61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
|
/** HEADDOC
|
||
|
|
* @protocol SKEME
|
||
|
|
* @reference Krawczyk, H., SKEME: A Versatile Secure Key Exchange Mechanism
|
||
|
|
* for Internet,
|
||
|
|
* Boyd C. and Mathuria A., Protocols for Authentication and
|
||
|
|
* Key Agreement
|
||
|
|
* @description SKEME is a set of protocols suitable for negotiation of
|
||
|
|
* services in a general networked environment. The main
|
||
|
|
* characteristics are forward secrecy, privacy and anonymity,
|
||
|
|
* and DoS protection.
|
||
|
|
* @variant Basic mode
|
||
|
|
**/
|
||
|
|
|
||
|
|
|
||
|
|
/** MACRO DEFINITIONS
|
||
|
|
* Needs preprocessing by cpp before fed to scyther
|
||
|
|
* Note: May use the same oracles as sts
|
||
|
|
**/
|
||
|
|
#define __SKEME__
|
||
|
|
#ifndef __ORACLE__
|
||
|
|
#include "common.h"
|
||
|
|
#endif
|
||
|
|
#define Kir prf(Ni,Nr)
|
||
|
|
|
||
|
|
|
||
|
|
protocol skeme-basic(I, R)
|
||
|
|
{
|
||
|
|
role I {
|
||
|
|
fresh i, Ni: Nonce;
|
||
|
|
var Nr: Nonce;
|
||
|
|
var Gr: Ticket;
|
||
|
|
|
||
|
|
send_1( I, R, {I, Ni}pk(R), g(i) );
|
||
|
|
recv_2( R, I, {Nr}pk(I), Gr, prf(Kir, g(i), Gr, R, I) );
|
||
|
|
send_3( I, R, prf(Kir, Gr, g(i), I, R) );
|
||
|
|
|
||
|
|
/* SECURITY CLAIMS */
|
||
|
|
claim( I, SKR, SKi );
|
||
|
|
|
||
|
|
claim( I, Alive );
|
||
|
|
claim( I, Weakagree );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
role R {
|
||
|
|
fresh r, Nr: Nonce;
|
||
|
|
var Ni: Nonce;
|
||
|
|
var Gi: Ticket;
|
||
|
|
|
||
|
|
recv_1( I, R, {I, Ni}pk(R), Gi );
|
||
|
|
send_2( R, I, {Nr}pk(I), g(r), prf(Kir, Gi, g(r), R, I) );
|
||
|
|
recv_3( I, R, prf(Kir, g(r), Gi, I, R) );
|
||
|
|
|
||
|
|
/* SECURITY CLAIMS */
|
||
|
|
claim( R, SKR, SKr );
|
||
|
|
|
||
|
|
claim( R, Alive );
|
||
|
|
claim( R, Weakagree );
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|