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Copy pathJavaScriptObfuscator.ts
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304 lines (255 loc) · 11.3 KB
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import { inject, injectable, } from 'inversify';
import { ServiceIdentifiers } from './container/ServiceIdentifiers';
import * as acorn from 'acorn';
import * as escodegen from '@javascript-obfuscator/escodegen';
import * as ESTree from 'estree';
import { TObfuscatedCodeFactory } from './types/container/source-code/TObfuscatedCodeFactory';
import { ICodeTransformersRunner } from './interfaces/code-transformers/ICodeTransformersRunner';
import { IGeneratorOutput } from './interfaces/IGeneratorOutput';
import { IJavaScriptObfuscator } from './interfaces/IJavaScriptObfsucator';
import { ILogger } from './interfaces/logger/ILogger';
import { IObfuscatedCode } from './interfaces/source-code/IObfuscatedCode';
import { IOptions } from './interfaces/options/IOptions';
import { IRandomGenerator } from './interfaces/utils/IRandomGenerator';
import { INodeTransformersRunner } from './interfaces/node-transformers/INodeTransformersRunner';
import { CodeTransformer } from './enums/code-transformers/CodeTransformer';
import { CodeTransformationStage } from './enums/code-transformers/CodeTransformationStage';
import { LoggingMessage } from './enums/logger/LoggingMessage';
import { NodeTransformer } from './enums/node-transformers/NodeTransformer';
import { NodeTransformationStage } from './enums/node-transformers/NodeTransformationStage';
import { ecmaVersion } from './constants/EcmaVersion';
import { ASTParserFacade } from './ASTParserFacade';
import { NodeGuards } from './node/NodeGuards';
import { Utils } from './utils/Utils';
@injectable()
export class JavaScriptObfuscator implements IJavaScriptObfuscator {
/**
* @type {Options}
*/
private static readonly parseOptions: acorn.Options = {
ecmaVersion,
allowHashBang: true,
allowImportExportEverywhere: true,
allowReturnOutsideFunction: true,
locations: true,
ranges: true
};
/**
* @type {GenerateOptions}
*/
private static readonly escodegenParams: escodegen.GenerateOptions = {
comment: true,
verbatim: 'x-verbatim-property',
sourceMapWithCode: true
};
/**
* @type {CodeTransformer[]}
*/
private static readonly codeTransformersList: CodeTransformer[] = [
CodeTransformer.HashbangOperatorTransformer
];
/**
* @type {NodeTransformer[]}
*/
private static readonly nodeTransformersList: NodeTransformer[] = [
NodeTransformer.BooleanLiteralTransformer,
NodeTransformer.BlockStatementControlFlowTransformer,
NodeTransformer.BlockStatementSimplifyTransformer,
NodeTransformer.CommentsTransformer,
NodeTransformer.CustomCodeHelpersTransformer,
NodeTransformer.DeadCodeInjectionTransformer,
NodeTransformer.EscapeSequenceTransformer,
NodeTransformer.EvalCallExpressionTransformer,
NodeTransformer.ExportSpecifierTransformer,
NodeTransformer.ExpressionStatementsMergeTransformer,
NodeTransformer.FunctionControlFlowTransformer,
NodeTransformer.IfStatementSimplifyTransformer,
NodeTransformer.LabeledStatementTransformer,
NodeTransformer.RenamePropertiesTransformer,
NodeTransformer.MemberExpressionTransformer,
NodeTransformer.MetadataTransformer,
NodeTransformer.MethodDefinitionTransformer,
NodeTransformer.NumberLiteralTransformer,
NodeTransformer.NumberToNumericalExpressionTransformer,
NodeTransformer.ObfuscatingGuardsTransformer,
NodeTransformer.ObjectExpressionKeysTransformer,
NodeTransformer.ObjectExpressionTransformer,
NodeTransformer.ObjectPatternPropertiesTransformer,
NodeTransformer.ParentificationTransformer,
NodeTransformer.ScopeIdentifiersTransformer,
NodeTransformer.SplitStringTransformer,
NodeTransformer.StringArrayScopeCallsWrapperTransformer,
NodeTransformer.StringArrayTransformer,
NodeTransformer.TemplateLiteralTransformer,
NodeTransformer.VariableDeclarationsMergeTransformer,
NodeTransformer.VariablePreserveTransformer
];
/**
* @type {ICodeTransformersRunner}
*/
private readonly codeTransformersRunner: ICodeTransformersRunner;
/**
* @type {ILogger}
*/
private readonly logger: ILogger;
/**
* @type {TObfuscatedCodeFactory}
*/
private readonly obfuscatedCodeFactory: TObfuscatedCodeFactory;
/**
* @type {IOptions}
*/
private readonly options: IOptions;
/**
* @type {IRandomGenerator}
*/
private readonly randomGenerator: IRandomGenerator;
/**
* @type {INodeTransformersRunner}
*/
private readonly nodeTransformersRunner: INodeTransformersRunner;
/**
* @param {ICodeTransformersRunner} codeTransformersRunner
* @param {INodeTransformersRunner} nodeTransformersRunner
* @param {IRandomGenerator} randomGenerator
* @param {TObfuscatedCodeFactory} obfuscatedCodeFactory
* @param {ILogger} logger
* @param {IOptions} options
*/
public constructor (
@inject(ServiceIdentifiers.ICodeTransformersRunner) codeTransformersRunner: ICodeTransformersRunner,
@inject(ServiceIdentifiers.INodeTransformersRunner) nodeTransformersRunner: INodeTransformersRunner,
