Updated logic for random string array function position

2026-08-09 12:42:29 +00:00 · 2021-08-01 22:00:23 +03:00
parent c4abec8c2a
commit c364415a13
6 changed files with 207 additions and 30 deletions
@@ -10,7 +10,48 @@ import { readFileAsString } from '../../../helpers/readFileAsString';
 import { JavaScriptObfuscator } from '../../../../src/JavaScriptObfuscatorFacade';

 describe('StringArrayCallsWrapperCodeHelper', () => {
-    const regExp: RegExp = /_0x([a-f0-9]){4,6} *= *_0x([a-f0-9]){4,6} *- *0x0\;/;
+    const stringCallsWrapperRegExp: RegExp = /function _0x([a-f0-9]){4} *\(_0x([a-f0-9]){4,6} *,_0x([a-f0-9]){4,6}\)/;
+
+    describe('`stringArray` option is set', () => {
+        const samplesCount: number = 100;
+        const stringArrayCallsWrapperAtFirstPositionRegExp: RegExp = new RegExp(`^${stringCallsWrapperRegExp.source}`);
+        const variableDeclarationAtFirstPositionRegExp: RegExp = /^var test *= *_0x([a-f0-9]){4}\(0x0\);/;
+
+        let obfuscatedCode: string;
+        let stringArrayCallsWrapperAtFirstPositionMatchesCount: number = 0;
+        let variableDeclarationAtFirstPositionMatchesCount: number = 0;
+
+        before(() => {
+            const code: string = readFileAsString(__dirname + '/fixtures/simple-input.js');
+
+            for (let i = 0; i < samplesCount; i++) {
+                obfuscatedCode = JavaScriptObfuscator.obfuscate(
+                    code,
+                    {
+                        ...NO_ADDITIONAL_NODES_PRESET,
+                        stringArray: true,
+                        stringArrayThreshold: 1
+                    }
+                ).getObfuscatedCode();
+
+                if (obfuscatedCode.match(stringArrayCallsWrapperAtFirstPositionRegExp)) {
+                    stringArrayCallsWrapperAtFirstPositionMatchesCount++;
+                }
+
+                if (obfuscatedCode.match(variableDeclarationAtFirstPositionRegExp)) {
+                    variableDeclarationAtFirstPositionMatchesCount++;
+                }
+            }
+        });
+
+        it('Match #1: should correctly append code helper into the obfuscated code at random index', () => {
+            assert.isAbove(stringArrayCallsWrapperAtFirstPositionMatchesCount, 1);
+        });
+
+        it('Match #2: should correctly append code helper into the obfuscated code at random index', () => {
+            assert.isAbove(variableDeclarationAtFirstPositionMatchesCount, 1);
+        });
+    });

    describe('`stringArray` option is set', () => {
        let obfuscatedCode: string;
@@ -29,7 +70,7 @@ describe('StringArrayCallsWrapperCodeHelper', () => {
        });

        it('should correctly append code helper into the obfuscated code', () => {
-            assert.match(obfuscatedCode, regExp);
+            assert.match(obfuscatedCode, stringCallsWrapperRegExp);
        });
    });

@@ -49,15 +90,15 @@ describe('StringArrayCallsWrapperCodeHelper', () => {
        });

        it('shouldn\'t append code helper into the obfuscated code', () => {
-            assert.notMatch(obfuscatedCode, regExp);
+            assert.notMatch(obfuscatedCode, stringCallsWrapperRegExp);
        });
    });

    describe('Preserve string array name', () => {
        const callsWrapperRegExp: RegExp = new RegExp(`` +
-            `function *b *\\(c, *d\\) *{ *` +
+            `function *c *\\(b, *d\\) *{ *` +
                `var e *= *a\\(\\); *` +
-                `b *= *function *\\(f, *g\\) *{` +
+                `c *= *function *\\(f, *g\\) *{` +
                    `f *= *f *- *0x0; *` +
                    `var h *= *e\\[f]; *` +
        ``);
@@ -8,26 +8,46 @@ import { readFileAsString } from '../../../helpers/readFileAsString';
 import { JavaScriptObfuscator } from '../../../../src/JavaScriptObfuscatorFacade';

