scyther/gui/Protocols/ccitt509-ban3.spdl

40 lines
972 B
Plaintext
Raw Normal View History

2006-11-21 13:42:06 +00:00
# BAN modified version of CCITT X.509 (3)
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/ccittx509_3BAN.html
#
# Note:
# The protocol description also states that Xa and Ya should be fresh
# this can not be verified using scyther
#
# Note:
# According to SPORE there are no known attacks on this protocol
#
protocol ccitt509-ban3(I,R)
{
role I
{
fresh Na,Xa,Ya: Nonce;
2006-11-21 13:42:06 +00:00
var Xb,Nb,Yb: Nonce;
send_1(I,R, I,{Na, R, Xa,{Ya}pk(R)}sk(I));
2012-04-26 15:40:01 +01:00
recv_2(R,I, R,{Nb, I, Na, Xb,{Yb}pk(I)}sk(R));
2006-11-21 13:42:06 +00:00
send_3(I,R, I,{R, Nb}sk(I));
claim_4(I,Nisynch);
}
role R
{
var Na,Xa,Ya: Nonce;
fresh Xb,Yb,Nb: Nonce;
2006-11-21 13:42:06 +00:00
2012-04-26 15:40:01 +01:00
recv_1(I,R, I,{Na, R, Xa,{Ya}pk(R)}sk(I));
2006-11-21 13:42:06 +00:00
send_2(R,I, R,{Nb, I, Na, Xb,{Yb}pk(I)}sk(R));
2012-04-26 15:40:01 +01:00
recv_3(I,R, I,{R, Nb}sk(I));
2006-11-21 13:42:06 +00:00
claim_5(R,Nisynch);
# There should also be Fresh Xa and Fresh Ya claims here
}
}