- The work for the non-intruder Arachne part is now mostly done.
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ccremers
parent
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ac174b8130
208
src/arachne.c
208
src/arachne.c
@ -18,6 +18,11 @@ static System sys;
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static Protocol INTRUDER; // Pointers, to be set by the Init
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static Role I_GOAL; // Same here.
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#ifdef DEBUG
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static explanation; // Pointer to a string that describes what we just tried to do
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static indent; // Integer indicating iteration depth 0..
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#endif
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struct goalstruct
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{
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int run;
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@ -133,12 +138,95 @@ iterate_role_sends (int (*func) ())
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return 1;
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}
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//! Generates a new intruder goal, yields runid
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//! Generates a new intruder goal, iterates
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/**
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* Sloppy, does not unify term but hardcodes it into the stuff.
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*/
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int
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add_intruder_goal (Term t)
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add_intruder_goal (Goal goal)
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{
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int run;
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int flag;
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Roledef rd;
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roleInstance (sys, INTRUDER, I_GOAL, NULL);
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return (sys->maxruns - 1);
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run = sys->maxruns - 1;
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goal.rd->bind_run = run;
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goal.rd->bind_index = 0;
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rd = sys->runs[run].start;
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termDelete (rd->message);
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rd->message = goal.rd->message;
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#ifdef DEBUG
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explanation = "Adding intruder goal";
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#endif
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flag = iterate ();
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roleInstanceDestroy (sys); // destroy the created run
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goal.rd->bind_run = INVALID;
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return flag;
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}
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//! Bind a goal to an existing regular run, if possible
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int
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bind_existing_run (const Goal goal, const Protocol p, const Role r,
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const int index)
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{
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int run, flag;
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flag = 1;
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for (run = 0; run < sys->maxruns; run++)
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{
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if (sys->runs[run].protocol == p && sys->runs[run].role == r)
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{
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int i;
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int old_length;
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Roledef rd;
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// find roledef entry
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rd = sys->runs[run].start;
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for (i = 0; i < index; i++)
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rd = rd->next;
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// mgu and iterate
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old_length = sys->runs[run].length;
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if (index >= old_length)
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sys->runs[run].length = index + 1;
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#ifdef DEBUG
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explanation = "Bind existing run";
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#endif
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flag =
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flag & termMguInTerm (goal.rd->message, rd->message, mgu_iterate);
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sys->runs[run].length = old_length;
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}
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}
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return flag;
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}
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//! Bind a goal to a new run
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int
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bind_new_run (const Goal goal, const Protocol p, const Role r,
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const int index)
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{
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int run;
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int flag;
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Roledef rd;
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roleInstance (sys, p, r, NULL);
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run = sys->maxruns-1;
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sys->runs[run].length = index+1;
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goal.rd->bind_run = run;
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goal.rd->bind_index = index;
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rd = roledef_shift (sys->runs[run].start, index);
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#ifdef DEBUG
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explanation = "Bind new run";
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#endif
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iterate ();
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goal.rd->bind_run = INVALID;
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roleInstanceDestroy (sys);
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return flag;
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}
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//------------------------------------------------------------------------
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@ -181,67 +269,6 @@ select_goal ()
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return goal;
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}
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//! Bind a goal to an existing regular run, if possible
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int
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bind_existing_run (const Goal goal, const Protocol p, const Role r,
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const int index)
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{
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int run, flag;
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flag = 1;
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for (run = 0; run < sys->maxruns; run++)
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{
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if (sys->runs[run].protocol == p && sys->runs[run].role == r)
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{
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int i;
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int old_length;
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Roledef rd;
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// find roledef entry
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rd = sys->runs[run].start;
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for (i = 0; i < index; i++)
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rd = rd->next;
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// mgu and iterate
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old_length = sys->runs[run].length;
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if (index >= old_length)
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sys->runs[run].length = index + 1;
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flag =
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flag & termMguInTerm (goal.rd->message, rd->message, mgu_iterate);
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sys->runs[run].length = old_length;
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}
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}
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return flag;
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}
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//! Bind a goal to a new run
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int
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bind_new_run (const Goal goal, const Protocol p, const Role r,
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const int index)
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{
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int run;
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int flag;
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Roledef rd;
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roleInstance (sys, p, r, NULL);
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run = sys->maxruns-1;
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sys->runs[run].length = index+1;
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goal.rd->bind_run = run;
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goal.rd->bind_index = index;
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rd = roledef_shift (sys->runs[run].start, index);
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// Possibly double recursion (overkill) because of interm construct. Find a way to maintain this over instances/
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/**
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*@todo We should have the roleInstance carry over any instantiated vars from the roledef, and then undo the instatiations on the original.