 describe('StringArrayCodeHelper', () => {
-    const regExp: RegExp = getStringArrayRegExp(['test']);
+    const stringArrayRegExp: RegExp = getStringArrayRegExp(['test']);

    describe('`stringArray` option is set', () => {
+        const samplesCount: number = 100;
+        const stringArrayAtFirstPositionRegExp: RegExp = new RegExp(`^${stringArrayRegExp.source}`);
+        const variableDeclarationAtFirstPositionRegExp: RegExp = /^var test *= *_0x([a-f0-9]){4}\(0x0\);/;
+
        let obfuscatedCode: string;
+        let stringArrayAtFirstPositionMatchesCount: number = 0;
+        let variableDeclarationAtFirstPositionMatchesCount: number = 0;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/simple-input.js');

-            obfuscatedCode = JavaScriptObfuscator.obfuscate(
-                code,
-                {
-                    ...NO_ADDITIONAL_NODES_PRESET,
-                    stringArray: true,
-                    stringArrayThreshold: 1
+            for (let i = 0; i < samplesCount; i++) {
+                obfuscatedCode = JavaScriptObfuscator.obfuscate(
+                    code,
+                    {
+                        ...NO_ADDITIONAL_NODES_PRESET,
+                        stringArray: true,
+                        stringArrayThreshold: 1
+                    }
+                ).getObfuscatedCode();
+
+                if (obfuscatedCode.match(stringArrayAtFirstPositionRegExp)) {
+                    stringArrayAtFirstPositionMatchesCount++;
                }
-            ).getObfuscatedCode();
+
+                if (obfuscatedCode.match(variableDeclarationAtFirstPositionRegExp)) {
+                    variableDeclarationAtFirstPositionMatchesCount++;
+                }
+            }
        });

-        it('should correctly append code helper into the obfuscated code', () => {
-            assert.match(obfuscatedCode, regExp);
+        it('Match #1: should correctly append code helper into the obfuscated code at random index', () => {
+            assert.isAbove(stringArrayAtFirstPositionMatchesCount, 1);
+        });
+
+        it('Match #2: should correctly append code helper into the obfuscated code at random index', () => {
+            assert.isAbove(variableDeclarationAtFirstPositionMatchesCount, 1);
        });
    });

@@ -47,7 +67,7 @@ describe('StringArrayCodeHelper', () => {
        });

        it('shouldn\'t append code helper into the obfuscated code', () => {
-            assert.notMatch(obfuscatedCode, regExp);
+            assert.notMatch(obfuscatedCode, stringArrayRegExp);
        });
    });
 });
@@ -207,7 +207,7 @@ describe('StringArrayCallsWrapperTemplate', () => {
            const selfDefendingEnabled: boolean = true;

            describe('Variant #1: correct code evaluation for single-line code', () => {
-                describe('Variant #1: index shift amount is `0`', () => {
+                describe('Variant #1: long decoded string', () => {
                    const index: string = '0x0';

                    const indexShiftAmount: number = 0;
@@ -258,10 +258,62 @@ describe('StringArrayCallsWrapperTemplate', () => {
                        assert.deepEqual(decodedValue, expectedDecodedValue);
                    });
                });
+
+                describe('Variant #2: 3-characters decoded string', () => {
+                    const index: string = '0x0';
+
+                    const indexShiftAmount: number = 0;
+
+                    const expectedDecodedValue: string = 'foo';
+
+                    let decodedValue: string;
+
+                    before(async() => {
+                        const stringArrayTemplate = format(StringArrayTemplate(), {
+                            stringArrayName,
+                            stringArrayFunctionName,
+                            stringArrayStorageItems: `'${cryptUtilsSwappedAlphabet.btoa('foo')}'`
+                        });
+                        const atobPolyfill = format(AtobTemplate(selfDefendingEnabled), {
+                            atobFunctionName
+                        });
+                        const atobDecodeTemplate: string = format(
+                            StringArrayBase64DecodeTemplate(randomGenerator),
+                            {
+                                atobPolyfill,
+                                atobFunctionName,
+                                selfDefendingCode: '',
+                                stringArrayCacheName,
+                                stringArrayCallsWrapperName
+                            }
+                        );
+                        const stringArrayCallsWrapperTemplate: string = await minimizeCode(
+                            format(StringArrayCallsWrapperTemplate(), {
+                                decodeCodeHelperTemplate: atobDecodeTemplate,
+                                indexShiftAmount,
+                                stringArrayCacheName,
+                                stringArrayCallsWrapperName,
+                                stringArrayFunctionName
+                            })
+                        );
+
+                        decodedValue = Function(`
+                            ${stringArrayTemplate}
+                        
+                            ${stringArrayCallsWrapperTemplate}
+                            
+                            return ${stringArrayCallsWrapperName}(${index});
+                        `)();
+                    });
+
+                    it('should correctly return decoded value', () => {
+                        assert.deepEqual(decodedValue, expectedDecodedValue);
+                    });
+                });
            });

