# TMN
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/tmn.html
#

usertype Key;

const pk: Function;
secret sk: Function;
inversekeys(pk,sk);

protocol tmn(I,R,S)
{
	role I
	{
		const Ki: Key;
		var Kr: Key;

		send_1(I,S, R,{Ki}pk(S) );
		read_4(S,I, R,{Kr}Ki );

		claim_I1(I,Secret,Ki);
		claim_I2(I,Secret,Kr);
	}	
	
	role R
	{
		const Kr: Key;

		read_2(S,R, I );
		send_3(R,S, I, { Kr }pk(S) );

		claim_R1(R,Secret,Kr);
	}

	role S
	{
		var Ki,Kr: Key;

		read_1(I,S, R,{Ki}pk(S) );
		send_2(S,R, I );
		read_3(R,S, I, { Kr }pk(S) );
		send_4(S,I, R,{Kr}Ki );
	}
}

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


untrusted Eve;
compromised sk(Eve);

# Scenario to recreate an attack in SPORE
#run tmn.I (Alice,Bob,Simon);
#run tmn.R (Alice,Bob,Simon);
#run tmn.S (Alice,Bob,Simon);

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