73 lines
1.5 KiB
Plaintext
73 lines
1.5 KiB
Plaintext
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# Andrew Secure RPC
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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/andrew.html
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#
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# Note:
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# The shared key between I and R is modelled as k(I,R) currently
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# there is no way to express that this key is equal to k(R,I)
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# So it is possile that certain attacks that use this property are not found
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#
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usertype SessionKey;
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secret k: Function;
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const succ: Function;
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protocol andrew(I,R)
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{
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role I
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{
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const ni: Nonce;
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var nr,nr2: Nonce;
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var kir: SessionKey;
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send_1(I,R, I,{ni}k(I,R) );
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read_2(R,I, {succ(ni),nr}k(I,R) );
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send_3(I,R, {succ(nr)}k(I,R) );
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read_4(R,I, {kir,nr2}k(I,R) );
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claim_5(I,Secret,kir);
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claim_6(I,Nisynch);
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}
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role R
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{
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var ni: Nonce;
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const nr,nr2: Nonce;
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const kir: SessionKey;
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read_1(I,R, I,{ni}k(I,R) );
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send_2(R,I, {succ(ni),nr}k(I,R) );
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read_3(I,R, {succ(nr)}k(I,R) );
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send_4(R,I, {kir,nr2}k(I,R) );
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claim_7(R,Secret,kir);
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claim_8(R,Nisynch);
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}
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}
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const Alice,Bob,Eve: Agent;
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untrusted Eve;
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const ne: Nonce;
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const kee: SessionKey;
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compromised k(Eve,Eve);
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compromised k(Eve,Alice);
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compromised k(Eve,Bob);
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compromised k(Alice,Eve);
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compromised k(Bob,Eve);
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# This scenario should recreate the first attack in SPORE when running
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# scyther in model checker mode
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#run andrew.I(Alice,Bob);
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#run andrew.R(Alice,Bob);
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#run andrew.I(Alice,Bob);
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#run andrew.R(Alice,Bob);
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# General scenario, 2 parallel runs of the protocol
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run andrew.I(Agent,Agent);
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run andrew.R(Agent,Agent);
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run andrew.I(Agent,Agent);
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run andrew.R(Agent,Agent);
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