            describe('Variant #2: invalid code evaluation for multi-line code', () => {
-                describe('Variant #1: index shift amount is `0`', () => {
+                describe('Variant #1: long decoded string', () => {
                    const index: string = '0x0';

                    const indexShiftAmount: number = 0;
@@ -306,7 +358,57 @@ describe('StringArrayCallsWrapperTemplate', () => {
                        `)();
                    });

-                    it('should correctly return decoded value', () => {
+                    it('should return invalid decoded value', () => {
+                        assert.deepEqual(decodedValue, expectedDecodedValue);
+                    });
+                });
+
+                describe('Variant #2: 3-characters decoded string', () => {
+                    const index: string = '0x0';
+
+                    const indexShiftAmount: number = 0;
+
+                    const expectedDecodedValue: string = 'foo';
+
+                    let decodedValue: string;
+
+                    before(() => {
+                        const stringArrayTemplate = format(StringArrayTemplate(), {
+                            stringArrayName,
+                            stringArrayFunctionName,
+                            stringArrayStorageItems: `'${cryptUtilsSwappedAlphabet.btoa('foo')}'`
+                        });
+                        const atobPolyfill = format(AtobTemplate(selfDefendingEnabled), {
+                            atobFunctionName
+                        });
+                        const atobDecodeTemplate: string = format(
+                            StringArrayBase64DecodeTemplate(randomGenerator),
+                            {
+                                atobPolyfill,
+                                atobFunctionName,
+                                selfDefendingCode: '',
+                                stringArrayCacheName,
+                                stringArrayCallsWrapperName
+                            }
+                        );
+                        const stringArrayCallsWrapperTemplate: string = format(StringArrayCallsWrapperTemplate(), {
+                            decodeCodeHelperTemplate: atobDecodeTemplate,
+                            indexShiftAmount,
+                            stringArrayCacheName,
+                            stringArrayCallsWrapperName,
+                            stringArrayFunctionName
+                        });
+
+                        decodedValue = Function(`
+                            ${stringArrayTemplate}
+                        
+                            ${stringArrayCallsWrapperTemplate}
+                            
+                            return ${stringArrayCallsWrapperName}(${index});
+                        `)();
+                    });
+
+                    it('should return invalid decoded value', () => {
                        assert.deepEqual(decodedValue, expectedDecodedValue);
                    });
                });
@@ -435,7 +537,7 @@ describe('StringArrayCallsWrapperTemplate', () => {
            const selfDefendingEnabled: boolean = true;

            describe('Variant #1: correct code evaluation for single-line code', () => {
-                describe('Variant #1: index shift amount is `0`', () => {
+                describe('Variant #1: long decoded string', () => {
                    const index: string = '0x0';
                    const key: string = 'key';

@@ -497,7 +599,7 @@ describe('StringArrayCallsWrapperTemplate', () => {
            });

            describe('Variant #2: invalid code evaluation for multi-line code', () => {
-                describe('Variant #1: index shift amount is `0`', () => {
+                describe('Variant #1: long decoded string', () => {
                    const index: string = '0x0';
                    const key: string = 'key';