diff options
Diffstat (limited to 'verigraph/service/src/mcnet/netobjs/PolitoVpnAccess.java')
| -rw-r--r-- | verigraph/service/src/mcnet/netobjs/PolitoVpnAccess.java | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/verigraph/service/src/mcnet/netobjs/PolitoVpnAccess.java b/verigraph/service/src/mcnet/netobjs/PolitoVpnAccess.java new file mode 100644 index 0000000..e6fc5fe --- /dev/null +++ b/verigraph/service/src/mcnet/netobjs/PolitoVpnAccess.java @@ -0,0 +1,142 @@ +/******************************************************************************* + * Copyright (c) 2017 Politecnico di Torino and others. + * + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Apache License, Version 2.0 + * which accompanies this distribution, and is available at + * http://www.apache.org/licenses/LICENSE-2.0 + *******************************************************************************/ + +package mcnet.netobjs; + +import java.util.ArrayList; +import java.util.List; + +import com.microsoft.z3.BoolExpr; +import com.microsoft.z3.Context; +import com.microsoft.z3.DatatypeExpr; +import com.microsoft.z3.Expr; +import com.microsoft.z3.FuncDecl; +import com.microsoft.z3.IntExpr; +import com.microsoft.z3.Solver; + +import mcnet.components.NetContext; +import mcnet.components.Network; +import mcnet.components.NetworkObject; + +public class PolitoVpnAccess extends NetworkObject { + + List<BoolExpr> constraints = new ArrayList<BoolExpr>(); + DatatypeExpr politoVpnAccess; + FuncDecl private_addr_func; + NetContext nctx; + Context ctx; + Network net; + + public PolitoVpnAccess(Context ctx, Object[]... args) { + super(ctx, args); + } + + @Override + public DatatypeExpr getZ3Node() { + return politoVpnAccess; + } + + @Override + protected void init(Context ctx, Object[]... args) { + this.ctx = ctx; + this.isEndHost = false; + this.politoVpnAccess = this.z3Node = ((NetworkObject)args[0][0]).getZ3Node(); + this.net = (Network)args[0][1]; + this.nctx = (NetContext)args[0][2]; + } + + @Override + protected void addConstraints(Solver solver) { + BoolExpr[] constr = new BoolExpr[constraints.size()]; + solver.add(constraints.toArray(constr)); + } + + public void vpnAccessModel(DatatypeExpr vpnAccessIp, DatatypeExpr vpnExitIp) { + Expr x = ctx.mkConst("vpn_x", nctx.node); + Expr y = ctx.mkConst("vpn_y", nctx.node); + + Expr p_0 = ctx.mkConst("vpn_p_0", nctx.packet); + Expr p_1 = ctx.mkConst("vpn_p_1", nctx.packet); + + IntExpr t_0 = ctx.mkIntConst("vpn_t_0"); + IntExpr t_1 = ctx.mkIntConst("vpn_t_1"); + + private_addr_func = ctx.mkFuncDecl("vpn_private_addr_func", nctx.address, ctx.mkBoolSort()); + + BoolExpr constraint1 = ctx.mkForall(new Expr[]{t_0, p_0, x}, + ctx.mkImplies(ctx.mkAnd( + (BoolExpr)nctx.send.apply(politoVpnAccess, x, p_0, t_0), + ctx.mkEq(nctx.pf.get("inner_src").apply(p_0), nctx.am.get("null"))), + ctx.mkAnd( + (BoolExpr)private_addr_func.apply(nctx.pf.get("dest").apply(p_0)), + ctx.mkNot((BoolExpr)nctx.pf.get("encrypted").apply(p_0)), + ctx.mkExists(new