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Added tests for string array index shift
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@sanex3339
sanex3339 committed Nov 14, 2020
1 parent cf0dadd commit 5e8c164
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Showing 5 changed files with 222 additions and 17 deletions.
2 changes: 1 addition & 1 deletion dist/index.cli.js
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2 changes: 1 addition & 1 deletion dist/index.js
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1 change: 1 addition & 0 deletions test/functional-tests/javascript-obfuscator/JavaScriptObfuscator.spec.ts
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Expand Up @@ -918,6 +918,7 @@ describe('JavaScriptObfuscator', () => {
StringArrayEncoding.Base64,
StringArrayEncoding.Rc4
],
stringArrayIndexShift: true,
stringArrayWrappersChainedCalls: true,
stringArrayWrappersCount: 10,
stringArrayWrappersType: StringArrayWrappersType.Function,
Expand Down
225 changes: 210 additions & 15 deletions ...formers/string-array-transformers/string-array-transformer/StringArrayTransformer.spec.ts
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Expand Up @@ -2,6 +2,7 @@ import { assert } from 'chai';

import { IdentifierNamesGenerator } from '../../../../../src/enums/generators/identifier-names-generators/IdentifierNamesGenerator';
import { StringArrayEncoding } from '../../../../../src/enums/node-transformers/string-array-transformers/StringArrayEncoding';
import { StringArrayWrappersType } from '../../../../../src/enums/node-transformers/string-array-transformers/StringArrayWrappersType';

import { NO_ADDITIONAL_NODES_PRESET } from '../../../../../src/options/presets/NoCustomNodes';

Expand Down Expand Up @@ -63,7 +64,201 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #3: same literal node values', () => {
describe('Variant #3: `stringArrayIndexShift` option is enabled', () => {
const stringArrayIndexShiftRegExp: RegExp = /_0x(?:[a-f0-9]){4,6} *= *_0x(?:[a-f0-9]){4,6} *- *(0x[a-z0-9]{1,3});/;
const stringArrayCallRegExp1: RegExp = /var _0x(?:[a-f0-9]){4,6} *= *_0x(?:[a-f0-9]){4}\('(0x[a-z0-9]{1,3})'\) *\+ *0x1;/;
const stringArrayCallRegExp2: RegExp = /var _0x(?:[a-f0-9]){4,6} *= *_0x(?:[a-f0-9]){4}\('(0x[a-z0-9]{1,3})'\) *\+ *0x2;/;
const stringArrayCallRegExp3: RegExp = /var _0x(?:[a-f0-9]){4,6} *= *_0x(?:[a-f0-9]){4}\('(0x[a-z0-9]{1,3})'\) *\+ *0x3;/;

const expectedEvaluationResult: string = 'foo1bar2baz3';

let obfuscatedCode: string;

let stringArrayIndexShiftIndexValue: number;
let stringArrayCallIndexValue1: number;
let stringArrayCallIndexValue2: number;
let stringArrayCallIndexValue3: number;

let evaluationResult: string;

describe('Variant #1: simple', () => {
before(() => {
const code: string = readFileAsString(__dirname + '/fixtures/string-array-index-shift.js');

obfuscatedCode = JavaScriptObfuscator.obfuscate(
code,
{
...NO_ADDITIONAL_NODES_PRESET,
stringArray: true,
stringArrayThreshold: 1,
stringArrayIndexShift: true
}
).getObfuscatedCode();

stringArrayIndexShiftIndexValue = parseInt(getRegExpMatch(obfuscatedCode, stringArrayIndexShiftRegExp), 16);
stringArrayCallIndexValue1 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp1), 16);
stringArrayCallIndexValue2 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp2), 16);
stringArrayCallIndexValue3 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp3), 16);

evaluationResult = eval(obfuscatedCode);
});

it('should shift string array index in calls wrapper', () => {
assert.match(obfuscatedCode, stringArrayIndexShiftRegExp);
});

it('Match #1: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue1);
});

it('Match #2: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue2 - 1);
});

it('Match #3: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue3 - 2);
});

it('should correctly evaluate code', () => {
assert.equal(evaluationResult, expectedEvaluationResult);
});
});

describe('Variant #2: `rotateStringArray` option is enabled', () => {
before(() => {
const code: string = readFileAsString(__dirname + '/fixtures/string-array-index-shift.js');

