javascript-obfuscator/src/templates/string-array-nodes/string-array-calls-wrapper/StringArrayRC4DecodeNodeTemplate.ts at date-lock · ByteDecoder/javascript-obfuscator · GitHub

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import { IRandomGenerator } from '../../../interfaces/utils/IRandomGenerator';

/**
 * @param {IRandomGenerator} randomGenerator
 * @returns {string}
 * @constructor
 */
export function StringArrayRc4DecodeNodeTemplate (
    randomGenerator: IRandomGenerator
): string {
    const identifierLength: number = 6;
    const initializedIdentifier: string = randomGenerator.getRandomString(identifierLength);
    const rc4Identifier: string = randomGenerator.getRandomString(identifierLength);
    const dataIdentifier: string = randomGenerator.getRandomString(identifierLength);
    const onceIdentifier: string = randomGenerator.getRandomString(identifierLength);

    return `
        if ({stringArrayCallsWrapperName}.${initializedIdentifier} === undefined) {
            {atobPolyfill}

            {rc4Polyfill}
            {stringArrayCallsWrapperName}.${rc4Identifier} = rc4;

            {stringArrayCallsWrapperName}.${dataIdentifier} = {};

            {stringArrayCallsWrapperName}.${initializedIdentifier} = true;
        }

        var cachedValue = {stringArrayCallsWrapperName}.${dataIdentifier}[index];

        if (cachedValue === undefined) {
            if ({stringArrayCallsWrapperName}.${onceIdentifier} === undefined) {
                {selfDefendingCode}

                {stringArrayCallsWrapperName}.${onceIdentifier} = true;
            }

            value = {stringArrayCallsWrapperName}.${rc4Identifier}(value, key);
            {stringArrayCallsWrapperName}.${dataIdentifier}[index] = value;
        } else {
            value = cachedValue;
        }
    `;
}