76 lines
1.7 KiB
Plaintext
76 lines
1.7 KiB
Plaintext
# Neumann Stubblebine
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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/neumannStubblebine.html
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#
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# Note:
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# In SPORE this protocol is not described correctly, there are in fact 2
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# different protocols (the key establishment protocol and the repeated
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# authentication protocol)
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usertype Server, SessionKey, TimeStamp, TicketKey;
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usertype ExpiredTimeStamp;
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secret k: Function;
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const Fresh: Function;
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const Compromised: Function;
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const kee: SessionKey;
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protocol neustub(I,R,S)
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{
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role I
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{
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fresh Ni: Nonce;
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var Nr: Nonce;
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var T: Ticket;
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var Tb: TimeStamp;
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var Kir: SessionKey;
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send_1(I,R, I, Ni);
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recv_!3(S,I, { R,Ni,Kir,Tb}k(I,S), T, Nr);
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send_4(I,R,T,{Nr}Kir);
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send_!chain(I,R, { R,Tb,Kir }k(I,S), T);
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claim_I1(I,Secret, Kir);
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claim_I2(I,Niagree);
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claim_I3(I,Nisynch);
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claim_I4(I,Empty,(Fresh,Kir));
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}
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role R
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{
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var Ni,Mi: Nonce;
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fresh Nr,Mr: Nonce;
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var Kir: SessionKey;
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fresh Tb: TimeStamp;
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var T: Ticket;
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fresh g: Ticket;
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recv_1(I,R, I, Ni);
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send_!2(R,S, R, {I, Ni, Tb, g}k(R,S),Nr);
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recv_4(I,R,{I,Kir,Tb}k(R,S),{Nr}Kir);
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claim_R1(R,Secret, Kir);
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claim_R5(R,Secret, g);
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claim_R2(R,Niagree);
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claim_R3(R,Nisynch);
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claim_R4(R,Empty,(Fresh,Kir));
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}
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role S
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{
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var Ni, Nr: Nonce;
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fresh Kir: SessionKey;
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var Tb: TimeStamp;
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var g: Ticket;
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recv_!2(R,S, R, {I,Ni,Tb, g}k(R,S), Nr);
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send_!3(S,I, { R, Ni, Kir, Tb}k(I,S), { I,Kir,Tb}k(R,S),Nr );
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}
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}
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