obfuscatedCode = JavaScriptObfuscator.obfuscate(
code,
{
...NO_ADDITIONAL_NODES_PRESET,
stringArray: true,
stringArrayThreshold: 1,
stringArrayIndexShift: true,
rotateStringArray: true
}
).getObfuscatedCode();

stringArrayIndexShiftIndexValue = parseInt(getRegExpMatch(obfuscatedCode, stringArrayIndexShiftRegExp), 16);
stringArrayCallIndexValue1 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp1), 16);
stringArrayCallIndexValue2 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp2), 16);
stringArrayCallIndexValue3 = parseInt(getRegExpMatch(obfuscatedCode, stringArrayCallRegExp3), 16);

evaluationResult = eval(obfuscatedCode);
});

it('should shift string array index in calls wrapper', () => {
assert.match(obfuscatedCode, stringArrayIndexShiftRegExp);
});

it('Match #1: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue1);
});

it('Match #2: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue2 - 1);
});

it('Match #3: should create string array call with shifted index', () => {
assert.equal(stringArrayIndexShiftIndexValue, stringArrayCallIndexValue3 - 2);
});

it('should correctly evaluate code', () => {
assert.equal(evaluationResult, expectedEvaluationResult);
});
});

describe('Variant #3: `shuffleStringArray` option is enabled', () => {
before(() => {
const code: string = readFileAsString(__dirname + '/fixtures/string-array-index-shift.js');

obfuscatedCode = JavaScriptObfuscator.obfuscate(
code,
{
...NO_ADDITIONAL_NODES_PRESET,
stringArray: true,
stringArrayThreshold: 1,
stringArrayIndexShift: true,
shuffleStringArray: true
}
).getObfuscatedCode();

evaluationResult = eval(obfuscatedCode);
});

it('should shift string array index in calls wrapper', () => {
assert.match(obfuscatedCode, stringArrayIndexShiftRegExp);
});

it('should correctly evaluate code', () => {
assert.equal(evaluationResult, expectedEvaluationResult);
});
});

describe('Variant #4: `stringArrayWrappersCount` option is enabled and type is `function`', () => {
before(() => {
const code: string = readFileAsString(__dirname + '/fixtures/string-array-index-shift.js');

obfuscatedCode = JavaScriptObfuscator.obfuscate(
code,
{
...NO_ADDITIONAL_NODES_PRESET,
stringArray: true,
stringArrayThreshold: 1,
stringArrayIndexShift: true,
stringArrayWrappersCount: 1,
stringArrayWrappersType: StringArrayWrappersType.Function
}
).getObfuscatedCode();

evaluationResult = eval(obfuscatedCode);
});

it('should shift string array index in calls wrapper', () => {
assert.match(obfuscatedCode, stringArrayIndexShiftRegExp);
});

it('should correctly evaluate code', () => {
assert.equal(evaluationResult, expectedEvaluationResult);
});
});

describe('Variant #5: all string array options are enabled', () => {
before(() => {
const code: string = readFileAsString(__dirname + '/fixtures/string-array-index-shift.js');

obfuscatedCode = JavaScriptObfuscator.obfuscate(
code,
{
...NO_ADDITIONAL_NODES_PRESET,
rotateStringArray: true,
shuffleStringArray: true,
stringArray: true,
stringArrayEncoding: [
StringArrayEncoding.Rc4
],
stringArrayIndexShift: true,
stringArrayThreshold: 1,
stringArrayWrappersCount: 2,
stringArrayWrappersChainedCalls: true,
stringArrayWrappersType: 'function'
}
).getObfuscatedCode();

evaluationResult = eval(obfuscatedCode);
});

it('should shift string array index in calls wrapper', () => {
assert.match(obfuscatedCode, stringArrayIndexShiftRegExp);
});

it('should correctly evaluate code', () => {
assert.equal(evaluationResult, expectedEvaluationResult);
});
});
});

describe('Variant #4: same literal node values', () => {
const stringArrayRegExp: RegExp = /^var _0x([a-f0-9]){4} *= *\['test'\];/;
const stringArrayCallRegExp: RegExp = /var test *= *_0x([a-f0-9]){4}\('0x0'\);/;

Expand Down Expand Up @@ -91,7 +286,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #4: short literal node value', () => {
describe('Variant #5: short literal node value', () => {
const regExp: RegExp = /var test *= *'te';/;

let obfuscatedCode: string;
Expand All @@ -114,7 +309,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #5: base64 encoding', () => {
describe('Variant #6: base64 encoding', () => {
const stringArrayRegExp: RegExp = new RegExp(`^var _0x([a-f0-9]){4} *= *\\['${swapLettersCase('dGVzdA==')}'];`);
const stringArrayCallRegExp: RegExp = /var test *= *_0x([a-f0-9]){4}\('0x0'\);/;

