55 lines
1.1 KiB
Plaintext
55 lines
1.1 KiB
Plaintext
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# Wide Mouthed Frog
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#
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# Modelled after the description in the SPORE library
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# http://www.lsv.ens-cachan.fr/spore/wideMouthedFrog.html
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#
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# Note
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# The name of the party that has generated a message was added in order
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# to model the property described in SPORE that an agent can identify
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# its own messages and will reject them.
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usertype SessionKey;
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usertype TimeStamp;
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usertype ExpiredTimeStamp;
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const Fresh: Function;
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const Compromised: Function;
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protocol wmf(I,R,S)
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{
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role I
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{
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fresh Kir: SessionKey;
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fresh Ti: TimeStamp;
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var Kr: SessionKey;
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send_1(I,S, I, {I, Ti, R, Kir}k(I,S));
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claim_I1(I,Secret,Kir);
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claim_I2(I,Empty,(Fresh,Kir));
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}
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role R
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{
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var Ts: TimeStamp;
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var Kir: SessionKey;
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read_2(S,R, {S, Ts, I, Kir}k(R,S) );
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claim_R1(R,Secret,Kir);
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claim_R2(R,Nisynch);
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claim_R3(R,Empty,(Fresh,Kir));
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}
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role S
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{
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var Kir: SessionKey;
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fresh Ts: TimeStamp;
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var Ti: TimeStamp;
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read_1(I,S, I,{I, Ti, R, Kir}k(I,S) );
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send_2(S,R, {S, Ts, I, Kir}k(R,S));
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}
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}
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