104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
/**********************************************************************
|
|
* @protocol Internet Key Exchange Protocol (IKEv2)
|
|
* @subprotocol Signature authenticated IKEv2
|
|
* @reference RFC 4306
|
|
* @variant Includes optional payloads
|
|
**********************************************************************/
|
|
|
|
/**
|
|
* MACRO DEFINITIONS
|
|
* Needs preprocessing by cpp before fed to scyther
|
|
*/
|
|
|
|
#define __IKEV2__
|
|
#ifndef __ORACLE__
|
|
#include "common.h"
|
|
#endif
|
|
|
|
#define AUTHii {SPIi, O, SA1, g(i), Ni, Nr, prf(SKi, I)}sk(I)
|
|
#define AUTHir {SPIi, O, SA1, Gi, Ni, Nr, prf(SKr, I)}sk(I)
|
|
#define AUTHri {SPIi, SPIr, SA1, Gr, Nr, Ni, prf(SKi, R)}sk(R)
|
|
#define AUTHrr {SPIi, SPIr, SA1, g(r), Nr, Ni, prf(SKr, R)}sk(R)
|
|
|
|
|
|
usertype Number, SecurityAssociation, TrafficSelector;
|
|
const O: Number;
|
|
const SA1 ,SA2: SecurityAssociation;
|
|
const TSi, TSr: TrafficSelector;
|
|
|
|
/**
|
|
* 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(E) {
|
|
#define Gi g(i)
|
|
#define Gr g(r)
|
|
role E {
|
|
var i, r, Ni, Nr, SPIi, SPIr: Nonce;
|
|
var I, R: Agent;
|
|
|
|
// msg 3
|
|
recv_!E1( E, E, {I, R, AUTHii, SA2, TSi, TSr}SKi );
|
|
send_!E2( E, E, {I, R, AUTHir, SA2, TSi, TSr}SKr );
|
|
|
|
// msg 4
|
|
recv_!E3( E, E, {R, AUTHrr, SA2, TSi, TSr}SKr );
|
|
send_!E4( E, E, {R, AUTHri, SA2, TSi, TSr}SKi );
|
|
|
|
}
|
|
#undef Gi
|
|
#undef Gr
|
|
}
|
|
|
|
|
|
protocol ikev2-sig(I, R)
|
|
{
|
|
role I {
|
|
fresh i, Ni, SPIi: Nonce;
|
|
var Nr, SPIr: Nonce;
|
|
var Gr: Ticket;
|
|
|
|
|
|
/* IKE_SA_INIT */
|
|
send_1( I, R, SPIi, O, SA1, g(i), Ni );
|
|
recv_2( R, I, HDR, SA1, Gr, Nr );
|
|
|
|
/* IKE_AUTH */
|
|
claim( I, Running, R,g(i),Gr,Ni,Nr );
|
|
send_!3( I, R, HDR, {I, R, AUTHii, SA2, TSi, TSr}SKi );
|
|
recv_!4( R, I, HDR, {R, AUTHri, SA2, TSi, TSr}SKi );
|
|
|
|
/* SECURITY CLAIMS */
|
|
claim( I, SKR, SKi );
|
|
|
|
claim( I, Alive );
|
|
claim( I, Weakagree );
|
|
claim( I, Commit, R,g(i),Gr,Ni,Nr );
|
|
|
|
}
|
|
|
|
role R {
|
|
fresh r, Nr, SPIr: Nonce;
|
|
var Ni, SPIi: Nonce;
|
|
var Gi: Ticket;
|
|
|
|
|
|
/* IKE_SA_INIT */
|
|
recv_1( I, R, SPIi, O, SA1, Gi, Ni );
|
|
send_2( R, I, HDR, SA1, g(r), Nr );
|
|
|
|
/* IKE_AUTH */
|
|
recv_!3( I, R, HDR, {I, R, AUTHir, SA2, TSi, TSr}SKr );
|
|
claim( R, Running, I,Gi,g(r),Ni,Nr );
|
|
send_!4( R, I, HDR, {R, AUTHrr, SA2, TSi, TSr}SKr );
|
|
|
|
/* SECURITY CLAIMS */
|
|
claim( R, SKR, SKr );
|
|
|
|
claim( R, Alive );
|
|
claim( R, Weakagree );
|
|
claim( R, Commit, I,Gi,g(r),Ni,Nr );
|
|
}
|
|
}
|