65 lines
1.3 KiB
Plaintext
65 lines
1.3 KiB
Plaintext
# Woo and Lam Mutual Authentication
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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/wooLamMutual.html
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#
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usertype SessionKey;
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const Fresh: Function;
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const Compromised: Function;
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protocol woolam(I,R,S)
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{
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role I
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{
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fresh N1: Nonce;
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var Kir: SessionKey;
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var N2: Nonce;
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send_1(I,R, I, N1);
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read_2(R,I, R, N2);
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send_3(I,R, {I, R, N1, N2}k(I,S));
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read_6(R,I, {R, N1, N2, Kir}k(I,S), {N1,N2}Kir);
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send_7(I,R, {N2}Kir);
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claim_I1(I,Secret,Kir);
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claim_I2(I,Nisynch);
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claim_I3(I,Empty,(Fresh,Kir));
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}
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role R
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{
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fresh N2: Nonce;
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var N1: Nonce;
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var Kir: SessionKey;
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var T1,T2: Ticket;
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read_1(I,R, I, N1);
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send_2(R,I, R, N2);
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read_3(I,R, T1);
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send_4(R,S, T1, {I, R, N1, N2}k(R,S));
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read_5(S,R, T2, {I, N1, N2, Kir}k(R,S));
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send_6(R,I, T2, {N1,N2}Kir);
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read_7(I,R, {N2}Kir);
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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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fresh Kir: SessionKey;
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var N1,N2: Nonce;
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read_4(R,S, {I, R, N1, N2}k(I,S), {I, R, N1, N2}k(R,S));
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send_5(S,R, {R, N1, N2, Kir}k(I,S), {I, N1, N2, Kir}k(R,S));
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}
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}
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