100 lines
1.9 KiB
Plaintext
100 lines
1.9 KiB
Plaintext
/*
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* Generalized Needham-Schroeder-Lowe protocol.
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* Four-party version.
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*
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* Cas Cremers
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* Mon May 23 11:49:29 CEST 2005
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*/
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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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protocol nslgen4(R1,R2,R3,R4)
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{
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role R1
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{
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const n1: Nonce;
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var n2,n3,n4: Nonce;
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send_1(R1,R2, {R1,R3,R4,n1}pk(R2) );
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read_4(R4,R1, {n1,n2,n3,n4,R2,R3,R4}pk(R1) );
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send_5(R1,R2, {n2,n3,n4}pk(R2) );
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claim_r1a(R1,Secret,n1);
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claim_r1b(R1,Secret,n2);
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claim_r1c(R1,Secret,n3);
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claim_r1d(R1,Secret,n4);
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claim_r1A(R1,Niagree);
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claim_r1S(R1,Nisynch);
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}
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role R2
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{
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const n2: Nonce;
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var n1,n3,n4: Nonce;
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read_1(R1,R2, {R1,R3,R4,n1}pk(R2) );
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send_2(R2,R3, {n1,n2,R1,R2,R4}pk(R3) );
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read_5(R1,R2, {n2,n3,n4}pk(R2) );
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send_6(R2,R3, {n3,n4}pk(R3) );
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claim_r2a(R2,Secret,n1);
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claim_r2b(R2,Secret,n2);
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claim_r2c(R2,Secret,n3);
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claim_r2d(R2,Secret,n4);
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claim_r2A(R2,Niagree);
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claim_r2S(R2,Nisynch);
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}
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role R3
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{
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const n3: Nonce;
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var n1,n2,n4: Nonce;
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read_2(R2,R3, {n1,n2,R1,R2,R4}pk(R3) );
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send_3(R3,R4, {n1,n2,n3,R1,R2,R3}pk(R4) );
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read_6(R2,R3, {n3,n4}pk(R3) );
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send_7(R3,R4, {n4}pk(R4) );
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claim_r3a(R3,Secret,n1);
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claim_r3b(R3,Secret,n2);
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claim_r3c(R3,Secret,n3);
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claim_r3d(R3,Secret,n4);
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claim_r3A(R3,Niagree);
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claim_r3S(R3,Nisynch);
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}
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role R4
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{
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const n4: Nonce;
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var n1,n2,n3: Nonce;
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read_3(R3,R4, {n1,n2,n3,R1,R2,R3}pk(R4) );
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send_4(R4,R1, {n1,n2,n3,n4,R2,R3,R4}pk(R1) );
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read_7(R3,R4, {n4}pk(R4) );
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claim_r4a(R4,Secret,n1);
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claim_r4b(R4,Secret,n2);
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claim_r4c(R4,Secret,n3);
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claim_r4d(R4,Secret,n4);
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claim_r4A(R4,Niagree);
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claim_r4S(R4,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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compromised sk(Eve);
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run nslgen4.R1(Agent,Agent,Agent,Agent);
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run nslgen4.R2(Agent,Agent,Agent,Agent);
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run nslgen4.R3(Agent,Agent,Agent,Agent);
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run nslgen4.R4(Agent,Agent,Agent,Agent);
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