102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
/**********************************************************************
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* @protocol Internet Key Exchange Protocol (IKEv1)
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* @reference RFC 2409,
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* Boyd C. and Mathuria A., Protocols for Authentication
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* and Key Agreement
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* @variant Pre-shared key authentication (main mode) incorporating
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* a fix by Perlman et. al.
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**********************************************************************/
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/**
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* MACRO DEFINITIONS
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* Needs preprocessing by cpp before fed to scyther
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*/
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#define __IKEV1_PSK__
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#ifndef __ORACLE__
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#include "common.h"
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#endif
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#define HASH_Ii prf(k(I,R), Ni, Nr, g(i), Gr, Ci, Cr, list, I)
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#define HASH_Ir prf(k(R,I), Ni, Nr, Gi, g(r), Ci, Cr, list, I)
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#define HASH_Ri prf(k(I,R), Ni, Nr, Gr, g(i), Cr, Ci, list, R)
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#define HASH_Rr prf(k(R,I), Ni, Nr, g(r), Gi, Cr, Ci, list, R)
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usertype String;
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const list, algo: String;
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/**
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* This role serves as an "oracle" to ensure the executability of the
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* protocol by taking care of the problems that arise from our way of
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* modelling Diffie-Hellman keys.
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*/
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protocol @executability(O) {
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#define Gi g(i)
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#define Gr g(r)
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role O {
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var i, r, Ni, Nr, Ci, Cr: Nonce;
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var I, R: Agent;
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// msg 5
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recv_!O1( O, O, {I, HASH_Ii}Zi );
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send_!O2( O, O, {I, HASH_Ir}Zr );
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// msg 6
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recv_!O3( O, O, {R, HASH_Rr}Zr );
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send_!O4( O, O, {R, HASH_Ri}Zi );
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}
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#undef Gi
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#undef Gr
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}
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protocol ikev1-psk-m-perlman(I, R)
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{
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role I {
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fresh i, Ni, Ci: Nonce;
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var Nr, Cr: Nonce;
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var Gr: Ticket;
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send_1( I, R, Ci, list );
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recv_2( R, I, Ci, Cr, algo );
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send_3( I, R, Ci, Cr, g(i), Ni );
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recv_4( R, I, Ci, Cr, Gr, Nr );
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claim( I, Running, R, Ni, Nr, g(i), Gr, Ci, Cr );
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send_!5( I, R, Ci, Cr, {I, HASH_Ii}Zi );
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recv_!6( R, I, Ci, Cr, {R, HASH_Ri}Zi );
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/* SECURITY CLAIMS */
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claim( I, SKR, SKi );
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claim( I, Alive );
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claim( I, Weakagree );
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claim( I, Commit, R, Ni, Nr, g(i), Gr, Ci, Cr );
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}
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role R {
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fresh r, Nr, Cr: Nonce;
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var Ni, Ci: Nonce;
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var Gi: Ticket;
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recv_1( I, R, Ci, list );
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send_2( R, I, Ci, Cr, algo );
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recv_3( I, R, Ci, Cr, Gi, Ni );
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send_4( R, I, Ci, Cr, g(r), Nr );
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recv_!5( I, R, Ci, Cr, {I, HASH_Ir}Zr );
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claim( R, Running, I, Ni, Nr, Gi, g(r), Ci, Cr );
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send_!6( R, I, Ci, Cr, {R, HASH_Rr}Zr );
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/* SECURITY CLAIMS */
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claim( R, SKR, SKr );
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claim( R, Alive );
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claim( R, Weakagree );
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claim( R, Commit, I, Ni, Nr, Gi, g(r), Ci, Cr );
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}
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}
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