimeStamp;

		read_1(I,S, I,{Ti, R, Kir}k(I,S) );
        send_2(S,R, {Ts, I, Kir}k(R,S));
	}
}

const Alice,Bob,Eve,Simon: Agent;
const Ke: Key;
const Te: TimeStamp;


untrusted Eve;
compromised k(Eve,Simon);

run wmf.I (Agent,Agent,Simon);
run wmf.R (Agent,Agent,Simon);
run wmf.S (Agent,Agent,Simon);