Expand Down Expand Up @@ -143,7 +338,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #6: rc4 encoding', () => {
describe('Variant #7: rc4 encoding', () => {
describe('Variant #1: single string literal', () => {
const regExp: RegExp = /var test *= *_0x([a-f0-9]){4}\('0x0', *'.{4}'\);/;

Expand Down Expand Up @@ -209,7 +404,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #7: none and base64 encoding', () => {
describe('Variant #8: none and base64 encoding', () => {
describe('Variant #1: string array values', () => {
const samplesCount: number = 300;
const expectedMatchesChance: number = 0.5;
Expand Down Expand Up @@ -265,7 +460,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #8: none and rc4 encoding', () => {
describe('Variant #9: none and rc4 encoding', () => {
describe('Variant #1: string array calls wrapper call', () => {
const samplesCount: number = 300;
const expectedMatchesChance: number = 0.5;
Expand Down Expand Up @@ -321,7 +516,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #9: base64 and rc4 encoding', () => {
describe('Variant #10: base64 and rc4 encoding', () => {
describe('Variant #1: single string literal', () => {
const samplesCount: number = 300;
const expectedMatchesChance: number = 0.5;
Expand Down Expand Up @@ -377,7 +572,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #10: `stringArrayThreshold` option value', () => {
describe('Variant #11: `stringArrayThreshold` option value', () => {
const samples: number = 1000;
const stringArrayThreshold: number = 0.5;
const delta: number = 0.1;
Expand Down Expand Up @@ -420,7 +615,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #11: string array calls wrapper name', () => {
describe('Variant #12: string array calls wrapper name', () => {
const regExp: RegExp = /console\[b\('0x0'\)]\('a'\);/;

let obfuscatedCode: string;
Expand All @@ -444,7 +639,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #12: `reservedStrings` option is enabled', () => {
describe('Variant #13: `reservedStrings` option is enabled', () => {
describe('Variant #1: base `reservedStrings` values', () => {
describe('Variant #1: single reserved string value', () => {
const stringLiteralRegExp1: RegExp = /const foo *= *'foo';/;
Expand Down Expand Up @@ -566,7 +761,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #13: `forceTransformStrings` option is enabled', () => {
describe('Variant #14: `forceTransformStrings` option is enabled', () => {
describe('Variant #1: base `forceTransformStrings` values', () => {
describe('Variant #1: single force transform string value', () => {
const stringLiteralRegExp1: RegExp = /const foo *= *'foo';/;
Expand Down Expand Up @@ -787,7 +982,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #14: object expression key literal', () => {
describe('Variant #15: object expression key literal', () => {
describe('Variant #1: base key literal', () => {
const stringArrayRegExp: RegExp = /^var _0x([a-f0-9]){4} *= *\['bar'];/;
const objectExpressionRegExp: RegExp = /var test *= *{'foo' *: *_0x([a-f0-9]){4}\('0x0'\)};/;
Expand Down Expand Up @@ -845,7 +1040,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #15: import declaration source literal', () => {
describe('Variant #16: import declaration source literal', () => {
const importDeclarationRegExp: RegExp = /import *{ *bar *} *from *'foo';/;

let obfuscatedCode: string;
Expand All @@ -868,7 +1063,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #16: export all declaration source literal', () => {
describe('Variant #17: export all declaration source literal', () => {
const exportAllDeclarationRegExp: RegExp = /export *\* *from *'foo';/;

let obfuscatedCode: string;
Expand All @@ -891,7 +1086,7 @@ describe('StringArrayTransformer', function () {
});
});

describe('Variant #17: export named declaration source literal', () => {
describe('Variant #18: export named declaration source literal', () => {
const exportNamedDeclarationRegExp: RegExp = /export *{ *bar *} *from *'foo';/;

let obfuscatedCode: string;
Expand Down
9 changes: 9 additions & 0 deletions ...s/string-array-transformers/string-array-transformer/fixtures/string-array-index-shift.js
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@@ -0,0 +1,9 @@
function test () {
var foo = 'foo' + 1;
var bar = 'bar' + 2;
var baz = 'baz' + 3;

return foo + bar + baz;
}

test();

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