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Updated the advanced example in the readme, so it will actually work. #27

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Updated the advanced example in the readme, so it will actually work. #27

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12 changes: 9 additions & 3 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -55,23 +55,27 @@ strings.forEach(string => console.log(string));
This script takes the obfuscated source and turns it into something much more readable.

```js
const { refactor } = require('.'); // require('shift-refactor');
const { refactor } = require('shift-refactor');
const { commonMethods } = require('refactor-plugin-common');
const Shift = require('shift-ast');

// Obfuscated source
const src = `var a=['\x74\x61\x72\x67\x65\x74','\x73\x65\x74\x54\x61\x72\x67\x65\x74','\x77\x6f\x72\x6c\x64','\x67\x72\x65\x65\x74','\x72\x65\x61\x64\x65\x72'];var b=function(c,d){c=c-0x0;var e=a[c];return e;};(function(){class c{constructor(d){this[b('0x0')]=d;}['\x67\x72\x65\x65\x74'](){console['\x6c\x6f\x67']('\x48\x65\x6c\x6c\x6f\x20'+this[b('0x0')]);}[b('0x1')](e){this['\x74\x61\x72\x67\x65\x74']=e;}}const f=new c(b('0x2'));f[b('0x3')]();f[b('0x1')](b('0x4'));f[b('0x3')]();}());`;

const $script = refactor(src);
const $script = refactor(src, commonMethods);

const strings = $script(`Script > :first-child ArrayExpression > .elements`);

// Variable `b` pointing to anonymous function.
const destringifyDeclarator = $script(`VariableDeclarator[binding.name="b"][init.params.items.length=2]`);

destringifyDeclarator.rename('destringify');


const destringifyOffset = destringifyDeclarator.$(`BinaryExpression > LiteralNumericExpression`);

const findIndex = (c, d) => c - destringifyOffset.first().value;
// Get that anonymous function its `c` variable offset value (0x0).
const findIndex = (c, d) => c - destringifyOffset.nodes[0].value;

$script(`CallExpression[callee.name="destringify"]`).replace(
node => {
Expand All @@ -81,9 +85,11 @@ $script(`CallExpression[callee.name="destringify"]`).replace(
}
)

// Cleanup; remove no longer needed destringify function and remove the string array it uses.
$script(`[binding.name="a"]`).delete();
$script(`[binding.name="destringify"]`).delete();

// Turn computed member expressions into static member expressions.
$script.convertComputedToStatic();

console.log($script.print());
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