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