@inject(ServiceIdentifiers.IRandomGenerator) randomGenerator: IRandomGenerator,
@inject(ServiceIdentifiers.Factory__IObfuscatedCode) obfuscatedCodeFactory: TObfuscatedCodeFactory,
@inject(ServiceIdentifiers.ILogger) logger: ILogger,
@inject(ServiceIdentifiers.IOptions) options: IOptions
) {
this.codeTransformersRunner = codeTransformersRunner;
this.nodeTransformersRunner = nodeTransformersRunner;
this.randomGenerator = randomGenerator;
this.obfuscatedCodeFactory = obfuscatedCodeFactory;
this.logger = logger;
this.options = options;
}
/**
* @param {string} sourceCode
* @returns {IObfuscatedCode}
*/
public obfuscate (sourceCode: string): IObfuscatedCode {
if (typeof sourceCode !== 'string') {
sourceCode = '';
}
const timeStart: number = Date.now();
this.logger.info(LoggingMessage.Version, Utils.buildVersionMessage(process.env.VERSION, process.env.BUILD_TIMESTAMP));
this.logger.info(LoggingMessage.ObfuscationStarted);
this.logger.info(LoggingMessage.RandomGeneratorSeed, this.randomGenerator.getInputSeed());
// preparing code transformations
sourceCode = this.runCodeTransformationStage(sourceCode, CodeTransformationStage.PreparingTransformers);
// parse AST tree
const astTree: ESTree.Program = this.parseCode(sourceCode);
// obfuscate AST tree
const obfuscatedAstTree: ESTree.Program = this.transformAstTree(astTree);
// generate code
const generatorOutput: IGeneratorOutput = this.generateCode(sourceCode, obfuscatedAstTree);
// finalizing code transformations
generatorOutput.code = this.runCodeTransformationStage(generatorOutput.code, CodeTransformationStage.FinalizingTransformers);
const obfuscationTime: number = (Date.now() - timeStart) / 1000;
this.logger.success(LoggingMessage.ObfuscationCompleted, obfuscationTime);
return this.getObfuscatedCode(generatorOutput);
}
/**
* @param {string} sourceCode
* @returns {Program}
*/
private parseCode (sourceCode: string): ESTree.Program {
return ASTParserFacade.parse(sourceCode, JavaScriptObfuscator.parseOptions);
}
/**
* @param {Program} astTree
* @returns {Program}
*/
private transformAstTree (astTree: ESTree.Program): ESTree.Program {
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.Initializing);
const isEmptyAstTree: boolean = NodeGuards.isProgramNode(astTree)
&& !astTree.body.length
&& !astTree.leadingComments
&& !astTree.trailingComments;
if (isEmptyAstTree) {
this.logger.warn(LoggingMessage.EmptySourceCode);
return astTree;
}
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.Preparing);
if (this.options.deadCodeInjection) {
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.DeadCodeInjection);
}
if (this.options.controlFlowFlattening) {
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.ControlFlowFlattening);
}
if (this.options.renameProperties) {
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.RenameProperties);
}
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.Converting);
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.RenameIdentifiers);
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.StringArray);
if (this.options.simplify) {
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.Simplifying);
}
astTree = this.runNodeTransformationStage(astTree, NodeTransformationStage.Finalizing);
return astTree;
}
/**
* @param {string} sourceCode
* @param {Program} astTree
* @returns {IGeneratorOutput}
*/
private generateCode (sourceCode: string, astTree: ESTree.Program): IGeneratorOutput {
const escodegenParams: escodegen.GenerateOptions = {
...JavaScriptObfuscator.escodegenParams
};
if (this.options.sourceMap) {
escodegenParams.sourceMap = this.options.inputFileName || 'sourceMap';
escodegenParams.sourceContent = sourceCode;
}
const generatorOutput: IGeneratorOutput = escodegen.generate(astTree, {
...escodegenParams,
format: {
compact: this.options.compact
}
});
generatorOutput.map = generatorOutput.map ? generatorOutput.map.toString() : '';
return generatorOutput;
}
/**
* @param {IGeneratorOutput} generatorOutput
* @returns {IObfuscatedCode}
*/
private getObfuscatedCode (generatorOutput: IGeneratorOutput): IObfuscatedCode {
return this.obfuscatedCodeFactory(generatorOutput.code, generatorOutput.map);
}
/**
* @param {string} code
* @param {CodeTransformationStage} codeTransformationStage
* @returns {string}
*/
private runCodeTransformationStage (code: string, codeTransformationStage: CodeTransformationStage): string {
this.logger.info(LoggingMessage.CodeTransformationStage, codeTransformationStage);
return this.codeTransformersRunner.transform(
code,
JavaScriptObfuscator.codeTransformersList,
codeTransformationStage
);
}
/**
* @param {Program} astTree
* @param {NodeTransformationStage} nodeTransformationStage
* @returns {Program}
*/
private runNodeTransformationStage (astTree: ESTree.Program, nodeTransformationStage: NodeTransformationStage): ESTree.Program {
this.logger.info(LoggingMessage.NodeTransformationStage, nodeTransformationStage);
return this.nodeTransformersRunner.transform(
astTree,
JavaScriptObfuscator.nodeTransformersList,
nodeTransformationStage
);
}
}