scyther/gui/Protocols/ksl.spdl

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# KSL
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/ksl.html
#
#
usertype Server, SessionKey, TimeStamp, TicketKey;
usertype ExpiredTimeStamp;
const Fresh: Function;
const Compromised: Function;
protocol ksl(I,R,S)
{
role I
{
fresh Ni, Mi: Nonce;
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var Nc, Mr: Nonce;
var T: Ticket;
var Kir: SessionKey;
send_1(I,R, Ni, I);
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recv_4(R,I, { Ni,R,Kir }k(I,S), T, Nc, {Ni}Kir );
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send_5(I,R, { Nc }Kir );
send_6(I,R, Mi,T );
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recv_7(R,I, Mr,{Mi}Kir );
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send_8(I,R, {Mr}Kir );
claim_I1(I,Secret, Kir);
claim_I2(I,Niagree);
claim_I3(I,Nisynch);
claim_I4(I,Empty, (Fresh, Kir));
}
role R
{
var Ni,Mi: Nonce;
fresh Nr,Nc,Mr: Nonce;
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var Kir: SessionKey;
fresh Kbb: TicketKey;
fresh Tr: TimeStamp;
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var T: Ticket;
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recv_1(I,R, Ni, I);
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send_2(R,S, Ni, I, Nr, R );
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recv_3(S,R, { Nr, I, Kir }k(R,S), T );
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send_4(R,I, T, { Tr, I, Kir }Kbb, Nc, {Ni}Kir );
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recv_5(I,R, { Nc }Kir );
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recv_6(I,R, Mi,{ Tr, I, Kir }Kbb );
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send_7(R,I, Mr,{Mi}Kir );
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recv_8(I,R, {Mr}Kir );
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claim_R1(R,Secret, Kir);
claim_R2(R,Niagree);
claim_R3(R,Nisynch);
claim_R4(R,Empty,(Fresh,Kir));
}
role S
{
var Ni, Nr: Nonce;
fresh Kir: SessionKey;
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recv_2(R,S, Ni, I, Nr, R );
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send_3(S,R, { Nr, I, Kir }k(R,S), { Ni,R,Kir }k(I,S) );
}
}