103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
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/**********************************************************************
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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 Quick mode (pfs), without optional identities
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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_QUICK__
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#ifndef __ORACLE__
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#include "common.h"
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#endif
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/* k(I,R)=k(R,I) equal Ka from the spec */
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#define HASH1i prf(k(I,R), mid, list, Ni, g(i))
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#define HASH1r prf(k(R,I), mid, list, Ni, Gi)
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#define HASH2i prf(k(I,R), mid, Ni, algo, Nr, Gr)
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#define HASH2r prf(k(R,I), mid, Ni, algo, Nr, g(r))
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#define HASH3i prf(k(I,R), mid, Ni, Nr)
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#define HASH3r prf(k(R,I), mid, Ni, Nr)
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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 k(I,R) = k(R,I).
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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 mid, i, r, Ni, Nr: Nonce;
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var I, R: Agent;
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// msg 1
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recv_!O1( O, O, {HASH1i, list, Ni, g(i)}k(I,R) );
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send_!O2( O, O, {HASH1r, list, Ni, Gi}k(R,I) );
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// msg 2
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recv_!O3( O, O, {HASH2r, algo, Nr, g(r)}k(R,I) );
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send_!O4( O, O, {HASH2i, algo, Nr, Gr}k(I,R) );
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// msg 3
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recv_!O5( O, O, {HASH3i}k(I,R) );
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send_!O6( O, O, {HASH3r}k(R,I) );
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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-quick-noid(I, R)
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{
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role I {
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fresh i, Ni, Ci, mid: Nonce;
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var Nr, Cr: Nonce;
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var Gr: Ticket;
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send_!1( I, R, mid, {HASH1i, list, Ni, g(i)}k(I,R) );
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recv_!2( R, I, mid, {HASH2i, algo, Nr, Gr}k(I,R) );
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claim( I, Running, R, Ni, Nr, g(i), Gr );
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send_!3( I, R, mid, {HASH3i}k(I,R) );
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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 );
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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, mid: Nonce;
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var Gi: Ticket;
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recv_!1( I, R, mid, {HASH1r, list, Ni, Gi}k(R,I) );
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claim( R, Running, I, Ni, Nr, Gi, g(r) );
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send_!2( R, I, mid, {HASH2r, algo, Nr, g(r)}k(R,I) );
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recv_!3( I, R, mid, {HASH3r}k(R,I) );
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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) );
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}
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}
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// TODO: Incorporate into various phase 1 protocols (see spec for adaptions)
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// NOTE: If incorporated in phase 1, make sure to model with and without optional identities in msg 2 & 3
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