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JavaScriptObfuscatorInternal.ts
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105 lines (86 loc) · 3 KB
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import * as esprima from 'esprima';
import * as escodegen from 'escodegen';
import * as ESTree from 'estree';
import { Chance } from 'chance';
import { IObfuscatorOptions } from './interfaces/IObfuscatorOptions';
import { IGeneratorOutput } from './interfaces/IGeneratorOutput';
import { IObfuscationResult } from './interfaces/IObfuscationResult';
import { IOptions } from './interfaces/IOptions';
import { ObfuscationResult } from './ObfuscationResult';
import { Obfuscator } from './Obfuscator';
import { Options } from './options/Options';
import { SourceMapCorrector } from './SourceMapCorrector';
import { Utils } from './Utils';
export class JavaScriptObfuscatorInternal {
/**
* @type {GenerateOptions}
*/
private static escodegenParams: escodegen.GenerateOptions = {
verbatim: 'x-verbatim-property',
sourceMapWithCode: true
};
/**
* @type {IGeneratorOutput}
*/
private generatorOutput: IGeneratorOutput;
/**
* @type {IOptions}
*/
private options: IOptions;
/**
* @type {string}
*/
private sourceCode: string;
/**
* @param sourceCode
* @param obfuscatorOptions
*/
constructor (sourceCode: string, obfuscatorOptions: IObfuscatorOptions = {}) {
this.sourceCode = sourceCode;
this.options = new Options(obfuscatorOptions);
}
/**
* @param sourceCode
* @param astTree
* @param options
*/
private static generateCode (sourceCode: string, astTree: ESTree.Node, options: IOptions): IGeneratorOutput {
const escodegenParams: escodegen.GenerateOptions = Object.assign(
{},
JavaScriptObfuscatorInternal.escodegenParams
);
if (options.sourceMap) {
escodegenParams.sourceMap = 'sourceMap';
escodegenParams.sourceContent = sourceCode;
}
escodegenParams.format = {
compact: options.compact
};
const generatorOutput: IGeneratorOutput = escodegen.generate(astTree, escodegenParams);
generatorOutput.map = generatorOutput.map ? generatorOutput.map.toString() : '';
return generatorOutput;
}
/**
* @returns {IObfuscationResult}
*/
public getObfuscationResult (): IObfuscationResult {
return new SourceMapCorrector(
new ObfuscationResult(
this.generatorOutput.code,
this.generatorOutput.map
),
this.options.sourceMapBaseUrl + this.options.sourceMapFileName,
this.options.sourceMapMode
).correct();
}
public obfuscate (): void {
let astTree: ESTree.Node = esprima.parse(this.sourceCode, {
loc: true
});
if (this.options.seed !== 0) {
Utils.setRandomGenerator(new Chance(this.options.seed));
}
astTree = new Obfuscator(this.options).obfuscateNode(astTree);
this.generatorOutput = JavaScriptObfuscatorInternal.generateCode(this.sourceCode, astTree, this.options);
}
}