scyther/gui/Protocols/IKE/ikev1-pk-a1.cpp

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/**********************************************************************
* @protocol Internet Key Exchange Protocol (IKEv1)
* @reference RFC 2409,
* Boyd C. and Mathuria A., Protocols for Authentication
* and Key Agreement
* @variant Public key authentication (aggressive mode),
* last message not encrypted
**********************************************************************/
/**
* MACRO DEFINITIONS
* Needs preprocessing by cpp before fed to scyther
*/
#define __IKEV1__
#ifndef __ORACLE__
#include "common.h"
#endif
#define SKEYID prf(H(Ni,Nr),Ci,Cr)
#define HASH_Ii prf(Ni, Nr, Zi, g(i), Gr, Ci, Cr, list, I)
#define HASH_Ir prf(Ni, Nr, Zr, Gi, g(r), Ci, Cr, list, I)
#define HASH_Ri prf(Ni, Nr, Zi, Gr, g(i), Cr, Ci, list, R)
#define HASH_Rr prf(Ni, Nr, Zr, g(r), Gi, Cr, Ci, list, R)
#define HASH1 H(CERT(R))
usertype String;
const list, algo: String;
/**
* This role serves as an "oracle" to ensure the executability of the
* protocol by taking care of the problems that arise from our way of
* modelling Diffie-Hellman keys.
*/
protocol @executability(O) {
#define Gi g(i)
#define Gr g(r)
role O {
var i, r, Ni, Nr, Ci, Cr: Nonce;
var I, R: Agent;
// msg 2
recv_!O1( O, O, HASH_Rr );
send_!O2( O, O, HASH_Ri );
// msg 3
recv_!O3( O, O, HASH_Ii );
send_!O4( O, O, HASH_Ir );
}
#undef Gi
#undef Gr
}
protocol ikev1-pk-a1(I, R)
{
role I {
fresh i, Ni, Ci: Nonce;
var Nr, Cr: Nonce;
var Gr: Ticket;
send_1( I, R, Ci, list, g(i), {I}pk(R), {Ni}pk(R) );
recv_!2( R, I, Ci, Cr, algo, Gr, {R}pk(I), {Nr}pk(I), HASH_Ri );
claim( I, Running, R, g(i),Gr,Ci,Cr,Ni,Nr );
send_!3( I, R, Ci, Cr, HASH_Ii );
/* SECURITY CLAIMS */
claim( I, SKR, SKi );
claim( I, Alive );
claim( I, Weakagree );
claim( I, Commit, R, g(i),Gr,Ci,Cr,Ni,Nr );
}
role R {
fresh r, Nr, Cr: Nonce;
var Ni, Ci: Nonce;
var Gi: Ticket;
recv_1( I, R, Ci, list, Gi, {I}pk(R), {Ni}pk(R) );
claim( R, Running, I, Gi,g(r),Ci,Cr,Ni,Nr );
send_!2( R, I, Ci, Cr, algo, g(r), {R}pk(I), {Nr}pk(I), HASH_Rr );
recv_!3( I, R, Ci, Cr, HASH_Ir );
/* SECURITY CLAIMS */
claim( R, SKR, SKr );
claim( R, Alive );
claim( R, Weakagree );
claim( R, Commit, I, Gi,g(r),Ci,Cr,Ni,Nr );
}
}