FlowIntegrity

SizeChanges

POC

function getCallStack() {
    var stack = "#", total = 0, fn = arguments.callee;
    while ( (fn = fn.caller) ) {
        stack = stack + "" +fn.name;
        total++
    }
    return stack
}
function test1() {
    if ('#test1test2test3test4' !== getCallStack()) alert('flow of execution was tampered!')
}
function test2() {
    test1();
}
function test3() {
    test2();
}
function test4() {
    test3();
}
test4();

About

The idea here is to test the integrity of the flow of execution "on the fly" and to pick the next behaviour based on it. Normally, if calling getCallStack() outputs something different than expected, it probably means someone has been playing around with the code.

Resources

• Original explanation [J. M. Fernández]