Expr[]{y, p_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(y, politoVpnAccess, p_1, t_1), + ctx.mkLt(t_1, t_0), + (BoolExpr)nctx.pf.get("encrypted").apply(p_1), + ctx.mkEq(nctx.pf.get("src").apply(p_1), vpnExitIp), + ctx.mkEq(nctx.pf.get("dest").apply(p_1), vpnAccessIp), + ctx.mkEq(nctx.pf.get("inner_src").apply(p_1), nctx.pf.get("src").apply(p_0)), + ctx.mkEq(nctx.pf.get("inner_dest").apply(p_1), nctx.pf.get("dest").apply(p_0)), + ctx.mkEq(nctx.pf.get("origin").apply(p_1), nctx.pf.get("origin").apply(p_0)), + ctx.mkEq(nctx.pf.get("orig_body").apply(p_1), nctx.pf.get("orig_body").apply(p_0)), + ctx.mkEq(nctx.pf.get("body").apply(p_1), nctx.pf.get("body").apply(p_0)), + ctx.mkEq(nctx.pf.get("seq").apply(p_1), nctx.pf.get("seq").apply(p_0)), + ctx.mkEq(nctx.pf.get("proto").apply(p_1), nctx.pf.get("proto").apply(p_0)), + ctx.mkEq(nctx.pf.get("emailFrom").apply(p_1), nctx.pf.get("emailFrom").apply(p_0)), + ctx.mkEq(nctx.pf.get("url").apply(p_1), nctx.pf.get("url").apply(p_0)), + ctx.mkEq(nctx.pf.get("options").apply(p_1), nctx.pf.get("options").apply(p_0))), 1, null, null, null, null))), + 1,null,null,null,null); + + constraints.add(constraint1); + + BoolExpr constraint2 = ctx.mkForall(new Expr[]{t_0, p_0, x}, + ctx.mkImplies(ctx.mkAnd( + (BoolExpr)nctx.send.apply(politoVpnAccess, x, p_0, t_0), + ctx.mkNot(ctx.mkEq(nctx.pf.get("inner_src").apply(p_0), nctx.am.get("null")))), + ctx.mkAnd( + ctx.mkEq(nctx.pf.get("src").apply(p_0), vpnAccessIp), + ctx.mkEq(nctx.pf.get("dest").apply(p_0), vpnExitIp), + (BoolExpr)private_addr_func.apply(nctx.pf.get("inner_src").apply(p_0)), + ctx.mkNot(ctx.mkEq(nctx.pf.get("inner_dest").apply(p_0), vpnAccessIp)), + (BoolExpr)nctx.pf.get("encrypted").apply(p_0), + ctx.mkExists(new Expr[]{y, p_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(y, politoVpnAccess, p_1, t_1), + ctx.mkLt(t_1, t_0), + ctx.mkNot((BoolExpr)nctx.pf.get("encrypted").apply(p_1)), + ctx.mkEq(nctx.pf.get("src").apply(p_1), nctx.pf.get("inner_src").apply(p_0)), + ctx.mkEq(nctx.pf.get("dest").apply(p_1), nctx.pf.get("inner_dest").apply(p_0)), + ctx.mkEq(nctx.pf.get("inner_src").apply(p_1), nctx.am.get("null")), + ctx.mkEq(nctx.pf.get("inner_dest").apply(p_1), nctx.am.get("null")), + ctx.mkEq(nctx.pf.get("origin").apply(p_1), nctx.pf.get("origin").apply(p_0)), + ctx.mkEq(nctx.pf.get("orig_body").apply(p_1), nctx.pf.get("orig_body").apply(p_0)), + ctx.mkEq(nctx.pf.get("body").apply(p_1), nctx.pf.get("body").apply(p_0)), + ctx.mkEq(nctx.pf.get("seq").apply(p_1), nctx.pf.get("seq").apply(p_0)), + ctx.mkEq(nctx.pf.get("proto").apply(p_1), nctx.pf.get("proto").apply(p_0)), + ctx.mkEq(nctx.pf.get("emailFrom").apply(p_1), nctx.pf.get("emailFrom").apply(p_0)), + ctx.mkEq(nctx.pf.get("url").apply(p_1), nctx.pf.get("url").apply(p_0)), + ctx.mkEq(nctx.pf.get("options").apply(p_1), nctx.pf.get("options").apply(p_0))), 1, null, null, null, null))), + 1,null,null,null,null); + + constraints.add(constraint2); + } + + public void setInternalAddress(ArrayList<DatatypeExpr> internalAddress){ + List<BoolExpr> constr = new ArrayList<BoolExpr>(); + Expr n_0 = ctx.mkConst("vpn_node", nctx.address); + + for(DatatypeExpr n : internalAddress){ + constr.add(ctx.mkEq(n_0,n)); + } + BoolExpr[] constrs = new BoolExpr[constr.size()]; + //Constraint private_addr_func(n_0) == or(n_0==n foreach internal address) + constraints.add(ctx.mkForall(new Expr[]{n_0}, ctx.mkEq(private_addr_func.apply(n_0),ctx.mkOr(constr.toArray(constrs))),1,null,null,null,null)); + } + +}
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