restringer
Version:
Deobfuscate Javascript with emphasis on reconstructing strings
30 lines (29 loc) • 912 B
JavaScript
/**
* Replace if statements which will always resolve the same way with their relevant consequent or alternative.
* E.g.
* if (true) do_a(); else do_b(); if (false) do_c(); else do_d();
* ==>
* do_a(); do_d();
* @param {Arborist} arb
* @param {Function} candidateFilter (optional) a filter to apply on the candidates list
* @return {Arborist}
*/
function resolveDeterministicIfStatements(arb, candidateFilter = () => true) {
const relevantNodes = [
...(arb.ast[0].typeMap.IfStatement || []),
];
for (let i = 0; i < relevantNodes.length; i++) {
const n = relevantNodes[i];
if (n.test.type === 'Literal' && candidateFilter(n)) {
if (n.test.value) {
if (n.consequent) arb.markNode(n, n.consequent);
else arb.markNode(n);
} else {
if (n.alternate) arb.markNode(n, n.alternate);
else arb.markNode(n);
}
}
}
return arb;
}
export default resolveDeterministicIfStatements;