Added IKE base models.

Modelers: Adrian Kyburz and Cas Cremers
2012-11-15 11:48:14 +01:00
parent 5918bf1a3c
commit 34d7cba293
59 changed files with 6156 additions and 0 deletions
--- a/gui/Protocols/IKE/ikev2-child.cpp
+++ b/gui/Protocols/IKE/ikev2-child.cpp
@@ -0,0 +1,87 @@
+/**********************************************************************
+ * @protocol	Internet Key Exchange Protocol (IKEv2)                 
+ * @subprotocol IKE Create Child SA                                    
+ * @reference	RFC 4306                                               
+ * @variant		Supports perfect forward secrecy                       
+ **********************************************************************/
+
+/**
+ * MACRO DEFINITIONS
+ * Needs preprocessing by cpp before fed to scyther
+ */
+
+#define __IKEV2_CHILD__
+#ifndef __ORACLE__
+#include "common.h"
+#endif
+
+
+usertype SecurityAssociation;
+const SA1 ,SA2, SA3: SecurityAssociation;
+
+/**
+ * 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 k(I,R) = k(R,I).
+ */
+protocol @executability(O) {
+#define Gi g(i)
+#define Gr g(r)
+	role O {
+		var i, r, Ni, Nr: Nonce;
+		var I, R: Agent;
+
+		// msg 1
+		recv_!O1( O, O, {SA3, Ni, g(i)}k(I,R) );
+		send_!O2( O, O, {SA3, Ni, g(i)}k(R,I) );
+
+		// msg 2
+		recv_!O3( O, O, {SA3, Nr, Gr}k(R,I) );
+		send_!O4( O, O, {SA3, Nr, Gr}k(I,R) );
+
+	}
+#undef Gi
+#undef Gr
+}
+
+// Note: SPIs not modeled as they would lead to trivial attacks where the adversary 
+// tampers with the SPIs (they are not subsequently authenticated)
+protocol ikev2-child(I, R)
+{
+
+	role I {
+		fresh i, Ni:	Nonce;
+		var   Nr:		Nonce;
+		var   Gr:		Ticket;
+
+		/* IKE_SA_INIT */
+		claim( I, Running, R,Ni,g(i) );
+		send_!1( I, R, {SA3, Ni, g(i)}k(I,R) );
+		recv_!2( R, I, {SA3, Nr, Gr}k(I,R) );
+
+		/* SECURITY CLAIMS */
+		claim( I, SKR, SKi );
+
+		claim( I, Alive );
+		claim( I, Weakagree );
+		claim( I, Commit, R,Ni,g(i),Nr,Gr );
+				
+	}
+
+	role R {
+		fresh r, Nr:	Nonce;
+		var   Ni:		Nonce;
+		var   Gi:		Ticket;
+
+		recv_!1( I, R, {SA3, Ni, Gi}k(R,I) );
+		claim( R, Running, I,Ni,Gi,Nr,g(r) );
+		send_!2( R, I, {SA3, Nr, g(r)}k(R,I) );
+
+		/* SECURITY CLAIMS */
+		claim( R, SKR, SKr );
+
+		claim( R, Alive );
+		claim( R, Weakagree );
+		claim( R, Commit, I,Ni,Gi );
+	}
+}