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* Then this could simply iterate, which is much better.
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*/
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flag = termMguInTerm (goal.rd->message, rd->message, mgu_iterate);
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goal.rd->bind_run = INVALID;
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roleInstanceDestroy (sys);
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return flag;
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}
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//! Bind a regular goal
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int
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bind_goal_regular (const Goal goal)
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@ -258,10 +285,15 @@ bind_goal_regular (const Goal goal)
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/**
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* Two options; as this, it is from an existing run,
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* or from a new one.
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*
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* Note that we only bind to regular runs here
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*/
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int flag;
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termlistSubstReset (substlist); // undo, we don't really need that
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if (p == INTRUDER)
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{
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return 1; // don't abort scans
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}
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flag = bind_existing_run (goal, p, r, index);
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if (flag)
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{
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@ -279,15 +311,7 @@ bind_goal_regular (const Goal goal)
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// Bind to an intruder node?
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if (flag)
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{
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int run;
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goal.rd->bind_run = add_intruder_goal (goal.rd->message); // creates a new run
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goal.rd->bind_index = 0; // such a run only has a simple read;
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flag = iterate ();
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roleInstanceDestroy (sys); // destroy the created run
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goal.rd->bind_run = INVALID;
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add_intruder_goal (goal); // creates a new run
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}
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return flag;
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}
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@ -331,20 +355,31 @@ prune ()
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int
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iterate ()
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{
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int flag;
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Goal goal;
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/**
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* Possibly prune this state
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*/
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flag = 1;
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#ifdef DEBUG
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indent++;
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#endif
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if (prune ())
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return 0;
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{
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/**
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* Not pruned: count
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*/
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sys->states = statesIncrease (sys->states);
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#ifdef DEBUG
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if (explanation != NULL)
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{
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int i;
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for (i = 0; i < indent; i++)
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eprintf (" ");
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eprintf ("%s\n", explanation);
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explanation = NULL;
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}
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#endif
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/**
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* Check whether its a final state (i.e. all goals bound)
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@ -356,16 +391,21 @@ iterate ()
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/*
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* all goals bound, check for property
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*/
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return 1;
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//!@todo Property check in Arachne.
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}
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else
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{
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/*
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* bind this goal in all possible ways and iterate
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*/
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return bind_goal (goal);
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flag = bind_goal (goal);
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}
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}
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#ifdef DEBUG
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indent--;
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#endif
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return flag;
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}
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//! Main code for Arachne
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/**
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@ -377,6 +417,10 @@ arachne ()
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/*
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* set up claim role(s)
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*/
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#ifdef DEBUG
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explanation = NULL;
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indent = -1;
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#endif
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/*
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* iterate
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@ -596,12 +596,13 @@ inverseKey (Termlist inverses, Term key)
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*\sa termlistLocal()
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*/
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Term
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termLocal (const Term t, Termlist fromlist, Termlist tolist,
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termLocal (Term t, Termlist fromlist, Termlist tolist,
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const Termlist locals, const int runid)
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{
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if (t == NULL)
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return NULL;
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deVar (t); // remove any instantiated variables from the term.
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if (realTermLeaf (t))
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{
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while (fromlist != NULL && tolist != NULL)
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@ -1,3 +1,7 @@
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- roleInstance should determine whether any role variables (e.g. role names,
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received values) are already instantiated. These should be copied and
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replaced by their substitution values. Then, still in roleInstance, the role
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variables should be reset.
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- Constraint logic now also has no checks for when a run is done by the
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intruder (which should be excluded).
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- Fix constants in intruder knowledge. Auto add single one of each type,
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