76 lines
1.3 KiB
Plaintext
76 lines
1.3 KiB
Plaintext
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# SPLICE/AS
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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/spliceas.html
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#
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usertype TimeStamp, LifeTime;
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const pk: Function;
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secret sk: Function;
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inversekeys (pk,sk);
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const inc,dec: Function;
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inversekeys (inc,dec);
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protocol spliceAS(I,R,S)
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{
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role I
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{
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const N1,N2: Nonce;
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const T: TimeStamp;
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const L: LifeTime;
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send_1(I,S, I, R, N1 );
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read_2(S,I, S, {S, I, N1, pk(R)}sk(S) );
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send_3(I,R, I, R, {I, T, L, {N2}pk(R)}sk(R) );
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read_6(R,I, R, I, {R, {N2}inc}pk(I) );
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claim_7(I, Secret, N2);
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claim_9(I, Niagree);
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claim_10(I, Nisynch);
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}
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role S
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{
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var N1,N3: Nonce;
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read_1(I,S, I, R, N1 );
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send_2(S,I, S, {S, I, N1, pk(R)}sk(S) );
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read_4(R,S, R, I, N3 );
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send_5(S,R, S, {S, R, N3, pk(I)}sk(S) );
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}
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role R
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{
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const N3: Nonce;
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var N2: Nonce;
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var T: TimeStamp;
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var L: LifeTime;
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var ni: Nonce;
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const nr: Nonce;
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read_3(I,R, I, R, {I, T, L, {N2}pk(R)}sk(I) );
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send_4(R,S, R, I, N3 );
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read_5(S,R, S, {S, R, N3, pk(I)}sk(S) );
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send_6(R,I, R, I, {R, {N2}inc}pk(I) );
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claim_8(R, Secret, N2);
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claim_11(R, Niagree);
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claim_12(R, Nisynch);
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}
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}
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const Al,Bo,Eve: Agent;
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untrusted Eve;
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const ne: Nonce;
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compromised sk(Eve);
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run spliceAS.I(Agent,Agent,Agent);
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run spliceAS.R(Agent,Agent,Agent);
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run spliceAS.S(Agent,Agent,Agent);
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